Wolves masquerading as sheep: the fallout

29 10 2010

 


© New Zealand Films

 

Well, we’ve managed to stimulate quite a lively conversation after dropping the Open Letter about Scientific Credibility and the Conservation of Tropical Forests regarding the questionable tactics employed by Alan Oxley and his industrial lobbyist organisations.

Mr. Oxley has responded with vitriol, hand-waving, red herrings and straw men, and failed to address even a single one of our accusations. I am particularly amused by his insinuation that we, the proven scientists, don’t know what science is – but that he does.

Below I reproduce Mr. Oxley’s reaction to our original letter, followed by our response.

I’ll let you, the reader, decide who is most reasonable.

REACTION FROM ALAN OXLEY

There is too much pseudo-scientific hype today about environmentalism and forestry and not enough fact.

I put this double-barrelled question to the Group of 12 scientists who have rather laboriously wandered over the work of World Growth: What biodiversity is expressly protected by a global cessation of conversion of forest land to other purposes and how is that biodiversity scientifically measured? And let’s have some technical response, not political blather. Read the rest of this entry »





Global erosion of ecosystem services

14 09 2010

A few months ago I was asked to give a lecture about erosion of ecosystem services to students in the University of Adelaide‘s Issues in Sustainable Environments unit. I gave that lecture last week and just uploaded a slidecast of the presentation (with audio) today.

I’ve reproduced the lecture here for your viewing pleasure. I hope you find the 45-minute presentation useful. Note that the first few minutes cover me referring to the Biodiversity film short that I posted not too long ago.

CJA Bradshaw





Global rates of forest loss – everyone’s a bastard

29 04 2010

© A. Hesse

I’ve written rather a lot about rates of forest loss around the world, including accumulated estimates of tropical forest loss and increasing fragmentation/loss in the boreal forest (see Bradshaw et al. 2009 Front Ecol Evol & Bradshaw et al. 2009 Trends Ecol Evol). For the tropics in particular, we used the index that an area of rain forest about the size of Bangladesh (> 15 million hectares) was disappearing each year, and in Russia alone, annual decline in forest area averaged 1.1 million hectares between 1988 and 1993. Mind boggling, really.

But some of these estimates were a bit old, relied on some imprecise satellite data, and didn’t differentiate forest types well. In addition, many have questioned whether the rates are continuing and which countries are being naughty or nice with respect to forest conservation.

It was great therefore when I came across a new paper in PNAS by Hansen & colleagues entitled Quantification of global gross forest cover loss because it answered many of the latter questions.

Part of the problem in assessing worldwide forest cover loss in the past was the expense of satellite imagery, access problems, data storage and processing issues. Happily, new satellite streams and easing of access has rectified many of these limitations. Hansen & colleagues took advantage of data from the MODIS sensor to create a stratification for forest cover loss. They then used the Landsat ETM+ sensor as the primary data for quantifying gross forest cover loss for the entire planet from 2000 to 2005. They defined ‘forest cover’ as “… 25% or greater canopy closure at the Landsat pixel scale (30-m × 30-m spatial resolution) for trees > 5 m in height”.

For your reading pleasure (and conservation horror), the salient features were: Read the rest of this entry »





New April Issue of Conservation Letters out now

22 04 2010

Low intensity fire in a longleaf pine-wiregrass system

Another great line up of papers has just come out in the April Issue of Conservation Letters:

CJA Bradshaw

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China’s insatiable lust for tropical timber

4 04 2010

If you’ve been following ConservationBytes.com for the past few weeks, you’ll know that William Laurance was in town and gave a fantastic set of talks (download podcasts here). As a parting gift, he put together a brief post on one huge aspect of the tropical deforestation crisis we know face. Thanks, Bill.

© AAAS

I greatly enjoyed my recent visit to the University of Adelaide, and especially want to thank my host, Corey Bradshaw, for showing me a wonderful time there.

Corey asked me to contribute a brief blog for ConservationBytes.com and so I thought I’d highlight a paper in Science last week by my old friend Jianguo “Jack” Liu at Michigan State University. In his paper China’s road to sustainability, Jack describes the battle to improve environmental sustainability in China–a battle that is not progressing very well, all factors considered.

China’s explosive economic growth and environmental deterioration is also affecting other countries, especially those with timber, minerals or other resources that China wants. Today, more than half of the timber shipped anywhere in the world is destined for China–some 45 million m3 per year, an incredible total. Read the rest of this entry »





Don’t miss Bill

25 03 2010

Yes, yes, I know I’ve posted only a little under two weeks ago that the venerable William (Bill) Laurance is coming to Adelaide, and anyone even remotely interested in biodiversity conservation would be a fool to miss his talks, and ra, ra, ra…

Well, you would be.

However, I don’t want anyone to miss this opportunity simply because of non-recognition. So I thought it prudent to remind people just how special this visit is, and what a researcher extraordinaire Bill really is. For those not necessarily following the trends in tropical conservation biology (probably not many in Adelaide, at least), you might not necessarily recognise his name.

So, I thought I’d give a little broadsheet of his achievements, Read the rest of this entry »





Bill Laurance coming to Adelaide

13 03 2010

We’ve got a real treat for biodiversity buffs scheduled for the end of March. Eminent (Distinguished, Famous, Respected… the list goes on) Professor William (Bill) Laurance is briefly leaving his tropical world and coming south to the temperate climes of Adelaide to regale us with his fascinating biodiversity research career.

Bill is a leading conservation biologist who has worked internationally on many high-profile threats to tropical forests—in the Amazon, Central America, Africa, and Australasia. A highly prolific scientist, to date he has published five books and over 300 scientific articles. Bill has recently commenced a position as Distinguished Research Professor at James Cook University and is involved with the Smithsonian Tropical Research Institute in Panama. He also happens to be the bloke that blew the lid open on the devastating effects of tropical fragmentation in the Amazon with some of the best long-term experiments ever done in conservation biology.

I’m personally very pleased for several reasons: (1) Although I have never met Bill in person yet, I’ve recently co-authored two papers with him (Wash and spin cycle threats to tropical biodiversity and Improving the performance of the Roundtable on Sustainable Palm Oil for nature conservation) and I’m keen to meet the man behind the pen; (2) we have had many email discussions (some of them rather heated!), so I’m keen to flesh some of these out over a nice glass of South Australian Shiraz; (3) he’s been a keen supporter of my work for years, and has given me many opportunities to get my research noticed; and (4) it’s high time to met one of ConservationBytes.com Conservation Scholars.

Bill has recently shifted shop from Panama (Smithsonian Tropical Research Institute) to Australia’s own James Cook University, and so we at the Environment Institute thought we should take advantage of his geographical disorientation and bring him down south for a while. But he’s going to have to sing for his supper, so he’s kindly agreed to give three talks in 3 days from 29-31 March 2010.

His first talk (on Monday 29 March) will be an in-house Environment Institute seminar, but the second two will be public events that I urge anyone remotely interested in biodiversity conservation research to attend. In fact, his Tuesday 30 March presentation (18.00-20.00 Napier G03, University of Adelaide) is even more generic than that, and word on the street is it is highly entertaining and extremely well attended wherever Bill’s is gracious enough to give it:

Amplify Your Voice: Keys to Having a Prolific Scientific Career (and Bill would know).

This will include (1) How to be more prolific: strategies for writing and publishing scientific papers and (2) Further ways to maximise your scientific impact – interacting with the popular media and how to promote yourself. Each topic will run for 50 minutes and will include 10 minutes for audience questions. A tea and coffee break will be held between sessions. Book here.

His second public talk on Wednesday 31 March (18.00-19.30 Napier 102, University of Adelaide) will be:

Diagnosis Critical | The lungs of our Planet

Here he will be discussing how the forests of our world are in crisis. Our drive for continued economic growth has had devastating consequences for the world’s ecosystems that provide critical human services. Our forests are a haven for countless plant and animal species that form the basis of ecological services, these services are the biological mechanisms that make the world our home. Book here.

So, if you have a couple of free nights at the end of the month and are in Adelaide, I strongly recommend you come out and see Bill do his thing.

CJA Bradshaw

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Covet thy neighbour’s paddock

2 03 2010

Apologies to Matt Lucas

An interesting, frightening and and at the same time, potentially hopeful, paper has just appeared in the latest issue of Proceedings of the Royal Society B.

Co-authored by a previously highlighted Conservation Scholar Georgina Mace, the paper by Boakes and colleagues entitled Extreme contagion in global habitat clearance is probably one of the strongest bits of evidence to save intact habitat complexes.

Yes, yes – save things so you don’t destroy biodiversity. What’s new about that? Well, Boakes and colleagues’ paper shows at a global scale that over the last 300+ years, the chance of a patch of forest or grassland being converted to agriculture depends strongly on whether its neighbouring patch has already been cleared. In other words, once you start to hack away at natural habitats, people have a tendency to assume that it’s perfectly acceptable to do the same on their own patch.

The authors reprojected the History Database of the Global Environment to ~ a 50 x 50 grid and examined habitat conversion from 1700 to the present (in 50-year increments). Using some rather simple contagion statistics, they came up with the startling result that conversion probability is strongly dependent on whether an adjacent cell has already been converted.

What I found particularly frightening was the result that:

“A quarter of the world’s forest and half its grassland has been converted to agriculture since 1700.”

and from a personal perspective, the highest grassland conversion rates have happened in Australasia (the highest forest conversion rates have been in the Indo-Malay and Nearctic realms).

What are the implications for conservation? In my opinion, this relatively simple analysis and result confirms even more strongly that saving intact, large tracts of forest and grassland is essential for long-term biodiversity conservation. Cutting up the forest into smaller bits not only compromises biodiversity via fragmentation, it ends up speeding the entire process of full-scale ecosystem degradation.

‘Get ’em protected while they’re still unaffected’.

CJA Bradshaw

ResearchBlogging.orgBoakes, E., Mace, G., McGowan, P., & Fuller, R. (2009). Extreme contagion in global habitat clearance Proceedings of the Royal Society B: Biological Sciences, 277 (1684), 1081-1085 DOI: 10.1098/rspb.2009.1771

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Conservation Biology for All

26 12 2009

A new book that I’m proud to have had a hand in writing is just about to come out with Oxford University Press called Conservation Biology for All. Edited by the venerable Conservation Scholars, Professors Navjot Sodhi (National University of Singapore) and Paul Ehrlich (Stanford University), it’s a powerhouse of some of the world’s leaders in conservation science and application.

The book strives to “…provide cutting-edge but basic conservation science to a global readership”. In short, it’s written to bring the forefront of conservation science to the general public, with OUP promising to make it freely available online within about a year from its release in early 2010 (or so the rumour goes). The main idea here is that those in most need of such a book – the conservationists in developing nations – can access the wealth of information therein without having to sacrifice the village cow to buy it.

I won’t go into any great detail about the book’s contents (mainly because I have yet to receive my own copy and read most of the chapters!), but I have perused early versions of Kevin Gaston‘s excellent chapter on biodiversity, and Tom Brook‘s overview of conservation planning and prioritisation. Our chapter (Chapter 16 by Barry Brook and me), is an overview of statistical and modelling philosophy and application with emphasis on conservation mathematics. It’s by no means a complete treatment, but it’s something we want to develop further down the track. I do hope many people find it useful.

I’ve reproduced the chapter title line-up below, with links to each of the authors websites.

  1. Conservation Biology: Past and Present (C. Meine)
  2. Biodiversity (K. Gaston)
  3. Ecosystem Functions and Services (C. Sekercioglu)
  4. Habitat Destruction: Death of a Thousand Cuts (W. Laurance)
  5. Habitat Fragmentation and Landscape Change (A. Bennett & D. Saunders)
  6. Overharvesting (C. Peres)
  7. Invasive Species (D. Simberloff)
  8. Climate Change (T. Lovejoy)
  9. Fire and Biodiversity (D. Bowman & B. Murphy)
  10. Extinctions and the Practice of Preventing Them (S. Pimm & C. Jenkins)
  11. Conservation Planning and Priorities (T. Brooks)
  12. Endangered Species Management: The US Experience (D. Wilcove)
  13. Conservation in Human-Modified Landscapes (L.P. Koh & T. Gardner)
  14. The Roles of People in Conservation (A. Claus, K. Chan & T. Satterfield)
  15. From Conservation Theory to Practice: Crossing the Divide (M. Rao & J. Ginsberg)
  16. The Conservation Biologist’s Toolbox – Principles for the Design and Analysis of Conservation Studies (C. Bradshaw & B. Brook)

As you can see, it’s a pretty impressive collection of conservation stars and hard-hitting topics. Can’t wait to get my own copy! I will probably blog individual chapters down the track, so stay tuned.

CJA Bradshaw

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Connectivity paradigm in extinction biology

6 10 2009

networkI’m going to do a double review here of two papers currently online in Proceedings of the Royal Society B: Biological Sciences. I’m lumping them together because they both more or less challenge the pervasive conservation/restoration paradigm that connectivity is the key to reducing extinction risk. It’s just interesting (and slightly amusing) that the two were published in the same journal and at about the same time, but by two different groups.

From our own work looking at the correlates of extinction risk (measured mainly by proxy as threat risk), the range of a population (i.e., the amount of area and number of habitats it covers) is the principal determinant of risk – the smaller your range, the greater your chance of shuffling off this mortal coil (see also here). This is, of course, because a large range usually means that you have some phenotypic plasticity in your habitat requirements, you can probably disperse well, and your not going to succumb to localised ‘catastrophes’ as often. It also probably means (but not always) that your population size increases as your range size increases; as we all know, populations must be beyond their minimum viable population size to have a good chance of persisting random demographic and environmental vagaries.

Well, the two papers in question, ‘Both population size and patch quality affect local extinctions and colonizations‘ by Franzén & Nilssen and ‘Environment, but not migration rate, influences extinction risk in experimental metapopulations‘ by Griffen & Drake, show that connectivity (i.e., the probability that populations are connected via migration) are probably the least important components in the extinction-persistence game.

Using a solitary bee (Andrena hattorfiana) metapopulation in Sweden, Franzén & Nilssen show that population size and food patch quality (measured by number of pollen-producing plants) were directly (but independently) correlated with extinction risk. Bigger populations in stable, high-quality patches persisted more readily. However, connectivity between patches was uncorrelated with risk.

Griffen & Drake took quite a different approach and stacked experimental aquaria full of daphnia (Daphnia magna) on top of one another to influence the amount of light (and hence, amount of food from algal growth) to which the populations had access (it’s interesting to note here that this was unplanned in the experiment – the different algal growth rates related to the changing exposure to light was a serendipitous discovery that allowed them to test the ‘food’ hypothesis!). They also controlled the migration rate between populations by varying the size of holes connecting the aquaria. In short, they found that environmentally influenced (i.e., food-influenced) variation was far more important at dictating population size and fluctuation than migration, showing again that conditions promoting large population size and reducing temporal variability are essential for reducing extinction risk.

So what’s the upshot for conservation? Well, many depressed populations are thought to be recoverable by making existing and fragmented habitat patches more connected via ‘corridors’ of suitable habitat. The research highlighted here suggests that more emphasis should be placed instead on building up existing population sizes and ensuring food availability is relatively constant instead of worrying about how many trickling migrants might be moving back and forth. This essentially means that a few skinny corridors connecting population fragments will probably be insufficient to save our imperilled species.

CJA Bradshaw

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ResearchBlogging.org

This post was chosen as an Editor's Selection for ResearchBlogging.org

Franzen, M., & Nilsson, S. (2009). Both population size and patch quality affect local extinctions and colonizations Proceedings of the Royal Society B: Biological Sciences DOI: 10.1098/rspb.2009.1584

Griffen, B., & Drake, J. (2009). Environment, but not migration rate, influences extinction risk in experimental metapopulations Proceedings of the Royal Society B: Biological Sciences DOI: 10.1098/rspb.2009.1153





How to make an effective marine protected area

22 09 2009

Here’s a nice little review from the increasingly impressive Frontiers in Ecology and the Environment which seems to be showcasing a lot of good conservation research lately.

© USGS

© USGS

As we know, the world’s oceans are under huge threat, with predictions of 70 % loss of coral reefs by 2050, decline in kelp forests, loss of seagrasses, over-fishing, pollution and a rapidly warming and acidifying physical environment. Given all these stressors, it is absolutely imperative we spend a good deal of time thinking about the right way to impose restrictions on damage to marine areas – the simplest way to do this is via marine protected areas (MPA).

The science of MPA network design has matured over the last 10-20 years such that there is a decent body of literature now on what we need to do (now the policy makers just have to listen – some  progress there too, but see also here). McLeod and colleagues in the latest issue of Frontiers in Ecology and the Environment have published a review outlining the best, at least for coral reefs, set of recommendations for MPA network design given available information (paper title: Designing marine protected area networks to address the impacts of climate change). Definitely one for the Potential list.

Here’s what they recommend:

Size

  • bigger is always better
  • minimum diameter of an MPA should be 10-20 km to ensure exchange of propagules among protected benthic populations

Shape

  • simple shapes best (squares, rectangles)
  • avoid convoluted shapes to minimise edge effects

Representation

  • protect at least 20-30 % of each habitat

Replication

  • protect at least 3 examples of each marine habitat

Spread

  • select MPA in a variety of temperature regimes to avoid risk of all protected reefs succumbing to future climate changes

Critical Areas

  • protect nursery areas, spawning aggregations, and areas of high species diversity
  • protect areas demonstrating natural resilience or rapid recovery from previous disturbances

Connectivity

  • measure connectivity between MPA to ensure replenishment
  • space maximum distance of 15-20 km apart
  • include whole ecological units
  • buffer core areas
  • protect adjacent areas such as outlying reefs, seagrass beds, mangroves

Ecosystem Function

  • maintain key functional groups of species (e.g., herbivorous fishes)

Ecosystem Management

  • embed MPA in broader management frameworks addressing other threats
  • address and rectify sources of pollution
  • monitor changes

Of course, this is just a quick-and-dirty list as presented here – I highly recommend reading the review for specifics.

CJA Bradshaw

ResearchBlogging.orgMcLeod, E., Salm, R., Green, A., & Almany, J. (2009). Designing marine protected area networks to address the impacts of climate change Frontiers in Ecology and the Environment, 7 (7), 362-370 DOI: 10.1890/070211





Burning away ecological ignorance

24 08 2009

This is the last post from the 10th International Congress of Ecology (INTECOL) in Brisbane. I’ve just returned after a long, but good week.

fire

© ABC Landline

Following my last two posts (here and here) from INTECOL, I end with a post about the very final talk of the Congress by a very well-known conservation ecologist, Professor David Lindenmayer of the Australian National University. David is a prolific and highly respected ecologist specialising in long-term ecological studies measuring forest biodiversity change. What made this final talk so compelling (and compelling it had to be after 5 straight days of talks) was not that it was essentially his acceptance ‘speech’ for winning the Ecological Society of Australia‘s Australian Ecology Research Award (AERA), it was the personal side of his science that kept the audience rapt.

As many CB readers will know, Australia (the state of Victoria in particular) suffered earlier this year some of the worst forest fires on record. Many died and many millions in property were damaged. Since then, everyone from Germaine Greer to MP Wilson Tuckey has become a laughably unqualified fire expert, but few have sufficient knowledge or experience to prescribe the most parsimonious fire regime for Victoria’s wet temperate forests.

Now, I think David was unfortunate to lose either friends or family in those fires, and he’s been collecting biodiversity data there and studying the ecology of south Australian fires for over two decades. Suffice it to say, he probably knows what he’s talking about.

So when the baying hounds of public misunderstanding demand that the remaining bush fragments of Victorian forests be cleared to protect people and property (so-called ‘hazard-reduction burning’), I think we should listen instead to David Lindenmayers of this world.

David’s talk was about just this – how the fires are portrayed as the Apocalypse itself by the media, when in reality ecosystems generally bounce back very quickly. Indeed, even in some of the most heavily burnt sites, most of the standing carbon in the vegetation remains (despite appearances). He also explained that our knowledge of temperate fire regimes is rudimentary at best, and that available evidence from the Northern Hemisphere suggests that clearing forests actually can lead to a HIGHER fire proneness, intensity and frequency. He explained how the homogenisation of fire patterns destroy are weakening essential ecosystem functions, and that spatial and temporal fire patchiness is essential to maintain ecosystems and the people living in them.

In summary, we have failed to learn lessons from northern Australia about buggering up the natural fire regime (see previous post). We as a society fall victim to sensationalist and uninformed media reports and develop ill-advised, knee-jerk policies as a result. Ecological considerations for our own welfare have been overlooked too long. It’s time politicians stop fuelling the fires of public ignorance and listen to the ecologists out there who know a thing or two about complex ecosystem structure and the disturbance regimes that create them.

Thanks, David, for a sobering reminder of the importance of our work.

CJA Bradshaw

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Fragmen borealis: degradation of the world’s last great forest

12 08 2009
© energyportal.eu

© energyportal.eu

I have the dubious pleasure today of introducing a recently published paper of ours that was at the same time both intellectually stimulating and demoralising to write. I will make no apologies for becoming emotionally involved in the scientific issues about which my colleagues and I write (as long as I can maintain with absolute sincerity that the data used and conclusions drawn are as objectively presented as I am capable), and this paper probably epitomises that stance more than most I’ve written during my career.

The topic is especially important to me because of its subtle, yet potentially disastrous consequences for biodiversity and climate change. It’s also a personal issue because it’s happening in a place I used to (many, many years ago) call home.

Despite comprising about a third of the world’s entire forested area and harbouring some of the lowest human densities anywhere, the great boreal forest that stretches across Alaska, Canada, Scandinavia and a huge chunk of Russia is under severe threat.

Surprised that we’re not talking about tropical deforestation for once? Surprised that so-called ‘developed’ nations are pilfering the last great carbon sink and biodiversity haven left on the planet? If you have read any of the posts on this blog, you probably shouldn’t be.

The paper today appeared online in Trends in Ecology and Evolution and is entitled Urgent preservation of boreal carbon stocks and biodiversity (by CJA Bradshaw, IG Warkentin & NS Sodhi). It’s essentially a review of the status of the boreal forest from a biodiversity perspective, and includes a detailed assessment of the degree of its fragmentation, species threat, climate- and human-influenced disturbance regime, and its carbon sequestration/emission status. I’ll summarise some of the main findings below:

borealfire

© NASA

  • Russia contains ~53 % of the boreal forest, followed by Canada (25 %), USA (18 %, mostly in Alaska), Sweden (2 %) and Finland and Norway (~1 % each); there are small areas of boreal forest in northern China and Mongolia.
  • Fire is the main driver of change in the boreal forest. Although clearing for logging and mining abounds, it pales in comparison to the massive driver that is fire.
  • There is evidence that climate change is increasing the frequency and possibly extent of fires in the boreal zone. That said, most fires are started by humans, and this is particularly the case in the largest expanse in Russia (in Russia alone, 7.5 and 14.5 million hectares burnt in 2002 and 2003, respectively).
  • While few countries report an overall change in boreal forest extent, the degree of fragmentation and ‘quality’ is declining – only about 40 % of the total forested area is considered ‘intact’ (defined here as areas ≥ 500 km2, internally undivided by things such as roads, and with linear dimensions ≥ 10 km).
  • Russian boreal forest is the most degraded and least ‘intact’, and has suffered the greatest decline in the last few decades compared to other boreal countries.
  • Boreal countries have only < 10 % of their forests protected from wood exploitation, except Sweden where it’s about 20 %.
  • There are over 20000 species described in the boreal forest – a number much less than that estimated for tropical forests even of much smaller size.
  • 94 % of the 348 IUCN Red Listed boreal species are considered to be threatened with extinction, but other estimates from local assessments compiled together in 2000 (the United Nations’ Temperate and Boreal Forest Resources Assessment) place the percentages of threatened species up to 46 % for some taxa in some countries (e.g., mosses in Sweden). The latter assessment placed the Fennoscandian countries as having the highest proportions of at-risk taxa (ferns, mosses, lichens, vascular plants, butterflies, birds, mammals and ‘other vertebrates’), with Sweden having the highest proportion in almost all categories.
  • Boreal forest ecosystems contain about 30 % of the terrestrial carbon stored on Earth (~ 550 Gigatonnes).
  • © BC Ministry For Range/L. Maclaughlan

    Warmer temperatures have predisposed coniferous forest in western Canada to a severe outbreak of mountain pine beetle (Dendroctonus ponderosae) extending over > 13 M ha. © BC Ministry For Range/L. Maclaughlan

  • Mass insect outbreaks killing millions of trees across the entire boreal region are on the rise.
  • Although considered in the past as a global carbon sink, recent disturbances (e.g., increasing fire and insect outbreak) and refinements of measurement mean that much of the area is probably a carbon source (at least, temporarily).
  • A single insect outbreak in western Canada earlier this decade thought to be the direct result of a warming planet contributed more carbon to the atmosphere than all of that country’s transport industry and fire-caused release combined.
  • Current timber harvest management is inadequately prepared to emulate natural fire regimes and account for shifting fire patterns with climate change.
  • No amount of timber management can offset the damage done by increasing fire – we must manage fire better to have any chance of saving the boreal forest as a carbon sink and biodiversity haven.

Those include the main take-home messages. I invite you to read the paper in full and contact us (the authors) if you have any questions.

CJA Bradshaw

Full reference: Bradshaw, CJA, IG Warkentin, NS Sodhi. 2009. Urgent preservation of boreal carbon stocks and biodiversity. Trends in Ecology and Evolution DOI: 10.1016/j.tree.2009.03.019

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Few people, many threats – Australia’s biodiversity shame

31 07 2009

bridled_nailtail_400I bang on a bit about human over-population and how it drives biodiversity extinctions. Yet, it isn’t always hordes of hungry humans descending on the hapless species of this planet  – Australia is a big place, but has few people (just over 20 million), yet it has one of the higher extinction rates in the world. Yes, most of the country is covered in some fairly hard-core desert and most people live in or near the areas containing the most species, but we have an appalling extinction record all the same.

A paper that came out recently in Conservation Biology and was covered a little in the media last week gives some telling figures for the Oceania region, and more importantly, explains that we have more than enough information now to implement sound, evidence-based policy to right the wrongs of the past and the present. Using IUCN Red List data, Michael Kingsford and colleagues (paper entitled Major conservation policy issues for biodiversity in Oceania), showed that of the 370 assessed species in Australia, 80 % of the threatened ones are listed because of habitat loss, 40 % from invasive species and 30 % from pollution. As we know well, it’s mainly habitat loss we have to control if we want to change things around for the better (see previous relevant posts here, here & here).

Kingsford and colleagues proceed to give a good set of policy recommendations for each of the drivers identified:

Habitat loss and degradation

  • Implement legislation, education, and community outreach to stop or reduce land clearing, mining, and unsustainable logging through education, incentives, and compensation for landowners that will encourage private conservation
  • Establish new protected areas for habitats that are absent or poorly represented
  • In threatened ecosystems (e.g., wetlands), establish large-scale restoration projects with local communities that incorporate conservation and connectivity
  • Establish transparent and evidence-based state of environment reporting on biodiversity and manage threats within and outside protected areas.
  • Protect free-flowing river systems (largely unregulated by dams, levees, and diversions) within the framework of the entire river basin and increase environmental flows on regulated rivers

Invasive species

  • Avoid deliberate introduction of exotic species, unless suitable analyses of benefits outweigh risk-weighted costs
  • Implement control of invasive species by assessing effectiveness of control programs and determining invasion potential
  • Establish regulations and enforcement for exchange or treatment of ocean ballast and regularly implement antifouling procedures

Climate change

  • Reduce global greenhouse gas emissions
  • Identify, assess, and protect important climate refugia
  • Ameliorate the impacts of climate change through strategic management of other threatening processes
  • Develop strategic plans for priority translocations and implement when needed

Overexploitation

  • Implement restrictions on harvest of overexploited species to maintain sustainability
  • Implement an ecosystem-based approach for fisheries, based on scientific data, that includes zoning the ocean; banning destructive fishing; adopting precautionary fishing principles that include size limits, quotas, and regulation with sufficient resources based on scientific assessments of stocks and; reducing bycatch through regulation and education
  • Implement international mechanisms to increase sustainability of fisheries by supporting international treaties for fisheries protection in the high seas; avoiding perverse subsidies and improve labelling of sustainable fisheries; and licensing exports of aquarium fish
  • Control unsustainable illegal logging and wildlife harvesting through local incentives and cessation of international trade

Pollution

  • Decrease pollution through incentives and education; reduce and improve treatment of domestic, industrial, and agriculture waste; and rehabilitate polluted areas
  • Strengthen government regulations to stop generation of toxic material from mining efforts that affects freshwater and marine environments
  • Establish legislation and regulations and financial bonds (international) to reinforce polluter-pays principles
  • Establish regulations, education programs, clean ups, labelling, and use of biodegradable packaging to reduce discarded fishing gear and plastics

Disease

  • Establish early-detection programs for pathological diseases and biosecurity controls to reduce translocation
  • Identify causes, risk-assessment methods, and preventative methods for diseases
  • Establish remote communities of organisms (captive) not exposed to disease in severe outbreaks

Implementation

  • Establish regional population policies based on ecologically sustainable human population levels and consumption
  • Ensure that all developments affecting the environment are adequately analysed for impacts over the long term
  • Promote economic and societal benefits from conservation through education
  • Determine biodiversity status and trends with indicators that diagnose and manage declines
  • Invest in taxonomic understanding and provision of resources (scientific and conservation) to increase capacity for conservation
  • Increase the capacity of government conservation agencies
  • Focus efforts of nongovernmental organisations on small island states on building indigenous capacity for conservation
  • Base conservation on risk assessment and decision support
  • Establish the effectiveness of conservation instruments (national and international) and their implementation

A very good set of recommendations that I hope we can continue to develop within our governments.

CJA Bradshaw

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Woodland Recovery Initiative

12 03 2009

golden wattle (Acacia pycnantha)I’m recommending you view a video presentation (can be accessed by clicking the link below) by A/Prof. David Paton which demonstrates the urgency of reforesting the region around Adelaide. Glenthorne is a 208-ha property 17 km south of the Adelaide’s central business district owned and operated by the University of Adelaide. A major revegetation project called the Woodland Recovery Initative is being organised to achieve the following:

  • reclaim approximately 100 ha of farmland and reconstruct a suitable habitat that encourages the return of native species
  • establish a world-class research centre
  • employ scientists, technicians, teachers and managers to deliver research, educational, community engagement, monitoring and on-ground works
  • develop educational programs that involve local schools in the environmental works, so that young South Australians are engaged in the project and see it as important to the future of their community

In my view, this is a really exciting opportunity to test experimentally the best ways to restore woodlands to maximise biodiversity retention. Once revegetated, the Glenthorne property will link existing reserves to maximise forested area (and as we know, increasing habitat area is one of most effective ways to prevent extinction). The next step is to apply the knowledge gained from the long-term experimentation at Glenthorne to revegetate the regions surrounding Adelaide that have suffered 200 years of heavy deforestation.

I strongly encourage local support of this initiative – it’s not only biodiversity that will benefit – ecosystem services on which the human residents of the greater Adelaide region depend (including extremely important things such as water retention and carbon sequestration) will also be efficiently enhanced by evidence-based ecological restoration of the region. We could certainly use better natural water retention and more carbon sequestration in addition to the re-establishment of many extirpated native species!

VIEW VIDEO BY CLICKING HERE

CJA Bradshaw





Tropical Turmoil II

8 03 2009

In August last year I covered a paper my colleagues (Navjot Sodhi and Barry Brook) and I had in press in Frontiers in Ecology and the Environment entitled Tropical turmoil – a biodiversity tragedy in progress. The paper is now available in the March 2009 issue of the journal (click here to access). We were also fortunate enough to grab the front cover (shown here) and have a dedicated podcast that you can listen to by clicking here about the paper and its findings. I encourage ConservationBytes.com readers to have a listen if they’re interested in learning more about the woeful state of tropical biotas worldwide, and maybe some ways to rectify the problems. The intro to the podcast can be viewed by clicking here.

CJA Bradshaw





Cartoon guide to biodiversity loss

30 01 2009

I’m taking Barry Brook‘s great idea on the Cartoon Guide to Global Warming Denial and applying it to biodiversity and habitat loss.

There are a lot of these sorts of things out there (amazing how we laugh at tragedy), so I will probably do subsequent posts as I find good candidates (suggestions welcome).

ucs-cartoonearthbin

CJA Bradshaw

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Measuring the amphibian meltdown

9 01 2009

melting_frog_by_zarinstar.pngA paper my colleagues and I published earlier last year in the open-access journal PLoS One describes one of the largest databases of amphibian threat risk ever compiled. Our main aims were to determine which factors drive amphibians toward extinction – this being especially topical considering that amphibians epitomise the modern biodiversity crisis: major population declines, disease outbreaks, deformities and recent confirmed extinctions dominate the biodiversity news. 32 % of all amphibians worldwide are threatened with extinction, 43 % of described species are declining, and about 160 species have already gone extinct in the last few decades.

In our paper (Sodhi and colleagues) entitled Measuring the meltdown: drivers of global amphibian extinction and decline, we found that the range size occupied by a species was overwhelmingly the principal driver of threat risk. This means that although other factors are involved, the number one (by far and away) thing threatening amphibians is habitat loss – everything else is minor by comparison.

Of course, we shouldn’t ignore other issues – increasing climate seasonality (temperature and precipitation) also contributed to higher threat risk. This is exactly the sort of thing that is predicted to increase with climate change (more variable weather patterns). In many cases, it’s the variability that’s worse than the mean trend when it comes to biodiversity.

So what should we do? Our results suggest that areas containing high numbers of restricted-range amphibians should have conservation priority. Although captive breeding might help to buffer some declining populations in the short term, such interventions cannot substitute for habitat protection and restoration. The synergies between ecological/life history traits and environmental conditions demonstrate how management must address each of the major drivers of decline together for any success – there is no magic bullet to prevent extinctions. We also recommend that substantial increases in international research on the long-term monitoring of amphibian populations is required to mitigate effectively the current meltdown of amphibian biodiversity.

CJA Bradshaw

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Addressing biodiversity decline at home

30 11 2008

© CJA Bradshaw

© CJA Bradshaw

I was recently invited to sit on a panel organised by the Conservation Council of South Australia (CCSA) to discuss issues of marine and coastal conservation under a rapidly changing climate. The results of that will be released soon (I’ll blog about that later), but in the interim, I want to highlight to readers of ConservationBytes.com how the CCSA is setting up the challenge to local governments to implement positive steps forward for the conservation of biodiversity in South Australia. I’m reproducing the executive summary of their Summit Report on Biodiversity in a Changing Climate (download full report here). It’s a good example of how we can all (industry, government, academia) work together to promote our own well-being.

…South Australia’s biodiversity is declining at an alarming rate. It has been suggested by scientists that it will take many millions of years for biodiversity to recover from the impacts of humans over the last 200 years. In South Australia the key threat to biodiversity is land clearance; clearance of remnant native vegetation and subsequent fragmentation of habitat for native fauna species. Other key threats to biodiversity in South Australia include:

  • Habitat fragmentation from development
  • Competition from introduced flora
  • Predation by introduced animals
  • Direct competition for food, shelter and resources from introduced fauna
  • Introduced diseases
  • Collection of firewood from remnant vegetation
  • Altered fire regimes
  • Inappropriate grazing/overgrazing
  • Inappropriate management activities
  • Water extraction/pollution
  • Climate change – including increasing oceanic temperatures and acidification

Much of South Australia’s economy is based on the use of biological resources and the need to maintain ecosystem services. This includes activities such as tourism and recreation, nature conservation, pastoralism, agriculture, horticulture, and forestry which all benefit from healthy ecosystems.

Our primary production systems require biodiversity for pest control/management, soil conservation, enhanced productivity and stabilisation, pollination, salinity amelioration, and water purification.

To address and reverse current biodiversity trends our society must recognise, understand and value biodiversity. Land managers, indigenous communities, local industries, government and the broader community may value biodiversity in different ways, however conservation and effective management of biodiversity is essential to ensure the continuation of these values for future generations. Biodiversity values may include:

  • Production value for the provision of food, medicines, clothing and building materials consumed by society
  • Ecosystem services for the maintenance of ecosystem services (natural storing and cycling of nutrients, stabilising soil formation, protection of water resources and breakdown of pollution), and maintenance of biodiversity
  • Socio-economic value for recreation, research, education and monitoring, and cultural values
  • Future value to maintain the capacity to identify future direct or indirect utilitarian value

The South Australian government has recognised the significance of biodiversity through integrated approaches such as the National Strategy for the Conservation of Australia’s Biological Diversity, a joint initiative of the Commonwealth and State and Territory governments. This strategy supports other intergovernmental agreements, such as the National Strategy for Ecologically Sustainable Development, the National Greenhouse Strategy, the National Forest Policy Statement, the Decade of Landcare Plan, the Wetlands Policy of the Commonwealth Government of Australia, the Inter-Governmental Agreement on the Environment, the Natural Heritage Trust Partnership Agreements and the National Framework for the Management and Monitoring of Australia’s Native Vegetation.

The South Australian government has also implemented its own biodiversity focused strategies including No Species Loss, NatureLinks, Tackling Climate Change, and the State Strategic Plan. Regional biodiversity plans are being facilitated to assist in the management and rehabilitation of natural habitats throughout regions of the state.

However, despite the government’s recognition of biodiversity as a serious issue, South Australia’s biodiversity continues to decline at an alarming rate. Actions for conservation, management and awareness raising must be backed by political will and be targeted and supported financially.

Investing in biodiversity is essential to maintaining ecosystems services and in turn to provide dividends to human health and wellbeing. Policies and regulations must ensure all stakeholders are accountable for their environmental footprint and role in implementing change for the future protection of our state’s biodiversity. The aim of this report is to provide policy recommendations to increase the effectiveness of biodiversity conservation in South Australia’s changing climate…

to view the Report’s recommendations, read on… Read the rest of this entry »





More greenwashing from the Malaysian oil palm industry

17 11 2008

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© ?

A recent article from Mongabay.com. What the good doctor Basiron appears to gloss over rather well is that his own country’s very economic future, well-being of its citizenry and long-term sustainability absolutely depends on maintaining large tracts of intact primary forest. The value of its forests far outweighs the short-term ‘development’ gains from palm oil. The backflips, greenwashing and overt profiteering will only be a blip in Malaysia’s economic development, so keep on with the propaganda while you can, Basiron. Why don’t you call a spade a spade – it’s greed, not so-called ‘development’ that’s raping your own country.

Dr. Yusof Basiron, the controversial CEO of the Malaysian Palm Oil Council (MPOC), blogs about the sustainability of palm oil.

Scientists should compare the biodiversity oil palm plantations to other industrial monocultures, not the rainforests they replace, said Dr. Yusof Basiron, CEO of the Malaysian Palm Oil Council (MPOC), in a post on his blog.

“I would also like to encourage environmental scientists not to compare the biodiversity of an agricultural crop such as the oil palm with that of rain forests,” he wrote. “The findings would not win you a Nobel price [sic].”

“If a comparison is to be made, the biodiversity of the oil palm, an agricultural crop, should be compared with that for soyabean or rapeseed, corn or sugarcane or other agricultural crops,” he continued. “Biodiversity that exists in the oil palm plantations is a bonus for all to benefit, while we enjoy the supply of oil for our food need, in addition to palm oil – an agricultural commodity – helping to promote economic growth not only in the developing countries but also in all other countries involved in using the product.”

Oil palm plantations and logged over forest in Malaysian Borneo. While much of the forest land converted for oil palm plantations in Malaysia has been logged or otherwise been zoned for logging, expansion at the expense of natural and protected forest does occur in the country. Reserve borders are sometimes redrawn to facilitate logging and conversion to plantations.
Basiron’s comments are noteworthy because until now he has maintained that oil palm plantations are “planted forests” rather than an industrial crop. Oil palm plantations are indeed biologically impoverished relative to even heavily logged forests – a study published earlier this year showed that oil palm plantations retain less than one-sixth the biodiversity of old growth forests and less than a quarter of that in secondary forests. However when compared with soy or rapeseed farms, which support almost no wildlife, oil palm plantations look a little less like biological deserts. Small measures – like maintaining and restoring forest cover along waterways, conserving peatlands and high value conservation areas, and reducing the use of fertilizers and pesticides – can help augment the biodiversity of existing plantations.

Basiron also noted that oil palm is the highest yielding conventional oilseed on the market – far outstripping the production per unit of area for rapeseed and soy. While its high yield makes oil palm exceedingly profitable – especially during the recent boom in palm oil prices, which recently ended, coinciding with falling oil prices – it also theoretically means that less land needs to be converted to produce the same amount of oil had the land been cultivated with other crops. The problem, say environmentalists, stems from the practice of clearing natural forest for oil palm plantations, which reduces biodiversity, hurts ecosystem functioning, and results in greenhouse gas emissions. While Basiron and the MPOC have flatly denied that natural forest has been cleared for the establishment of oil palm plantations, ground and satellite evidence proves the claims quite false. Nevertheless there are opportunities to covert degraded and abandoned agricultural lands for oil palm, mostly in Indonesia, rather than Malaysia where most land is already under cultivation or forested. While returns would be lower without the “logging subsidy” generated by selling the timber harvested from forest land prior to planting with oil palm, such plantations would face less criticism from the environmental community.

A third point made by Basiron is that Malaysia is a sovereign nation that has same rights to develop its economy as industrialized nations have had. The same concept has been put forth by Brazil over deforestation of the Amazon and China with regards to its rising greenhouse gas emissions.

Basiron writes,

“It is also unethical, immoral and somewhat patronizing for NGOs of the developed countries in Europe to ask developing countries such as Malaysia to stop developing its land. Asking Malaysia to stop developing its land will lead to conflicts and misunderstanding because some states in Malaysia have not yet had the opportunity to develop their agricultural land as they were until a few decades ago under oppressive colonial rule.”

“Sarawak [a state on the island of Borneo] which achieved independence from the British later than Peninsular Malaysia had only developed 8% of its land for agriculture compared to the UK which has over 70% of its land under agriculture. But there are still opportunities in Sarawak and other parts of Malaysia to develop degraded logged over land for planting rubber and oil palm to increase the country’s sources of foreign exchange while not involving the deforestation of the pristine permanent forests.”

While Basiron’s comments will likely be dismissed or ignored by many environmental groups, his points are not the sort that typically provoke outcry from the green lobby. MPOC lands in the most trouble with the environmental community when it attempts to deliberately mislead the marketplace on the environmental performance of palm oil, an approach the group has used repeatedly in recent years with advertising campaigns, “greenwashing” and “astroturfing” techniques, and other propaganda. Of course MPOC is not alone in using these tactics – it follows the model employed widely by industries ranging from U.S. ethanol producers to big oil. The problem for MPOC – and other industries – is that misleading campaigns are only providing more fodder for its enemies. But MPOC is hedging itself. The palm oil marketing group is also employing a second strategy that may pay better dividends in the long run – an effort to improve the environmental performance of palm oil. While the initiative – known as the Roundtable on Sustainable Palm Oil (RSPO) – has stumbled a bit coming out of the blocks, it appears there may be a market for certified palm oil, which would offer producers a premium for mitigating the environmental and social impacts of producing the vegetable oil. The first RSPO-certified palm oil is expected the reach Europe today. Unilever, one of the world’s largest consumers of palm oil, has already pledged to buy only certified palm oil by 2015.

See also previous posts on oil palm at ConservationBytes.com:

Unexpected benefits of falling palm oil prices

Oil palm plantatations destroying tropical biodiversity

Another nail in Borneo’s biodiversity coffin