News Release

Research shows potential for zero-deforestation pledges to protect wildlife in oil palm

Peer-Reviewed Publication

University of Kent

New research has found that environmental efforts aimed at eliminating deforestation from oil palm production have the potential to benefit vulnerable tropical mammals.

These findings, published by Conservation Letters, were drawn from an international collaboration led by Dr Nicolas Deere from the University of Kent's Durrell Institute of Conservation and Ecology (DICE), and including the University of Melbourne, University of York, Universiti Malaysia Sabah, and South East Asia Rainforest Research Partnership.

In a promising development, the Roundtable on Sustainable Palm Oil (RSPO) has recently committed to zero-deforestation on plantations certified as sustainable, as a way to prohibit forest clearance during the development of new agricultural areas. This is achieved using the High Carbon Stock (HCS) Approach, a land-use planning tool that aims to protect patches of well-connected, high quality forest.

In their study of forest patches in Borneo Dr Deere and his colleagues found that those forests greater than 100 hectares, and afforded the highest conservation priority by High Carbon Stock protocols, supported larger populations of threatened species particularly sensitive to deforestation, such as sun bears and orang-utans.

Using camera-trap information, the size of the mammal population was greatest in larger and more connected forest patches. However, hunting and forest quality compromised the suitability of the patch for many species, indicating the importance of accounting for the impacts of human activities on wildlife in agricultural areas.

While the study highlights the potential for zero-deforestation approaches to contribute to wildlife conservation, the feasibility of protecting patches large enough to sustain sufficient numbers of species was called into question.

The study found that in the 100 hectares patches (the minimum criterion for high priority conservation status in HCS), only 35% of mammal species that would otherwise be present in continuous forest would be protected. In fact, patches would need to be 30 times larger to support the mammal community, and even larger if the effects of hunting were considered. Preserving forest patches of this size is simply unrealistic in most plantations.

Dr Deere said: 'The HCS protocols seem to work well in prioritising patches of wildlife-friendly forest within oil palm plantations, but it's not enough for many of the species we studied. A switch in emphasis towards joining up forest patches and managing them together across farmland landscapes would really help wildlife conservation in the long term.'


'Implications of zero-deforestation commitments: Forest quality and hunting pressure limit mammal persistence in fragmented tropical landscape' (Nicolas J Deere, Gurutzeta Guillera-Arroita, Philip J Platts, Simon L Mitchell, Esther L Baking, Henry Bernard, Jessica K Haysom, Glen Reynolds, Dave J I Seaman, Zoe G Davies, Matthew J Struebig) is published at

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The University of Kent is a leading UK university producing world-class research, rated internationally excellent and leading the way in many fields of study. Our 20,000 students are based at campuses and centres in Canterbury, Medway, Athens, Brussels, Paris, Rome and Tonbridge.

With 97% of our research judged to be of international quality in the most recent Research Assessment Framework (REF2014), our students study with some of the most influential thinkers in the world. Universities UK recently named research from the University as one of the UK's 100 Best Breakthroughs of the last century for its significant impact on people's everyday lives.

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