Interannual variations in Adriatic Sea zooplankton mirror shifts in circulation regimes in the Ionian Sea

Batistić, M., Garić, R. and Molinero, Juan Carlos (2014) Interannual variations in Adriatic Sea zooplankton mirror shifts in circulation regimes in the Ionian Sea Climate Research, 61 (3). pp. 231-240. DOI 10.3354/cr01248.

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We investigated potential connections over the past 2 decades between mesoscale circulation regimes in the Ionian Sea and newly-observed species and the concurrent rise in sea temperature in the Adriatic Sea. Analyses of plankton samples from 1993 to 2011 in the southern Adriatic revealed marked changes in the non-crustacean zooplankton community. Eleven species were recorded for the first time in the Adriatic, while 3 species reappeared after years of absence. We found that pluriannual changes in the zooplankton community tracked the continuum of circulation regimes in the Northern Ionian Gyre (NIG). The occurrence of Atlantic/Western Mediterranean species coincided with anti-cyclonic circulation in the NIG, probably due to the advection of Modified Atlantic Water into the Adriatic, while the presence of Lessepsian species coincided with the cyclonic pattern, which governs the entry of Eastern Mediterranean waters. The impact has been that newcomers now make a significant contribution to the zooplankton community in the southern Adriatic and, in certain cases, have replaced native species. Our results provide new evidence of the influence of teleconnection processes between the North Atlantic and Eastern Mediterranean on the dynamics of water masses in the southern Adriatic. The synergistic effects of these processes, together with warmer Mediterranean waters, raise concerns over dramatic changes in the marine biodiversity of the Adriatic.

Document Type: Article
Additional Information: WOS:000344343600004
Keywords: North Atlantic climate ; Hydroclimatic changes ; BiOS ; Thermohaline circulation ; Zooplankton ; Indicator species ; Mediterranean ; Adriatic
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.3354/cr01248
ISSN: 0936-577X
Projects: Future Ocean
Date Deposited: 04 Dec 2014 14:05
Last Modified: 14 Sep 2016 09:10

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