Bivalve trophic ecology in the Mediterranean: Spatio-temporal variations and feeding behavior (CROSBI ID 255763)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Purroy, Ariadna ; Najdek, Mirjana ; Isla, Enrique ; Župan, Ivan ; Thebault, Julien ; Peharda, Melita
engleski
Bivalve trophic ecology in the Mediterranean: Spatio-temporal variations and feeding behavior
The trophic ecology of two bivalves, the clam Callista chione and the cockle Glycymeris bimaculata was studied using environmental and biochemical variables of the suspended particulate matter and the sediment. Samples were collected from two shallow sites, Pag and Cetina, in the coastal oligotrophic Mediterranean Sea, during a 17 month period. The temporal variation of the particulate matter reflected a mixture between marine and terrestrial sources throughout the year, with a clear marine influence during summer and fall, and predominance of terrestrial inputs during spring and winter. The digestive gland was a useful rapid turnover tissue, where the carbon isotope signal was species-specific and the nitrogen isotope one was site-specific. FA markers in the digestive gland revealed a mixed diet where Callista chione fed more upon fresh material than G. bimaculata which relied largely on bacteria-derived detritus. Overall, little feeding niche overlap was observed between the two species during the year, indicating resource partitioning, expected for a food-limited system. The present trophic ecology study in co-occurring species allowed identifying species-specific feeding adaptations to environmental variability.
Feeding ecology ; Bivalves ; Suspension feeder ; Biochemical variables ; Stable isotopes ; Fatty acids ; Adriatic sea ; Niche partitioning ; Coastal ecosystems
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Podaci o izdanju
142
2018.
234-249
objavljeno
0141-1136
1879-0291
10.1016/j.marenvres.2018.10.011