How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web
Abstract In linear food chains, resource and predator control produce positive and negative correlations, respectively, between biomass at adjacent trophic levels. These simple relationships become more complex in food webs that contain alternative food chains of unequal lengths. We have used a “min...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsaa028 http://academic.oup.com/icesjms/article-pdf/77/5/1639/33703694/fsaa028.pdf |
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croxfordunivpr:10.1093/icesjms/fsaa028 2024-02-11T10:00:41+01:00 How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web Thingstad, T Frede Browman, Howard Research Council of Norway The Nansen Legacy Trond Mohn Foundation 2020 http://dx.doi.org/10.1093/icesjms/fsaa028 http://academic.oup.com/icesjms/article-pdf/77/5/1639/33703694/fsaa028.pdf en eng Oxford University Press (OUP) http://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 77, issue 5, page 1639-1647 ISSN 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2020 croxfordunivpr https://doi.org/10.1093/icesjms/fsaa028 2024-01-12T09:47:58Z Abstract In linear food chains, resource and predator control produce positive and negative correlations, respectively, between biomass at adjacent trophic levels. These simple relationships become more complex in food webs that contain alternative food chains of unequal lengths. We have used a “minimum” model for the microbial part of the pelagic food web that has three such food chains connecting free mineral nutrients to copepods: via diatoms, autotrophic flagellates, and heterotrophic bacteria. Trophic cascades from copepods strongly modulates the balance between the three pathways and, therefore, the functionality of the microbial food web in services such as food production for higher trophic levels, DOM degradation, and ocean carbon sequestration. The result is a theoretical framework able to explain, not only apparent conflicts in Arctic mesocosm experiments, but also biogeochemical features of the Mediterranean. Here, the fundamental difference between Arctic and Mediterranean microbial food webs is the way they are predator driven by seasonal migration of large copepods in the Arctic, but resource driven due to the anti-estuarine circulation in the Mediterranean. In this framework, global change effects on microbial ecosystem functions are more like to come indirectly through changes in these drivers than through direct temperature effects on the microbes. Article in Journal/Newspaper Arctic Copepods Oxford University Press Arctic ICES Journal of Marine Science 77 5 1639 1647 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Thingstad, T Frede How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract In linear food chains, resource and predator control produce positive and negative correlations, respectively, between biomass at adjacent trophic levels. These simple relationships become more complex in food webs that contain alternative food chains of unequal lengths. We have used a “minimum” model for the microbial part of the pelagic food web that has three such food chains connecting free mineral nutrients to copepods: via diatoms, autotrophic flagellates, and heterotrophic bacteria. Trophic cascades from copepods strongly modulates the balance between the three pathways and, therefore, the functionality of the microbial food web in services such as food production for higher trophic levels, DOM degradation, and ocean carbon sequestration. The result is a theoretical framework able to explain, not only apparent conflicts in Arctic mesocosm experiments, but also biogeochemical features of the Mediterranean. Here, the fundamental difference between Arctic and Mediterranean microbial food webs is the way they are predator driven by seasonal migration of large copepods in the Arctic, but resource driven due to the anti-estuarine circulation in the Mediterranean. In this framework, global change effects on microbial ecosystem functions are more like to come indirectly through changes in these drivers than through direct temperature effects on the microbes. |
author2 |
Browman, Howard Research Council of Norway The Nansen Legacy Trond Mohn Foundation |
format |
Article in Journal/Newspaper |
author |
Thingstad, T Frede |
author_facet |
Thingstad, T Frede |
author_sort |
Thingstad, T Frede |
title |
How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
title_short |
How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
title_full |
How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
title_fullStr |
How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
title_full_unstemmed |
How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
title_sort |
how trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web |
publisher |
Oxford University Press (OUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1093/icesjms/fsaa028 http://academic.oup.com/icesjms/article-pdf/77/5/1639/33703694/fsaa028.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Copepods |
genre_facet |
Arctic Copepods |
op_source |
ICES Journal of Marine Science volume 77, issue 5, page 1639-1647 ISSN 1095-9289 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsaa028 |
container_title |
ICES Journal of Marine Science |
container_volume |
77 |
container_issue |
5 |
container_start_page |
1639 |
op_container_end_page |
1647 |
_version_ |
1790596392115240960 |