Zoogeography of the free-living metazoan invertebrate animals (Metazoa: Invertebrata) from the Bulgarian sector of the Black Sea and the coastal brackish basins
Hubenov, Z. (2014). Zoogeography of the free-living metazoan invertebrate animals (Metazoa: Invertebrata) from the Bulgarian sector of the Black Sea and the coastal brackish basins. Acta Zool. Bulg. 66(3): 329-346
In: Acta Zoologica Bulgarica. Institute of Biodiversity and Ecosystem Research. Bulgarian Academy of Sciences: Sofia. ISSN 0324-0770, more
|   |
| Keyword |
|
| Author keywords |
Bulgarian Black Sea coast, invertebrate, zoogeography, invasive alien species, conservation |
| Abstract |
A total of 19 phyla, 39 classes, 123 orders, 470 families and 1537 species are known off the Bulgarian Black Sea coast. They include 1054 (68.6%) marine and marine-brackish species, and 508 (33.0%) freshwater-brackish, freshwater and terrestrial species connected with water. The most species-rich taxa are the Arthropoda (802 species, 52.2%), Annelida (173 species, 11.2%) and Mollusca (152 species, 9.9%). The depth distribution of 800 (75.9%) marine and marine-brackish species is analysed. The groups of stenohypo- (52 species, 6.5%), stenoepi- (465 species, 58.1%), meso- (115 species, 14.4%) and eurybathic species (168, 21.0%) are represented. The marine and marine-brackish species are classified into 162 zoogeographical categories, combined into 4 main groups and 16 subgroups. The main portion of the Black Sea fauna has Atlantic-Mediterranean origin and represents the impoverished Atlantic-Mediterranean fauna (740 species, 70.2%). It includes cosmopolitan, Atlantic-Indian, Atlantic-Pacific, endemic and Caspian relict species. The benthic (115, 97.5%) and marine (114, 96.6%) species of the Black Sea endemics (118 species, 11.2%) predominate. The brackish endemics (11 species, 9.3%) are mostly represented by Caspian relicts. Most of the Caspian relicts (41 species, 3.9%) are benthic brackish species (38, 92.7%). The freshwater-brackish, freshwater and terrestrial species connected with water, are classified into 80 zoogeographical categories, combined into 3 groups and 5 subgroups. Typical of the coast is the prevalence of the species found in the Palaearctic and beyond it (296 species, 58.3%). Species found only in the Palaearctic but in more than one subregion (79 species, 15.5%), and species found within one Palaearctic subregion (126 species, 24.8%): the Euro-Siberian (55 species, 10.8%) and the Mediterranean (71 species, 13.9%) are reported. Attention is paid to the invasive alien species and the conservation of the fauna. |
|
