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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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 |
_version_ |
1766382827079729152 |