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Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf

The abundance of the subarctic copepod, Calanus finmarchicus, and temperate, shelf copepod, Centropages typicus, was estimated from samples collected bi-monthly over the Northeast U.S. continental shelf (NEUS) from 1977–2010. Latitudinal variation in long term trends and seasonal patterns for the tw...

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Autores principales: Bi, Hongsheng, Ji, Rubao, Liu, Hui, Jo, Young-Heon, Hare, Jonathan A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3909209/
https://www.ncbi.nlm.nih.gov/pubmed/24498177
http://dx.doi.org/10.1371/journal.pone.0087720
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author Bi, Hongsheng
Ji, Rubao
Liu, Hui
Jo, Young-Heon
Hare, Jonathan A.
author_facet Bi, Hongsheng
Ji, Rubao
Liu, Hui
Jo, Young-Heon
Hare, Jonathan A.
author_sort Bi, Hongsheng
collection PubMed
description The abundance of the subarctic copepod, Calanus finmarchicus, and temperate, shelf copepod, Centropages typicus, was estimated from samples collected bi-monthly over the Northeast U.S. continental shelf (NEUS) from 1977–2010. Latitudinal variation in long term trends and seasonal patterns for the two copepod species were examined for four sub-regions: the Gulf of Maine (GOM), Georges Bank (GB), Southern New England (SNE), and Mid-Atlantic Bight (MAB). Results suggested that there was significant difference in long term variation between northern region (GOM and GB), and the MAB for both species. C. finmarchicus generally peaked in May – June throughout the entire study region and Cen. typicus had a more complex seasonal pattern. Time series analysis revealed that the peak time for Cen. typicus switched from November – December to January - March after 1985 in the MAB. The long term abundance of C. finmarchicus showed more fluctuation in the MAB than the GOM and GB, whereas the long term abundance of Cen. typicus was more variable in the GB than other sub-regions. Alongshore transport was significantly correlated with the abundance of C. finmarchicus, i.e., more water from north, higher abundance for C. finmarchicus. The abundance of Cen. typicus showed positive relationship with the Gulf Stream north wall index (GSNWI) in the GOM and GB, but the GSNWI only explained 12–15% of variation in Cen. typicus abundance. In general, the alongshore current was negatively correlated with the GSNWI, suggesting that Cen. typicus is more abundant when advection from the north is less. However, the relationship between Cen. typicus and alongshore transport was not significant. The present study highlights the importance of spatial scales in the study of marine populations: observed long term changes in the northern region were different from the south for both species.
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spelling pubmed-39092092014-02-04 Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf Bi, Hongsheng Ji, Rubao Liu, Hui Jo, Young-Heon Hare, Jonathan A. PLoS One Research Article The abundance of the subarctic copepod, Calanus finmarchicus, and temperate, shelf copepod, Centropages typicus, was estimated from samples collected bi-monthly over the Northeast U.S. continental shelf (NEUS) from 1977–2010. Latitudinal variation in long term trends and seasonal patterns for the two copepod species were examined for four sub-regions: the Gulf of Maine (GOM), Georges Bank (GB), Southern New England (SNE), and Mid-Atlantic Bight (MAB). Results suggested that there was significant difference in long term variation between northern region (GOM and GB), and the MAB for both species. C. finmarchicus generally peaked in May – June throughout the entire study region and Cen. typicus had a more complex seasonal pattern. Time series analysis revealed that the peak time for Cen. typicus switched from November – December to January - March after 1985 in the MAB. The long term abundance of C. finmarchicus showed more fluctuation in the MAB than the GOM and GB, whereas the long term abundance of Cen. typicus was more variable in the GB than other sub-regions. Alongshore transport was significantly correlated with the abundance of C. finmarchicus, i.e., more water from north, higher abundance for C. finmarchicus. The abundance of Cen. typicus showed positive relationship with the Gulf Stream north wall index (GSNWI) in the GOM and GB, but the GSNWI only explained 12–15% of variation in Cen. typicus abundance. In general, the alongshore current was negatively correlated with the GSNWI, suggesting that Cen. typicus is more abundant when advection from the north is less. However, the relationship between Cen. typicus and alongshore transport was not significant. The present study highlights the importance of spatial scales in the study of marine populations: observed long term changes in the northern region were different from the south for both species. Public Library of Science 2014-01-31 /pmc/articles/PMC3909209/ /pubmed/24498177 http://dx.doi.org/10.1371/journal.pone.0087720 Text en https://creativecommons.org/publicdomain/zero/1.0/ This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.
spellingShingle Research Article
Bi, Hongsheng
Ji, Rubao
Liu, Hui
Jo, Young-Heon
Hare, Jonathan A.
Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf
title Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf
title_full Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf
title_fullStr Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf
title_full_unstemmed Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf
title_short Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf
title_sort decadal changes in zooplankton of the northeast u.s. continental shelf
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3909209/
https://www.ncbi.nlm.nih.gov/pubmed/24498177
http://dx.doi.org/10.1371/journal.pone.0087720
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