Climate-driven shift in coral morphological structure predicts decline of juvenile reef fishes

Luisa Fontoura, Kyle J.A. Zawada, Stephanie D’agata, Mariana Álvarez-Noriega, Andrew H. Baird, Nader Boutros, Maria Dornelas, Osmar J. Luiz, Joshua S. Madin, Joseph M. Maina, Oscar Pizarro, Damaris Torres-Pulliza, Rachael M. Woods, Elizabeth M.P. Madin

    Research output: Contribution to journalArticle

    Abstract

    Rapid intensification of environmental disturbances has sparked widespread decline and compositional shifts in foundation species in ecosystems worldwide. Now, an emergent challenge is to understand the consequences of shifts and losses in such habitat-forming species for associated communities and ecosystem processes. Recently, consecutive coral bleaching events shifted the morphological makeup of habitat-forming coral assemblages on the Great Barrier Reef (GBR). Considering the disparity of coral morphological growth forms in shelter provision for reef fishes, we investigated how shifts in the morphological structure of coral assemblages affect the abundance of juvenile and adult reef fishes. We used a temporal dataset from shallow reefs in the northern GBR to estimate coral convexity (a fine-scale quantitative morphological trait) and two widely used coral habitat descriptors (coral cover and reef rugosity) for disentangling the effects of coral morphology on reef fish assemblages. Changes in coral convexity, rather than live coral cover or reef rugosity, disproportionately affected juvenile reef fishes when compared to adults, and explained more than 20% of juvenile decline. The magnitude of this effect varied by fish body size with juveniles of small-bodied species showing higher vulnerability to changes in coral morphology. Our findings suggest that continued large-scale shifts in the relative abundance of morphological groups within coral assemblages are likely to affect population replenishment and dynamics of future reef fish communities. The different responses of juvenile and adult fishes according to habitat descriptors indicate that focusing on coarse-scale metrics alone may mask fine-scale ecological responses that are key to understand ecosystem functioning and resilience. Nonetheless, quantifying coral morphological traits may contribute to forecasting the structure of reef fish communities on novel reef ecosystems shaped by climate change.

    Original languageEnglish
    Pages (from-to)557-567
    Number of pages11
    JournalGlobal Change Biology
    Volume26
    Issue number2
    Early online date7 Nov 2019
    DOIs
    Publication statusPublished - Feb 2020

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    Reefs
    Fish
    coral
    reef
    climate
    fish
    Ecosystems
    ecosystem
    habitat
    barrier reef
    coral bleaching
    environmental disturbance
    growth form
    Bleaching
    Climate change
    shelter
    Masks
    relative abundance
    body size
    vulnerability

    Cite this

    Fontoura, L., Zawada, K. J. A., D’agata, S., Álvarez-Noriega, M., Baird, A. H., Boutros, N., ... Madin, E. M. P. (2020). Climate-driven shift in coral morphological structure predicts decline of juvenile reef fishes. Global Change Biology, 26(2), 557-567. https://doi.org/10.1111/gcb.14911
    Fontoura, Luisa ; Zawada, Kyle J.A. ; D’agata, Stephanie ; Álvarez-Noriega, Mariana ; Baird, Andrew H. ; Boutros, Nader ; Dornelas, Maria ; Luiz, Osmar J. ; Madin, Joshua S. ; Maina, Joseph M. ; Pizarro, Oscar ; Torres-Pulliza, Damaris ; Woods, Rachael M. ; Madin, Elizabeth M.P. / Climate-driven shift in coral morphological structure predicts decline of juvenile reef fishes. In: Global Change Biology. 2020 ; Vol. 26, No. 2. pp. 557-567.
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    abstract = "Rapid intensification of environmental disturbances has sparked widespread decline and compositional shifts in foundation species in ecosystems worldwide. Now, an emergent challenge is to understand the consequences of shifts and losses in such habitat-forming species for associated communities and ecosystem processes. Recently, consecutive coral bleaching events shifted the morphological makeup of habitat-forming coral assemblages on the Great Barrier Reef (GBR). Considering the disparity of coral morphological growth forms in shelter provision for reef fishes, we investigated how shifts in the morphological structure of coral assemblages affect the abundance of juvenile and adult reef fishes. We used a temporal dataset from shallow reefs in the northern GBR to estimate coral convexity (a fine-scale quantitative morphological trait) and two widely used coral habitat descriptors (coral cover and reef rugosity) for disentangling the effects of coral morphology on reef fish assemblages. Changes in coral convexity, rather than live coral cover or reef rugosity, disproportionately affected juvenile reef fishes when compared to adults, and explained more than 20{\%} of juvenile decline. The magnitude of this effect varied by fish body size with juveniles of small-bodied species showing higher vulnerability to changes in coral morphology. Our findings suggest that continued large-scale shifts in the relative abundance of morphological groups within coral assemblages are likely to affect population replenishment and dynamics of future reef fish communities. The different responses of juvenile and adult fishes according to habitat descriptors indicate that focusing on coarse-scale metrics alone may mask fine-scale ecological responses that are key to understand ecosystem functioning and resilience. Nonetheless, quantifying coral morphological traits may contribute to forecasting the structure of reef fish communities on novel reef ecosystems shaped by climate change.",
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    Fontoura, L, Zawada, KJA, D’agata, S, Álvarez-Noriega, M, Baird, AH, Boutros, N, Dornelas, M, Luiz, OJ, Madin, JS, Maina, JM, Pizarro, O, Torres-Pulliza, D, Woods, RM & Madin, EMP 2020, 'Climate-driven shift in coral morphological structure predicts decline of juvenile reef fishes', Global Change Biology, vol. 26, no. 2, pp. 557-567. https://doi.org/10.1111/gcb.14911

    Climate-driven shift in coral morphological structure predicts decline of juvenile reef fishes. / Fontoura, Luisa; Zawada, Kyle J.A.; D’agata, Stephanie; Álvarez-Noriega, Mariana; Baird, Andrew H.; Boutros, Nader; Dornelas, Maria; Luiz, Osmar J.; Madin, Joshua S.; Maina, Joseph M.; Pizarro, Oscar; Torres-Pulliza, Damaris; Woods, Rachael M.; Madin, Elizabeth M.P.

    In: Global Change Biology, Vol. 26, No. 2, 02.2020, p. 557-567.

    Research output: Contribution to journalArticle

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    AU - Baird, Andrew H.

    AU - Boutros, Nader

    AU - Dornelas, Maria

    AU - Luiz, Osmar J.

    AU - Madin, Joshua S.

    AU - Maina, Joseph M.

    AU - Pizarro, Oscar

    AU - Torres-Pulliza, Damaris

    AU - Woods, Rachael M.

    AU - Madin, Elizabeth M.P.

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    Fontoura L, Zawada KJA, D’agata S, Álvarez-Noriega M, Baird AH, Boutros N et al. Climate-driven shift in coral morphological structure predicts decline of juvenile reef fishes. Global Change Biology. 2020 Feb;26(2):557-567. https://doi.org/10.1111/gcb.14911