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首页> 外文期刊>Marine biology >Differential tolerance to metals among populations of the introduced bryozoan Bugula neritina
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Differential tolerance to metals among populations of the introduced bryozoan Bugula neritina

机译：引入的苔藓虫Bugula neritina种群对金属的差异耐受性

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Resistance to heavy metals is a potentially important trait for introduced marine organisms, facilitating their successful invasion into disturbed natural communities. We conducted laboratory and field experiments to examine differential resistance to copper (Cu) between two source populations of the introduced bryozoan Bugula neritina, originating from a polluted (Port Kembla Harbour, NSW, Australia) and an unpolluted (Botany Bay, NSW, Australia) environment. A laboratory toxicity test was conducted to test the relative resistance of B. neritina recruits from the two sources, by measuring the attachment success, survival and growth of individuals exposed to a range of Cu concentrations (0, 25, 50 and 100 μg l~(-1) Cu). Upon completion, reciprocal transplantation of the colonies to the original polluted and unpolluted locations was carried out to assess ongoing survival and growth of colonies in the field. B. neritina colonies originating from the polluted Port Kembla Harbour had increased resistance to Cu relative to populations from an unpolluted part of Botany Bay. There appeared to be a cost associated with increased metal tolerance. In the laboratory, Botany Bay recruits displayed significantly higher growth in control treatments and significantly poorer growth at 100 μg l~(-1) Cu with respect to Port Kembla Harbour individuals, which showed unusually uniform and low growth irrespective of Cu concentration. No difference in attachment success or post-metamorphic survival was observed between populations. Field transplantation showed copper resistance in Port Kembla Harbour colonies constituted an advantage in polluted but not benign environments. The findings of this study provide evidence of the benefits to invasive species of pollution tolerance and suggest that human disturbance can facilitate the establishment and spread of invasive species in marine systems.
机译：对重金属的抗药性对于引进的海洋生物可能是潜在的重要特征，有助于它们成功地入侵受干扰的自然社区。我们进行了实验室和野外实验，以检查来自污染的（澳大利亚新南威尔士州的肯布拉港）和未污染的澳大利亚（新南威尔士州）的两种引入的苔藓虫Bugula neritina来源种群之间对铜（Cu）的差异电阻。环境。进行了实验室毒性测试，通过测量暴露于一定浓度（0、25、50和100μgl〜/ min的铜）的个体的附着成功率，存活率和生长率，来测试这两种来源的新孢霉的相对抗性。 （-1）铜）。完成后，将菌落相互移植到原始污染和未污染的位置，以评估田间菌落的持续存活和生长。相对于植物园湾未污染地区的种群，源自污染的肯布拉港的芥蓝菌殖民地对铜的抗性增强。似乎存在与增加的金属耐受性相关的成本。在实验室中，相对于端口Kembla港个体，植物学湾的新兵在对照处理中表现出明显更高的生长，在100μgl〜（-1）Cu下生长显着较差，无论铜浓度如何，其表现出异常均匀且低生长。人群之间的依恋成功率或后变态生存率没有差异。田间移植表明，在肯布拉港港口殖民地的铜抗性构成了在污染但非良性环境中的优势。这项研究的结果提供了证据，证明了对污染容忍的入侵物种的好处，并表明人为干扰可以促进入侵物种在海洋系统中的建立和传播。

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