On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community

During the Fladen Ground Experiment (FLEX, March 26-June 6, 1976) quantitative investigations of herbivorous zooplankton were performed. For that purpose 1785 water samples (5 or 10 l) were taken with a rosette sampler at the central station (pos. 58° 55' N, 0° 32' E) from nine to ten stan...

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Main Authors: Krause, Michael, Radach, Günther
Format: Article in Journal/Newspaper
Language:English
Published: Bornträger 1980
Subjects:
Online Access:https://oceanrep.geomar.de/id/eprint/56417/
https://oceanrep.geomar.de/id/eprint/56417/1/Krause_M_1980_A.pdf
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spelling ftoceanrep:oai:oceanrep.geomar.de:56417 2023-05-15T15:47:52+02:00 On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community Krause, Michael Radach, Günther 1980 text https://oceanrep.geomar.de/id/eprint/56417/ https://oceanrep.geomar.de/id/eprint/56417/1/Krause_M_1980_A.pdf en eng Bornträger https://oceanrep.geomar.de/id/eprint/56417/1/Krause_M_1980_A.pdf Krause, M. and Radach, G. (1980) On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community. Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 22 . pp. 133-149. info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1980 ftoceanrep 2023-04-07T16:03:12Z During the Fladen Ground Experiment (FLEX, March 26-June 6, 1976) quantitative investigations of herbivorous zooplankton were performed. For that purpose 1785 water samples (5 or 10 l) were taken with a rosette sampler at the central station (pos. 58° 55' N, 0° 32' E) from nine to ten standard depths and filtered through 30 µm gauze filters. The development of the most important Zooplankton groups at the central Station is presented in depth-integrated time series (0-100 m) of individuals per m2. The number of individuals of Calanus finmarchicus was converted to biomass (dry weight). At the end of the sampling at the central station the standing stock of Calanus finmarchicus showed about 18 g dry weight per m2. Numerical values for the time lags between different plankton groups are calculated with the aid of the cross-correlation function. The time lag between the diatom ad copepod egg peaks is only up to 2.75 days; that between diatoms and the larvae of bottom invertegrates is 5 days. Between the copepod eggs and the maximum number of nauplii (N I-N VI) there is a time lag of 10.75 days. Another 10.25 days lie between the maximum numbers of nauplii and copepodites (C I-C VI). Considering the depth-integrated time series of the abundance of Calanus finmarchicus copepodites, a succession of the Stages seems to exist. Nevertheless, numerical values for the time lags between the different developmental stages cannot be calculated unambiguously by the cross-correlation technique. This is probably caused by extreme simultaneous fluctuations, especially of the numbers of all stages of Calanus finmarchicus in the last phase of the sampling at the central station. Article in Journal/Newspaper Calanus finmarchicus OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
institution Open Polar
collection OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
op_collection_id ftoceanrep
language English
description During the Fladen Ground Experiment (FLEX, March 26-June 6, 1976) quantitative investigations of herbivorous zooplankton were performed. For that purpose 1785 water samples (5 or 10 l) were taken with a rosette sampler at the central station (pos. 58° 55' N, 0° 32' E) from nine to ten standard depths and filtered through 30 µm gauze filters. The development of the most important Zooplankton groups at the central Station is presented in depth-integrated time series (0-100 m) of individuals per m2. The number of individuals of Calanus finmarchicus was converted to biomass (dry weight). At the end of the sampling at the central station the standing stock of Calanus finmarchicus showed about 18 g dry weight per m2. Numerical values for the time lags between different plankton groups are calculated with the aid of the cross-correlation function. The time lag between the diatom ad copepod egg peaks is only up to 2.75 days; that between diatoms and the larvae of bottom invertegrates is 5 days. Between the copepod eggs and the maximum number of nauplii (N I-N VI) there is a time lag of 10.75 days. Another 10.25 days lie between the maximum numbers of nauplii and copepodites (C I-C VI). Considering the depth-integrated time series of the abundance of Calanus finmarchicus copepodites, a succession of the Stages seems to exist. Nevertheless, numerical values for the time lags between the different developmental stages cannot be calculated unambiguously by the cross-correlation technique. This is probably caused by extreme simultaneous fluctuations, especially of the numbers of all stages of Calanus finmarchicus in the last phase of the sampling at the central station.
format Article in Journal/Newspaper
author Krause, Michael
Radach, Günther
spellingShingle Krause, Michael
Radach, Günther
On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community
author_facet Krause, Michael
Radach, Günther
author_sort Krause, Michael
title On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community
title_short On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community
title_full On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community
title_fullStr On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community
title_full_unstemmed On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community
title_sort on the succession of developmental stages of herbivorous zooplankton in the northern north sea during flex '76, 1 : first statements about the main groups of the zooplankton community
publisher Bornträger
publishDate 1980
url https://oceanrep.geomar.de/id/eprint/56417/
https://oceanrep.geomar.de/id/eprint/56417/1/Krause_M_1980_A.pdf
genre Calanus finmarchicus
genre_facet Calanus finmarchicus
op_relation https://oceanrep.geomar.de/id/eprint/56417/1/Krause_M_1980_A.pdf
Krause, M. and Radach, G. (1980) On the succession of developmental stages of herbivorous zooplankton in the northern North Sea during FLEX '76, 1 : first statements about the main groups of the zooplankton community. Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 22 . pp. 133-149.
op_rights info:eu-repo/semantics/restrictedAccess
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