Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions
One of the biggest challenges in more accurately forecasting the effects of climate change on future food web dynamics relates to how climate change affects multi-trophic species interactions, particularly when multiple interacting stressors are considered. Using a dynamic food web model, we investi...
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Online Access: | https://hdl.handle.net/2440/132951 https://doi.org/10.1016/j.scitotenv.2021.149624 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/132951 2023-12-17T10:47:52+01:00 Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions Climate change negates positive CO(2) effects on marine species biomass and productivity by altering the strength and direction of trophic interactions Ullah, M.H. Fordham, D.A. Nagelkerken, I. 2021 https://hdl.handle.net/2440/132951 https://doi.org/10.1016/j.scitotenv.2021.149624 en eng Elsevier http://purl.org/au-research/grants/arc/FT120100183 Science of the Total Environment, 2021; 801:1-8 0048-9697 1879-1026 https://hdl.handle.net/2440/132951 doi:10.1016/j.scitotenv.2021.149624 Ullah, M.H. [0000-0002-3034-8089] Fordham, D.A. [0000-0003-2137-5592] Nagelkerken, I. [0000-0003-4499-3940] © 2021 Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.scitotenv.2021.149624 Climate change Direct and indirect interactions Food webs Ocean acidification Species interactions Trophic interaction strengths Journal article 2021 ftunivadelaidedl https://doi.org/10.1016/j.scitotenv.2021.149624 2023-11-20T23:22:29Z One of the biggest challenges in more accurately forecasting the effects of climate change on future food web dynamics relates to how climate change affects multi-trophic species interactions, particularly when multiple interacting stressors are considered. Using a dynamic food web model, we investigate the individual and combined effect of ocean warming and acidification on changes in trophic interaction strengths (both direct and indirect) and the consequent effects on biomass structure of food web functional groups. To do this, we mimicked a species-rich multi-trophic-level temperate shallow-water rocky reef food web and integrated empirical data from mesocosm experiments on altered species interactions under warming and acidification, into food-web models. We show that a low number of strong temperature-driven changes in direct trophic interactions (feeding and competition) will largely determine the magnitude of biomass change (either increase or decrease) of high-order consumers, with increasing consumer biomass suppressing that of prey species. Ocean acidification, in contrast, alters a large number of weak indirect interactions (e.g. cascading effects of increased or decreased abundances of other groups), enabling a large increase in consumer and prey biomass. The positive effects of ocean acidification are driven by boosted primary productivity, with energy flowing up to higher trophic levels. We show that warming is a much stronger driver of positive as well as negative modifications of species biomass compared to ocean acidification. Warming affects a much smaller number of existing trophic interactions, though, with direct consumer-resource effects being more important than indirect effects. We conclude that the functional role of consumers in future food webs will be largely regulated by alterations in the strength of direct trophic interactions under ocean warming, with ensuing effects on the biomass structure of marine food webs. Hadayet Ullah, Damien A.Fordham, Ivan Nagelkerken Article in Journal/Newspaper Ocean acidification The University of Adelaide: Digital Library Science of The Total Environment 801 149624 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Climate change Direct and indirect interactions Food webs Ocean acidification Species interactions Trophic interaction strengths |
spellingShingle |
Climate change Direct and indirect interactions Food webs Ocean acidification Species interactions Trophic interaction strengths Ullah, M.H. Fordham, D.A. Nagelkerken, I. Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
topic_facet |
Climate change Direct and indirect interactions Food webs Ocean acidification Species interactions Trophic interaction strengths |
description |
One of the biggest challenges in more accurately forecasting the effects of climate change on future food web dynamics relates to how climate change affects multi-trophic species interactions, particularly when multiple interacting stressors are considered. Using a dynamic food web model, we investigate the individual and combined effect of ocean warming and acidification on changes in trophic interaction strengths (both direct and indirect) and the consequent effects on biomass structure of food web functional groups. To do this, we mimicked a species-rich multi-trophic-level temperate shallow-water rocky reef food web and integrated empirical data from mesocosm experiments on altered species interactions under warming and acidification, into food-web models. We show that a low number of strong temperature-driven changes in direct trophic interactions (feeding and competition) will largely determine the magnitude of biomass change (either increase or decrease) of high-order consumers, with increasing consumer biomass suppressing that of prey species. Ocean acidification, in contrast, alters a large number of weak indirect interactions (e.g. cascading effects of increased or decreased abundances of other groups), enabling a large increase in consumer and prey biomass. The positive effects of ocean acidification are driven by boosted primary productivity, with energy flowing up to higher trophic levels. We show that warming is a much stronger driver of positive as well as negative modifications of species biomass compared to ocean acidification. Warming affects a much smaller number of existing trophic interactions, though, with direct consumer-resource effects being more important than indirect effects. We conclude that the functional role of consumers in future food webs will be largely regulated by alterations in the strength of direct trophic interactions under ocean warming, with ensuing effects on the biomass structure of marine food webs. Hadayet Ullah, Damien A.Fordham, Ivan Nagelkerken |
format |
Article in Journal/Newspaper |
author |
Ullah, M.H. Fordham, D.A. Nagelkerken, I. |
author_facet |
Ullah, M.H. Fordham, D.A. Nagelkerken, I. |
author_sort |
Ullah, M.H. |
title |
Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
title_short |
Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
title_full |
Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
title_fullStr |
Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
title_full_unstemmed |
Climate change negates positive CO₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
title_sort |
climate change negates positive co₂ effects on marine species biomass and productivity by altering the strength and direction of trophic interactions |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/2440/132951 https://doi.org/10.1016/j.scitotenv.2021.149624 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
http://dx.doi.org/10.1016/j.scitotenv.2021.149624 |
op_relation |
http://purl.org/au-research/grants/arc/FT120100183 Science of the Total Environment, 2021; 801:1-8 0048-9697 1879-1026 https://hdl.handle.net/2440/132951 doi:10.1016/j.scitotenv.2021.149624 Ullah, M.H. [0000-0002-3034-8089] Fordham, D.A. [0000-0003-2137-5592] Nagelkerken, I. [0000-0003-4499-3940] |
op_rights |
© 2021 Elsevier B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.scitotenv.2021.149624 |
container_title |
Science of The Total Environment |
container_volume |
801 |
container_start_page |
149624 |
_version_ |
1785571852915048448 |