The fish-mangrove link is context dependent: Tidal regime and reef proximity determine the ecological role of tropical mangroves

Michael Bradley; Alexia Dubuc; Camilla V. H. Piggott; Katie Sambrook; Andrew S. Hoey; Martial Depczynski; Tim J. Langlois; Monica Gagliano; Shaun K. Wilson; Katherine Cure; Thomas H. Holmes; Glenn I. Moore; Michael Travers; Ronald Baker; Ivan Nagelkerken; Marcus Sheaves

doi:10.1111/faf.12822

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The fish-mangrove link is context dependent: Tidal regime and reef proximity determine the ecological role of tropical mangroves

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The fish-mangrove link is context dependent: Tidal regime and reef proximity determine the ecological role of tropical mangroves

Michael Bradley, Alexia Dubuc, Camilla V. H. Piggott, Katie Sambrook, Andrew S. Hoey, Martial Depczynski, Tim J. Langlois, Monica Gagliano, Shaun K. Wilson, Katherine Cure, …

Fish and fisheries (Oxford, England), Vol.25(3), pp.523-541

05/2024

DOI: https://doi.org/10.1111/faf.12822

Appears in Recent Faculty of Science and Engineering Publications

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Abstract

ecogeography

ecological value

habitat

nursery ground

RUVs

seascape

Tropical mangroves are known to support fish production, but natural variability in the link between mangrove habitats and fish populations undermines our ability to manage, conserve and restore this ecological relationship. This is largely due to undefined context-dependence in the use of mangroves by fish. We collected a spatially extensive dataset of 494 mangrove fish assemblages using standardised Remote Underwater Video surveys of mangrove edge habitats from five environmentally heterogenous regions in the Indo-Pacific. We used machine learning methods to define contextual limits of the use of mangroves by reportedly mangrove-affiliated fish. We found that tidal range and proximity to coral reefs were the most important contextual predictors of the use of mangroves by most taxa. We established data-driven threshold values for important contextual predictors of the use of mangroves by fish, offering new insights into the variable role played by tropical mangroves in supporting fish life histories. Where mangroves occur as part of reef seascapes in regions with limited tidal range (<1.5 m), they appear to serve an important juvenile habitat function for a wide spectrum of reef fish. In regions with substantially larger tidal ranges, mangroves appear to only support certain reef species with coastal life histories. Coastal and estuary fish were able to use mangroves in a wide variety of non-reef contexts. We demonstrate that key thresholds in environmental context can govern the functional role of mangroves, with strong implications for the role of other habitats in coastal seascapes.

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Title: The fish-mangrove link is context dependent: Tidal regime and reef proximity determine the ecological role of tropical mangroves
Creators: Michael Bradley - James Cook University
Alexia Dubuc - James Cook University
Camilla V. H. Piggott - University of Western Australia
Katie Sambrook - James Cook University
Andrew S. Hoey - James Cook University
Martial Depczynski - Australian Institute of Marine Science
Tim J. Langlois - University of Western Australia
Monica Gagliano - Southern Cross University
Shaun K. Wilson - University of Western Australia
Katherine Cure - Australian Institute of Marine Science
Thomas H. Holmes - University of Western Australia
Glenn I. Moore - Western Australian Museum
Michael Travers - Government of Western Australia
Ronald Baker - University of South Alabama
Ivan Nagelkerken - University of Adelaide
Marcus Sheaves - James Cook University
Publication Details: Fish and fisheries (Oxford, England), Vol.25(3), pp.523-541
Publisher: Wiley
Number of pages: 19
Grant note: Australian Centre for International Agricultural Research. Grant Number: FIS-2013-015 Holsworth Wildlife Research Endowment Centre of Excellence for Coral Reef Studies, Australian Research Council Department of Foreign Affairs and Trade, Australian Government. Grant Number: ST000K7U8 Western Australian Marine Science Institution Australian Institute of Marine Science Fisheries Research and Development Corporation. Grant Number: 2013-046 Wet Tropics Management Authority
Identifiers: 991013179912802368
Copyright: © 2024 The Authors. Fish and Fisheries published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License. Open access publishing facilitated by James Cook University, as part of the Wiley - James Cook University agreement via the Council of Australian University Librarians.
Academic Unit: Faculty of Science and Engineering; Science
Language: English
Resource Type: Journal article

The fish-mangrove link is context dependent: Tidal regime and reef proximity determine the ecological role of tropical mangroves

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