The zooplankton of the north sea

Fransz, H.G.; Colebrook, J. M.; Gamble, J. C.; Krause, Michael

doi:10.1016/0077-7579(91)90003-j

Cited by 164 publications

(114 citation statements)

References 129 publications

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“…There were no obvious differences in grazing response between taxonomic classes, but there was a distinct difference between species within the classes. Copepods are regarded to be of special importance because of their high grazing activity and their abundance (Fransz et al, 1991). Among copepods the highest ingestion rates of Phaeocystis cells (measured under comparable conditionsl were found for Temora longicornis and Calanus helgolandicus (Fig.…”

Section: Resultsmentioning

confidence: 89%

Trophic interactions between zooplankton andPhaeocystis cf.globosa

Hansen

1995

Helgolander Meeresunters

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Mesozooplankton grazing on Phaeocystis cf. globosa was investigated by laboratory and field studies. Tests on 18 different species by means of laboratory incubation experiments, carried out at the Biologische Anstalt Helgotand, revealed that Phaeocystis was ingested by 5 meroplanktonic and 6 holoplanktonic species; filtering and ingestion rates of the latter were determined. Among copepods, the highest feeding rates were found for Calanus helgolandicus and Temora longicornis. ton grazing by the dominant copepod -femora longicorms to be negligible during the Phaeocysti, spring bloom. T longicornis gut fluorescence was inversely related to Phaeocystis dominance. Th~ hypothesis has been put forward that 7". 1ongicornis preferentially feeds on microzooplankton and b) this may enhance rather than depress Phaeocystis blooms. Results from laboratory incubatioc experiments, including three trophic levels -Phaeocystis cf globosa (algael. Strombidinopsis sp Iciliatel and Temora longicornis (copepod) -support this hypothesis.

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Section: Resultsmentioning

confidence: 89%

Trophic interactions between zooplankton andPhaeocystis cf.globosa

Hansen

1995

Helgolander Meeresunters

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“…C. helgolandicus is initialised using a function of abundance versus latitude based on 228 average January abundances from the CPR standard areas. The two Calanus species diapause 229 in the bottom layer of the Norwegian trench (Fransz et al, 1991). We therefore use data from 230 the Arendal Station in the Skagerrak to force the seasonal vertical migration of the two 231…”

Section: Introduction 27mentioning

confidence: 99%

“…C. helgolandicus ascend 233 as C4, C5 and adults in April (Figure 5c). C. finmarchicus has been reported to descend for 234 diapause at stages C5 to adults in late summer (Fransz et al, 1991). This was included in the 235 model as a downward migration of 3 m d -1 from day 215 for stages C4 to adults based on CPR 236…”

Section: Introduction 27mentioning

confidence: 99%

Sensitivity of Calanus spp. copepods to environmental changes in the North Sea using life-stage structured models

Maar

Møller

Gürkan

et al. 2013

Progress in Oceanography

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2The copepods Calanus finmarchicus and C. helgolandicus co-exist in the North Sea, 3 but their spatial distribution and phenology are very different. Long-term changes in their 4 distributions seem to occur due to climate change resulting in a northward extension of C. 5 helgolandicus and a decline of C. finmarchicus in this region. The aim of this study is to use life-6 stage structured models of the two Calanus species embedded in a 3D coupled hydrodynamic-7 biogeochemical model to investigate how the biogeography of C. finmarchicus and C. scenario suggest that in a warmer future, C. finmarchicus is likely to decline and C. 21 helgolandicus abundance will probably continue to increase in some areas. 22 23

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“…Nevertheless, the short summer of less than 2 months in the White Sea (Berger et al 2003) is suYcient for species success. In August, observed prosome length of C. hamatus females averages 1,135 § 167 m, a size that is located in the upper part of the wide range 750-1,570 m, reported for Atlantic population (Fransz et al 1991). Temora longicornis (alike C. hamatus) tends to populate warm coastal and shelf waters of North and Middle Atlantic, producing several generations and overwinters as resting eggs in northern areas (Gaard 1999;Dippner et al 0 day 2 day 3 day 4 day 6 day 8 day 10 day 0 day 2 day 3 day 4 day 6 day 8 day 10 day 0 day 2 day 3 day 4 day 6 day 8 day 10 day 0 day 2 day 3 day 4 day 6 day 8 day 10 day 2 day 3 day 4 day 6 day 8 day 10 day 0 day 2 day 3 day 4 day 6 day 8 day 10 day 0 day 2 day 3 day 4 day 6 day 8 day 10 day 0 day 2 day 3 day 4 day 6 day 8 day 10 day 2000; Licandro et al 2001;Engel and Hirche 2004;Alheit et al 2005;Aube et al 2005;Devreker et al 2005;Debes and Eliasen 2006;Durbin and Casas 2006;Kane and Prezioso 2008).…”

Section: Discussionmentioning

confidence: 99%

Adaptation strategies of copepods (superfamily Centropagoidea) in the White Sea (66°N)

2008

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Seasonal dynamics of major biochemical features were studied for three abundant egg-diapausing copepods Acartia biWlosa, Centropages hamatus and Temora longicornis, in the White Sea (66°N), between June 2002 and September 2002. Dry weight (DW) and prosome length varied from 0.54 g ind ¡1 and 0.163 § 0.012 mm (A. biWlosa, CI) to 9.58 § 0.72 g ind ¡1 and 1.135 § 0.167 mm (C. hamatus, females). C org and N org content reached up to 5.91 § 0.44 and 1.23 § 0.09 g ind ¡1 (C. hamatus, females). Protein and lipid content varied greatly from 31.8 to 67.3% DW and from 8.7 to 42.6% DW, respectively. These species show somewhat diVerent biology compared to species at lower latitudes. The copepods use lipid stores to survive during short-term food shortage (e.g. in autumn) and successfully complete their life cycle. In the isolated White Sea during last post-glacial period, species probably evolved some special biochemical features (especially wax esters presence). Food quality demands and long ice coverage are possible factors limiting early development of species in spring.

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The zooplankton of the north sea

Cited by 164 publications

References 129 publications

Trophic interactions between zooplankton andPhaeocystis cf.globosa

Trophic interactions between zooplankton andPhaeocystis cf.globosa

Sensitivity of Calanus spp. copepods to environmental changes in the North Sea using life-stage structured models

Adaptation strategies of copepods (superfamily Centropagoidea) in the White Sea (66°N)

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