南海南部浮游动物稳定同位素研究--氮稳定同位素.pdf

热带海洋学报 JOURNAL OF TROPICAL OCEANOGRAPHY
2015年第34卷第2期:32-38
海洋生物学(doi:10.39691is100-5470.2015,02005
http://www.ito.ac.cn
南海南部浮游动物稳定同位素研究一一氮稳定同位素”
刘华雪,徐军2,李纯厚,陈作志,黄洪辉
中国水产科学研究院南海水产研究所,广东省渔业生态环境实验室,农业部南海渔业资源开发利用重点实验室,广东广
州510300
2.中国科学院水生生物研究所,湖北武汉430072
摘要:研究分析了南海南部海域不同粒径浮游动物春季和夏季的生物量和氮稳定同位素特征。结果表明,海域大部分站
位春季浮游动物生物量高于夏季(p<0.05),而夏季在西南陆架区生物量出现极高值(受西南陆架上升流影响),拉高了夏
季的均值。根据粒径将浮游动物分成3组,分别是大于500um组(大型)、380~500um组(中型)和180~380um组(小型)。
大型浮游动物生物量在夏季的比例更高,而中型和小型浮游动物在春季的比例更高。春季浮游动物氮稳定同位素83N
值高于夏季,大部分站位大型浮游动物的N值高于中型,而小型浮游动物的。N值最低。广义加性模型(GAM)分析
显示,小型浮游动物δ5N值受环境和生物因子的共同影响非常明显。
关键词:南海;浮游动物;稳定同位素;广义加性模型
中图分类号:P735;S963.21+4
文献标识码:A文章编号:1009-5470(2015)02-0032-07
Stable nitrogen isotope of zooplankton in the southern South China Sea
LTU Hua-xue"XU Jun LT Chun-hou CHEN Zuo-zhi HUANG Hong-hui
1. Key Laboratory of Fishery Ecology and Environment, Guangdong Province; Key Laboratory of South China Sea Fishery Resource
Exploitation Utili/alion, Ministry of Agriculturc; South China Sca Fishcrics Rcscarch Institulc, Chincsc Acadcmy of Fishcry
Scicnccs, Guang/hou 510300, China
2. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Abstract: Stable isotope analysis has emerged as one of the primary means to analyze the structure of food webs. Size
fractionated zooplankton biomass and stable isotopes in the southern South China Sea during spring and summer 20 13 were
invcstigatcd. The results showed that zooplankton biomass in spring was higher than thosc in summer al most sitcs (p<0.05)
whilc the maximal valuc was found in the southwestern continental shel!(inllucnccd by coastal upwelling)with incrcascd
mean value of zooplankton biomass during summer. Zooplankton was divided into three groups according to size. Macro-
zooplankton contributcd morc to thc Lotal ooplankton biomass during summer, whilc mcso-and micro-ooplankton
contributed more during spring. Mean 6,N value in spring was higher than that in summer, and the G'N value of
macro-zooplankton was higher than thosc of meso-and micro-zooplankton al most sitcs Zooplankton biomass was negatively
related to mixed layer depth and seawater temperature at 75-m depth, and positively related to salinity at 75 m, indicating that
zooplankton biomass was influenced by vertical mixing. The result of GAM(generalized additive model) indicated that the
o"N valuc o! micro-zooplankton was allcctcd by combincd impacts by cnvironmcntal and biological factors
Key words: South China Sca, zooplankton stable isotopc, gcncralizcd additive modcl
近年来,稳定同位素技术已经成为研究生态系网底层不同营养物质来源的稳定同位素特征(包括
统特征与过程、探讨物质和能量在生物圈的流动和内源与外源、自然与人为等不同来源)都会影响食物
循环的重要手段之ー,被广泛应用于湖泊、森林、网不同营养级生物的稳定同位素组成:同时,随着
草原等生态系统( Fanelli et al,201)。生态系统食物物质在生态系统不同生物组分间的循环,同位素组
收稿日期:2014-06-08:修订日期:2014-09-01。孙淑杰编辑
基金项目:公益性行业(农业)科研专项(201403008):农业部财政重大专项(NF/X2013);广东省自然科学基金项目(S2013040016424)
中央级公益性科研院所基本业务费(2013TS97)
作者简介:刘华雪(1984~),男,山东省济宁市人,博士,从事海洋生态学研究。H-mai: liuhuaxue(Cscsfriac cn
通信作者:黄洪辉。L-mail:huanghe(@scsfri.ac.cn
*调查取样过程中得到了“南锋”号科学考察船工作人员的协助,数据分析得到了陈绵润博士的帮助,谨致谢忱。