Ocean warming threatens key trophic interactions supporting a commercial fishery in a climate change hotspot. (3rd October 2021)

• Record Type: Journal Article
• Authors: Holland, Owen J.; Young, Mary A.; Sherman, Craig D. H.; Tan, Mun Hua; Gorfine, Harry; Matthews, Ty; Miller, Adam D.
• Is Part Of: Global change biology. Volume 27:Number 24(2021)
• Page Start: 6498
• Page End: 6511
• Publication Date: 2021-10-03
• Subjects: climate change -- DNA metabarcoding -- Haliotis rubra -- long‐term marine monitoring -- marine trophic interactions -- Phyllospora comosa; Climatic changes -- Environmental aspects -- Periodicals; Troposphere -- Environmental aspects -- Periodicals; Biodiversity conservation -- Periodicals; Eutrophication -- Periodicals; 551.5
• DOI: 10.1111/gcb.15889
• Languages: English
• ISSNs: 1354-1013

Abstract

Abstract: Worldwide, rising ocean temperatures are causing declines and range shifts in marine species. The direct effects of climate change on the biology of marine organisms are often well documented; yet, knowledge on the indirect effects, particularly through trophic interactions, is largely lacking. We provide evidence of ocean warming decoupling critical trophic interactions supporting a commercially important mollusc in a climate change hotspot. Dietary assessments of the Australian blacklip abalone ( Haliotis rubra ) indicate primary dependency on a widespread macroalgal species ( Phyllospora comosa ) which we show to be in state of decline due to ocean warming, resulting in abalone biomass reductions. Niche models suggest further declines in P . comosa over the coming decades and ongoing risks to H . rubra . This study highlights the importance of studies from climate change hotspots and understanding the interplay between climate and trophic interactions when determining the likely response of marine species to environmental changes. Abstract : We provide evidence of ocean warming decoupling critical trophic interactions supporting a commercially important mollusc in a climate change hotspot. Dietary assessments of Haliotis rubra indicate primary dependency on a widespread macroalgal species which we show to be in state of decline due to ocean warming, resulting in abalone biomass reductions. These findings highlight the importance of studies from climate change hotspots and understanding the interplay between climate and trophic interactions when determining the likely response of marine species to ocean warming.