Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/118457
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Type: Journal article
Title: A triple trophic boost: How carbon emissions indirectly change a marine food chain
Author: Doubleday, Z.
Nagelkerken, I.
Coutts, M.
Goldenberg, S.
Connell, S.
Citation: Global Change Biology, 2019; 25(3):978-984
Publisher: Wiley Online Library
Issue Date: 2019
ISSN: 1354-1013
1365-2486
Statement of
Responsibility: 
Zoë A. Doubleday, Ivan Nagelkerken, Madeleine D. Coutts, Silvan U. Goldenberg, Sean D. Connell
Abstract: The pervasive enrichment of CO2 in our oceans is a well-documented stressor to marine life. Yet, there is little understanding about how CO2 affects species indirectly in naturally complex communities. Using natural CO2 vents, we investigated the indirect effects of CO2 enrichment through a marine food chain. We show how CO2 boosted the biomass of three trophic levels: from the primary producers (algae), through to their grazers (gastropods), and finally through to their predators (fish). We also found that consumption by both grazers and predators intensified under CO2 enrichment, but, ultimately, this top-down control failed to compensate for the boosted biomass of both primary producers and herbivores (bottom-up control). Our study suggests that indirect effects can buffer the ubiquitous and direct, negative effects of CO2 enrichment by allowing the upward propagation of resources through the food chain. Maintaining the natural complexity of food webs in our ocean communities could, therefore, help minimize the future impacts of CO2 enrichment.
Keywords: carbon dioxide; climate change; indirect effects; marine communities; ocean acidification; resource enrichment
Rights: © 2018 John Wiley & Sons Ltd.
RMID: 0030105152
DOI: 10.1111/gcb.14536
Grant ID: http://purl.org/au-research/grants/arc/DP150104263
http://purl.org/au-research/grants/arc/FT120100183
http://purl.org/au-research/grants/arc/FT0991953
Appears in Collections:Environment Institute publications

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