GIS mapping benthic vegetation biotopes of the Dzhangul coast

Abstract

The article reflects research, where for the first time mapping of benthic vegetation biotopes of the protected area “Coastal aquatic complex near the Dzhangul landslide coast” is carried out using GIS-technologies. The research is carried out on the basis of the expedition materials analysis collected in the coastal zone in the summer period of 2013. As a result of the work a bathymetrical map, maps of bottom sediments and habitats of the key macrophytobenthos species (Ericaria crinita, Gongolaria barbata, Nereia filiformis, Phyllophora crispa) and biotopes are compiled. Benthic vegetation biotopes classification is based on cartographic materials. Five biotopes are identified, described and analysed for their spatial distribution in the natural protected area. It is shown that biotopes with “Сystoseira” and Рhyllophora phytocenoses occupy the largest area in the coastal zone. These biotopes have a high conservation status at the regional, federal and international levels. In the deep-water zone of the protected area the biotopes with Nereia filiformis and Phyllophora crispa (drifting form), unique and rare for the Crimean coastal area have been identified. This area is found to be a peculiar reserve of both attached and drifting forms of Phyllophora crispa for the western coastal area of Crimea. Biotope classification and its conservation status are given according to international legislative documents (EUNIS, Annex 1 code, European Red List of Habitat). The development of a classification, mapping and inventory of habitats, and the preparation of a biotopes list in need of conservation, are urgent scientific tasks. The results can be used for monitoring protected benthic vegetation habitats and controlling their condition.