Mesozooplankton dynamics in a stratified semi-enclosed marine environment (Veliko jezero, South Adriatic Sea)

Autor: Miloslavić, Marijana, Lučić, Davor, Onofri Ivona, Gangai Barbara, Pestorić Branka
Přispěvatelé: Pešić, Vladimir
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Popis: A yearlong study of the mesozooplankton species composition, abundance and biomass distribution was conducted from February 2008 to February 2009 in the semi-enclosed marine lake Veliko Jezero. The degree of isolation strongly influences the composition of the community. Therefore, zooplankton populations in the lake were characterized by high abundance and a low number of species compared to the neighbouring open Adriatic. A total of 58 mesozooplankton taxa were identified. Copepods were found to be the dominant group over the entire sampling period and accounted for between 19% and 62% of total mesozooplankton density. The most abundant were cyclopoida-oithonids (Oithona similis and O. nana), and small calanoids Paracalanus parvus and Acartia clausi. The highest abundance and biomass were recorded during the summer, while the lowest values were related to the bottom hypoxia during autumn. Increased salinity in the surface during autumn suggests a stronger inflow of open Adriatic waters and coincides with increased biodiversity. Our analyses were based on the data available, indicating strong physical forcing as the primary influence on variation in zooplankton dynamics of the investigated area.
Databáze: OpenAIRE