不同管理制度下土壤生态系统的健壮性
Robustness of soil ecosystems under different regimes of management
摘要：
在这项研究中，三个土壤生态系统，不同类型的管理，已被比较，试图了解人类活动是否以及如何影响他们。相应的食物网的结构进行了分析，并通过使用一个动态模型计算其鲁棒性。关于拓扑结构，已经发现所有三个网络的结构都是小世界。此外，这三个网络都具有与食物网相同的分化性质。聚类系数的值，的连接性和复杂性，连同计算的鲁棒性表明，休耕牧场与低压管理的生态系统是更强大的比两个生态系统相关的有机农场受到中等强度的管理。如果这项研究所提出的证据得到进一步研究的证实，网络所显示的鲁棒性可能有助于从生态学角度评估生态系统所受农业做法的可持续性。
英文摘要：
In this study three soil ecosystems, that differ in the type of management, have been compared in the attempt to understand if and how anthropogenic action affects them. The structure of the corresponding food webs was analyzed and their robustness was calculated through the use of a dynamic model. With regard to the topology, it has been found that the structure of all three networks is small world. Furthermore, all three networks have a disassortative nature as expected for foodwebs. The values of the clustering coefficient, of the connectance and of the complexity, together with the calculation of the robustness suggest that the ecosystem related to a fallowed pastures with low pressure management is more robust than two ecosystems related to organic farms subject to middle intensity management. If the evidence suggested by this study was confirmed by further studies, the robustness shown by the networks could be useful for evaluating, from an ecological point of view, the sustainability of the agricultural practices to which the ecosystem is subject.
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