节点文献
东黄海沙海蜇时空分布格局演变的初步研究
Preliminary research on the spatial-temporal evolution of distribution Pattern of Nemopilemanomuraiin the Yellow Sea and East China Sea
【Author】 LIU Zunlei;JIN yan;LI jiansheng;LING Jianzhong;CHENG Jiahua;East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;
【机构】 农业部东海与远洋渔业资源开发利用重点实验室东海水产研究所中国水产科学研究院;
【摘要】 本研究基于2006-2015年秋季东黄海沙海蜇监测数据,采用重心、惯量、各向同性和铺展面积空间统计指标,分析研究了沙海蜇的空间群聚中心、地理分布范围和扩散方向,及其与环境条件的关联,以揭示沙海蜇的空间迁移变化规律及其成因。结果显示:2006-2015年沙海蜇分布重心呈远离陆架、南向迁移的趋势。扩散方向从偏好单一方向扩散发展为四周扩散模式。空间铺展面积随时间变化表现为波动上升的趋势,2006年最小,2015年最大。分布重心在经向上与底温、表盐和底盐关系密切,底温和表盐增加会导致重心向岸偏移,底盐在中盐时表现为离岸偏移,高盐时表现为向岸偏移;在纬向上,底盐增加会驱动重心向高纬度转移,聚集性加强。温度和盐度对沙海蜇的扩散影响分别呈非线性和线性趋势,底温和底盐对沙海蜇铺展面积呈非线性负向影响。沙海蜇地理分布、扩散方向、扩散强度的时空演变格局,可能是黄海冷水团、长江径流和黑潮三种因素共同驱动的结果,其规律仍有待于后续作进一步研究。
【Abstract】 According to the fishery dependent data series about Nemopilemanomurai in the Yellow Sea and East China Sea in the autumn of 2006-2015, a series spatial statistical indices like cluster centre, structuringdirectionsofthegeographicaldistribution,andtheextentofdispersionaroundthecentre were used to characterize the location(centre of gravity, CG), occupation of space(Inertia, isotropy and spreading area) and their relationship with the environment. The results showed that the CG of population shifted off the coast and extend to the south. The dispersion pattern of the Nemopilemanomurai seemingly shifted from preferential single direction to all direction.Spreading area increased with fluctuation over time, the smallest spreading area yielded in 2006, and maximum in 2015.The longitudinal variation of CG was related closely to the bottom temperature, surface salinity and bottom salinity, CG onshore migrated with bottom temperature and surface salinity increased, offshore migrated at middle level and onshore migrated at higher level. Increasing bottom salinity also drove population transfer at higher latitude and reduced the dispersion intensity.The dispersion direction was nonlinearly and linearly corresponding to the temperature and salinity respectively. Bottom temperatureand bottom salinity also had nonlinear negative effects on the spreading area. The evolution of the geographic distribution, dispersion direction and intensitymay be driven bythe combined effect of Yellow Sea cold water mass, the Yangtze River runoff and the Kuroshio,which will further demonstrated in the subsequent analysis.
【Key words】 Nemopilemanomurai; Yellow Sea; East China Sea; spatial-temporal distribution; spatial indices;
- 【会议录名称】 2015年中国水产学会学术年会论文摘要集
- 【会议名称】2015年中国水产学会学术年会
- 【会议时间】2015-11-05
- 【会议地点】中国浙江杭州
- 【分类号】S968.9
- 【主办单位】中国水产学会