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首页> 外文期刊>Marine biology >Distributional responses to marine heat waves: insights from length frequencies across the geographic range of the endemic reef fish Choerodon rubescens
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Distributional responses to marine heat waves: insights from length frequencies across the geographic range of the endemic reef fish Choerodon rubescens

机译：对海洋热浪的分布响应：特有礁鱼霍乱弧菌地理范围内长度频率的见解

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AbstractRange shifts as a result of warming oceans call for evaluation of populations at the geographic range level, particularly for highly vulnerable species such as endemics and fisheries targets. We examined the influence of latitudinal temperature gradients and temperature anomalies during a 2011 marine heat wave on range-wide abundance, length frequency and recruitment ofChoerodon rubescens, a reef associated fisheries target endemic to Western Australia. Diver-operated stereo-video surveys were conducted at shallow reefs (3–18 m) along 124 sites spanning the entire species’ distribution (21°S–34°S), to obtain abundance, length frequency and habitat data. Models were used to assess the influence of satellite-derived long-term average temperature (2002–2010) and 2011 temperature anomalies, compared to habitat, depth and distance to mainland, on the abundance of adult and juvenile fish and overall population size structure. Long-term temperature had the highest effect on adultC. rubescensabundance, with highest values recorded towards the centre of the temperature gradient investigated (22 °C). In contrast, juveniles were mostly influenced by 2011 temperature anomalies, with highest abundance recorded towards the cooler range edge, where anomalies were lowest. Length-frequency distributions showed recent recruitment towards the cooler range edge coupled with recruitment absence at the warmer edge. Recruitment differences were traced to 2011–2013 when ocean temperatures were up to 3.5 °C higher than average, via back-calculation of juvenile ages. These findings support predictions of a poleward distributional shift in response to ocean warming, and suggest that marine heatwaves can facilitate range shifts by affecting recruitment across latitudinal gradients.
机译： Abstract 由于海洋变暖而引起的范围变化，要求对地理范围的种群进行评估，特别是对特有物种和渔业目标等高度脆弱的物种。我们研究了2011年海洋热浪期间的纬度温度梯度和温度异常对范围广泛的丰度，长度频率和 Choerodon rubescens （一种与珊瑚礁有关的渔业目标特有的）的募集的影响。澳大利亚西部。在整个珊瑚礁分布范围（21°S–34°S）的124个地点的浅礁（3–18 m）上进行了由潜水员操作的立体视频调查，以获取丰度，长度频率和栖息地数据。使用模型来评估与生境，深度和与大陆的距离相比，卫星长期长期平均温度（2002-2010年）和2011年温度异常对成年和幼鱼数量和总体种群结构的影响。长期温度对成年 C的影响最大。冬凌草的丰度，在所研究温度梯度的中心（22°C）有最高记录。相比之下，少年受2011年温度异常的影响最大，丰度最高的区域偏向最低的较冷范围边缘。长度-频率分布显示最近向较凉的范围边缘募集，加上较不温暖的边缘募集。通过对未成年年龄的反算，招聘差异可追溯到2011-2013年，当时海洋温度比平均温度高3.5°C。这些发现支持了对海洋变暖的极向分布变化的预测，并表明海洋热波可以通过影响横向纬度的募集来促进距离变化。

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  • 来源
    《Marine biology》 |2018年第1期|1.1-1.14|共14页
  • 作者

    Katherine Cure; Jean-Paul A. Hobbs; Timothy J. Langlois; David A. Abdo; Scott Bennett; Euan S. Harvey;

  • 作者单位

    UWA Oceans Institute, School of Plant Biology, The University of Western Australia,Australian Institute of Marine Science;

    Department of Environment and Agriculture, Curtin University;

    UWA Oceans Institute, School of Plant Biology, The University of Western Australia;

    Biosecurity Directorate, Sustainability Division, Department of Primary Industries and Regional Development;

    Department of Global Change Research, IInstitut Mediterrani d’Estudis Avançats (Universitat de les Illes Balears – Consejo Superior de Investigaciones Científicas);

    Department of Environment and Agriculture, Curtin University;

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