Predatory mite species in strata of soil and vegetation and their suitability as indicators for agro-chemicals
1993
Karg, W. (Biologische Bundesanstalt fuer Land- und Forstwirtschaft, Kleinmachnow (Germany). Inst. fuer Integrierten Pflanzenschutz)
Predatory mite species of the cohors Gamasina prove to be sensitive indicators of biocides in terrestrial ecosystems. They colonize with high diversity of species the different strata, the upper strata of soil, the strata of herbage, shrubbery and the region of tops. Out of each stratum widely distributed and represented species are chosen. According to the results of investigations by different authors some species react especially sensitive to agro-chemicals. There are existing relations of a vicariancy between strong sensitive species and less sensitive species. The present analysis points out at least one sensitive species from each stratum of terrestrial ecosystems suitable as sensitive bioindicator. In the field an ecosystem registers past contaminations like a "memory". Because there are manifesting changed relations of dominance of sensitive and less sensitive species
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