An Assessment Framework for Grassland Ecosystem Health with Consideration of Natural Succession: A Case Study in Bayinxile, China
An Assessment Framework for Grassland Ecosystem Health with Consideration of Natural Succession: A Case Study in Bayinxile, China
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DOI：
10.3390/su11041096
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发表时间：
2019-02
期刊：
影响因子：
3.9
通讯作者：
Nitu Wu;Aijun Liu;Yongfang Wang;L. Li;Lumeng Chao;Guixiang Liu
中科院分区：
文献类型：
--
作者：
Nitu Wu;Aijun Liu;Yongfang Wang;L. Li;Lumeng Chao;Guixiang Liu
草地健康评价是制定草地保护政策的依据。然而，对于人类活动过度的北方区域天然草地，从自然演替角度进行评价的方法还很少。本研究的主要目的是从自然演替的角度建立一个评估系统。此外，利用最小累积阻力模型提取研究区潜在生态信息，作为评价结果的补充参考。对位于我国北方、人类活动频繁的典型半干旱草原--巴音希勒草原的生态功能研究结果表明：（1）东部丘陵区的生态功能较好，西部丘陵区的生态功能总体上较低。(2)河流是整个草原最重要的生态网络，在阻止退化演替和连接生态群落方面具有重要意义。(3)草地生态网络密度与人类活动强度密切相关，农田和道路对草地生态网络的连接有较大的负面影响。在此基础上，提出了巴音希勒草原生态治理区的划分和建议。该研究为草地健康评价和区域草地可持续发展提供了新的视角。
Grassland health assessment is the basis for formulating grassland protection policy. However, there are few assessment methods that consider the angle of natural succession for northern China’s regional native grassland with excessive human activities. The main purpose of this study is to build an assessment system for these areas from the perspective of natural succession. Besides, the minimal cumulative resistance (MCR) model was used to extract potential ecological information from the study area as a supplementary reference for the assessment results. The result for Bayinxile pasture, a typical semiarid steppe with excessive human activities located in northern China, showed that: (1) The ecological function of eastern hilly area was better than that of other regions and the western area was lowest as a whole. (2) The river was the most important ecological network in the whole grassland in that it was of vital significance in the prevention of retrogressive succession and in the linking of ecological communities. (3) The density of ecological network was closely related to the intensity of human activities, and farmland and roads had great negative influence on the connection of the grassland ecological network. We further proposed an ecological control zone and made suggestions for Bayinxile ecological management to prevent grassland degradation based on the above results. This study should provide a new perspective for grassland health assessment and sustainable development of regional grassland.