Landscape-level thresholds and newt conservation
Landscape-level thresholds and newt conservation
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DOI：
10.1890/1051-0761(2007)017
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发表时间：
2007-01-01
影响因子：
5
通讯作者：
Ficetola, G. Francesco
中科院分区：
文献类型：
--
作者：
Denoel, Mathieu;Ficetola, G. Francesco
生态阈值被定义为从一种生态条件到另一种生态条件发生快速变化的点或区域。物种-生境关系中阈值的存在对管理有重要意义，但研究之间缺乏一致性和所用方法的广泛性使概括困难。我们使用了两种不同的统计方法来测试存在的阈值为个别物种和整个社会，使用三种蝾螈作为模型。基于371个池塘的样本，我们发现了景观配置和组成的显着阈值。研究了距林距离与高山Triturus alpestris和高山Triturus T.c. helveticus、森林和作物覆盖以及T.瑞士人。在本研究中观察到的不同物种的阈值的位置的变异性警告他们在社区一级的使用。今后的研究应以确定和评估目标物种的阈值为基础。生态圈可以是一个有用的概念，可以从中开发工具，集中保护受威胁的物种及其栖息地的努力。
Ecological thresholds are defined as points or zones at which a rapid change occurs from one ecological condition to another. The existence of thresholds in species - habitat relationships has important implications for management, but the lack of concordance across studies and the wide range of methods used make generalizations difficult. We used two different statistical methods to test for the existence of thresholds for both individual species and the whole community, using three newt species as models. Based on a sample of 371 ponds, we found significant thresholds for both landscape configuration and composition. These were for the relationships between distance to forest and occurrence of Triturus alpestris and T. helveticus, and forest and crop cover and T. helveticus. Variability in the location of thresholds observed for the different species in this study caution against their use at the community level. Future studies should be based on the identification and assessment of thresholds for targeted species. Thresholds can be a useful concept from which tools may be developed to focus conservation effort for threatened species and their habitats.