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黑潮营养盐输入对东海陆架浮游生态系统影响的模型研究
王玉衡1,2, 赵亮1, 沈家葳1
1.天津科技大学海洋与环境学院 天津 300457;2.天津市海洋资源与化学重点实验室 天津 300457
摘要:
黑潮是东海陆架主要的外源营养盐来源之一。本文建立了一个物理-生化耦合的三维生态动力学模型,通过敏感性实验分析了黑潮营养盐输入对东海浮游生态系统的影响,分区域、水层和季节对黑潮输入营养盐的贡献进行了统计分析。主要得到如下结论:(1)黑潮对东海陆架营养盐的影响主要集中在整个外陆架和中陆架的中北部,从垂向分布来看,对外陆架影响主要在50m以深的中下层,而对中陆架的影响在次表层(20—50m)和中下层都较为显著,黑潮对东海陆架营养盐输入的总量,冬季略高于夏季。(2)黑潮对东海浮游植物的贡献冬夏两季存在较大差异,冬季叶绿素的增量主要集中在外陆架的中北部和中陆架的中部,分布在表层(0—20m)和次表层;而夏季则主要在外陆架的中部、中陆架的中北部和内陆架的北部,除了内陆架北部以外都以次表层为主。
关键词:  营养盐  浮游植物  生态动力学模型  黑潮  东海
DOI:10.11693/hyhz20170500124
分类号:P731
基金项目:中国科学院战略性先导科技专项(A类),XDA11020305号;国家重点研发计划,2016YFC1401602,2016YFA0601301号;天津市海洋资源与化学重点实验室(天津科技大学)开放基金,201505号。
INFLUENCE OF KORUSHIO NUTRIENTS INPUT TO THE EAST CHINA SEA SHELF ECOSYSTEM—A MODEL STUDY
WANG Yu-Heng1,2, ZHAO Liang1, SHEN Jia-Wei1
1.College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China;2.Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin 300457, China
Abstract:
Kuroshio is an important extrinsic nutrient source of the East China Sea Shelf (ECSS). We employed a three-dimensional coupled biophysical model to study the impact of Kuroshio-sourced nutrients to the ECSS ecosystem, and conducted a sensitivity experiment in which the contributions of nutrients from Kuroshio were studied statistically to different regions, layers, and seasons. The results show that the impact of the Kuroshio on nutrient distribution occurred mainly in the outer and central-to-northern parts of the middle ECSS. In the outer part, most nutrients from the Kuroshio affected deep layers (>50m), while in the middle part, both deep and subsurface layers (20—50m) were affected. The nutrient input from Kuroshio to the ECSS in winter was about 10% greater than that in summer. The influence of Kuroshio on chlorophyll showed an obvious difference in winter and summer. In winter, most chlorophyll increase was observed in the central-to-northern parts of the middle ECSS, and vertically in surface (0—20m) and subsurface layers. In summer, chlorophyll showed an obvious change in different parts of the ECSS. Therefore, in ECSS region, subsurface is the key region under the influence of Kuroshio.
Key words:  nutrient  phytoplankton  biophysical model  Kuroshio  East China Sea
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