首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
帅方敏,李新辉,刘乾甫,李跃飞,杨计平,李捷,陈方灿.珠江水系鱼类群落多样性空间分布格局.生态学报,2017,37(9):3182~3192 本文二维码信息
二维码(扫一下试试看!)
珠江水系鱼类群落多样性空间分布格局
Spatial patterns of fish diversity and distribution in the Pearl River
投稿时间:2016-01-13  最后修改时间:2016-10-17
DOI: 10.5846/stxb201601310222
关键词多样性  空间分布  珠江  NMDS  RDA  环境因子
Key Wordsdiversity  spatial distribution pattern  Pearl River  NMDS  RDA  environmental factors
基金项目国家自然科学基金青年项目(31400354);中国水产科学研究院基本科研业务费项目(2015B01PT01);农业部公益性行业专项(201303048)
作者单位E-mail
帅方敏 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380  
李新辉 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380 lxhui01@aliyun.com 
刘乾甫 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380  
李跃飞 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380  
杨计平 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380  
李捷 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380  
陈方灿 中国水产科学研究院珠江水产研究所, 广州 510380;农业部珠江中下游渔业资源环境重点野外科学观测试验站, 肇庆 526100;中国水产科学研究院珠江流域渔业资源养护与生态修复重点实验室, 广州 510380  
摘要点击次数 129
全文下载次数 17
摘要:
珠江是我国南方第一大河,是我国重要淡水渔业生产基地和水生生物资源基因库。珠江鱼类在维持生物多样性、提供鱼类种质资源方面举足轻重。但是到目前为止,关于其鱼类空间分布格局的研究甚少。特别是近几十年来各种水工建设和过度捕捞使得渔业资源急剧衰退,鱼类空间分布的研究显得尤为重要。2015年对珠江全流域13个站位进行了全面调查,共采集渔获物10119尾,隶属于94种72属17科。鲤科鱼类占显著优势,其次种类较多的依次为鲿科、鳅科。采用非度量多维标度排序(NMDS)方法对鱼类群落空间分布特征进行了分析,结果表明珠江鱼类被划分为3个类群,即以餐、南方拟餐、黄颡鱼等小型鱼类为主的中上游类群、以赤眼鳟、鲮鱼、广东鲂等中型鱼类为主的中下游类群和以罗非鱼为主的重要支流类群。同时发现中下游物种多样性高,上游及河口江段多样性低的格局。采用冗余分析方法(RDA)分析了鱼类多样性与环境因子的关系,发现年均气温、降雨量、年均径流量、河流宽度与透明度是珠江水系河流鱼类群落结构差异的主要影响因子,其中年均气温是影响鱼类群落分布的最关键因子之一。与历史资料对比后发现,珠江鱼类种类明显减少、空间分布也发生了巨大改变。研究是珠江水系野生渔业资源长期调查的一部分,研究结果将对渔业资源的多样性保护和可持续利用具有指导意义。
Abstract:
The Pearl River, which is 2400 km long and flows into the South China Sea, is the longest river in subtropical southern China. The warm humid climate of the region, which promotes high species diversity, has resulted in significant aquatic biodiversity and the development of lucrative commercial fisheries. Nevertheless, studies on the spatial distribution of fish communities in the Pearl River system are limited, especially, considering the decline in global fishery resources due to numerous anthropogenic stressors, such as overfishing, dam construction, introduction of invasive species, and climate change. Thus, studies on the spatial distribution of fish species in the Pearl River are urgently needed. This study investigated the spatial patterns of fish diversity and distribution in the Pearl River Basin based on an investigation of 13 sample sites. A total of 10,119 individual fishes were collected during the study period, comprising 94 taxa representing 17 families and 72 genera. The Cyprinidae family, representing 49 taxa, accounted for 52% of the total number of fish species collected. Cyprinidae were the dominant family in the Pearl River, followed by Bagridae (7%; seven species) and Cobitidae (4%; four species). Non-metric multidimensional scaling (NMDS) was applied to the collected data and three separate groups were identified. The spatial variation in upstream fish assemblages differed significantly from that in downstream assemblages (P < 0.05), although clustering and diversity showed a significant spatial autocorrelation. A significantly high species diversity was recorded in the Pearl River, but low species diversity existed in the up and downstream reaches. Redundancy analysis was used to describe the relationship between the diversity patterns of fish species and associated environmental factors. Temperature, precipitation, water discharge, river width, and water chemistry play important roles in species diversity, with the average annual temperature accounting for the largest proportion of variance. A comparison with historical data for the Pearl River revealed a dramatic decline in fish species and a significant change in the spatial distribution of fish communities. Currently, the most serious threat to the ecology of the Pearl River network is the invasion of alien species. For example, non-native tilapia are now widely distributed in most of the Pearl River system, even surviving in the cooler, upper reaches of the Nanpanjiang River. In the Hongshuihe, Beijiang, and Dongjiang Rivers, tilapia is the dominant species recorded and has frequently been collected in the middle and lower reaches of the Pearl River. The present study is part of a long-term investigation into the wild fishery resources of the Pearl River. Therefore, understanding the processes outlined in this study will assist in the conservation of fish community diversity, which is critical to the success and sustainability of commercial fisheries in the Pearl River. Regularized discriminant analysis (RDA) is used by ecologists to relate a dataset (Y) of response variables (such as species abundance) to a second dataset (X) of explanatory variables (often environmental factors) and consistently outperformed other statistical tests using all the data in this study.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 56253850 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持