不同时期北部湾日本带鱼营养生态位差异

doi:10.13287/j.1001-9332.202102.036

应用生态学报 ›› 2021, Vol. 32 ›› Issue (2): 683-690.doi: 10.13287/j.1001-9332.202102.036

不同时期北部湾日本带鱼营养生态位差异

何雄波^1,2,5, 李波², 王锦溪², 易木荣^1,2, 康斌³, 颜云榕^1,2,4,5*

¹南方海洋科学与工程广东省实验室(湛江)南海资源大数据中心, 广东湛江 524013;
²广东海洋大学水产学院, 广东湛江 524088;
³中国海洋大学水产学院, 山东青岛 266100;
⁴广东海洋大学深圳研究院海洋渔业信息化技术中心, 广东深圳 518120;
⁵广东省南海深远海渔业管理与捕捞工程技术研究中心, 广东湛江 524088

收稿日期:2020-06-02 接受日期:2020-11-02 出版日期:2021-02-15 发布日期:2021-08-15
通讯作者: ^*E-mail: yryan_gdou@163.com
作者简介:何雄波, 男, 1989年生, 博士. 主要从事鱼类摄食生态研究. E-mail: xiongbo98@163.com
基金资助:
国家重点研发计划项目(2018YFD0900905)、南方海洋科学与工程广东省实验室(湛江)资助项目(ZJW-2019-08)、广东省基础与应用基础研究基金项目(2019B1515120064)和广东省科技计划项目(2018B030320006)资助

Changes in the trophic niche of Trichiurus japonicus in the Beibu Gulf in different periods.

HE Xiong-bo^1,2,5, LI Bo², WANG Ji-xi², YI Mu-rong^1,2, KANG Bin³, YAN Yun-rong^1,2,4,5*

¹Marine Resources Big Data Center of South China Sea, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524013, Guangdong, China;
²College of Fishe-ries, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China;
³College of Fishery, Ocean University of China, Qingdao 266100, Shandong, China;
⁴Center of Marine Fisheries Information Technology, Shenzhen Institute of Guangdong Ocean University, Shenzhen 518120, Guangdong, China;
⁵Guangdong Provincial Engineering and Technology Research Center of Far Sea Fishe-ries Management and Fishing of South China Sea, Zhanjiang 524088, Guangdong, China

Received:2020-06-02 Accepted:2020-11-02 Online:2021-02-15 Published:2021-08-15
Contact: ^*E-mail: yryan_gdou@163.com
Supported by:
National Key R&D Program of China (2018YFD0900905), the Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) (ZJW-2019-08), the Guangdong Basic and Applied Basic Research Foundation (2019B1515120064), and the Science and Technology Plan Project of Guangdong Province, China (2018B030320006)

摘要/Abstract

摘要： 基于2008—2009年和2018年对北部湾日本带鱼的采样,通过测定碳氮稳定同位素,计算其营养级、营养生态位等指标,对比分析10年前后日本带鱼营养生态位的差异,探究其生态适应能力的变动。结果表明: 2个时期北部湾日本带鱼碳稳定同位素(δ¹³C)值差异明显,2018年δ¹³C值范围变窄,平均值变小,推测日本带鱼食物来源由偏中上层向偏中下层水域转变;氮稳定同位素(δ¹⁵N)值的范围和平均值基本保持不变,营养级范围和平均值(3.38和3.43)变化不明显,说明近10年来北部湾日本带鱼在生态系统中的营养层次比较稳定。日本带鱼δ¹³C值与肛长相关性不显著,δ¹⁵N则为极显著正相关性。在营养生态位方面,2018年的生态位指标均出现不同程度的下降,下降幅度的范围为1.1%~32.1%;生态位总面积和核心生态位面积分别由20.20和4.68缩小至14.20和3.18,说明北部湾日本带鱼的营养生态位发生了显著变化,对资源利用能力和环境适应能力下降。推测,10年来北部湾日本带鱼的营养级变化不明显,但由于食物来源发生变化,营养来源多样性下降,营养生态位变小。

关键词: 北部湾, 日本带鱼, 营养生态位, 营养级, 稳定同位素

Abstract: We measured stable carbon and nitrogen isotopes and calculated trophic level and trophic niche of Trichiurus japonicus, with samples collected from the Beibu Gulf from 2008 to 2009 and 2018. The differences between two periods were compared and analyzed to explore the changes of its ecological adaptation. The results showed that value of δ¹³C varied substantially between the two periods. The narrowed range and the smaller mean value of δ¹³C in 2018 suggested that their food source changed from upper-middle to lower-middle waters. The values of δ¹⁵N were stable, and the range and mean values of trophic level (3.38-3.43) did not change significantly, which indicated a stable trophic level of T. japonicas in the past decade. The correlation between δ¹³C and preanal length was not significant, but a positive correlation between δ¹⁵N and preanal length. In terms of trophic niche, the indicators had decreased in different degrees in 2018 with 1.1%-32.1%. The value of total area and standard ellipse area decreased from 20.20 and 4.68 to 14.20 and 3.18, respectively, indicating that the niches of T. japonicas in the Beibu Gulf had varied obviously and that their ability to use resources and adapt to the environment had declined. It was speculated that in the past decade, the mean trophic level of T. japonicas in the Beibu Gulf had not changed significantly. Due to the change of food sources, however, the diversity of trophic sources had decreased, and the trophic niche had become smaller.

Key words: Beibu Gulf, Trichiurus japonicas, trophic niche, trophic level, stable isotope

何雄波, 李波, 王锦溪, 易木荣, 康斌, 颜云榕. 不同时期北部湾日本带鱼营养生态位差异[J]. 应用生态学报, 2021, 32(2): 683-690.

HE Xiong-bo, LI Bo, WANG Ji-xi, YI Mu-rong, KANG Bin, YAN Yun-rong. Changes in the trophic niche of Trichiurus japonicus in the Beibu Gulf in different periods.[J]. Chinese Journal of Applied Ecology, 2021, 32(2): 683-690.

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不同时期北部湾日本带鱼营养生态位差异

Changes in the trophic niche of Trichiurus japonicus in the Beibu Gulf in different periods.

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