摘要
为了解生境差异显著的华南典型海湾主要渔业生物的营养结构特征,于2015年丰水期研究了海陵湾和陵水湾主要渔业生物碳、氮稳定同位素比值(δ13C和δ^(15)N),并计算了基于δ13C-δ15N量化的营养结构。结果表明,海陵湾主要渔业生物的δ13C[(-15.36±0.62)‰]和δ15N[(15.53±0.94)‰]均显著高于陵水湾(P<0.01),但δ13C差值(CR)和δ15N差值(NR)低于陵水湾。陵水湾渔业生物NR和总面积(TA)都高于海陵湾,表明陵水湾比海陵湾食物链更长,多样性水平更高。以3.4‰作为一个营养级的氮稳定同位素富集度来计算,陵水湾渔业生物营养级级距仅为1.37,而海陵湾主要渔业生物营养级级距小于1,说明陵水湾和海陵湾均处于高营养级生物较少且食物网受干扰较多的状态。
In order to understand the characteristics of trophic structure of main fishery in typical gulf of southern China with significant habitat difference,we analyzed the ratio of carbon and nitrogen stable isotopes(δ13C andδ15N)of major fishery species collected in Hailing Bay and Lingshui Bay in wet season of 2015,and calculated several quantitative metrics based on theδ13C andδ15N ratios so as to quantitatively characterize the trophic structure in community-wide aspect.The results show that the averageδ13C[?15.36±0.62)‰]andδ15N[(15.53±0.94)‰]values of main fishery species in Hailing Bay were significantly higher than those in Lingshui Bay[(?17.44±1.21)‰and(13.78±1.31)‰,P<0.01].However,the NR and TA values of Hailing Bay were lower than those of Lingshui Bay,showing longer food chain length and higher diversity in Lingshui Bay.Calculated by 3.4‰as a nutrient grade of nitrogen stabilized isotope enrichment,the grade distance of Lingshui Bay fishery was only 1.37,lower than 1 of Hailing Bay,indicating that both Lingshui Bay and Hailing Bay have relatively less high trophic organisms and the food webs are often disturbed.
作者
张文博
黄洪辉
李纯厚
刘永
齐占会
徐姗楠
刘华雪
ZHANG Wenbo;HUANG Honghui;LI Chunhou;LIU Yong;QI Zhanhui;XU Shannan;LIU Huaxue(Guangdong Provincial Academy of Environmental Sciences,Guangzhou 510045,China;South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510300,China;South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510530,China)
出处
《南方水产科学》
CAS
CSCD
北大核心
2019年第5期9-14,共6页
South China Fisheries Science
基金
国家重点研发计划项目(2018YFD0900904)
国家自然科学基金项目(41706138)
广东省渔业生态环境重点实验室开放基金资助项目(FEEL-2017-7)
关键词
稳定同位素
渔业生物
海陵湾
陵水湾
stable isotope
fishery species
Hailing Bay
Lingshui Bay