水生态学杂志2025，Vol.46Issue(5)：37-49,13.DOI:10.15928/j.1674-3075.202505280002
基于多营养级生物完整性指数的北部湾生态健康评估
Ecological Health Assessment of Beibu Gulf Based on the Multi-Trophic Index of Biological Integrity
摘要
Abstract
A scientific assessment of the ecological health of Beibu Gulf will support development of strategies to protect water quality and manage the environment.In this study,we evaluated the ecological health of Beibu Gulf based on a multi-trophic index of biological integrity(M-IBI)developed for this study.In October 2022(wet season)and January 2023(dry season),water samples were collected at 69 sampling stations to monitor multi-trophic aquatic organisms using environmental DNA(eDNA)metabar-coding technology.The aquatic organisms detected included fish,macroinvertebrates,small invertebrates,algae,protists,and prokaryotes.Then,based on taxa richness,dominance abundance,network density,phylogenetic mean pairwise distance,and ecological risk taxa,a multi-trophic index of biological integri-ty(M-IBI)was constructed,with five classifications(excellent,good,fair,bad,very bad)according to the index values.Results show that a total of 214 fish species,163 macroinvertebrate species,32 small inver-tebrate species,188 protist species,422 algal species,and 318 prokaryotic taxa were identified.Dominant groups were Clupeiformes(fish),Arthropoda(macroinvertebrates),Calanoida(small invertebrates),Spiro-trichea(protists),Mamiellophyceae(algae),and Proteobacteria(prokaryotes),and the dominant group structure of different taxa was the same in both wet and dry seasons.Seven invasive fish species,36 harm-ful algal species,and 10 pathogenic functional groups were detected.Macroinvertebrates exhibited the highest network density(0.221),while prokaryotes showed the greatest phylogenetic distance(0.991).The ecological health assessment results show that the M-IBI value during the wet season was in the range of 0.664 to 0.871,with the mean M-IBI value of 0.762±0.049,categorized as good(corresponding threshold:0.724-0.768).The M-IBI value during the dry season was lower,ranging from 0.588 to 0.813,with a mean value of 0.699±0.051,categorized as fair(corresponding threshold:0.679-0.723).In conclu-sion,the combination of eDNA metabarcoding with a multi-trophic index of biological integrity enables effective assessment of marine ecosystem health and offers a scientific basis for ecological protection and early warning of risk in the Beibu Gulf.关键词
多营养级类群/生物完整性/环境DNA/生态健康评价/北部湾Key words
multi-trophic communities/biological integrity/environmental DNA/ecosystem health as-sessment/Beibu Gulf分类
资源环境引用本文复制引用
陈文坚,李育森,彭金霞,韦嫔媛,周磊,王大鹏..基于多营养级生物完整性指数的北部湾生态健康评估[J].水生态学杂志,2025,46(5):37-49,13.基金项目
广西农业科技自筹经费项目(Z202280). （Z202280）
