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Reef fish carbonate production assessments highlight regional variation in sedimentary significance


Salter, MA and Perry, CT and Stuart-Smith, RD and Edgar, GJ and Wilson, RW and Harborne, AR, Reef fish carbonate production assessments highlight regional variation in sedimentary significance, Geology, 46, (8) pp. 699-702. ISSN 0091-7613 (2018) [Refereed Article]


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Copyright 2018 the Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

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DOI: doi:10.1130/G45286.1


Recent studies show that all marine bony fish produce mud-sized (<63 μm) carbonate at rates relevant to carbonate sediment budgets, thus adding to the debate about the often enigmatic origins of fine-grained marine carbonates. However, existing production data are geographically and taxonomically limited, and because different fish families are now known to produce different carbonate polymorphs an issue relevant to predicting their preservation potential these limitations represent an important knowledge gap. Here we present new data from sites in the Western Pacific Ocean, based on an analysis of 45 fish species. Our data show that previously reported production outputs (in terms of rates and family-specific mineralogies) are applicable across different biogeographic regions. On this basis, we model carbonate production for nine coral reef systems around Australia, with production rates averaging 2.19.6 g m2 yr1, and up to 105 g m2 yr1 at discrete sites with high fish biomass. With projected production rates on lower-latitude reefs up to two-fold higher, these outputs indicate that carbonate production rates by fish can be comparable with other fine-grained carbonate-producing taxa such as codiacean algae. However, carbonates produced by Australian reef fish assemblages are dominated by a highly unstable amorphous polymorph; a marked contrast to Caribbean assemblages in which Mg calcite dominates. These findings highlight important regional differences in the sedimentary relevance and preservation potential of fish carbonates as a function of historical biogeographic processes that have shaped the world's marine fish faunas.

Item Details

Item Type:Refereed Article
Keywords:Reef Life Survey, chemistry, reef fish, citizen science
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Stuart-Smith, RD (Dr Rick Stuart-Smith)
UTAS Author:Edgar, GJ (Professor Graham Edgar)
ID Code:127235
Year Published:2018
Web of Science® Times Cited:9
Deposited By:Ecology and Biodiversity
Deposited On:2018-07-18
Last Modified:2018-11-15
Downloads:69 View Download Statistics

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