基于碳氮稳定同位素的南海中西部海域春季中上层渔业生物群落营养结构

doi:10.13287/j.1001-9332.202010.038

应用生态学报 ›› 2020, Vol. 31 ›› Issue (10): 3559-3567.doi: 10.13287/j.1001-9332.202010.038

基于碳氮稳定同位素的南海中西部海域春季中上层渔业生物群落营养结构

孔业富¹, 吴忠鑫^1,2,3*, 颜云榕³, 田涛^1,2, 高东奎^1,2, 杨军¹, 吴英超⁴

¹大连海洋大学水产与生命学院, 辽宁大连 116023;
²设施渔业教育部重点实验室, 辽宁大连 116023;
³广东海洋大学水产学院, 广东湛江 524088;
⁴辽宁省海洋水产科学研究院, 辽宁大连 116023

收稿日期:2020-03-15 接受日期:2020-07-21 出版日期:2020-10-15 发布日期:2021-04-15
通讯作者: * E-mail: wuzhongxin@dlou.edu.cn
作者简介:孔业富, 男, 1996年生, 硕士研究生. 主要从事渔业资源生态学研究. E-mail: kyf1518140222@163.com
基金资助:
广东省自然科学基金——博士启动项目(2017A030310631)资助

Trophic structure of pelagic fishery organism assemblage in the central and western South China Sea in spring revealed by carbon and nitrogen stable isotope analysis

KONG Ye-fu¹, WU Zhong-xin^1,2,3*, YAN Yun-rong³, TIAN Tao^1,2, GAO Dong-kui^1,2, YANG Jun¹, WU Ying-chao⁴

¹School of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, Liaoning, China;
²Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, Liaoning, China;
³College of Fisheries, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China;
⁴Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, Liaoning, China

Received:2020-03-15 Accepted:2020-07-21 Online:2020-10-15 Published:2021-04-15
Contact: * E-mail: wuzhongxin@dlou.edu.cn
Supported by:
PhD Start-up Fund of Natural Science Foundation of Guangdong Province, China (2017A030310631).

摘要/Abstract

摘要： 根据2018年春季于南海中西部海域进行的灯光罩网渔业生物调查,本研究采用碳氮稳定同位素技术,分析了南海中西部海域中上层渔业生物的碳氮稳定同位素基本特征,构建了连续营养谱,划分了营养功能群,并比较了不同营养功能群间的营养结构特征。结果表明: 采集的23种渔业生物δ¹³C均值最大为鲯鳅,(-17.58±0.21)‰,最小为六带线纹鱼,(-19.86±0.33)‰;δ¹⁵N均值的变化范围为8.31‰(琉璃玉鲳)～(12.46±0.74)‰(宝刀鱼)。连续营养谱分析表明,采集的中上层渔业生物营养级介于3.01～4.23,其中19种渔业生物(占总渔获种类的83%)的营养级位于3.0～4.0。23种渔业生物可划分成浮游生物食性、游泳生物食性和混合生物食性3个营养功能群。稳定同位素标准椭圆面积(SEA)分析显示,浮游生物食性功能群占据的营养生态位宽幅最大(SEA=1.56‰²),其次为混合生物食性功能群(SEA=0.99‰²)和游泳生物食性功能群(SEA=0.31‰²)。混合生物食性功能群分别与游泳生物食性功能群和浮游生物食性功能群存在17%和26%的营养生态位重叠度,而游泳生物食性功能群与浮游生物食性功能群不存在生态位重叠。

关键词: 功能群, 营养级, 灯光罩网, 营养生态位

Abstract: Carbon and nitrogen stable isotope analysis was carried out on pelagic fishery organisms caught in light traps and falling nets in the central and western South China Sea in the spring of 2018. The stable isotope values of the sampled individuals were used to elucidate the isotopic variations for the pelagic fishery organisms, to classify species into trophic functional groups, and to compare the differences of trophic structure among the classified trophic functional groups. The results showed that among 23 fishery species the mean δ¹³C value of Coryphaena hippurus was the lowest (-17.58‰±0.21‰), and that of Grammistes sexlineatus was the highest (-19.86‰±0.33‰). The mean δ¹⁵N values ranged from 8.31‰ in Psenes cyanophrys to (12.46±0.74)‰ in Chirocentrus dorab. The continuous trophic spectrum indicated that the trophic level (TL) for the sampled pela-gic fishery organisms ranged from 3.01 to 4.23, of which 19 species (83% of the total) fell between TL 3.0 and 4.0. The 23 species of fishery organisms were classified into three trophic functional groups, i.e., plankton feeding functional group (PFFG), nekton feeding functional group (NFFG), and mixed feeding functional group (MFFG). The analysis of standard ellipse area (SEA) showed that the PFFG occupied the largest trophic niche width (SEA=1.56‰²), followed by the MFFG (SEA=0.99‰²) and NFFG (SEA=0.31‰²). The MFFG overlapped with PFFG and NFFG in the trophic niche, with a relative percentage of 17% and 26%, respectively. There was no overlap between PFFG and NFFG.

Key words: functional group, trophic level, light trap and falling net, trophic niche

孔业富, 吴忠鑫, 颜云榕, 田涛, 高东奎, 杨军, 吴英超. 基于碳氮稳定同位素的南海中西部海域春季中上层渔业生物群落营养结构[J]. 应用生态学报, 2020, 31(10): 3559-3567.

KONG Ye-fu, WU Zhong-xin, YAN Yun-rong, TIAN Tao, GAO Dong-kui, YANG Jun, WU Ying-chao. Trophic structure of pelagic fishery organism assemblage in the central and western South China Sea in spring revealed by carbon and nitrogen stable isotope analysis[J]. Chinese Journal of Applied Ecology, 2020, 31(10): 3559-3567.

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基于碳氮稳定同位素的南海中西部海域春季中上层渔业生物群落营养结构

Trophic structure of pelagic fishery organism assemblage in the central and western South China Sea in spring revealed by carbon and nitrogen stable isotope analysis

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