富尔摩沙沿岸泻湖海胆斑块在增生蕨和玉村鹭入侵压力下的变化

IF 2.6 3区 地球科学 Q1 MARINE & FRESHWATER BIOLOGY
Tim Felix Hartmann , Inês Ribeiro , Duarte Duarte , Sofia Gamito
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引用次数: 0

摘要

本研究调查了葡萄牙南部阿莫纳湾附近Ria Formosa泻湖的海胆斑块中特定的底栖生物群落。这些斑块集中在不同的空间孤立区域,周围是无植被的裸露沉积物底部,并支持多种生物,以高密度和高生物量的lividus Paracentrotus和ascidian为主。2014年至2023年的野外调查显示,植物区系组成发生了变化,本土海草和海藻被入侵的巨藻藻(Caulerpa prolifera)所取代。本研究的主要目的是评估这种入侵藻类对斑块底栖生物群落的影响。然而,在2024年的调查中,在斑块中发现了另一种入侵的大型藻类,冈村Rugulopteryx okamurae。在冈村海胆斑块中,颗粒球海胆是生物量的优势种。在增生Caulerpa prolifera入侵的斑块中,一般没有海胆,也没有海鞘。区系分析表明,与冈村田鼠入侵斑块相比,蕨草入侵斑块内的大型无脊椎动物类群丰富度、丰度和生物量显著下降。非度量的多维尺度,证实了两个入侵斑块之间的差异。冈村田鼠的入侵使生态平衡复杂化,可能导致物种替代和最终的生物多样性丧失。此外,前几年观察到的这些斑块中贝壳层的消失引起了对栖息地稳定性和恢复力的关注。研究结果强调,迫切需要持续监测和管理策略,以减轻台海大型藻类入侵的生态后果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sea urchins’ patches in Ria Formosa coastal lagoon altered under invasion pressure of Caulerpa prolifera and Rugulopteryx okamurae
This study investigates specific epibenthic community in sea urchin patches from Ria Formosa lagoon, near the Armona Inlet in southern Portugal. These patches are concentrated in distinct spatially isolated areas surrounded by unvegetated, bare sediment bottom and support diverse organisms, dominated by a high density and biomass of Paracentrotus lividus and ascidians. Field surveys conducted between 2014 and 2023 revealed a shift in flora composition, with the replacement of native seagrasses and seaweed by the invasive macroalgae Caulerpa prolifera. The main aim of this study was to evaluate the effects of this invasive alga in the epibenthic communities of the patches. However, in 2024 surveys, another invasive macroalgae, Rugulopteryx okamurae, was detected in the patches. Sphaerechinus granularis was the dominant sea urchin species in biomass, in R. okamurae patches. In the patches invaded by Caulerpa prolifera, sea urchins were generally absent, as were ascidians’ species. Faunal analyses indicate a significant decline in macroinvertebrate taxa richness, abundance and biomass within Caulerpa-invaded patches, when compared with patches invaded by R. okamurae. Non-metric multidimensional scaling, confirm the observed differences between the two invaded patches. The invasion by R. okamurae complicates the ecological balance, potentially leading to species replacement and eventual biodiversity loss. Additionally, the disappearance of shell layers in these patches, observed in previous years, raises concerns about habitat stability and resilience. The findings highlight the urgent need for continuous monitoring and management strategies to mitigate the ecological consequences of macroalgal invasions in the Ria Formosa.
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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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