hrvatski

PALEOEKOLOŠKE KARAKTERISTIKE JEZGRE SEDIMENTA HOLOCENA BAJ7 IZ JEZERA CRNIŠEVO, BAĆINSKA JEZERA

Diatoms (Bacillariophyta) preserved in lake sediment provide accurate information of paleoenvironmental changes. Diatom communities reflect water quality, since their floristic composition and productivity are sensitive to variations in pH, alkalinity, nutrient status, temperature and salinity. Investigation was conducted in 850 cm long sediment core BAJ7 on Lake Crniševo (Baćina Lakes), that is a mesotrophic, polymictic freshwater to slightly brakish lake. 30 sediment samples were analyzed due to the diatom composition, N, C and P concentrations. It was found 158 diatom taxa, and within 51 detected genera Cymbella and Navicula were dominated. According to relative proportion of diatoms and analyzed parameters, 13 diatom zones have been defined. The biggest zone is the deepest one from 570 to 780 cm and the smallest zone was from the 245 to 257 cm. Due to Ecological Quality Ratio based on TIDHR (Trophic Diatim Indeks HR) one sample indicates high status while 13 samples indicate good and 16 samples moderate status. High status was obtained in surface sample.

paleoekologija, alge kremenjašice, jezero Crniševo

nije evidentirano

engleski

PALEOECOLOGICAL CHARACTERISTICS OF LAKE CRNIŠEVO HOLOCENE SEDIMENT CORE BAJ7, BAĆINA LAKES

Diatoms (Bacillariophyta) preserved in lake sediment provide accurate information of paleoenvironmental changes. Diatom communities reflect water quality, since their floristic composition and productivity are sensitive to variations in pH, alkalinity, nutrient status, temperature and salinity. Investigation was conducted in 850 cm long sediment core BAJ7 on Lake Crniševo (Baćina Lakes), that is a mesotrophic, polymictic freshwater to slightly brakish lake. 30 sediment samples were analyzed due to the diatom composition, N, C and P concentrations. It was found 158 diatom taxa, and within 51 detected genera Cymbella and Navicula were dominated. According to relative proportion of diatoms and analyzed parameters, 13 diatom zones have been defined. The biggest zone is the deepest one from 570 to 780 cm and the smallest zone was from the 245 to 257 cm. Due to Ecological Quality Ratio based on TIDHR (Trophic Diatim Indeks HR) one sample indicates high status while 13 samples indicate good and 16 samples moderate status. High status was obtained in surface sample.

paleoecology, diatoms, Lake Crniševo

nije evidentirano