Modelling the potential distribution of endangered Prunus africana (Hook.f.) Kalkm. in East Africa

Publication Type

Journal contribution (peer reviewed)

Authors

Mbatudde, M., Mwanjololo, M., Kakudidi, E.K. & Dalitz, H.

Year of publication

2012

Published in

African Journal of Ecology, Vol 50, Iss 4

DOI

10.1111/j.1365-2028.2012.01327.x

Continued harvesting and climate change are affecting the distributions of many plant species and may lead to numerous extinctions over the next century. Endangered species are likely to be a special concern, but the extent to which they are sensitive to climate is currently unclear. Species distribution modelling, if carefully implemented, can be used to assess climate sensitivity and potential climate change impacts, of tree species. We used MaxEnt algorithm for species distribution modelling to assess the potential distribution and climate change risks for a threatened Prunus africana, in East Africa. Data from different herbaria on its distribution were linked to data on climate to test hypotheses on the factors determining its distribution. Predictive models were developed and projected onto a climate scenario for 2050 to assess climate change risks. Precipitation of driest quarter and annual precipitation appeared to be the main factors influencing its distribution. Climate change was predicted to result in reductions of the species' habitats (e.g. Erasmus et al., Glob. Change Biol. 2002; 8: 679). Prunus africana distribution is thus highly vulnerable to a warming climate and highlights the fact that both in-situ and ex-situ conservation will be a solution to global warming. © 2012 Blackwell Publishing Ltd.