Patterns of zonal changes in the spatial structure of Orthopteran communities in the European steppe |
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Authors: | N V Zinenko B R Striganova |
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Institution: | (1) The Research Center for East-West Cooperation in China, The Key Lab of GIScience of the Education Ministry PRC, East China Normal University, Shanghai, 200062, China;(2) The Key Lab of Oasis Ecology of the Education Ministry PRC, Xinjiang University, Urumqi, 830046, Xinjiang, China; |
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Abstract: | Patterns of zonal changes in the species composition, diversity, and community structure of Orthoptera were studied along
the latitudinal series of steppe types from meadow to desert steppe in European Russia. The maximum abundance of Orthoptera
was recorded in the typical steppe, while the maximum species richness shifted to the southern dry steppe. Changes in the
ecological preferences of orthopterans due to aridization are shown by the example of zonal communities. A gradual decline
of the forest-steppe orthopteran complex and an increase in the number of semidesert and desert species are demonstrated.
The changes in the species composition are accompanied by the intra-landscape shifts of areas with high species diversity.
Most species in the meadow steppe occupy mesophytic habitats in depressions. In the typical and dry steppe, the species richness
and abundance are restricted to habitats with zonal and xerophytic vegetation. In the desert steppe, the species diversity
is the highest in dry habitats, including halophytic ones, where xerophilic and desert species predominate. The diversity
and evenness indices increase in the northern and southern ecotones of the steppe zone. |
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