Anticipated climate and land-cover changes reveal refuge areas for Borneo's orang-utans

Struebig, Matthew J, Fischer, Manuela, Gaveau, David L A, Meijaard, Erik, Wich, Serge A, Gonner, Catherine, Sykes, Rachel, Wilting, Andreas and Kramer-Schadt, Stephanie (2015) Anticipated climate and land-cover changes reveal refuge areas for Borneo's orang-utans. Global Change Biology, 21 8: 2891-2904. doi:10.1111/gcb.12814


Author Struebig, Matthew J
Fischer, Manuela
Gaveau, David L A
Meijaard, Erik
Wich, Serge A
Gonner, Catherine
Sykes, Rachel
Wilting, Andreas
Kramer-Schadt, Stephanie
Title Anticipated climate and land-cover changes reveal refuge areas for Borneo's orang-utans
Journal name Global Change Biology   Check publisher's open access policy
ISSN 1365-2486
1354-1013
Publication date 2015-01-06
Year available 2015
Sub-type Article (original research)
DOI 10.1111/gcb.12814
Open Access Status
Volume 21
Issue 8
Start page 2891
End page 2904
Total pages 14
Place of publication Chichester, United Kingdom
Publisher Wiley-Blackwell Publishing Ltd
Collection year 2016
Language eng
Formatted abstract
Habitat loss and climate change pose a double jeopardy for many threatened taxa, making the identification of optimal habitat for the future a conservation priority. Using a case study of the endangered Bornean orang-utan, we identify environmental refuges by integrating bioclimatic models with projected deforestation and oil-palm agriculture suitability from the 1950s to 2080s. We coupled a maximum entropy algorithm with information on habitat needs to predict suitable habitat for the present day and 1950s. We then projected to the 2020s, 2050s and 2080s in models incorporating only land-cover change, climate change or both processes combined. For future climate, we incorporated projections from four model and emission scenario combinations. For future land cover, we developed spatial deforestation predictions from 10 years of satellite data. Refuges were delineated as suitable forested habitats identified by all models that were also unsuitable for oil palm – a major threat to tropical biodiversity. Our analyses indicate that in 2010 up to 260 000 km2 of Borneo was suitable habitat within the core orang-utan range; an 18–24% reduction since the 1950s. Land-cover models predicted further decline of 15–30% by the 2080s. Although habitat extent under future climate conditions varied among projections, there was majority consensus, particularly in north-eastern and western regions. Across projections habitat loss due to climate change alone averaged 63% by 2080, but 74% when also considering land-cover change. Refuge areas amounted to 2000–42 000 km2 depending on thresholds used, with 900–17 000 km2 outside the current species range. We demonstrate that efforts to halt deforestation could mediate some orang-utan habitat loss, but further decline of the most suitable areas is to be expected given projected changes to climate. Protected refuge areas could therefore become increasingly important for ongoing translocation efforts. We present an approach to help identify such areas for highly threatened species given environmental changes expected this century.
Keyword Assisted colonization
Biodiversity
Deforestation
Habitat suitability
Orangutan
South-East Asia
Species distribution modelling
Translocation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
 
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