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首页> 外文期刊>Revista de Biologia Marina y Oceanografia >Suitable habitat for marine mammals during austral summer in San Jorge Gulf, Argentina
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Suitable habitat for marine mammals during austral summer in San Jorge Gulf, Argentina

机译：夏季在阿根廷圣豪尔赫湾的海洋哺乳动物的合适栖息地

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The San Jorge Gulf (SJG) is an important oceanographic region due to the influence of two tidal fronts, being one of the most productive sectors and with greater marine biodiversity in the Argentine Sea. The aim of this study was to identify which oceanographic variables best explained the presence of marine mammals and to explore the overlap of the predicted richness with the frontal areas of the SJG during the austral summer. The potential distribution of 9 species (Balaenoptera sp., Cephalorhynchus commersonii, Globicephala melas, Grampus griseus, Lagenorhynchus australis, L. obscurus, Mirounga leonina, Orcinus orca, Otaria flavescens) was modeled with Maxent using 6 environmental variables (bathymetry, seafloor slope, distance to the coast, distance to the frontal area, sea surface temperature and chlorophyll a concentration). Marine mammals were found closer to the frontal area than expected by chance (9.48 km and 13.34 km, respectively). Bathymetry, distance to the coast and seafloor slope were the most important variables in the distribution of all the species. Balaenoptera sp., G. melas, G. griseus, L. australis and O. orca showed a coastal distribution (M. leonina, O. flavescens and C. commersonii followed the isobaths of 80 m, while L. obscurus evenly distributed throughout the gulf. In general, the environmental variables that influence the distribution of these species agreed with those found in previous studies from other locations. The area of high predicted richness was 75% overlapped with the frontal areas located in the northwest and southeast of the gulf. This work provides baseline information for designing future samplings that could explain the influence of the processes and the seasonal variation of the distribution of the marine mammals of the SGJ.
机译：由于两个潮汐锋面的影响，圣豪尔赫湾（SJG）是重要的海洋学地区，这是阿根廷海域中生产力最高的地区之一，海洋生物多样性更高。这项研究的目的是确定哪个海洋变量最能解释海洋哺乳动物的存在，并探索南方夏季期间预测的丰富度与SJG额叶区域的重叠。利用Maxent对6种环境变量（水深比重法，水深比重法，海底气压计，到海岸的距离，到额叶的距离，海面温度和叶绿素a浓度）。发现海洋哺乳动物比额度更接近额叶区域（分别为9.48 km和13.34 km）。在所有物种的分布中，测深法，到海岸的距离和海底坡度是最重要的变量。 Balaenoptera sp。，G。melas，G。griseus，L。australis和O.orca呈沿海分布（M. leonina，O。flavescens和C. commersonii遵循等高线80 m，而Obscurus则均匀分布在整个总的来说，影响这些物种分布的环境变量与先前在其他地方进行的研究结果一致，高预测丰富度的区域与位于海湾西北和东南部的额叶区域重叠了75％。这项工作为设计未来的采样提供了基线信息，可以解释该过程的影响以及SGJ海洋哺乳动物分布的季节性变化。

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