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https://hdl.handle.net/2440/131817
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Type: | Journal article |
Title: | Positive species interactions strengthen in a high-CO₂ ocean |
Other Titles: | Positive species interactions strengthen in a high-CO(2) ocean |
Author: | Ferreira, C.M. Connell, S.D. Goldenberg, S.U. Nagelkerken, I. |
Citation: | Proceedings of the Royal Society B: Biological Sciences, 2021; 288(1954):1-6 |
Publisher: | Royal Society |
Issue Date: | 2021 |
ISSN: | 0962-8452 1471-2954 |
Statement of Responsibility: | Camilo M. Ferreira, Sean D. Connell, Silvan U. Goldenberg and Ivan Nagelkerken |
Abstract: | Negative interactions among species are a major force shaping natural communities and are predicted to strengthen as climate change intensifies. Similarly, positive interactions are anticipated to intensify and could buffer the consequences of climate-driven disturbances. We used in situ experiments at volcanic CO2 vents within a temperate rocky reef to show that ocean acidification can drive community reorganization through indirect and direct positive pathways. A keystone species, the algal-farming damselfish Parma alboscapularis, enhanced primary productivity through its weeding of algae whose productivity was also boosted by elevated CO2. The accelerated primary productivity was associated with increased densities of primary consumers (herbivorous invertebrates), which indirectly supported increased secondary consumers densities (predatory fish) (i.e. strengthening of bottom-up fuelling). However, this keystone species also reduced predatory fish densities through behavioural interference, releasing invertebrate prey from predation pressure and enabling a further boost in prey densities (i.e. weakening of top-down control). We uncover a novel mechanism where a keystone herbivore mediates bottom-up and top-down processes simultaneously to boost populations of a coexisting herbivore, resulting in altered food web interactions and predator populations under future ocean acidification. |
Keywords: | bottom-up processes farming ocean acidification predation prey top-down processes |
Rights: | © 2021 The Author(s) Published by the Royal Society. All rights reserved. |
DOI: | 10.1098/rspb.2021.0475 |
Grant ID: | http://purl.org/au-research/grants/arc/FT120100183 http://purl.org/au-research/grants/arc/FT0991953 http://purl.org/au-research/grants/arc/DP150104263. |
Published version: | http://dx.doi.org/10.1098/rspb.2021.0475 |
Appears in Collections: | Aurora harvest 8 Ecology, Evolution and Landscape Science publications |
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