Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean
A long‐standing hypothesis states that low year‐round phytoplankton biomass in the open subarctic Pacific Ocean is maintained by herbivorous grazing. To evaluate the balance between phytoplankton growth and microzooplankton grazing, we carried out seawater dilution experiments at two subarctic Pacif...
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Language: | English |
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crwiley:10.4319/lo.1991.36.1.0050 2024-04-28T08:39:55+00:00 Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean Strom, Suzanne L. Welschmeyer, Nicholas A. 1991 http://dx.doi.org/10.4319/lo.1991.36.1.0050 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1991.36.1.0050 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1991.36.1.0050 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 36, issue 1, page 50-63 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1991 crwiley https://doi.org/10.4319/lo.1991.36.1.0050 2024-04-08T06:55:09Z A long‐standing hypothesis states that low year‐round phytoplankton biomass in the open subarctic Pacific Ocean is maintained by herbivorous grazing. To evaluate the balance between phytoplankton growth and microzooplankton grazing, we carried out seawater dilution experiments at two subarctic Pacific locations in June and September 1987. Pigment‐specific phytoplankton growth and grazing rates were obtained from dilution experiments by HPLC separation of phytoplankton pigments. This approach allowed us to look at the relationship between growth and grazing rates for different phytoplankton taxa. A wide range of rates was observed during any given experiment. Pigment‐specific growth rates ranged from 0.0 to 0.8 d −1 pigment‐specific microzooplankton grazing rates ranged from 0.0 to 0.6 d −1 . The highest growth rates appeared attributable to large diatoms, as indicated by both pigment and cell‐count data. Grazing rates were most closely matched with growth rates for small (<10 µ m) phytoplankton species; large diatom species seemed to be unaffected by microzooplankton grazing. Higher grazing rates were measured on pigments with the lowest standing stocks. Article in Journal/Newspaper Subarctic Wiley Online Library Limnology and Oceanography 36 1 50 63 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Strom, Suzanne L. Welschmeyer, Nicholas A. Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean |
topic_facet |
Aquatic Science Oceanography |
description |
A long‐standing hypothesis states that low year‐round phytoplankton biomass in the open subarctic Pacific Ocean is maintained by herbivorous grazing. To evaluate the balance between phytoplankton growth and microzooplankton grazing, we carried out seawater dilution experiments at two subarctic Pacific locations in June and September 1987. Pigment‐specific phytoplankton growth and grazing rates were obtained from dilution experiments by HPLC separation of phytoplankton pigments. This approach allowed us to look at the relationship between growth and grazing rates for different phytoplankton taxa. A wide range of rates was observed during any given experiment. Pigment‐specific growth rates ranged from 0.0 to 0.8 d −1 pigment‐specific microzooplankton grazing rates ranged from 0.0 to 0.6 d −1 . The highest growth rates appeared attributable to large diatoms, as indicated by both pigment and cell‐count data. Grazing rates were most closely matched with growth rates for small (<10 µ m) phytoplankton species; large diatom species seemed to be unaffected by microzooplankton grazing. Higher grazing rates were measured on pigments with the lowest standing stocks. |
format |
Article in Journal/Newspaper |
author |
Strom, Suzanne L. Welschmeyer, Nicholas A. |
author_facet |
Strom, Suzanne L. Welschmeyer, Nicholas A. |
author_sort |
Strom, Suzanne L. |
title |
Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean |
title_short |
Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean |
title_full |
Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean |
title_fullStr |
Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean |
title_full_unstemmed |
Pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean |
title_sort |
pigment‐specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic pacific ocean |
publisher |
Wiley |
publishDate |
1991 |
url |
http://dx.doi.org/10.4319/lo.1991.36.1.0050 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1991.36.1.0050 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1991.36.1.0050 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Limnology and Oceanography volume 36, issue 1, page 50-63 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1991.36.1.0050 |
container_title |
Limnology and Oceanography |
container_volume |
36 |
container_issue |
1 |
container_start_page |
50 |
op_container_end_page |
63 |
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1797570755335028736 |