Vulnerability of the Asian Typical Steppe to Grazing and Climate Change

The vulnerability of grassland vegetation in Inner Mongolia to climate change and grazing was examined using an ecosystem model. Grazing is an important form of land use in this region, yet there are uncertainties as to how it will be affected by climate change. A sensitivity analysis was conducted...

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Vydáno v:	Climatic change Ročník 63; číslo 3; s. 351 - 368
Hlavní autoři:	Christensen, Lindsey, Coughenour, Michael B., Ellis, James E., Chen, Zuo Zhong
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Dordrecht Springer 01.04.2004 Springer Nature B.V
Témata:	Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences Biomass Carbon dioxide Climate change Climatology. Bioclimatology. Climate change Earth, ocean, space Ecosystem models Ecosystems Exact sciences and technology External geophysics Factorial experiments Fundamental and applied biological sciences. Psychology Grasses Grasslands Grazing Humidity Land use Livestock Meteorology National parks Pasture management Plant growth Precipitation Primary production Radiation Sensitivity analysis Simulation Steppes Synecology Synergistic effect Systems stability Temperature Terrestrial ecosystems Vegetation Vegetation effects Asia Mongolia China Inner Mongolia China China, People's Rep., Inner Mongolia Terrestrial environment Grassland Sensitivity analysis Growth rate Carbon dioxide Vulnerability Vegetation dynamics Grazing Atmospheric temperature Steppe Ecosystem Greenhouse gas Environment impact Global change Numerical simulation Atmospheric precipitation Climate modification
ISSN:	0165-0009, 1573-1480
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Shrnutí:	The vulnerability of grassland vegetation in Inner Mongolia to climate change and grazing was examined using an ecosystem model. Grazing is an important form of land use in this region, yet there are uncertainties as to how it will be affected by climate change. A sensitivity analysis was conducted to study the effects of increased minimum and maximum temperatures, ambient and elevated CO2, increased or decreased precipitation, and grazing on vegetation production. Simulations showed that herbaceous above ground net primary production was most sensitive to changes in precipitation levels. Combinations of increased precipitation, temperature, and CO2 had synergistic effects on herbaceous production, however drastic increases in these climate scenarios left the system vulnerable to shifts from herbaceous to shrub-dominated vegetation when grazed. Reduced precipitation had a negative effect on vegetation growth rates, thus herbaceous growth was not sustainable with moderate grazing. Shifts in temporal biomass patterns due to changed climate have potentially significant implications for grazing management, which will need to be altered under changing climate to maintain system stability. [PUBLICATION ABSTRACT]
Bibliografie:	SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-2 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0165-0009 1573-1480
DOI:	10.1023/B:CLIM.0000018513.60904.fe