贵州小车河不同水文期浮游植物生态位及种间联结性分析  

Niche and Interspecific Association of Phytoplankton Dominant Species at Different Hydrological Periods in Xiaoche River,Guizhou Province

作　　者：王双艳 肖晶[1,2,3] 陈春春 潘家响 彭淑婵 李秋华 WANG Shuang-yan;XIAO Jing;CHEN Chun-chun;PAN Jia-xiang;PENG Shu-chan;LI Qiu-hua(Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province,Guizhou Normal University,Guiyang 550001,China;Guizhou International Cooperative Research Base-International Joint Research Center for Water Ecology,Guiyang 550001,China;Guizhou Plateau Reservoir Water Environmental Protection and Ecological Restoration Engineering Technology Research Center,Guiyang 550001,China)

机构地区：[1]贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室,贵阳550001 [2]贵州省国际合作研究基地水生态国际联合研究中心,贵阳550001 [3]贵州省高原水库水环境保护与生态修复工程技术研究中心,贵阳550001

出　　处：《环境科学》2025年第2期900-909,共10页Environmental Science

基　　金：贵州省科技厅项目(黔科合平台人才[2020]6009-2号,黔科合支撑[2023]213号,黔科合服企[2023]010号)。

摘　　要：为了解贵州小车河不同水文期浮游植物生态位及种间联结性,于2020~2022年采集了2个不同水文期(枯水期和丰水期)的浮游植物样品.利用生态位宽度(B_(i))、生态位重叠(O_(ik))、方差比率法(VR)、卡方检验(χ^(2))、AC检验和Jaccard指数(JI)分析了浮游植物优势种的生态位和种间联结.结果表明,小车河共鉴定出浮游植物7门50种,其中优势种为4门12种.生态位宽度与FG功能群结合分析表明,小车河水体环境为中富营养状态;优势种可划分为广生态位种、中生态位种和窄生态位种,优势种生态位宽度在1.278~4.849之间变化.生态位重叠值3 a差异不大,O_(ik)>0.6的占比分别为50.00%(2020年)、42.86%(2021年)、53.49%(2022年),表明有接近或超过一般的种对占用环境资源的方式高度相似.优势种间总体呈显著正关联,群落较稳定;卡方检验显示66对优势种对仅有4对有显著联结性,AC检验结果显示有33对有显著联结性,Jaccard指数显示有41对有显著联结性,均为负关联多于正关联,表明小车河浮游植物群落正处于演替初期.To understand the niche and interspecific association of phytoplankton in different hydrological periods of the Xiaoche River in Guizhou Province,phytoplankton samples were collected in two different hydrological periods(dry period and wet period) from 2020 to 2022.The niche width(B_i),niche overlap(O_(ik)),variance ratio method(VR),chisquare test (χ~2),AC test,and Jaccard index(JI) were used to analyze the niche and interspecific association of phytoplankton dominant species.The results showed that a total of 7phyla and 50 species of phytoplankton were identified in the Xiaoche River,with 4 phyla and 12 species being the dominant species.The combination analysis of niche width and FG functional group showed that the water environment of the Xiaoche River in a medium eutrophic state.The dominant species could be divided into broad niche species,medium niche species,and narrow niche species,and the niche width of the dominant species varied between 1.278 and 4.849.No significant difference exists in the three years of niche overlap value,with the proportion of O_(ik)>0.6 being 50.00%(2020),42.86%(2021),and 53.49%(2022),respectively,indicating that there were close to the same or more common species occupying environmental resources in a highly similar way.The dominant species showed a significant positive correlation overall,and the community was relatively stable.The chi-square test showed that only four pairs of 66 dominant species had significant associations;the AC test showed that 33 pairs had significant associations;and the Jaccard index showed that 41 pairs had significant associations,all of which showed more negative than positive associations,indicating that the phytoplankton community in the Xiaoche River was in the early stage of succession.

关 键 词：浮游植物 优势种 生态位 种间联结 小车河 

分 类 号：X171[环境科学与工程—环境科学]