• Author: Diekmann, A. Berenike S.

    Institute of Hydrobiology and Fisheries Science, University of Hamburg

  • Author: Clemmesen, Catriona

    Leibniz Institut für Meereswissenschaften (IFM-GEOMAR)

  • Author: St. John, Michael A.

    Section for Population Ecology and Genetics, National Institute of Aquatic Resources, Technical University of Denmark, Charlottenlund Slot Jægersborg Allé 1, 2920, Charlottenlund, Denmark

  • Author: Paulsen, Matthias

    Leibniz Institut für Meereswissenschaften (IFM-GEOMAR)

  • Author: Peck, Myron A.

    Institute of Hydrobiology and Fisheries Science, University of Hamburg

  • Author: Sommer, Ulrich

  • Author: Adrian, Rita

  • Author: Bauer, Barbara

  • Author: Winder, Monika

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Information on physiological rates and tolerances helps one gain a cause-and-effect understanding of the role that some environmental (bottom–up) factors play in regulating the seasonality and productivity of key species. We combined the results of laboratory experiments on reproductive success and field time series data on adult abundance to explore factors controlling the seasonality of Acartia spp., Eurytemora affinis and Temora longicornis, key copepods of brackish, coastal and temperate environments. Patterns in laboratory and field data were discussed using a metabolic framework that included the effects of ‘controlling’, ‘masking’ and ‘directive’ environmental factors. Over a 5-year period, changes in adult abundance within two south-west Baltic field sites (Kiel Fjord Pier, 54°19′89N, 10°09′06E, 12–21 psu, and North/Baltic Sea Canal NOK, 54°20′45N, 9°57′02E, 4–10 psu) were evaluated with respect to changes in temperature, salinity, day length and chlorophyll a concentration. Acartia spp. dominated the copepod assemblage at both sites (up to 16,764 and 21,771 females m−3 at NOK and Pier) and was 4 to 10 times more abundant than E. affinis (to 2,939 m−3 at NOK) and T. longicornis (to 1,959 m−3 at Pier), respectively. Species-specific salinity tolerance explains differences in adult abundance between sampling sites whereas phenological differences among species are best explained by the influence of species-specific thermal windows and prey requirements supporting survival and egg production. Multiple intrinsic and extrinsic (environmental) factors influence the production of different egg types (normal and resting), regulate life-history strategies and influence match–mismatch dynamics.
Original languageEnglish
JournalMarine Biology
Publication date2012
Volume159
Journal number11
Pages2399-2414
ISSN0025-3162
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 2
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