نتایج جستجو برای: taxa
تعداد نتایج: 30725 فیلتر نتایج به سال:
The index of biotic integrity (IBI) is a commonly used bioassessment tool that integrates abundance and richness measures to assess water quality. In developing IBIs that are both responsive to human disturbance and resistant to natural variability and sampling error, water managers must decide how to weigh information about rare and abundant taxa, which in turn requires an understanding of the...
The factors determining gradients of biodiversity are a fundamental yet unresolved topic in ecology. While diversity gradients have been analysed for numerous single taxa, progress towards general explanatory models has been hampered by limitations in the phylogenetic coverage of past studies. By parallel sampling of 25 major plant and animal taxa along a 3.7 km elevational gradient on Mt. Kili...
Seven new species of Abbottella and related taxa are described from Hispaniola: Abbottella calliotropis n. sp., Abbottella diadema n. sp., Abbottella dichroa n. sp., Abbottella nitens n. sp., Abbottella paradoxa n. sp., Abbottella tenebrosa n. sp., and Leiabbottella thompsoni n. sp. Distributional and habitat notes are given for additional taxa.
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