ABSTRACT

The aims of this study were to compare the richness and the population traits of exotic and native peracarid species in two ports of the Southwestern Atlantic (Mar del Plata: MDP, Puerto Madryn: PMY), in order to discuss the vulnerability of these environments to biological invasions, to explore the current status of these assemblages and to study the life history traits that could favour the establishment of exotic species in these ports. Five biofouling samples were taken each season from 2016 to 2017. The present study showed that exotic species were dominants in both ports but profound differences were registered between environments: MDP port is characterized by the absence of native species and highest richness of exotic species (n = 7 spp.); while in PMY port two native species were registered and exotic species (n = 2 spp.) showed lower richness than MDP port. The analysis of species assemblages and life history traits allows us to discuss the potential invasive pattern of peracarids in the Southwestern Atlantic, suggesting that factors, such as propagule pressure, port infrastructure, pollution levels are closely related to the differences in vulnerability of these artificial environments to biological invasions. In addition, the population dynamics and the reproductive traits of exotic species could explain their establishment and proliferation in the marine environments studied.

摘要

这项研究的目的是比较西南大西洋两个港口（马德普拉塔：MDP，马德林港：PMY）外来和本地过软体动物物种的丰富度和种群特征，以便讨论这些环境对生物入侵，以探索这些种群的现状并研究可能有助于在这些港口建立外来物种的生活史特征。从2016年至2017年每个季节采集了五个生物污垢样品。本研究表明，两个港口均以外来物种为主导，但环境之间存在着巨大差异：MDP港口的特点是缺乏本地物种，且外来物种的丰富度最高（n = 7 spp。）；在PMY港口登记了两个本地物种，外来物种（n  = 2 spp。）的丰富度低于MDP港口。通过对物种组成和生活史特征的分析，我们可以讨论西南大西洋过水aca虫的潜在入侵方式，这表明繁殖力，港口基础设施，污染水平等因素与这些人工环境的脆弱性差异密切相关。生物入侵。此外，外来物种的种群动态和繁殖特性可以解释它们在所研究的海洋环境中的建立和繁殖。