Seasonal population dynamics of the invasive polychaete genus Marenzelleria spp. in contrasting soft-sediment habitats

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http://hdl.handle.net/10138/308896

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Kauppi , L , Norkko , A & Norkko , J 2018 , ' Seasonal population dynamics of the invasive polychaete genus Marenzelleria spp. in contrasting soft-sediment habitats ' , Journal of Sea Research , vol. 131 , pp. 46-60 . https://doi.org/10.1016/j.seares.2017.10.005

Title: Seasonal population dynamics of the invasive polychaete genus Marenzelleria spp. in contrasting soft-sediment habitats
Author: Kauppi, L.; Norkko, A.; Norkko, J.
Contributor organization: Tvärminne Zoological Station
Environmental Sciences
Marine Ecosystems Research Group
Tvärminne Benthic Ecology Team
Date: 2018-01
Language: eng
Number of pages: 15
Belongs to series: Journal of Sea Research
ISSN: 1385-1101
DOI: https://doi.org/10.1016/j.seares.2017.10.005
URI: http://hdl.handle.net/10138/308896
Abstract: Three species of the invasive polychaete genus Marenzelleria are among the dominant benthic taxa in many, especially deeper, areas in the Baltic Sea. The population dynamics of the polychaetes in the Baltic are, however, still largely unknown. We conducted monthly samplings of the benthic communities and environmental parameters at five sites with differing depths and sediment characteristics in the northern Baltic Sea (59 degrees 50.896', 23 degrees 15.092') to study the population dynamics, productivity and growth of Marenzelleria spp. from April 2013 to June 2014. The species of Marenzelleria occurring at the study sites were identified by genetic analyses. At the deepest site (33 m) only M. arctia was present, while all three species were found at the shallower, muddy sites (up to 20 m depth). At the shallow (6 m) sandy site only M. viridis and M. neglecta occurred. The sites differed in the seasonal dynamics of the Marenzelleria spp. population, reflecting the different species identities. The muddy sites up to 20 m depth showed clear seasonal dynamics, with the population practically disappearing by winter, whereas more stable populations occurred at the deepest site and at the sandy site. The highest density, biomass and production were observed at the 20 m deep, organic-rich muddy site where all three species recruited. The seasonally very high densities are likely to have important consequences for organic matter processing, and species interactions at these sites. The observed high productivity of the populations has possibly facilitated their establishment, and considerably increased secondary production in especially the deeper areas.
Subject: Invasion
Spionid polychaete
Productivity
Marenzelleria viridis
Marenzelleria neglecta
Marenzelleria arctia
BENTHIC MACROFAUNAL ASSEMBLAGES
SAN-FRANCISCO ESTUARY
NORTHERN BALTIC SEA
SECONDARY PRODUCTION
VIRIDIS POLYCHAETA
ECOSYSTEM CONSEQUENCES
NUTRIENT DYNAMICS
UNITED-STATES
LIFE-CYCLE
SPIONIDAE
1181 Ecology, evolutionary biology
1172 Environmental sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: acceptedVersion


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