Factors of variation in the number of adventive species in herbaceous communities of the Western Caucasus |
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Authors: | V V Akatov T V Akatova T G Eskina |
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Institution: | 1.Maikop State Technological University,Maikop,Russia;2.Caucasian State Biosphere Reserve,Maikop,Russia |
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Abstract: | The saturation of herbaceous communities with adventive species in the Northern Caucasus has been estimated using as an indicator
the number of such species in 0.5-m2 plots. Among factors accounting for variation in the test parameter, consideration has been given to the coverage of the
herbaceous layer, the species richness of communities (in 0.5-m2 plots), and the numbers of adventive and indigenous species (in 15-m2 plots). The field data have been processes by methods of ordinary and multivariate regression analysis. The results show
that variation in saturation with adventive species between small areas of herbaceous communities largely depends on the number
of such species in larger areas, their species-holding capacity, and the level of completeness of communities. |
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