近百年来南极磷虾分布冷热点的时空变动

doi:10.13287/j.1001-9332.202003.019

应用生态学报 ›› 2020, Vol. 31 ›› Issue (3): 1015-1022.doi: 10.13287/j.1001-9332.202003.019

近百年来南极磷虾分布冷热点的时空变动

刘慧^1,2,3, 朱国平^1,2,3,4*

¹上海海洋大学海洋科学学院, 上海 201306;
²上海海洋大学极地研究中心, 上海 201306;
³上海海洋大学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 201306;
⁴国家远洋渔业工程技术研究中心, 上海 210306

收稿日期:2019-08-06 出版日期:2020-03-15 发布日期:2020-03-15
通讯作者: E-mail: gpzhu@shou.edu.cn
作者简介:刘慧,女,1996年生。硕士研究生,主要从事海洋生物学研究。E-mail: hui.liu_blue@foxmail.com
基金资助:
本文由国家自然科学基金项目(41776185)和国家重点研发计划项目(2018YFC1406801)资助

Spatial-temporal variation in hotspot and coldspot of Antarctic krill distribution in recent 100 years

LIU Hui^1,2,3, ZHU Guo-ping^1,2,3,4*

¹College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
²Center for Polar Research, Shanghai Ocean University, Shanghai 201306, China;
³Polar Marine Ecosystem Laboratory, Ministry of Education Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Shanghai 201306, China;
⁴National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China

Received:2019-08-06 Online:2020-03-15 Published:2020-03-15
Contact: E-mail: gpzhu@shou.edu.cn
Supported by:
The work was supported by the National Natural Science Foundation of China (41776185) and National Key R&D Program of China (2018YFC1406801)

摘要/Abstract

摘要： 为了分析南极磷虾分布时空格局的长期变动,利用1926—2016年南极磷虾密度数据,通过Getis-Ord G_i^*统计法和不规则三角网方法对该资源时空分布进行了热点分析,并比较了10年际热(冷)点的磷虾丰度、磷虾丰度占比以及热(冷)点区的面积,分析了热(冷)点区的时空变化。结果表明: 1926—1935年、1936—1945年均各存在1个核心热点区、次热点区和边缘热点区;1976—1985年各存在1个核心热点区、次热点区和边缘热(冷)点区;1986—1995年各存在2个核心热点区、次热点区、边缘热点区和1个次冷点区、边缘冷点区;1996—2005年各存在2个核心热点区、次热(冷)点区和边缘热(冷)点区;2006—2016年各存在2个次热点区、边缘热点区和1个次冷点区、边缘冷点区。这些热(冷)点多出现在南桑威奇群岛、南极半岛和普里兹湾西侧等周边海域。各年代热(冷)点的空间分布存在较大的差异,研究期间(1926—2016年)热点区内磷虾丰度、磷虾丰度占比以及面积总体上呈降低趋势,而冷点区内磷虾丰度、磷虾丰度占比呈现上升趋势,冷点区面积呈现下降趋势。通过构建不规则三角网测度热(冷)点范围大小,并采用95%置信度的热点分析是进行南极磷虾资源时空格局变动研究的可行方法。

Abstract: To analyze the long-term variation in the spatial-temporal patterns of Antarctic krill (Euphausia superba) distribution, based on krill density data collected from 1926 to 2016, we analyzed the spatial and temporal variation of krill using the Getis-Ord G_i^* statistic and the Triangulated Irregular Network (TIN) model. We compared the krill abundance, the percentage of krill abundance, and the size of hotspot/coldspot area. The results showed that there were one core hot-spot area, one sub-hotspot area and one edge hotspot area from 1926 to 1935 and from 1936 to 1945; one core hotspot area, one sub-hotspot area and one edge hotspot/coldspot area from 1976 to 1985; two core hotspot areas, two sub-hotspot areas, two edge hotspot areas, one sub-coldspot area and one coldspot area from 1986 to 1995; two core hotspot areas, two sub-hotspot/sub-coldspot areas and two edge hotspot/coldspot areas from 1996 to 2005; and from 2006 to 2016, there were two sub-hotspot areas, two edge hotspot areas, one sub-coldspot area and one edge coldspot area, respectively. Those hotspots/coldspots mostly occurred in the South Sandwich Islands, the Antarctic Peninsula, and the west of the Prydz Bay. From 1926 to 2016, krill abundance, the percentage of krill abundance in the hotspot area and the size of hotspot area had generally reduced, but the percentage of krill abundance in coldspot area and the size of coldspot area were increasing, while krill abundance in coldspot area decreased. It is a feasible approach to build an irregular triangle network to measure the size of hotspot/coldspot area and utilize hotspot analysis with 95% confidence to analyze the spatial-temporal pattern of krill distribution.

刘慧, 朱国平. 近百年来南极磷虾分布冷热点的时空变动[J]. 应用生态学报, 2020, 31(3): 1015-1022.

LIU Hui, ZHU Guo-ping. Spatial-temporal variation in hotspot and coldspot of Antarctic krill distribution in recent 100 years[J]. Chinese Journal of Applied Ecology, 2020, 31(3): 1015-1022.

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近百年来南极磷虾分布冷热点的时空变动

Spatial-temporal variation in hotspot and coldspot of Antarctic krill distribution in recent 100 years

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