engleski

Macrozoobenthos of Vrana Lake on the Island of Cres

Vrana Lake, on the island of Cres in the Adriatic Sea, represents a specific karstic phenomenon. Due to its isolation,oligotrophy and relative youth(only 10,000 years old), species richness and abundance are very low. Only seventeen groups of macroinvertebrates inhabit the lake bottom. In the littoral communities, chironomids are the most abundant species, but in sublitoral and profundal zones, the zoobenthos is dominated by oligochaeta. Individual abundance declined from ca. 2900 mz in the littoral and sublitoral zones to 1800 m2 in profundal zone. At the deepest part of the lake m depth), which occupies only a small portion of the lakes area, we found the lowest average abundance (900 m2). Lake Vrana is also inhabite Assellus aquaticus arthrobranchialis (mainly in littoral communities), which is specially interesting and shows connection between the faun Vrana Lake and the fauna of northern Italy. l;he littoral zone is also characterized by dense populations of decapod cancer crabs (Austropotamo pallipes italicus) and mollusks of the genera Anodomta and Unio.

nije evidentirano

nije evidentirano