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New invasive predator reduces the abundance of native prey in a cold-temperate marine fouling community
Aquatic Conservation: Marine and Freshwater Ecosystems ( IF 2.4 ) Pub Date : 2021-08-19 , DOI: 10.1002/aqc.3681
Nicolás Battini 1, 2 , Clara B. Giachetti 1, 2 , Karen L. Castro 1, 2, 3 , Alejandro Bortolus 1, 4 , Evangelina Schwindt 1, 2
Affiliation  

  1. Invasive species threaten the conservation of marine environments, and urgent management strategies are needed to prevent their introduction, establishment and spread. Specifically, marine invasive predators destabilize ecological interactions and alter community structure and function. However, most of the evidence showing the effect of these predators is restricted to a few species and regions, while for others the information remains scarce.
  2. This study experimentally evaluated the ecological effects of the sea slug Pleurobranchaea maculata, a recently introduced invasive predator, on the fouling communities of a cold-temperate port in the South-western Atlantic.
  3. The results show that increasing predation pressure reduces significantly the abundance of sea anemones, which are among the preferred prey items.
  4. This study reveals new evidence to help better understand the effects of P. maculata on the biological communities of a recently invaded region. Furthermore, it provides the first experimental evidence supporting the hypothesis that marine invasive predators can induce a significant decrease in the abundance of native species in benthic communities of cold-temperate marine environments in the South-western Atlantic.


中文翻译:

新的入侵捕食者减少了寒冷温带海洋污染群落中本地猎物的数量

  1. 入侵物种威胁着海洋环境的保护,需要紧急的管理策略来防止它们的引入、建立和传播。具体而言,海洋入侵捕食者破坏生态相互作用并改变群落结构和功能。然而,显示这些捕食者影响的大多数证据仅限于少数物种和地区,而对于其他人来说,信息仍然很少。
  2. 这项研究通过实验评估了海蛞蝓Pleurobranchea maculata(一种最近引入的入侵性捕食者)对西南大西洋冷温带港口污染群落的生态影响。
  3. 结果表明,增加捕食压力会显着降低海葵的丰度,海葵是首选的猎物。
  4. 这项研究揭示了新的证据,有助于更好地了解P. maculata对最近入侵地区生物群落的影响。此外,它提供了第一个实验证据,支持以下假设:海洋入侵捕食者可以导致西南大西洋冷温带海洋环境底栖群落中本地物种的丰度显着减少。
更新日期:2021-10-19
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