中国水产科学Issue(2)：361-368,8.DOI:10.3724/SP.J.1118.2014.00361
赤水河浮游植物群落结构特征及其与水环境因子的关系
Relationship between phytoplankton community structure and aquatic environmental factors in the Chishui River, a protected tribu-tary of the Yangtze River
摘要
Abstract
As the last undammed tributary of the upper Yangtze River, Chishui River is an important protected aquatic habitat. There is a very close relationship between phytoplankton and the aquatic environment. Changes in phytoplank-ton composition and distribution are regularly used as indicators in environmental monitoring. Furthermore, phyto-plankton community structure can be affected by changes in the environment. In this paper, the relationship between the phytoplankton community structure and aquatic environmental factors in the Chishui River was analyzed. Phytoplank-ton data and aquatic environmental factors were obtained from research investigations in the Chishui River National Nature Reserve for Rare and Endemic Fishes in the Upper Reaches of the Yangtze River during 2007 to 2010. The in-vestigations were usually carried out each year in June, September and December. The investigations recorded 517 phytoplankton species belonging to eight phyla. Species of Bacillariophyta were the most prevalent, accounting for 67.97%, Chlorophyta and Cyanophyta species accounted for 17.83%and 10.61%, respectively, while Euglenophyta and Xanthophyta species totaled 1.98% and 1.34%, respectively. Phytoplankton species of Chrysophyta, Pyrrophyta and Cryptophyta accounted for 0.70%, 0.93% and 0.50%, respectively. Regarding phytoplankton density and biomass, average values for phytoplankton density and biomass ranged from 11.95×104 to 28.31×104 cell·L-1 and 0.36 to 0.94 mg·L-1, respectively, at the fish breeding stage. At the fish fattening stage, average value for density and biomass ranged from 10.32×104 to 33.73×104 cell·L-1 and 0.25 to 0.60 mg·L-1, respectively, while at the wintering stage the average values ranged from 11.53×104 to 26.38×104 cell·L-1 and 0.39 to 0.76 mg·L-1, respectively. For phytoplankton commu-nity biodiversity, the average Shannon-Wiener’s diversity index (H'), Margalef’s richness (d) and Pielou’s species evenness (J) were 4.42, 6.93 and 0.84, respectively. The community biodiversity results indicate that most sampling sites in the Chishui River were unpolluted, except for the Tucheng sampling site. The relationship between phytoplank-ton community structure and aquatic environmental factors was analyzed by canonical correlation analysis (CCA). The result of CCA indicated differences in the phytoplankton community structure at the three sampling stages. The aquatic environmental factors, including nitrate-nitrogen ( 3NO--N), nitrite-nitrogen ( 2NO--N) and total nitrogen (TN), had a major influence on the phytoplankton community structure at the fish breeding stage, magnesium ion (Mg2+) was the main influencing factor at the fish fattening stage, while pH, dissolved oxygen (DO), calcium ion (Ca2+) and water temperature (WT) were significant factors at the fish wintering stage.关键词
浮游植物/群落结构/环境因子/赤水河/自然保护区Key words
phytoplankton/community structure/environment factor/the Chishui River/nature protection area分类
资源环境引用本文复制引用
吴湘香,李云峰,沈子伟,张燕,倪朝辉..赤水河浮游植物群落结构特征及其与水环境因子的关系[J].中国水产科学,2014,(2):361-368,8.基金项目
中国长江三峡工程开发总公司资助项目(071105-04) （071105-04）
