Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system
The strength of species interactions may have profound effects on population dynamics. Empirical estimates of interaction strength are often based on the assumption that the interaction strengths are constant. Barents Sea (BS) cod and capelin are two fish populations for which such an interaction ha...
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ftpubmed:oai:pubmedcentral.nih.gov:9627449 2023-05-15T15:38:54+02:00 Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system Durant, Joël M. Ono, Kotaro Langangen, Øystein 2022-11-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9627449/ http://www.ncbi.nlm.nih.gov/pubmed/36321432 https://doi.org/10.1098/rsbl.2022.0309 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9627449/ http://www.ncbi.nlm.nih.gov/pubmed/36321432 http://dx.doi.org/10.1098/rsbl.2022.0309 © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. CC-BY Biol Lett Population Ecology Text 2022 ftpubmed https://doi.org/10.1098/rsbl.2022.0309 2022-11-27T01:32:22Z The strength of species interactions may have profound effects on population dynamics. Empirical estimates of interaction strength are often based on the assumption that the interaction strengths are constant. Barents Sea (BS) cod and capelin are two fish populations for which such an interaction has been acknowledged and used, under the assumption of constant interaction strength, when studying their population dynamics. However, species interactions can often be nonlinear in marine ecosystems and might profoundly change our understanding of food chains. Analysing long-term time series data comprising a survey over 37 years in the Arcto-boreal BS, using a state-space modelling framework, we demonstrate that the effect of capelin on cod is not linear but shifts depending on capelin abundance: while capelin is beneficial for cod populations at high abundance; below the threshold, it becomes less important for cod. Our analysis therefore shows the importance of investigating nonlinearity in species interactions and may contribute to an improved understanding on species assemblages. Text Barents Sea PubMed Central (PMC) Barents Sea Biology Letters 18 11 |
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PubMed Central (PMC) |
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English |
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Population Ecology |
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Population Ecology Durant, Joël M. Ono, Kotaro Langangen, Øystein Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
topic_facet |
Population Ecology |
description |
The strength of species interactions may have profound effects on population dynamics. Empirical estimates of interaction strength are often based on the assumption that the interaction strengths are constant. Barents Sea (BS) cod and capelin are two fish populations for which such an interaction has been acknowledged and used, under the assumption of constant interaction strength, when studying their population dynamics. However, species interactions can often be nonlinear in marine ecosystems and might profoundly change our understanding of food chains. Analysing long-term time series data comprising a survey over 37 years in the Arcto-boreal BS, using a state-space modelling framework, we demonstrate that the effect of capelin on cod is not linear but shifts depending on capelin abundance: while capelin is beneficial for cod populations at high abundance; below the threshold, it becomes less important for cod. Our analysis therefore shows the importance of investigating nonlinearity in species interactions and may contribute to an improved understanding on species assemblages. |
format |
Text |
author |
Durant, Joël M. Ono, Kotaro Langangen, Øystein |
author_facet |
Durant, Joël M. Ono, Kotaro Langangen, Øystein |
author_sort |
Durant, Joël M. |
title |
Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
title_short |
Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
title_full |
Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
title_fullStr |
Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
title_full_unstemmed |
Empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
title_sort |
empirical evidence of nonlinearity in bottom up effect in a marine predator–prey system |
publisher |
The Royal Society |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9627449/ http://www.ncbi.nlm.nih.gov/pubmed/36321432 https://doi.org/10.1098/rsbl.2022.0309 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
Biol Lett |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9627449/ http://www.ncbi.nlm.nih.gov/pubmed/36321432 http://dx.doi.org/10.1098/rsbl.2022.0309 |
op_rights |
© 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsbl.2022.0309 |
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Biology Letters |
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18 |
container_issue |
11 |
_version_ |
1766370306683830272 |