Mangroves reduce the vulnerability of coral reef fisheries to habitat degradation.,PLOS Biology

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Mangroves reduce the vulnerability of coral reef fisheries to habitat degradation.
PLOS Biology ( IF 7.8 ) Pub Date : 2019-11-12 , DOI: 10.1371/journal.pbio.3000510
Alice Rogers ₁ , Peter J Mumby ₂

Affiliation

Despite general and wide-ranging negative effects of coral reef degradation on reef communities, hope might exist for reef-associated predators that use nursery habitats. When reef structural complexity is lost, refuge density declines and prey vulnerability increases. Here, we explore whether the presence of nursery habitats can promote high predator productivity on degraded reefs by mitigating the costs of increased vulnerability in early life, whilst allowing for the benefits of increased food availability in adulthood. We apply size-based ecosystem models of coral reefs with high and low structural complexity to predict fish biomass and productivity in the presence and absence of mangrove nurseries. Our scenarios allow us to elucidate the interacting effects of refuge availability and ontogenetic habitat shifts for fisheries productivity. We find that low complexity, degraded reefs with nurseries can support fisheries productivity that is equal to or greater than that in complex reefs that lack nurseries. We compare and validate model predictions with field data from Belize. Our results should inform reef fisheries management strategies and protected areas now and into the future.

中文翻译：

红树林减少了珊瑚礁渔业对生境退化的脆弱性。

尽管珊瑚礁退化对珊瑚礁群落产生了广泛而广泛的负面影响，但与珊瑚礁相关的利用苗圃栖息地的捕食者仍可能存在希望。当珊瑚礁结构的复杂性丧失时，避难所密度就会下降，猎物的脆弱性也会增加。在这里，我们探索苗圃栖息地的存在是否可以通过减轻早期生活中脆弱性增加的成本，同时增加成年食物可获得性的好处，来提高退化珊瑚礁的捕食者生产力。我们使用具有大小复杂性的珊瑚礁的基于大小的生态系统模型来预测在存在和不存在红树林苗圃的情况下鱼类的生物量和生产力。我们的方案使我们能够阐明避难所的可利用性与个体发生的栖息地转移对渔业生产力的相互作用。我们发现，低复杂性，带苗圃的退化珊瑚礁可以支持等于或大于缺少苗圃的复杂珊瑚礁的渔业生产力。我们将伯利兹的实地数据与模型预测进行比较和验证。我们的结果将为现在和将来的珊瑚礁渔业管理策略和保护区提供信息。

更新日期：2019-12-03

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