DETECTING TRENDS IN SPECIES COMPOSITION
DETECTING TRENDS IN SPECIES COMPOSITION
复制标题
检测物种组成的趋势
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
B. Taylor
中科院分区：
文献类型：
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作者：
T. Philippi;P. Dixon;B. Taylor
物种组成反映了一个遗址的环境和历史事件的结合；因此，物种组成的变化可以为环境中生态相关的变化提供敏感的衡量标准。在这里，我们考虑当多个地点随时间变化时的物种组成分析。
Species composition reflects a combination of environmental and historical events at a site; hence, changes in species composition can provide a sensitive measure of ecologically relevant changes in the environment. Here, we consider the analysis of species composition when multiple sites are followed through time.
Analyses of temporal trends in species composition either summarize species composition into a few metrics (indices or axis scores) or analyze the similarity among sites. We develop and illustrate the similarity approach. Each pair of samples represents a pair of replicates, a pair from the same site at different times, a pair from different sites at the same time, or an unrelated pair. Differences among times can be estimated by comparing average temporal dissimilarity to average replicate dissimilarity. Temporal trends can be described by one of three statistics that measure progressive change, the correlation of temporal dissimilarity with the length of time between samples. These methods are illustrated using data on changes in a South Carolina zooplankton assemblage following disturbance, and changes in bird species composition on Skokholm Island, Wales.
It is difficult to define and interpret temporal trends. Some definitions of interesting trends, like increasing divergence from another set of sample plots, place additional requirements on the sampling design. Including replicate samples or clustering sample plots and including “control” plots for comparison with sentinel sites would contribute to an understanding of changes in species composition.
DOI：
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发表时间：
1990
期刊：
Journal of Water Pollution Control Federation
影响因子：
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作者：
Terrence P. Boyle;Gary M. Smillie;Jana C. Anderson;D. Beeson
通讯作者：
Terrence P. Boyle;Gary M. Smillie;Jana C. Anderson;D. Beeson