Mandelik Yael, Dayan Tamar, Chikatunov Vladimir, Kravchenko Vasiliy
Department of Entomology, the Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel.
Conserv Biol. 2007 Dec;21(6):1506-15. doi: 10.1111/j.1523-1739.2007.00823.x.
A promising shortcut for quantifying species patterns is to use genera and families as surrogates of species. At large spatial scales, concurrence between patterns of richness, rarity, and composition of species and higher taxa is generally high. Only a few researchers, however, have examined this relationship at the local scale, which is frequently the relevant scale in land-use conflicts. We investigated the reliability of the higher-taxon approach in assessing patterns of species richness, rarity, and composition at the local scale. We studied diversity patterns of three commonly used surrogate taxa: vascular plants, ground-dwelling beetles, and moths. We conducted year-round field surveys for these taxa in the Jerusalem Mountains and the Judean foothills, Israel. Richness and composition of species were highly correlated with richness and composition of genera for all taxa. At the family level, correlations with richness and composition of species were much lower. Excluding monotypic genera and families did not affect these relations. Rarity representation based on higher taxa varied considerably depending on the taxon, and rarity scale and was weaker compared with richness and composition representation. Cumulative richness curves of species and genera showed similar patterns, leveling off at equivalent sampling efforts. Genus-level assessments were a reliable surrogate for local patterns of species richness, rarity, and composition, but family-level assessments performed poorly. The advantage of using coarse taxonomic scales in local diversity surveys is that it may decrease identification time and the need for experts, but it will not reduce sampling effort.
一种很有前景的量化物种模式的捷径是将属和科用作物种的替代物。在大空间尺度上，物种丰富度、稀有度以及物种和高级分类单元组成模式之间的一致性通常很高。然而，只有少数研究人员在局部尺度上研究了这种关系，而局部尺度在土地利用冲突中往往是相关尺度。我们调查了高级分类单元方法在评估局部尺度上物种丰富度、稀有度和组成模式方面的可靠性。我们研究了三种常用替代分类单元的多样性模式：维管植物、地栖甲虫和蛾类。我们在以色列的耶路撒冷山脉和犹地亚山麓对这些分类单元进行了全年实地调查。所有分类单元的物种丰富度和组成与属的丰富度和组成高度相关。在科的层面上，与物种丰富度和组成的相关性要低得多。排除单型属和科并不影响这些关系。基于高级分类单元的稀有度表示因分类单元、稀有度尺度而异，并且与丰富度和组成表示相比要弱。物种和属的累积丰富度曲线显示出相似的模式，在同等采样努力下趋于平稳。属级评估是局部物种丰富度、稀有度和组成模式的可靠替代，但科级评估表现不佳。在局部多样性调查中使用粗略分类尺度的优势在于它可能会减少鉴定时间和对专家的需求，但不会减少采样工作量。
