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Invertebrate Animals (Metazoa
A total of 19 types, 39 classes, 123 orders, 477 families and 1590 species are known from the Bulgarian Black Sea. They include 1059 species (66.6%) marine and marine-brackish forms and 531 species (33.4%) freshwater-brackish, freshwater and terrestrial forms, connected with water. Five types (Nematoda, Rotifera, Annelida, Arthropoda and Mollusca) have a high species richness (over 100 species). The vertical distribution has been analyzed for 805 species (76.0%) - marine and marine-brackish forms. The marine and marine-brackish species are divided into 162 zoogeographical categories, combined into 4 main groups and 16 subgroups. The main portion of the Black Sea fauna has an Atlantic-Mediterranean origin and represents the impoverished Atlantic-Mediterranean fauna (740 species - 69.9%). Cosmopolitan, Atlantic-Indian, Atlantic-Pacific, endemic and Caspian relict forms are represented. The benthic (115 species - 97.5%) and marine (114 species - 96.6%) forms of the Black Sea endemics (118 species - 11.2%) predominate. The brackish endemics (11 species - 9.3%) most often are Caspian relicts.
$56.00
Invertebrate Animals (Metazoa—
$56.00
Invertebrate Animals (Metazoa
A total of 19 types, 39 classes, 123 orders, 477 families and 1590 species are known from the Bulgarian Black Sea. They include 1059 species (66.6%) marine and marine-brackish forms and 531 species (33.4%) freshwater-brackish, freshwater and terrestrial forms, connected with water. Five types (Nematoda, Rotifera, Annelida, Arthropoda and Mollusca) have a high species richness (over 100 species). The vertical distribution has been analyzed for 805 species (76.0%) - marine and marine-brackish forms. The marine and marine-brackish species are divided into 162 zoogeographical categories, combined into 4 main groups and 16 subgroups. The main portion of the Black Sea fauna has an Atlantic-Mediterranean origin and represents the impoverished Atlantic-Mediterranean fauna (740 species - 69.9%). Cosmopolitan, Atlantic-Indian, Atlantic-Pacific, endemic and Caspian relict forms are represented. The benthic (115 species - 97.5%) and marine (114 species - 96.6%) forms of the Black Sea endemics (118 species - 11.2%) predominate. The brackish endemics (11 species - 9.3%) most often are Caspian relicts.
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Description
A total of 19 types, 39 classes, 123 orders, 477 families and 1590 species are known from the Bulgarian Black Sea. They include 1059 species (66.6%) marine and marine-brackish forms and 531 species (33.4%) freshwater-brackish, freshwater and terrestrial forms, connected with water. Five types (Nematoda, Rotifera, Annelida, Arthropoda and Mollusca) have a high species richness (over 100 species). The vertical distribution has been analyzed for 805 species (76.0%) - marine and marine-brackish forms. The marine and marine-brackish species are divided into 162 zoogeographical categories, combined into 4 main groups and 16 subgroups. The main portion of the Black Sea fauna has an Atlantic-Mediterranean origin and represents the impoverished Atlantic-Mediterranean fauna (740 species - 69.9%). Cosmopolitan, Atlantic-Indian, Atlantic-Pacific, endemic and Caspian relict forms are represented. The benthic (115 species - 97.5%) and marine (114 species - 96.6%) forms of the Black Sea endemics (118 species - 11.2%) predominate. The brackish endemics (11 species - 9.3%) most often are Caspian relicts.
