Benthic pelagic coupling in a mesocosm experiment: Delayed sediment responses and regime shifts.

Autor: Dimitriou PD; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece. Electronic address: pdimitriou@uoc.gr., Papageorgiou N; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece; Hellenic Centre for Marine Research, Institute of Oceanography, 71003 Heraklion, Crete, Greece., Geropoulos A; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece., Kalogeropoulou V; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece., Moraitis M; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece., Santi I; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece; Hellenic Centre for Marine Research, Institute of Oceanography, 71003 Heraklion, Crete, Greece., Tsikopoulou I; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece., Pitta P; Hellenic Centre for Marine Research, Institute of Oceanography, 71003 Heraklion, Crete, Greece., Karakassis I; University of Crete, Biology Department, 70013 Heraklion, Crete, Greece.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2017 Dec 15; Vol. 605-606, pp. 637-645. Date of Electronic Publication: 2017 Jul 01.
DOI: 10.1016/j.scitotenv.2017.06.239
Abstrakt: A mesocosm experiment was performed to study benthic-pelagic coupling under a eutrophication gradient. Nine mesocosms were deployed in the facilities of the Hellenic Center for Marine Research in Crete, in the Eastern Mediterranean. The mesocosms were 4m deep, containing 1.5m 3 of coastal water and, at the bottom, they included 85l of undisturbed sediment, collected from a semi-impacted area in the port of Heraklion, Crete. A eutrophication gradient was created by adding nutrients in the water column (Low and High) and the experiment lasted 58days. Water column and sediment environmental variables were measured at regular intervals. The results indicate that sedimentation caused by eutrophication in the water column affected sediment geochemical variables but in most cases a time lag was observed between the trophic status of the water column and the response of the sediment. Additionally, in the High eutrophication treatment, several fluctuations were observed and the system did not recover within the experimental duration, as opposed to the Low treatment which showed fewer fluctuations and signs of recovery.
(Copyright © 2017 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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