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首页> 外文期刊>Marine ecology >The putative impacts of the non-native seaweed Sargassum muticum on native communities in tidepools of Southern California and investigation into the feasibility of local eradication
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The putative impacts of the non-native seaweed Sargassum muticum on native communities in tidepools of Southern California and investigation into the feasibility of local eradication

机译：非本地海藻Sargassum muticum对南加州潮池中本地社区的推定影响以及对当地根除可行性的调查

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The ecological impacts of introduced seaweeds have been relatively understudied. Current research suggests that seaweed invasions often result in alterations of native marine communities and disruptions of normal ecosystem functioning, but the effects on native communities can vary among invasive seaweed species, among habitats and over small and large spatial scales. In this study, the impacts of Sargassum muticum, a non-native brown alga introduced into southern California, USA, several decades ago, were examined by comparing community structure in rocky inter-tidal pools with and without the seaweed. Sargassum muticum appeared to have little impact on the native community despite measures revealing changes in the abiotic conditions of pools, with S. muticum presence reducing light penetration and ameliorating pool temperature changes during low tides. In other regions and habitat types, S. muticum presence often, but not consistently, resulted in declines in macrophyte diversity and/or abundance and increases in faunal assemblages. The lack of effects of S. muticum in this study, combined with variable impacts by S. muticum and other invasive seaweeds worldwide, suggests that predicting the effects of introduced seaweeds is problematic and warrants further research. Regardless of the effects on native communities, there is often a desire to eradicate or control the spread of non-native seaweeds. In this study, localized S. muticum eradication attempts, including manipulations of a native canopy and herbivorous urchins, proved unsuccessful as full recovery occurred in ~9months. While eradication efforts conducted worldwide have resulted in mixed success, there is a trend that early detection and rapid response can increase success, highlighting a need for systematic monitoring and establishment of regional rapid response plans.
机译：引入海藻对生态的影响已被相对研究不足。当前的研究表明，海藻的入侵通常会导致本地海洋群落的改变和正常生态系统功能的破坏，但是对本土社区的影响在入侵的海藻物种之间，栖息地之间以及在大小空间上都可能有所不同。在这项研究中，通过比较有或没有海藻的潮间岩石池中的群落结构，研究了数十年前引入美国加利福尼亚南部的非原生褐藻Sargassum muticum的影响。尽管有措施揭示了水池非生物条件的变化，但Sargassum muticum似乎对本地社区影响不大，而黏液链球菌的存在减少了潮汐时光的穿透并改善了水池温度的变化。在其他地区和生境类型中，粘液链球菌的存在经常但并非始终如一，导致大型植物多样性和/或丰度下降，动物群落增加。在这项研究中缺乏沙门氏菌的影响，再加上沙门氏菌和全球其他入侵性海藻的各种影响，表明预测引入的海藻的影响是有问题的，值得进一步研究。无论对土著社区的影响如何，通常都希望消除或控制非本地海藻的扩散。在这项研究中，由于在约9个月内发生了完全恢复，因此无法成功地进行局部消灭沙门氏菌的尝试，包括操纵天然树冠和草食性海胆。尽管在全球范围内进行的根除努力取得了不同程度的成功，但有一种趋势，即早期发现和快速反应可以增加成功，这突出表明需要系统地监测和制定区域快速反应计划。

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