Spatial-typological organization of animal assemblages (results and conclusions)

Ravkin, Yu. S.

doi:10.1134/s1995425512010018

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Th is technique allowed obtaining information on the abundance and distribution of birds rapidly, simultaneously covering diff erent habitats and landscapes as well as individual subregions. In open landscapes, the birds are better recorded on automobile routes (Cheltsov-Bebutov, 1959) with a broken trajectory, due to higher representativeness of transects and comparability of results than in the control sites, thus making them the closest to random sample distribution (Ravkin, Livanov, 2009). Th e routes were selected freely, not in homogenous habitats (like forest tracts), or areas adjacent to them (the shores of large water bodies), which made it possible to equally count birds from diff erent ecological groups.…”

Section: Methodsmentioning

confidence: 99%

Spatial Heterogeneity of Steppe Bird Community in the Azov-Black Sea Enclave of the European Dry-Steppe Zone (Southern Ukraine)

Andryushchenko¹

2022

zoodiversity

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Over the period 2007–2019, the author’s censuses of steppe birds in the Azov-Black Sea dry-steppe enclave determined five species as dominants and co-dominants by their abundance. Thus, Melanocorypha calandra dominates throughout the whole area, Emberiza calandra dominates in 4 subregions and co-dominates in 5 subregions, Motacilla feldegg, Emberiza hortulana, Anthus campestris, Alauda arvensis dominate in 1 subregion and do not dominate or co-dominate in 1–4 subregions. There is a general increasing trend in the total abundance of steppe birds and the number of their rare breeding species from north-west to south-east, whereas the number of their dominants and co-dominants grows in the opposite direction. According to the list, the correlation between the dominants/co-dominants and the number of rare breeding steppe species, it was revealed that the most valuable for the support of the steppe bird populations are subregions with the largest areas of virgin steppes (the Kerch Peninsula, Western and Central Crimea). The least important are the subregions with the highest degree of anthropogenic transformation (northern part of the Syvash region, western part of the Black Sea region) and the Lower Dnipro wetlands. Therefore, it is a high abundance of steppe birds and the maximum number of rare steppe species which should be a specific ornithological indicator of the status of zonal landscapes in the dry steppe zone (especially within protected natural areas of Ukraine) rather than general avian species diversity including introduced, invasive species, synanthropes, etc.

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Section: Methodsmentioning

confidence: 99%