Analysis of phytoplankton interspecific association and its influencing factor in Huaxi River, a tributary of the Three Gorges Reservoir

摘要：
为了解三峡库区浮游植物群落的种间关联性及影响因子,以花溪河为对象,通过χ检验、种间联结系数(C)和Pearson相关分析等指标探究浮游植物群落结构和物种的关系.共鉴定出藻类8门103属380种,四个季节均以绿藻和硅藻为主,裸藻和蓝藻次之.春季、夏季、秋季和冬季物种对联结性检验(χ检验)中不显著相关占比分别为78.4%,83.9%,83.0%和74.0%,表明物种关联弱,独立性较强,群落结构松散.种间关联的影响因子主要是物种均匀度、高锰酸盐指数和叶绿素a.其中,C>0(正联结)主要受物种均匀度影响,C=0主要受叶绿素a影响,表明花溪河浮游植物种间关联受生物因子和非生物因子的综合影响.

In order to understand the interspecific association and influencing factors of phytoplankton communities in the Three Gorges Reservoir,we usedχ~2 test,interspecific association coefficient(C)and Pearson correlation analysis to explore the relationship between phytoplankton community structure and species in Huaxi River.The results showed that 380 species belonging to 103 genera and 8 phyla were identified,furthermore the main dominant species were Chlorophyta and Bacillariophyta followed by Euglenophyta and Cyanophyta during four seasons.In spring,summer,autumn and winter,the proportion of nonsignificant associations(chi-square test)was 78.4%,83.9%,83.0%and 74.0%,respectively.The correlation between species was weak,suggesting that phytoplankton species was highly independent and community structure was loose and unstable.On the whole,phytoplankton evenness,permanganate index and chlorophyll a were the main influencing factors of interspecific association.Among them,C>0(positive association)was mainly affected by species evenness,while C=0(no association)was mainly affected by chlorophyll a.The results showed that the interspecific associations between phytoplankton species in Huaxi River were affected by both biological and abiotic factors.

作者：
施军琼 何书晗 欧阳添 赵璐 纪璐璐 吴忠兴

Shi Junqiong;He Shuhan;Ouyang Tian;Zhao Lu;Ji Lulu;Wu Zhongxing(School of Life Sciences,Southwest University,Chongqing 400715,China)

机构地区：
西南大学生命科学学院

出处：
《betway官方app 学报：自然科学版》 CAS 北大核心 2022年第5期110-116,I0002,共8页

Journal of Henan Normal University(Natural Science Edition)

基金：
国家自然科学基金(41877410) 中央高校基本科研业务费专项(XDJK2019C044).

关键词：
三峡库区 花溪河 浮游植物 种间关联

Three Gorges Reservoir Huaxi River phytoplankton interspecific association

分类号：
Q948 [生物学—植物学]

三峡库区支流花溪河浮游植物种间关联及影响因子分析.pdf