摘要
为了解舟山海域浮游动物种间关系及环境因子变化对优势种生态位分化的影响,根据2019年夏季和2020年夏季舟山海域浮游动物调查资料,利用优势度指数判断该海域浮游动物优势种,运用Shannon公式和Pianka公式分析浮游动物优势种生态位宽度和生态位重叠指数,采用冗余分析方法探究影响舟山海域浮游动物优势种生态位分化的主要环境因子。结果表明,舟山海域2019年、2020年浮游动物优势种更替率为66.67%。根据舟山海域浮游动物优势种生态位宽度值,可将其分为广生态位种、中生态位种、窄生态位种,2019年广生态位种有4种,2020年有6种,分别占浮游动物优势种的66.67%和60.00%,表明广生态位种是舟山海域浮游动物优势种的主要组成成分。2019年浮游动物优势种生态位重叠指数范围为0.11~0.79,2020年生态位重叠指数范围为0~0.98。冗余分析表明,2019年浮游动物优势种生态位分化主要受硅酸盐浓度、化学需氧量、温度和叶绿素a浓度的影响,2020年浮游动物优势种生态位分化主要受硅酸盐和溶解氧浓度的影响。该研究有望进一步了解舟山海域浮游动物群落的种间关系,为阐述浮游动物对环境变化的适应机制等研究提供数据基础和科学依据。
In order to understand the relationship between zooplankton species in the Zhoushan waters and the impact of environmental factor changes on the niche differentiation of dominant species,according to the survey data of zooplankton in the Zhoushan waters in the summer of 2019 and 2020,the dominance index was used to judge the dominant species of zooplankton in this sea area.The Shannon formula and the Pianka formula were used to analyze the niche breadth and niche overlap index of the dominant zooplankton species,and the redundancy analysis(RDA)method was used to explore the main environmental factors affecting the niche differentiation of the dominant zooplankton species in the Zhoushan waters for two years.The results showed that the replacement rate of dominant zooplankton species in the Zhoushan waters was 66.67%in 2019 and 2020.According to the niche width value of the dominant species of zooplankton in the offshore Zhoushan waters,they could be divided into broad niche species,medium niche species,and narrow niche species.They accounted for 66.67%and 60.00%of the dominant species of zooplankton in 2019 and 2020,indicating that the broad niche species were the main components of the dominant species of zooplankton in the coastal waters of Zhoushan.The niche overlap index of the dominant zo-oplankton species ranged from 0.11 to 0.79 in 2019,and the range of the niche overlap index in 2020 was from 0 to 0.98.RDA analysis showed that the niche differentiation of zooplankton dominant species in 2019 was mainly af-fected by SiO3-Si concentration,COD,temperature and Chl a concentration,and the niche differentiation of zo-oplankton dominant species in 2020 was mainly affected by SiO3-Si concentration and DO concentration.This study is expected to further understand the interspecific relationships of zooplankton communities in the Zhoushan waters,and provide a data basis and scientific basis for studies such as elaborating the adaptation mechanism of zo-oplankton to environmental changes.
作者
宋晨
孟周
王晓波
韩庆喜
Song Chen;Meng Zhou;Wang Xiaobo;Han Qingxi(School of Marine Sciences,Ningbo University,Ningbo 315832,China;Marine Environmental Monitoring Centre of Ningbo,State Oceanic Administration,Ningbo 315012,China;Yuzhi Environmental Technology(Zhejiang)Co.,Ltd.,Ningbo 315199,China)
出处
《海洋学报》
CAS
CSCD
北大核心
2022年第10期127-139,共13页
基金
国家自然科学基金(42076156,41676139)。
关键词
舟山海域
浮游动物
优势种
生态位
冗余分析
Zhoushan waters
zooplankton
dominant species
ecological niche
redundancy analysis
