The evolution of traits and functions in herbivorous coral reef fishes through space and time

Siqueira, Alexandre C., Bellwood, David R., and Cowman, Peter F. (2019) The evolution of traits and functions in herbivorous coral reef fishes through space and time. Proceedings of the Royal Society B, Biological Sciences, 286 (1897). 20182672.

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Herbivory by fishes has been identified as a key ecological process shaping coral reefs through time. Although taxonomically limited, herbivorous reef fishes display a wide range of traits, which results in varied ecosystem functions on reefs around the world. Yet, we understand little about how these trait combinations and functions in ecosystems changed through time and across biogeographic realms. Here, we used fossils and phylogenies in a functional ecological framework to reveal temporal changes in nominally herbivorous fish assemblages among oceanic basins in both trait space and lineage richness among functions. We show that the trait space occupied by extant herbivorous fishes in the Indo-Pacific resulted from an expansion of traits from the ancestral Tethyan assemblages. By contrast, trait space in the Atlantic is the result of lineage turnover, with relatively recent colonization by lineages that arose in the east Tethys/Indo-Pacific. From an ecosystem function perspective, the Atlantic supports a depauperate fauna, with few extant herbivorous reef fish lineages performing each function. Indo-Pacific fishes support both more functions and more lineages within each function, with a marked Miocene to Pleistocene expansion. These disparities highlight the importance of history in explaining global variation in fish functional composition on coral reefs.

Item ID: 58406
Item Type: Article (Research - C1)
ISSN: 1471-2954
Keywords: parrotfishes, surgeonfishes, rabbitfishes, algal turf removal, macroalgae removal, bioerosion
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Copyright Information: © 2019 The Author(s) Published by the Royal Society. All rights reserved.
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A version of this publication was included as Chapter 4 of the following PhD thesis: Siqueira Correa, Alexandre (2020) The evolution, macroecology and biogeography of coral reef fishes: a trophic perspective. PhD thesis, James Cook University, which is available Open Access in ResearchOnline@JCU. Please see the Related URLs for access.

Funders: Australian Research Council (ARC), James Cook University (JCU)
Projects and Grants: JCU Postgraduate Research Scholarship
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Date Deposited: 29 May 2019 07:36
FoR Codes: 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310403 Biological adaptation @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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