Ecological Effects of Grazing in the Northern Tianshan Mountains
Ecological Effects of Grazing in the Northern Tianshan Mountains
复制标题
北天山放牧的生态效应
DOI：
10.3390/w9120932
复制
发表时间：
2017-11
期刊：
影响因子：
3.4
通讯作者：
Amuti Tureniguli
中科院分区：
文献类型：
--
作者：
Huang Xiaotao;Luo Geping;He Huili;Wang Xinxin;Amuti Tureniguli
确定放牧的影响对于干旱草原生态系统的养护、保护和可持续利用至关重要。然而，在干旱地区，特别是在区域尺度上，关于沿着山区海拔梯度放牧的生态影响的研究是有限的。利用Biome-BGC放牧模型，研究了沿着海拔梯度放牧对北方天山草地净初级生产力（NPP）、蒸散量（ET）和水分利用效率（WUE）的影响。放牧情景下的NPP、ET和WUE值普遍低于未放牧情景;放牧和未放牧情景之间的差异随着时间的推移呈增大趋势;这些差异存在明显的空间异质性。放牧情景下NPP和WUE的显著下降主要发生在高牲畜消费区。在高放牧强度的山区，由于蒸腾作用的减少和地表径流的增加，蒸散量的减少更大。该研究有助于更好地了解沿着海拔梯度放牧的生态效应，为科学管理天山北方草地生态系统提供数据支持。
Identifying the effects of grazing is critical for the conservation, protection and sustainable use of arid grassland ecosystems. However, research regarding the ecological effects of grazing along mountainous elevation gradients is limited in arid areas, particularly at the regional scale. Using the Biome-BGC grazing model, we explored the effects of grazing on grassland net primary productivity (NPP), evapotranspiration (ET) and water use efficiency (WUE) from 1979 to 2012 along an elevation gradient in the northern Tianshan Mountains. The NPP, ET and WUE values were generally lower under the grazing scenario than under the ungrazed scenario; the differences between the grazing and ungrazed scenarios showed increasing trends over time; and distinct spatial heterogeneity in these differences was observed. Distinct decreases in NPP and WUE under the grazing scenario mainly occurred in regions with high livestock consumption. The decrease in ET was greater in mountainous areas with high grazing intensity due to decreased transpiration and increased surface runoff. This study contributes to a better understanding of the ecological effects of grazing along an elevation gradient in the northern Tianshan Mountains and provides data to support the scientific management of grassland ecosystems.
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DOI：
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发表时间：
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期刊：
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影响因子：
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影响因子：
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