Mangrove forest ecological function is influenced by the environmental settings and the benthic fauna composition

IF 2.6 3区 地球科学 Q1 MARINE & FRESHWATER BIOLOGY Estuarine Coastal and Shelf Science Pub Date : 2024-09-14 DOI:10.1016/j.ecss.2024.108959
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Abstract

Benthic communities perform many important roles within mangrove ecosystems and are responsible for facilitating many of the functions attributed to mangrove forests. For instance, they are instrumental in mediating mangrove system productivity, and provide crucial food for juvenile nekton. Despite their importance, very few studies have investigated the benthic community of mangrove forests, and among those the results are inconsistent. This variability manifests in strong location effects, with low organism density and species richness in Indo-Pacific mangroves, compared to West Atlantic sites. These regional difference are confounded by differences in within-region environmental settings (e.g. rainfall, tidal range, spatial location along the coastal mosaic), and this complicates the development of a clear understanding of underlying consistencies. To assess the influence of contrasting environmental influences on the benthic community of mangrove forests we studied the benthic community of Rhizophora stylosa forests at two coastal estuaries and along the shores of two islands within a 75 km radius. The results showed that the community composition differed among settings, with several taxa only occurring at one of the two forests type. Furthermore, Peracarida, a common prey found in the gut of juvenile fish, was only found through the island forests, but never observed within the estuarine forests. This indicates that environmental setting can play a key role in determining the nature of mangrove benthic assemblages and their potential ecological roles. Consequently, caution is required when attributing the ecological roles of mangrove forests without accounting for changes in settings. Additionally, we only investigated a single mangrove species within the same climatic region, meaning that even greater variability is likely when the full range of mangrove types, conditions and areas are assessed. Understanding this variation is important because it implies that mangrove forest restoration projects are unlikely to achieve their desired outcomes unless setting-specific conditions are understood and taken into account.

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红树林的生态功能受环境背景和底栖生物组成的影响
底栖生物群落在红树林生态系统中扮演着许多重要角色,并负责促进红树林的许多功能。例如,底栖生物群落在调解红树林系统的生产力方面起着重要作用,并为幼小的近海生物提供重要的食物。尽管底栖生物非常重要,但对红树林底栖生物群落进行调查的研究却很少,研究结果也不一致。这种差异表现为强烈的地点效应,与西大西洋地点相比,印度洋-太平洋红树林的生物密度和物种丰富度较低。这些区域差异又受到区域内环境(如降雨量、潮差、沿岸镶嵌的空间位置)差异的影响,这就使清楚地了解潜在的一致性变得更加复杂。为了评估不同环境对红树林底栖生物群落的影响,我们研究了两个沿海河口和两个岛屿沿岸 75 千米半径范围内的红树林底栖生物群落。结果表明,不同环境下的群落组成各不相同,有几个类群只出现在两种森林类型中的一种。此外,幼鱼肠道中常见的猎物--鲈形目鱼类(Peracarida)只在岛屿森林中发现,而在河口森林中却从未观察到。这表明,环境背景在决定红树林底栖生物群的性质及其潜在生态作用方面起着关键作用。因此,在不考虑环境变化的情况下,对红树林的生态作用进行归因时需要谨慎。此外,我们只调查了同一气候区域内的单一红树林物种,这意味着在对所有红树林类型、条件和区域进行评估时,可能会出现更大的变异。了解这种差异非常重要,因为这意味着除非了解并考虑到特定环境条件,否则红树林恢复项目不可能取得预期成果。
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来源期刊
CiteScore
5.60
自引率
7.10%
发文量
374
审稿时长
9 months
期刊介绍: Estuarine, Coastal and Shelf Science is an international multidisciplinary journal devoted to the analysis of saline water phenomena ranging from the outer edge of the continental shelf to the upper limits of the tidal zone. The journal provides a unique forum, unifying the multidisciplinary approaches to the study of the oceanography of estuaries, coastal zones, and continental shelf seas. It features original research papers, review papers and short communications treating such disciplines as zoology, botany, geology, sedimentology, physical oceanography.
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