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

IF 5.6 1区 农林科学 Q1 FISHERIES Fish and Fisheries Pub Date : 2024-03-13 DOI:10.1111/faf.12822
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
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Abstract

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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鱼类与红树林之间的联系取决于具体情况:潮汐制度和距离珊瑚礁远近决定了热带红树林的生态作用
众所周知,热带红树林支持鱼类生产,但红树林栖息地与鱼类种群之间联系的自然变化削弱了我们管理、保护和恢复这种生态关系的能力。这在很大程度上是由于鱼类在利用红树林的过程中没有明确的环境依赖性。我们通过对印度洋-太平洋地区五个环境异质性区域的红树林边缘栖息地进行标准化遥控水下视频调查,收集了 494 种红树林鱼类的广泛空间数据集。我们使用机器学习方法定义了据报道与红树林有关的鱼类使用红树林的环境限制。我们发现,潮汐范围和靠近珊瑚礁的程度是大多数分类群使用红树林的最重要的环境预测因素。我们为鱼类利用红树林的重要环境预测因子建立了数据驱动的阈值,为热带红树林在支持鱼类生活史方面发挥的不同作用提供了新的见解。在潮差有限(1.5 米)的地区,红树林作为珊瑚礁海景的一部分出现,似乎为多种珊瑚礁鱼类提供了重要的幼鱼栖息地功能。在潮差大得多的地区,红树林似乎只能支持某些具有沿岸生活史的珊瑚礁物种。沿海和河口鱼类能够在各种非珊瑚礁环境中利用红树林。我们证明,环境背景中的关键阈值可以决定红树林的功能作用,对沿岸海景中其他生境的作用具有重要影响。
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来源期刊
Fish and Fisheries
Fish and Fisheries 农林科学-渔业
CiteScore
12.80
自引率
6.00%
发文量
83
期刊介绍: Fish and Fisheries adopts a broad, interdisciplinary approach to the subject of fish biology and fisheries. It draws contributions in the form of major synoptic papers and syntheses or meta-analyses that lay out new approaches, re-examine existing findings, methods or theory, and discuss papers and commentaries from diverse areas. Focal areas include fish palaeontology, molecular biology and ecology, genetics, biochemistry, physiology, ecology, behaviour, evolutionary studies, conservation, assessment, population dynamics, mathematical modelling, ecosystem analysis and the social, economic and policy aspects of fisheries where they are grounded in a scientific approach. A paper in Fish and Fisheries must draw upon all key elements of the existing literature on a topic, normally have a broad geographic and/or taxonomic scope, and provide general points which make it compelling to a wide range of readers whatever their geographical location. So, in short, we aim to publish articles that make syntheses of old or synoptic, long-term or spatially widespread data, introduce or consolidate fresh concepts or theory, or, in the Ghoti section, briefly justify preliminary, new synoptic ideas. Please note that authors of submissions not meeting this mandate will be directed to the appropriate primary literature.
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