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首页> 外文期刊>Journal of Nematology, with Annual of Applied Nematology >Sentinel Nematodes of Land-Use Change and Restoration in Tallgrass Prairie
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Sentinel Nematodes of Land-Use Change and Restoration in Tallgrass Prairie

机译：高草草原土地利用变化与恢复的前哨线虫

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摘要

Changes in land use and the associated changes in land cover are recognized as the most important component of human-induced global change. Much attention has been focused on deforestation, but grasslands are among the most endangered ecosystems on Earth. The North American tallgrass prairie is a dramatic example, exhibiting a greater than 95% decline in historical area. Renewed interest in prairie conservation and restoration has highlighted the need for ecological indicators of disturbance and recovery in native systems, including the belowground component. The tallgrass prairie differs from the agricultural systems that have replaced it in having greater diversity and heterogeneity of resources, less physical soil disturbance (although other disturbances, such as fire and grazing, are prominent), and greater nitrogen limitation. Understanding the responses of nematode taxa to these characteristic differences is crucial to the development and improvement of community indices, but while knowledgeof disturbance responses by individual taxa is accumulating, the level of necessary taxonomic resolution remains in question. Although nematode communities generally are better described for temperate grasslands than for other natural ecosystems, identification of sentinel taxa is further confounded by high levels of diversity, and both spatial and temporal heterogeneity.
机译：土地用途的变化和相关的土地覆盖变化被认为是人类引起的全球变化的最重要组成部分。人们已经将很多注意力集中在森林砍伐上，但是草原是地球上最濒危的生态系统之一。北美高草草原就是一个很好的例子，历史面积下降幅度超过95％。对草原保护和恢复的新兴趣凸显了对包括地下部分在内的原生系统扰动和恢复的生态指标的需求。高草草原与替代高草草原的农业系统的不同之处在于，资源具有更大的多样性和异质性，对土壤的物理干扰较小（尽管其他干扰，例如火灾和放牧也很突出），并且对氮的限制更大。了解线虫对这些特征差异的反应对于社区指标的发展和改善至关重要，但是，尽管对各个分类群的干扰反应的了解不断积累，但必要的分类学解决方案的水平仍存在疑问。尽管通常在温带草原上比在其他自然生态系统上更好地描述线虫群落，但高水平的多样性以及时空异质性进一步混淆了前哨生物群的识别。

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