Variance estimate and taxonomic resolution: an analysis of macrobenthic spatial patterns at different scales in a Western Mediterranean coastal lagoon.
Variance estimate and taxonomic resolution: an analysis of macrobenthic spatial patterns at different scales in a Western Mediterranean coastal lagoon.
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DOI：
10.1016/j.marenvres.2009.02.003
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发表时间：
2009-05
影响因子：
3.3
通讯作者：
Mariella Tataranni;F. Maltagliati;A. Floris;Alberto Castelli;C. Lardicci
中科院分区：
文献类型：
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作者：
Mariella Tataranni;F. Maltagliati;A. Floris;Alberto Castelli;C. Lardicci
在地中海沿岸泻湖的四个空间尺度上研究了分类分辨率对大型底栖生物群落方差估计的影响。在各尺度上，其组合表现出显著差异；空间变异性主要与最小尺度和最大尺度有关。分类分辨率（从种到科）的降低与总体变异性的降低无关，使用物种和科分辨率水平获得的方差成分估计值相似。从物种丰度和科丰度得到的排序模型在区位和分散效应上都非常相似，但进一步聚集到类水平开始改变观测到的空间格局。在今后旨在评估泻湖变化的研究中，可以利用家庭一级降低成本所获得的资源来规划更频繁的调查和/或采用具有大量重复的复杂空间抽样设计。
The effects of taxonomic resolution on the variance estimates of macrobenthic assemblages were studied at four spatial scales in a Mediterranean coastal lagoon. The assemblages exhibited significant differences at all the investigated scales; however, spatial variability was mainly associated with the smallest and the largest scales. The decrease of taxonomic resolution (from species to family) was not related to a decrease of the overall variability and similar estimates of variance components were obtained using species and family resolution levels. The ordination models derived from species and family abundances were very similar both in terms of location and dispersion effect, while further aggregation to the class level began to alter the observed spatial patterns. In future studies aimed at assessing changes in the lagoon, resources derived from the cost reductions achieved using family level could be employed to plan more frequent surveys and/or to adopt complex spatial sampling designs with a high number of replicates.