Potential impacts of climate change on the environmental services of humid tropical alpine regions
Article first published online: 17 AUG 2010
© 2010 Blackwell Publishing Ltd
Global Ecology and Biogeography
Volume 20, Issue 1, pages 19–33, January 2011
How to Cite
Buytaert, W., Cuesta-Camacho, F. and Tobón, C. (2011), Potential impacts of climate change on the environmental services of humid tropical alpine regions. Global Ecology and Biogeography, 20: 19–33. doi: 10.1111/j.1466-8238.2010.00585.x
- Issue published online: 8 DEC 2010
- Article first published online: 17 AUG 2010
- climate change;
- ecosystem services;
- soil properties;
- Tropical alpine regions
Aim Humid tropical alpine environments are crucial ecosystems that sustain biodiversity, biological processes, carbon storage and surface water provision. They are identified as one of the terrestrial ecosystems most vulnerable to global environmental change. Despite their vulnerability, and the importance for regional biodiversity conservation and socio-economic development, they are among the least studied and described ecosystems in the world. This paper reviews the state of knowledge about tropical alpine environments, and provides an integrated assessment of the potential threats of global climate change on the major ecosystem processes.
Location Humid tropical alpine regions occur between the upper forest line and the perennial snow border in the upper regions of the Andes, the Afroalpine belt and Indonesia and Papua New Guinea.
Results and main conclusions Climate change will displace ecosystem boundaries and strongly reduce the total area of tropical alpine regions. Displacement and increased isolation of the remaining patches will induce species extinction and biodiversity loss. Drier and warmer soil conditions will cause a faster organic carbon turnover, decreasing the below-ground organic carbon storage. Since most of the organic carbon is currently stored in the soils, it is unlikely that an increase in above-ground biomass will be able to offset soil carbon loss at an ecosystem level. Therefore a net release of carbon to the atmosphere is expected. Changes in precipitation patterns, increased evapotranspiration and alterations of the soil properties will have a major impact on water supply. Many regions are in danger of a significantly reduced or less reliable stream flow. The magnitude and even the trend of most of these effects depend strongly on local climatic, hydrological and ecological conditions. The extreme spatial gradients in these conditions put the sustainability of ecosystem management at risk.