生态科学2025，Vol.44Issue(5)：241-251,11.DOI:10.14108/j.cnki.1008-8873.2025.05.023
白龙江迭部—武都段浮游硅藻群落结构及分类多样性研究
Study on community structure and taxonomic diversity of planktic diatom in Diebu-Wudu section of Pai-lung River
摘要
Abstract
The study focused on the section of the Pai-lung River from Diebu to Wudu.During the summer of 2021,phytoplankton diatom samples were collected from eight sampling sites to explore their community structure and characteristics,perform diversity analysis,and integrate taxonomic diversity indices into diatom research.This approach was compared with historical data from the area to evaluate the correlation and advantages of these indices over traditional diversity indices.The findings were as follows.A total of 78 diatom species and 5 deformed diatoms were identified in the study area,classified under 2 phyla,6 orders,9 families,and 32 genera.These were further categorized into 5 distinct functional groups,namely A,D,N,MP,and P.The results from Permutational Multivariate Analysis of Variance(PERMANOVA)indicated significant spatial heterogeneity among the diatom communities(R2=0.459,P=0.015).Analyses using BIOENV and db RDA demonstrated a close relationship between the diatom communities and various water environmental factors.Notably,pH was identified as the most influential environmental parameter affecting the structure and characteristics of the diatom communities.The diversity analysis suggested that the overall ecological status of the water body in the study area was favorable,and the phylogenetic relationships among species became more stable when compared to historical data.The taxonomic diversity index(Δ)and the taxonomic distinctness index(Δ*),which built upon traditional diversity indices,incorporated information on taxonomic differences among species.These indices showed a significant correlation with traditional diversity indices.In contrast,the average taxonomic distinctness index(Δ+)and the taxonomic distinctness variance index(Λ+)exhibited weaker correlations with traditional diversity indices.The study's outcomes have enriched the foundational information on phytoplankton diatoms within the Pai-lung River basin and broadened the application of taxonomic diversity indices in diatom research.This work aims to provide a more comprehensive foundation for diatom diversity studies and river water quality assessments.关键词
白龙江/浮游硅藻/群落结构/分类多样性指数Key words
Pai-lung River/plankton diatom/community structure/taxonomic diversity indices分类
生物学引用本文复制引用
陈凌云,徐笑,刘乐,申啸天,金丽琼,陈锷,杜海峰..白龙江迭部—武都段浮游硅藻群落结构及分类多样性研究[J].生态科学,2025,44(5):241-251,11.基金项目
国家自然科学基金项目(42267044) （42267044）
甘肃省自然科学基金项目(23JRRA688,25JRRK001) （23JRRA688,25JRRK001）
甘肃省科技创新人才计划——西部之光"西部青年学者"项目(25JR6KA002) （25JR6KA002）
陇南市科技计划项目(2025JY10)资助 （2025JY10）
