Climate change and elevated CO<sub>2</sub> favor forest over savanna under different future scenarios in South Asia

نویسندگان

چکیده

Abstract. South Asian vegetation provides essential ecosystem services to the 1.7 billion inhabitants living in region. However, biodiversity and are threatened by climate land-use change. Understanding assessing how ecosystems respond simultaneous increases atmospheric CO2 future change is of vital importance avoid undesired Failed reaction increasing will likely have severe consequences for humankind. Here, we used adaptive dynamic global model version 2 (aDGVM2) simulate dynamics Asia under RCP4.5 RCP8.5, explored presence or absence fertilization influences responses Simulated both representative concentration pathways (RCPs) without effects showed a decrease tree dominance biomass, whereas simulations with an increase canopy cover, height biome-specific evapotranspiration end 21st century. The predicted changes aboveground biomass cover triggered transition towards tree-dominated biomes. We found that savanna regions at high risk woody encroachment transitioning into forest. also transitions deciduous forest evergreen mountain regions. Vegetation types using C3 photosynthetic pathway were not saturated current concentrations, simulated strong effect rising CO2. Hence, region has potential remain carbon sink. Projections bioclimatic envelopes biomes need adjustments account shifts caused elevated results our study help understand regional climate–vegetation interactions can support development strategies preserve

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ژورنال

عنوان ژورنال: Biogeosciences

سال: 2021

ISSN: ['1726-4189', '1726-4170']

DOI: https://doi.org/10.5194/bg-18-2957-2021