南海西部不同粒级浮游动物碳氮稳定同位素研究  

Study on carbon and nitrogen stable isotopes of size fractionated zooplankton in western South China Sea

作　　者：张文博 黄洪辉[2] 巩秀玉[2] 刘华雪[2] ZHANG Wenbo;HUANG Honghui;GONG Xiuyu;LIU Huaxue(Guangdong Province Academy of Environmental Science,Guangzhou 510045,China;South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510300,China)

机构地区：[1]广东省环境科学研究院,广东广州510045 [2]中国水产科学研究院南海水产研究所,广东广州510300

出　　处：《海洋环境科学》2025年第1期89-96,共8页Marine Environmental Science

基　　金：国家自然科学基金项目(41706138);农业农村部财政专项项目(NFZX2021)。

摘　　要：本文根据2018年夏季在南海西部海域采集的不同粒级浮游动物样品(大型:>500μm;中型:380~500μm;小型:180~380μm),对其生物量、δ^(13)C和δ^(15)N进行了分析研究。结果显示,浮游动物生物量变化范围为0.25~8.44 mg/m^(3),δ^(13)C变化范围为-26.73‰~-14.84‰,δ^(15)N变化范围为3.44‰~8.40‰。受沿岸上升流及冷涡影响,研究海域浮游动物生物量、δ^(13)C、δ^(15)N的高值区多分布在中部和西部海域。浮游动物δ^(13)C、δ^(15)N出现显著粒径结构差异,δ^(15)N随浮游动物粒径增大而增加,中型浮游动物的δ^(13)C低于大型、小型浮游动物。各粒级浮游动物的δ^(13)C、δ^(15)N呈现相似的空间分布特征,高值区主要分布在中部和西部海域。相关性分析显示,大型、小型浮游动物的δ^(15)N与生物量呈显著的正相关关系;中型浮游动物的δ^(13)C、δ^(15)N与生物量的相关性不明显。本研究可为南海西部海域食物网结构的研究提供基础材料。Based on size fractionation zooplankton(>500μm,380-500μm and 180-380μm)samples collected in the western South China Sea in 2018 summer,biomass,δ^(13)C andδ^(15)N were studied.The results show that the biomass of zooplankton ranged from 0.25 mg/m^(3)to 8.44 mg/m^(3),theδ^(13)C of zooplankton ranged from−26.73‰to−14.84‰,and theδ^(15)N of zooplankton ranged from 3.44‰to 8.40‰.Due to the influence of coastal upwelling and cyclonic eddy,high values of zooplankton biomass and stable isotope appeared around the central and western in study area.The stable isotopes of carbon and nitrogen of zooplankton showed significant differences in particle size structure.The nitrogen stable isotopes of size-fractioned zooplankton generally increased from small to large size zooplankton,and theδ^(13)C of meso-zooplankton were significantly lower than micro-zooplankton and macro-zooplankton.Theδ^(13)C andδ^(15)N of size-fractioned zooplankton showed similar spatial distribution characteristic.And high values appeared around the central and western of the study area.The correlation analysis shows that stable nitrogen isotope of micro-zooplankton and macro-zooplankton were positively correlated with zooplankton biomass,while the stable carbon and nitrogen isotope of meso-zooplankton were not.This study provides basic materials for the structure of marine food webs in the western South China Sea.

关 键 词：浮游动物 生物量 稳定同位素 南海西部 

分 类 号：Q178.53[生物学—水生生物学]