Responses of Ammonia species to euxinic conditions in a seasonally stratified, marine Rogoznica Lake (Croatia) (CROSBI ID 677003)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Ćosović, Vlasta ; Ciglenečki Jušić, Irena ; Mikac, Nevenka ; Čančar, Marina ; Neral, Natali
engleski
Responses of Ammonia species to euxinic conditions in a seasonally stratified, marine Rogoznica Lake (Croatia)
Hydrology, chemistry, benthic metazoans and plankton communities in seasonally stratified, marine Rogoznica Lake (Eastern Adriatic coast, Croatia), have been studied extensively in the past two decades, but not the benthic protozoan community (mainly foraminifera) occurring on- or in- the sediment. Depending on the meteorological conditions, the lake fluctuates between meromictic and holomictic anoxic conditions. It provides site where the redoxcline is situated in the euxinic water column and in the sediment. The short cores collected from the depth of 9 m and 13 m in 2010, revealed well preserved assemblages of benthic foraminifera. Sediment cores were sliced for geochemical and biological studies with 2 cm resolution down to bottom of the core in order to follow the environmental changes in time. Foraminiferal tests occur in all studied samples and their number vary along the cores. The studied foraminiferal assemblages are composed of endopelic Ammonia species. Specimens of Ammonia parkinsoniana (d’Orbigny) and Ammonia tepida (Cushman) dominate. Tests are with lobate and smooth outlines and of the same size (6-7 chambers in the last whorl). The abundance of species shows positive correlation to the concentration of redox sensitive trace elements (vanadium and molybdenum in interval 16 to 20 cm and 18 to 22 cm, respectively) confirming that these species live and reproduce under euxinic conditions. In the same zone accumulation of TOC and total S content were found which all together indicate history of anoxic holomixis appearance in the water column of the lake.
Rogoznica Lake ; Anoxia ; Ammonia spp. ; Dominance
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Podaci o prilogu
38-38.
2019.
objavljeno
10.5281/zenodo.2614428
Podaci o matičnoj publikaciji
International Conference Adriatic Biodiversity Protection – AdriBioPro2019 7-10 April 2019, Kotor, Montenegro, Book of Abstracts
Kotor: Univerzitet Crne Gore, Institut za biologiju mora
978-9940-9613-2-9
Podaci o skupu
Adriatic Biodiversity Conservation (AdriBioPro2019)
ostalo
07.04.2019-10.04.2019
Kotor, Crna Gora