Primate woes where the oil palm grows

16 08 2018

gorilla

A new article just published in PNAS reveals how future expansion of the palm-oil industry could have terrible consequences for African primates.

Researchers from the European Commission’s Joint Research Centre, CIRAD, Liverpool John Moores University, and ETH Zurich searched for “areas of compromise” combining high oil palm suitability with low primate vulnerability, as possible locations where to accommodate new oil-palm plantations while reducing detrimental effects on primate populations.

Results show that there is small room for compromise. In fact, potential areas of compromise are rare across the whole African continent, covering a total extent of 0.13 Mha of land highly suited to oil palm cultivation where primate vulnerability is low, rising to just 3.3 Mha if all land with at least minimum suitability to grow oil palm is taken into account.

Palm oil production is steadily rising, and expected to accelerate in response to growing world’s population, with future demand driven not only by the food industry, but also by the biofuel market. Read the rest of this entry »





Some scary stats about agriculture and biodiversity

20 07 2018

84438Last week we had the pleasure of welcoming the eminent sustainability scientist, Professor Andrew Balmford of the University of Cambridge, to our humble Ecology and Evolution Seminar Series here at Flinders University. While we couldn’t record the seminar he gave because of some of the unpublished and non-proprietary nature of some of his slides, I thought it would be interesting, useful, and thought-provoking to summarise some of the information he gave.

Andrew started off by telling us some of the environmental implications of farming worldwide. Today, existing agriculture covers more than half of ‘useable’ land (i.e., excluding unproductive deserts, etc.), and it has doubled nitrogen fixation rates from a pre-industrial baseline. Globally, agriculture is responsible for between 19 and 35% of all greenhouse gas emissions, and it has caused approximately 40% increase in observed sea-level rise (1961-2003). Not surprisingly, agriculture already occupies the regions of highest biodiversity globally, and is subsequently the greatest source of threat to species.

Read the rest of this entry »





How to feed the world without costing the Earth

5 07 2018

image_normalI’m excited to announce the upcoming public lecture by world-renowned sustainability scientist, Professor Andrew Balmford, at Flinders University on 17 July 2018.

Andrew is Professor of Conservation Science and a Royal Society Wolfson Research Merit Award holder at the Department of Zoology, University of Cambridge, and is on sabbatical at University of Tasmania until December 2018. His main research interests are exploring how conservation might best be reconciled with land-demanding activities such as farming, quantifying the costs and benefits of effective conservation, and examining what works in conservation. In his book Wild Hope (Chicago University Press), he argues that cautious optimism is essential in tackling environmental challenges. Andrew helped establish the Student Conference on Conservation Science, and Earth Optimism.

EcolEvolFlindersLogoProfessor Balmford will be presenting his seminar “How to feed the world without costing the Earth” (hosted by the Ecology & Evolution Research Group) at the Bedford Park Campus of Flinders University in South Lecture Theatre 1, from 12:00-13:00 on 17 July 2018. All are welcome.

Abstract: Globally, agriculture is the greatest threat to biodiversity and a major contributor to anthropogenic greenhouse gas emissions. How we choose to deal with rising human food demand will to a large degree determine the state of biodiversity and the wider environment in the 21st century. Read the rest of this entry »





Inexorable rise of human population pressures in Africa

31 08 2016
© Nick Brandt

© Nick Brandt

I’ve been a bit mad preparing for an upcoming conference, so I haven’t had a lot of time lately to blog about interesting developments in the conservation world. However, it struck me today that my preparations provide ideal material for a post about the future of Africa’s biodiversity.

I’ve been lucky enough to be invited to the University of Pretoria Mammal Research Unit‘s 50th Anniversary Celebration conference to be held from 12-16 September this year in Kruger National Park. Not only will this be my first time to Africa (I know — it has taken me far too long), the conference will itself be in one of the world’s best-known protected areas.

While decidedly fortunate to be invited, I am a bit intimidated by the line-up of big brains that will be attending, and of the fact that I know next to bugger all about African mammals (in a conservation science sense, of course). Still, apparently my insight as an outsider and ‘global’ thinker might be useful, so I’ve been hard at it the last few weeks planning my talk and doing some rather interesting analyses. I want to share some of these with you now beforehand, although I won’t likely give away the big prize until after I return to Australia.

I’ve been asked to talk about human population pressures on (southern) African mammal species, which might seem simple enough until you start to delve into the complexities of just how human populations affect wildlife. It’s simply from the perspective that human changes to the environment (e.g., deforestation, agricultural expansion, hunting, climate change, etc.) do cause species to dwindle and become extinct faster than they otherwise would (hence the entire field of conservation science). However, it’s another thing entirely to attempt to predict what might happen decades or centuries down the track. Read the rest of this entry »





Buying time

27 06 2016

farmOriginally published in the Otago Daily Times by Tom McKinlay

If we don’t act soon, the world we leave our children will be in a sorry state indeed, leading Australian scientist Prof Corey Bradshaw tells Tom McKinlay.

Prof Corey Bradshaw’s 9-year-old daughter lives what sounds an idyllic existence. On their small farm outside Adelaide in South Australia, she has her chickens and her dogs and her cats, her goats and her sheep.

She’s an only child, but is not short of attention from adults and reads voraciously.

She has big plans; there are at least 25 careers she likes the look of, that she’ll undertake simultaneously: farmer, wildlife rescuer, self-sufficient bush dweller – feeding herself by shooting arrows at fish – scientist and more.

She is optimistic about the future. As she should be. A 9-year-old girl living in Australia in 2016 should regard the sky as no limit at all.

All this I learn from her father, ecologist Prof Bradshaw, who talks of his daughter with an enthusiasm unbounded.

It is fair to assume she has picked up some of her interest in the natural world from him.

He holds the Sir Hubert Wilkins Chair of Climate Change in the School of Biological Sciences at the University of Adelaide.

And the ecologist, conservation biologist and systems modeller – with a University of Otago degree – has shared a great deal of his work with his daughter.

“She’s very much a farm kid, but because of who I am she gets to hear a lot about animal and plant systems around the world, and she’s travelled a lot with me and she’s a complete fanatic of David Attenborough,” the professor says.

So far, still so idyllic. But Prof Bradshaw’s work means he is at the forefront of alerting the world to what is not right with it.

Pollution, climate change, habitat loss, extinction.

His daughter has travelled with him to see species that might not be with us by the time she grows up.

“She’s hyper-aware of extinctions, in particular, and how climate change is contributing to that,” Prof Bradshaw says.

“I don’t pull any punches with her.”

In fact, he made her cry when she was 5 explaining climate change. She hasn’t needed to travel to know the pot is on the boil. Fires have forced the family to flee its South Australian property several times, not just at the height of summer.

One of the worst fires in the region struck in May a couple of years back.

“We were on the doorstep of winter and we had one of our worst fires in 20 years.”

So even without a scientist in the family, there are certain unavoidable truths for a child growing up in 21st-century Australia.

Prof Bradshaw is coming to Dunedin next month as part of the New Zealand International Science Festival to talk on climate change, looking at it from his daughter’s perspective. Read the rest of this entry »





Australia pisses away the little water it has

9 05 2016

cow_drinking_australia_dryWater, water nowhere, with little left to drink.

Australians are superlative natural resource wasters, but living in the driest inhabited continent on the planet, you’d think we’d be precious about our water use.

You’d be wrong.

On the contrary, Australia has a huge water footprint (defined as “the total volume of freshwater that is used to produce the goods and services consumed by the people of the nation”). For internal domestic use (i.e., not including agricultural and industrial uses, or water imported directly or within other goods), Australians use about 341000 litres per person per year (data from 1997–2001), which is six times the global average of 57000 litres per person per year (1).

Agricultural production is one of the chief consumers of freshwater around the world. For example, the global average virtual water content of rice (paddy) is 2.29 million litres/tonne produced, and for wheat it is 1.33 litres/tonne. Growing crops for biofuel in particular has a huge water footprint — depending on the crop in question, it takes an average of 1400–20000 litres of water to produce just one litre of biofuel (2). If an agricultural product comes from livestock — say, meat, leather, or wool — the water content is typically much higher because of the feed required to keep the animal alive. For example, it takes about three years to raise beef cattle to slaughtering age, with an average of 200 kg of boneless beef produced per animal. This requires about 1,300 kg of grains, 7200 kg of pasture or hay, and 31000 litres of water for drinking and cleaning. This means that the total amount of water required to produce 1 kg of beef is about 15340 litres (1). For Australia, which has over 20 million or so cattle at any one moment, the water footprint alone should at least be cause for concern the next time you tuck into a steak dinner. Read the rest of this entry »





To spare or to share, that is a muddled question

9 10 2015
Unfortunately, it ain't this simple (from doi:10.1016/j.foodpol.2010.11.008)

Unfortunately, it ain’t this simple (from doi:10.1016/j.foodpol.2010.11.008)

Certain research trends in any field are inevitable, because once a seductive can of research-question worms is opened, it’s difficult to resist the temptation to start hooking in. Of course, I’m not against popular trends in research per se if they lead to a productive, empirical evaluation of the complexities involved, but it can sometimes result in a lot of wasted time. For example, in conservation ecology we’ve had to suffer 15 years of wasted effort on disproving neutral theory, we’ve bashed heads unnecessarily regarding the infamous SLOSS (‘Single Large Or Several Small’ reserves) debates of the 1970s and 1980s, and we’ve pilfered precious years arguing about whether density feedback actually exists (answer: it does).

The latest populist research trend in conservation seems to be the ‘land sparing versus land sharing’ debate, which, I (and others) argue, is largely an overly simplistic waste of time, money and intellectual advancement to the detriment of both biodiversity and human well-being.

Land sparing is generally used in reference to agricultural practices (although in theory, it could apply to any human endeavour where native vegetation cover is required to be removed or degraded, such as for electricity production) that are purposely made to be high-yielding so that they require the smallest amount of land. At the other extreme (and the ‘two extremes’ of a continuum concept is half the bloody problem here), land sharing requires a larger land footprint because it relies on lower-yielding, biodiversity-friendly (agricultural) practices. Proponents of land sparing argue that only by amalgamating patches of remnant native vegetation can we avoid massive fragmentation and the pursuant loss of biodiversity, whereas those pushing for land sparing argue that the matrix between the big undeveloped bits must be exploited in a more biodiversity-friendly way to allow species to persist.

As it turns out, they’re both right (but their single-minded, extremist positions are not). Read the rest of this entry »