Changing climate and overgrazing are decimating Mongolian steppes.
Changing climate and overgrazing are decimating Mongolian steppes.
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DOI：
10.1371/journal.pone.0057599
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Saizen I
中科院分区：
文献类型：
--
作者：
Liu YY;Evans JP;McCabe MF;de Jeu RA;van Dijk AI;Dolman AJ;Saizen I
卫星观测表明，蒙古草原是全球生物量减少的热点地区，其减少程度可与热带雨林砍伐相媲美。为了保护或恢复这些草原，需要了解气候和人类活动对退化的相对贡献。本文利用最近开发的21年（1988-2008）卫星植被光学深度（VOD，植被含水量和地上生物量的代表）记录，表明蒙古几乎所有草原草原的VOD都显著减少。大约60%的VOD下降可以由降雨和地表温度的变化直接解释。在消除这些气候诱发的影响后，蒙古各地区的VOD残差仍然保持显著的下降趋势。空间格局和时间趋势的相关性表明，山羊密度的显著增加与相关的放牧压力和野火最有可能是草地退化背后的非气候因素。
Satellite observations identify the Mongolian steppes as a hotspot of global biomass reduction, the extent of which is comparable with tropical rainforest deforestation. To conserve or restore these grasslands, the relative contributions of climate and human activities to degradation need to be understood. Here we use a recently developed 21-year (1988–2008) record of satellite based vegetation optical depth (VOD, a proxy for vegetation water content and aboveground biomass), to show that nearly all steppe grasslands in Mongolia experienced significant decreases in VOD. Approximately 60% of the VOD declines can be directly explained by variations in rainfall and surface temperature. After removing these climate induced influences, a significant decreasing trend still persists in the VOD residuals across regions of Mongolia. Correlations in spatial patterns and temporal trends suggest that a marked increase in goat density with associated grazing pressures and wild fires are the most likely non-climatic factors behind grassland degradation.
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影响因子：
3.4
作者：
Karnieli, A;Bayasgalan, M;Tucker, CJ
通讯作者：
Tucker, CJ
DOI：
10.1002/joc.1181
发表时间：
2005-05-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Mitchell, TD;Jones, PD
通讯作者：
Jones, PD
影响因子：
8.2
作者：
Owe, M;de Jeu, R;Walker, J
通讯作者：
Walker, J
影响因子：
13.5
作者：
JACKSON, TJ;SCHMUGGE, TJ
通讯作者：
SCHMUGGE, TJ
影响因子：
6.4
作者：
Liu, Yi Y.;van Dijk, Albert I. J. M.;de Jeu, Richard A. M.
通讯作者：
de Jeu, Richard A. M.