摘要
为了解中街山列岛的食物网结构特征,本研究于2020年7月在中街山列岛海域采集鱼类、虾蟹类、头足类、贝螺类和浮游动物等消费者样本,利用碳、氮稳定同位素技术,分析大型海藻、浮游植物、悬浮颗粒有机物(POM)和沉积物有机物(SOM)4种潜在碳源对消费者的贡献率以及中街山列岛海域的食物网结构和营养关系。结果表明:(1)碳源的δ13C值范围在−22.93‰~−9.73‰之间,δ15N值范围在1.72‰~7.68‰之间,消费者的δ13C值范围在−21.95‰~−12.55‰之间,δ15N值范围在4.13‰~12.92‰之间,不同碳源及不同消费者类群之间的碳、氮稳定同位素均有显著性差异(p<0.01);(2)应用SIBER模型计算中街山列岛海域的营养结构指标,与其他海域的研究结果对比发现,该海域生态系统的食源多样性更加丰富,营养级长度和生态位总空间较高;(3)应用SIAR模型计算碳源贡献率,结果表明浮游植物和POM是该海域的重要碳源,平均贡献率为29.63%和28.72%;浮游植物对浮游动物的贡献率最大为80.58%,POM对鱼类的贡献率最大为79.74%;SOM对虾蟹类的贡献率最大为49.94%;大型海藻对消费者的碳源贡献率最低,平均为18.37%;(4)以浮游动物为基线生物计算得知主要消费者的平均营养级在1.58~3.63之间,营养层次为3级,各种类平均营养级由大到小依次为头足类(3.09)、鱼类(3.00)、虾蟹类(2.70)、贝螺类(1.82),中街山列岛海域消费者以低、中级肉食性动物为主,杂食性和高级肉食性动物较少。本研究初步探明了中街山列岛生态系统食物网,为了解该生态系统营养结构奠定了基础,也为今后进一步研究该海域的生态营养动力学提供理论参考。
In order to understand the characteristics of food web structure in Zhongjieshan Islands,consumer samples of fish,shrimp and crabs,cephalopods,shellfish and zooplankton were collected from Zhongjieshan Islands in July 2020.Based on the carbon and nitrogen stable isotope techniques,the contributions of the four potential carbon sources(macroalgae,phytoplankton,suspended particulate organic matter(POM)and substrate organic matter(SOM))to consumers,as well as the food web structure and nutritional relationship of the Zhongjieshan Islands were analyzed.The results revealed that theδ^(13)C values of carbon sources ranged from−22.93‰to−9.73‰,and theδ15N values ranged from 1.72‰to 7.68‰.Theδ13C values of consumers ranged from−21.95‰to−12.55‰,and theδ15N values of consumers ranged from 4.13‰to 12.92‰.One-way analysis of variance showed that there were significant differences in carbon and nitrogen stable isotopes among different carbon sources and different groups of consumers(p<0.01).SIBER model was used to analyze the trophic structure indexes of the regional ecosystem of Zhongjieshan Islands.Compared with the research results of other sea areas,it was found that the level of food source diversity(CR),trophic level length(NR)and total niche area(TA)were relatively high.SIAR model was used to calculate the carbon source contribution rate.The results showed that phytoplankton and POM were important carbon sources,with an average contribution rate of 29.63%and 28.72%.The maximum contribution rate of phytoplankton to zooplankton was 80.58%,and the maximum contribution rate of POM to fish was 79.74%;the maximum contribution rate of SOM to shrimp and crab was 49.94%;the carbon source contribution of macroalgae to consumers was the lowest,with an average of 18.37%.The mean trophic level range of the main consumers in Zhongjieshan Islands was 1.58 to 3.63,and the trophic level was 3.The average trophic level from big to small was as follows of cephalopods(3.09),fish(3.00),shrimps and crabs(2.70),she
作者
杨凡
印瑞
范江涛
蒋日进
肖祎
王静
徐汉祥
刘明智
Yang Fan;Yin Rui;Fan Jiangtao;Jiang Rijin;Xiao Yi;Wang Jing;Xu Hanxiang;Liu Mingzhi(Marine and Fishery Institute,Zhejiang Ocean University,Zhoushan 316021,China;Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province,Scientific Observation and Experimental Station of Fishery Resources of Key Fishing Grounds,Ministry of Agriculture and Rural Affairs,Zhejiang Marine Fisheries Research Institute,Zhoushan 316021,China;South China Sea Fisheries Institute,Chinese Academy of Fishery Sciences,Guangzhou 510300,China)
出处
《海洋学报》
CAS
CSCD
北大核心
2023年第1期25-37,共13页
基金
国家重点研发计划(2018YFD0900904,2019YFD0901204)
中国水产科学研究院南海水产研究所自选课题(2021HZ064)。
关键词
中街山列岛
食物网
潜在碳源
营养级
Zhongjieshan Islands
food web
potential carbon sources
trophic level
