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首页 > 过刊浏览>2022年第29卷第1期 >118-129. DOI:10.12264/JFSC2021-0140
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基于生态网络结构的浙江南部近海鱼类群落关键种识别
作者:
作者简介:

王士聪(1998–),男,硕士研究生,研究方向为生物多样性保护.E-mail:wsc_0212@163.com

中图分类号:

S931

基金项目:

国家自然科学基金项目(31902372, 41906074)； 浙江省温台渔业资源专项调查项目(158053)； 上海海洋大学青年教师科研启动基金项目(210021).


Keystone species of fish community in the offshore waters of southern Zhejiang: Insight from ecological network
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    摘要:

    对 2016—2019 年浙江南部近海底拖网采集的主要鱼类进行食性分析, 并结合前期摄食习性资料, 以种间营养关系为基础构建浙江南部近海鱼类群落的食物网拓扑, 以拓扑网络指标结合 KPP 运算确定该海域的鱼类群落关键种。结果表明: (1)对浙江南部近海的 34 种主要鱼类开展胃含物分析, 共形成营养连接数 276 对。(2)拓扑食物网中带鱼(Trichiurus lepturus)的点度(degree, D)、入度(in-degree, Din)、中间中心性(betweenness centrality, BC)、接近中心性(closeness centrality, CC)和信息中心性(information centrality, IC)最大, 表明与其产生摄食联系的物种数目最多, 其信息交换的控制能力最强, 对维持群落结构的稳定性起关键作用; 而七星底灯鱼(Benthosema pterotum)的出度(out-degree, Dout)、拓扑重要性指数(topological importance index, TI)最大, 表明捕食该物种的鱼种类数最多, 揭示其物种信息扩散能力最强。(3)带鱼的关键性指数(keystone indices, K)、下行关键性指数(top-down keystone index, Kt)最高, 表明对群落中的能量流动和信息传递的影响最大, 且下行控制效应最大; 七星底灯鱼的上行关键性指数 (bottom-up keystone index, Kb)和值最大, 表明对群落的上行控制效应最大; (4)通过 KPP 运算验证带鱼对浙江南部近海鱼类群落结构的稳定性和种间信息的传递起决定作用。本研究通过计算 11 种拓扑关键性参数结合 KPP 运算筛选群落结构关键种, 发现带鱼和七星底灯鱼在群落结构的稳定性中起关键作用, 其中带鱼为关键捕食者, 七星底灯鱼为关键被捕食者。

    Abstract:

    In this study, we analyzed the stomach contents of main fishes collected using a bottom trawling net in the offshore waters of southern Zhejiang, China from 2016 to 2019. By combining with the data of early feeding habits, we constructed the food web topology of the fish community based on interspecific trophic relationships. The keystone species of the fish community was determined using the topological network index and KPP calculation. The results showed that there were 276 pairs of trophic links in the food web based on the feeding analysis. Trichiurus lepturus with the highest D, Din, CC, BC, and IC and Benthosema pterotum with the highest Dout, TI1 , and TI9 had the highest rank among the 34 species, indicating that they were closely related to other species in the fish community and could control the stability of community structure and information diffusion. The key index of T. lepturus (K and Kt) and B. pterotum (Kb) had the highest value, indicating that they played a decisive role in the energy flow and information transfer of community structure. It was verified using KPP calculation that T. lepturus played a decisive role in the stability of fish community structure and the transmission of interspecific information in the offshore waters of southern Zhejiang. In this study, the keystone species of the fish community were identified using 11 topological parameters combined with KPP calculation. It was found that T. lepturus (D, Din, CC, BC, IC, K, and Kt) and B. pterotum (Dout, TI1 , TI9 , and Kb) played a key role in the stability of community structure, in which T. lepturus was the keystone predator and B. pterotum was the keystone prey.

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王士聪,杨蕊,高春霞,韩东燕,叶深.基于生态网络结构的浙江南部近海鱼类群落关键种识别[J].中国水产科学,2022,29(1):118-129
WANG Shicong, YANG Rui, GAO Chunxia, HAN Dongyan, YE Shen. Keystone species of fish community in the offshore waters of southern Zhejiang: Insight from ecological network[J]. Journal of Fishery Sciences of China,2022,29(1):118-129

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