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Investigating the cumulative effects of multiple stressors on fish assemblages in a semi-enclosed bay

机译：研究半封闭式海湾鱼组合对多重压力源的累积效应

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摘要

The growing intensity of anthropogenic activities has led to an increase in the number of studies assessing the effects of stressors on marine ecosystems. Yet, the cumulative effects of multiple stressors are rarely studied although they seldom operate in isolation of each other. Our study aimed to investigate the effects of multiple stressors on fish assemblages in a series of semi-enclosed bays. We quantified fish assemblages using baited remote underwater video across five sites with varying environmental and anthropogenic stressors. We also sampled across two seasons and in protected and unprotected areas. We found that fish assemblages were most influenced by effluent input and aquaculture, but not fishing pressure. Relief, season, salinity, and pH were also included in the best model highlighting the importance of environmental variables in structuring fish assemblages. Total abundance was not affected by anthropogenic stressors but individual species showed variable responses from reduced abundance (e.g.Neoodax balteatusandCyanea rosella) to increased abundances (e.g.Arripisspp.). We found no evidence that increased number or intensity of stressors affected overall fish abundance or diversity. Our findings highlight the diverse effects anthropogenic stressors can have on fishes with both environmental and anthropogenic influences playing a role in structuring fish assemblages over both short temporal and spatial scales.
机译：人体生成活动的不断增长的强度导致评估压力源对海洋生态系统的影响的研究数量增加。然而，很少研究多重压力源的累积效果，尽管它们很少在彼此隔离操作。我们的研究旨在调查多次压力源对一系列半封闭式海湾鱼组合的影响。我们在具有不同环境和人为压力源的五个地点使用占遥远的远程水下视频量化的鱼组合。我们还在两个季节和受保护和未受保护的地区进行了抽样。我们发现鱼组合受到污水投入和水产养殖的影响最大，但不会钓鱼压力。浮雕，季节，盐度和pH也包括在最佳模型中，突出了环境变量在结构性鱼组合中的重要性。总丰度不受人为压力源的影响，但个体种类显示出从降低丰度（例如，例如，例如，aripisspp）增加丰度（例如，例如aripisspp。）的可变反应。我们发现没有证据表明，压力源的数量或强度增加了整体鱼丰度或多样性。我们的研究结果突出了各种效果人类诱导助力源可以对环境和人为的影响在于在短时间和空间尺度上扮演结构性的鱼组合中的作用。

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  • 来源
    《Marine biology》 |2020年第11期|171.1-171.13|共13页
  • 作者

    Whitmarsh Sasha K.; Huveneers Charlie; Fairweather Peter G.;

  • 作者单位

    Flinders Univ S Australia Coll Sci & Engn Adelaide SA Australia;

    Flinders Univ S Australia Coll Sci & Engn Adelaide SA Australia;

    Flinders Univ S Australia Coll Sci & Engn Adelaide SA Australia;

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