文章摘要
南极半岛海域南极磷虾资源时空分布格局及尺度研究
Spatial and Temporal Distribution pattern and scale of Antarctic krill (Euphausia superba) density distribution in the Antarctic Peninsula
投稿时间:2020-08-04  修订日期:2021-02-01
DOI:
中文关键词: 南极磷虾  南极半岛  特征空间尺度  空间自相关
英文关键词: Euphausia superba  Antarctic Peninsula  characteristic spatial scale  spatial autocorrelation
基金项目:国家自然科学基金项目(41776185);国家重点研发计划项目(2018YFC1406801)
作者单位邮编
刘慧 上海海洋大学海洋科学学院 201306
朱国平 大洋渔业资源可持续开发教育部重点实验室极地海洋生态系统研究室
大洋渔业资源可持续开发教育部重点实验室极地海洋生态系统研究室
上海海洋大学海洋科学学院 
201306
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中文摘要:
      生物资源分布格局依赖于空间尺度,不适宜的尺度可能会产生误导性的结果。作为南极生态系统的关键物种,南极磷虾的资源分布存在着极为显著的时空异质性,分布格局难以预测。为此,本研究利用科学调查数据,以5′为间隔将数据处理为5′×5′至60′×60′等12个空间尺度,从而针对南极磷虾资源主要分布区的南极半岛开展多尺度分析,并计算不同空间尺度下南极磷虾资源密度分布的Moran's I指数。结果表明,不同空间尺度下南极磷虾资源密度分布的空间格局存在着差异,其中11个空间尺度下的南极磷虾资源密度分布均呈现出聚集趋势。通过Moran's I指数与空间尺度的相关图确定了南极磷虾资源密度分布的特征空间尺度为25′×25′(以Moran's I指数首次穿过y=0所对应的尺度确定)和15′×15′(相关图与Moran's I指数为零时无显著差异的最小尺度确定),并建议将15′×15′作为该区域南极磷虾资源分布研究的最适空间尺度。
英文摘要:
      Distribution pattern of living resources depend on the spatial scale, but an inappropriate scale may produce misleading results. As a key species in the Antarctic ecosystem, distribution of Antarctic krill (Euphausia superba) demonstrates significantly spatial-temporal heterogeneity. Therefore, the distribution pattern of this species can be predicted effectively. Based on scientific survey data collected from the Antarctic Peninsula, the main distributional region of krill, this study preprocessed the data into 12 spatial scales (5′×5′ - 60′×60′) at 5′ intervals of latitude and longitude for multi-scale analysis, and the Moran's I index of krill density distribution at different spatial scales was also calculated. The results showed that the spatial pattern of krill is differed in spatial scales, and the density distribution of krill showed a clustering trend at 11 spatial scales. According to the correlogram between Moran's I index and spatial scale, the characteristic spatial scales of krill density distribution were determined as 25 ′× 25 ′ (the spatial scale that the value of Moran's I index is across the line where y = 0) and 15 ′× 15 ′ (the spatial scale is corresponds to the smallest value at the Moran's I index is not different significantly from zero), respectively. It was suggested that 15 ′× 15 ′ could be the optimum spatial scale for studying the distribution of krill density in this region.
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