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首页> 外文期刊>Marine ecology progress series >Distributions of krill and Antarctic silverfish and correlations with environmental variables in the western Ross Sea, Antarctica
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Distributions of krill and Antarctic silverfish and correlations with environmental variables in the western Ross Sea, Antarctica

机译：南极罗斯海西部磷虾和南极银鱼的分布及其与环境变量的关系

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摘要

Antarctic krill Euphausia superba, crystal krill E. crystallorophias, and Antarctic silverfish Pleuragramma antarctica are key mid-trophic level species in the Ross Sea, connecting primary production to the upper trophic levels. Distributions of these species were constructed from observations made in the western Ross Sea from 1988 to 2004. Distributions of environmental conditions were obtained from a 5-km resolution circulation model (temperature, mixed layer depth, surface speed) and satellite-derived observations (chlorophyll, sea ice cover). A hierarchy of statistical methods determined correlations and relationships between species and environmental conditions. Each species occupies a localized habitat defined by different environmental characteristics. Antarctic krill are concentrated along the northwestern shelf break in a habitat characterized by deep (>1000 m) bottom depth, warm temperature (1 to 1.25 degrees C), decreased sea ice, and proximity to the shelf break. Crystal krill and Antarctic silverfish are concentrated in Terra Nova Bay. Common characteristics of the habitat for these species are southwesterly location, coastal proximity, and cold temperature (-1.75 to -2 degrees C). The habitat characteristics obtained for the 3 species provide a basis for projecting potential distribution changes in response to environmental change and for delineating regions of the Ross Sea for focused management and selection of marine protected areas that support ecosystem-level conservation plans.
机译：南极磷虾Euphausia superba，南极磷虾E. crystallorophias和南极银鱼Pleuragramma antarctica是罗斯海的关键中营养级物种，将初级生产与营养级联系起来。这些物种的分布是根据1988年至2004年在罗斯海西部的观测结果构建的。环境条件的分布是从5 km分辨率的环流模型（温度，混合层深度，表面速度）和卫星观测（叶绿素）获得的，海冰盖）。统计方法的层次结构确定了物种与环境条件之间的相关性和关系。每个物种都占有一个由不同环境特征定义的局部栖息地。南极磷虾集中在西北陆架断裂带的一个栖息地中，该栖息地的特征是深（> 1000 m）的底部深度，温暖的温度（1至1.25摄氏度），海冰减少以及靠近陆架断裂。水晶磷虾和南极银鱼集中在Terra Nova湾。这些物种的栖息地的共同特征是西南位置，沿海附近和低温（-1.75至-2摄氏度）。为这3个物种获得的栖息地特征为预测潜在的分布变化以响应环境变化提供了基础，并为罗斯海的划定区域提供了基础，以集中管理和选择支持生态系统级保护计划的海洋保护区。

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