Phytoplankton Structure and Ecological Niche Differentiation of Dominant Species in Tahe Bay, China.

IF 3.6 3区 生物学 Q1 BIOLOGY
Yanrong Zhang, Zengqiang Yin, Yinghai Du, Xiangxu Wei, Yikai Lan, Quan Yu, Yan Wang, Tao Tian, Lei Chen, Jun Yang
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Abstract

Phytoplankton serve as crucial producers in marine ecosystems, and their community composition and populations' dispersion directly or indirectly influence the productivity of marine waters via the trophic cascade effect within the food chain. A survey was undertaken in September 2021 and March, April, and November 2022 to examine the phytoplankton structure and the environmental variables influencing ecological niche differentiation in the waters of Tahe Bay in Lushun, Dalian city, China. The findings indicated that there are 83 species representing forty-one genera and six phyla, with an annual mean abundance of 22.13 × 104 ind·m-3, predominantly represented by Bacillariophyta (65 species, constituting 78.31% of the total species). The phytoplankton richness indices varied from 0.83 to 4.99, diversity indices ranged from 2.03 to 2.80, and evenness indices spanned from 0.28 to 0.84. Pearson's correlation between phytoplankton abundance and community diversity with environmental parameters, including water temperature, salinity, pH, DO, NH3-N, and NO3-N, was substantial in Tahe Bay's waters. The dominant species, comprising 20 species across three phyla, primarily include broad-niche species, with Paralia sulcata being the most prevalent species, except during summer. The extent of ecological niche overlap among the dominant species varied by season, exhibiting 40.0% severe overlap in September 2021, 100.0% severe overlap in March 2022, 93.0% severe overlap in April 2022, and 58.0% severe overlap in November 2022. The findings of redundancy analysis (RDA) and canonical correspondence analysis (CCA) revealed that COD, water temperature, NO3-N, DIP, NO2-N, and NH3-N are the primary environmental variables influencing the ecological niche differentiation of dominant species of phytoplankton. The results of the study elucidate the alteration rules of dominant species and the stability of the community structure of the phytoplankton community in this sea area, thereby offering a theoretical foundation for the scientific assessment of the ecological health of the area and the sustainable utilization of marine biological resources.

塔河湾浮游植物结构与优势种生态位分化
浮游植物是海洋生态系统的重要生产者,其群落组成和种群分布通过食物链内的营养级联效应直接或间接地影响海水的生产力。于2021年9月和2022年3、4、11月对大连市旅顺塔河湾海域浮游植物结构及影响生态位分化的环境变量进行了调查。结果表明:该海域共有6门41属83种,年平均丰度为22.13 × 104 ind·m-3,以硅藻门为代表,有65种,占总种数的78.31%;浮游植物丰富度指数为0.83 ~ 4.99,多样性指数为2.03 ~ 2.80,均匀度指数为0.28 ~ 0.84。塔河湾水域浮游植物丰度和群落多样性与水温、盐度、pH、DO、NH3-N和NO3-N等环境参数之间存在显著的Pearson相关关系。优势种包括3门20种,主要以宽生态位种为主,除夏季外最常见的种为短尾草。优势种生态位重叠程度随季节而变化,2021年9月为40.0%,2022年3月为100.0%,2022年4月为93.0%,2022年11月为58.0%。冗余分析(RDA)和典型对应分析(CCA)结果表明,COD、水温、NO3-N、DIP、NO2-N和NH3-N是影响优势种浮游植物生态位分化的主要环境变量。研究结果阐明了该海域优势种的变化规律和浮游植物群落结构的稳定性,为科学评价该海域的生态健康状况和海洋生物资源的可持续利用提供了理论依据。
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来源期刊
Biology-Basel
Biology-Basel Biological Science-Biological Science
CiteScore
5.70
自引率
4.80%
发文量
1618
审稿时长
11 weeks
期刊介绍: Biology (ISSN 2079-7737) is an international, peer-reviewed, quick-refereeing open access journal of Biological Science published by MDPI online. It publishes reviews, research papers and communications in all areas of biology and at the interface of related disciplines. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.
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