Seasonal changes and population dynamics of the ctenophore Mnemiopsis leidyi after its first year of invasion in the Kiel Fjord, Western Baltic Sea.

Javidpour, Jamileh , Molinero, Juan Carlos, Peschutter, Jesco and Sommer, Ulrich (2009) Seasonal changes and population dynamics of the ctenophore Mnemiopsis leidyi after its first year of invasion in the Kiel Fjord, Western Baltic Sea. Open Access Biological Invasions, 11 . pp. 873-882. DOI 10.1007/s10530-008-9300-8.

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Abstract

We analyzed the seasonal variations of the ctenophore Mnemiopsis leidyi weekly collected since its first record in the western Baltic Sea in October 2006. The distribution pattern together with the seasonal dynamics and population outbreaks in late summer 2007 indicate recent successfully establishment of M. leidyi in this area. Seasonal changes showed two periods of high reproductive activity characterized by a population structure dominated by small size classes, followed by an increase of larger ones. These results further revealed that the bulk of the population remains in deep layers during the periods of low population density, whereas it appeared situated in upper layers during the proliferation of the species. We further emphasized the strength of the population outbreaks, which can reach abundances >10-fold higher in time periods shorter than a week. The predatory impact this species may have in pelagic ecosystems warns on the importance of its recent range of expansion.

Document Type: Article
Keywords: Biological invasions, Ctenophores, Mnemiopsis leidyi, population structure, Baltic Sea
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/s10530-008-9300-8
ISSN: 1573-1464
Projects: Future Ocean
Date Deposited: 12 Mar 2009 14:43
Last Modified: 21 Jan 2019 14:54
URI: http://oceanrep.geomar.de/id/eprint/7183

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