Offshore expoitation of oil and other hydrocarbons requires the installation of platforms or similar structures fixed to the sea bottom. Generally, such structures remain in situ for long time after the end of drilling and pruduction activities. The macrozoobenthic communities of a sea area located in the Northern Adriatic Sea sorrounding one of these platforms were studied on two occasions: the first prior to the installation of the platform (1985), the second 8 years later (1993), after production and other activities had terminated. On both occasions, sampling were performed according to similar sampling grids extended about 3.5. km from the platform site. Comparing the community composition of the two periods, a remarkable decrease of surface deposit-feeders was observed in the second period. Ordering techniques, applied to the entire data set of communities samples of both periods, pointed out not only the expected separation of the sampling points of the two periods but also a different patter of dispersion.
Effect of submerged structures on the diversity of macrozoobenthos in the Northern Adriatic Sea / Crema, Roberto; Prevedelli, Daniela; A., Castelli. - STAMPA. - (2001), pp. 367-374. (Intervento presentato al convegno 1st National Congress of Marine Science tenutosi a ISL ISCHIA, ITALY nel NOV 11-14, 1998).
Effect of submerged structures on the diversity of macrozoobenthos in the Northern Adriatic Sea.
CREMA, Roberto;PREVEDELLI, Daniela;
2001
Abstract
Offshore expoitation of oil and other hydrocarbons requires the installation of platforms or similar structures fixed to the sea bottom. Generally, such structures remain in situ for long time after the end of drilling and pruduction activities. The macrozoobenthic communities of a sea area located in the Northern Adriatic Sea sorrounding one of these platforms were studied on two occasions: the first prior to the installation of the platform (1985), the second 8 years later (1993), after production and other activities had terminated. On both occasions, sampling were performed according to similar sampling grids extended about 3.5. km from the platform site. Comparing the community composition of the two periods, a remarkable decrease of surface deposit-feeders was observed in the second period. Ordering techniques, applied to the entire data set of communities samples of both periods, pointed out not only the expected separation of the sampling points of the two periods but also a different patter of dispersion.
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