广西科学院学报2026，Vol.42Issue(1)：36-45,10.DOI:10.13657/j.cnki.gxkxyxb.20260424.004
海南大洲岛海草资源分布现状及保护建议
Distribution Status and Conservation Suggestion of Seagrass Re-sources in Dazhou Island,Hainan
摘要
Abstract
In order to scientifically assess the status of seagrass resources in Dazhou Island of Hainan and iden-tify the needs of conservation and restoration,this study was based on a shipborne survey,field investigation and quadrat transect survey conducted in the sea area around Dazhou Island in August 2020(wet season).Combined with fixed-point monitoring data from 2016 to 2019,the interannual variations in seagrass species composition,distribution area,coverage,erect stem density and biomass were analyzed.Water quality envi-ronmental factors and heavy metal indicators were monitored simultaneously.Pearson correlation analysis and Mantel test were used to evaluate the driving effects of water quality environmental factors on seagrass growth.The results showed that there were 2 families,4 genera and 4 species of seagrass in Dazhou Island,in-cluding Cymodocea rotundata,Halodule uninervis,Thalassia hemprichii and Halophila ovalis.The domi-nant species were T.hemprichii and Halophila ovalis.The total area of seagrass was 2.36 hm2,mainly dis-tributed in Qiangang and Hougang.The coverage,erect stem density and biomass of seagrass showed obvious spatial heterogeneity,and the high value areas were mainly concentrated in Hougang.The results of the sur-vey from 2016 to 2020 showed that the interannual fluctuation in community structure of seagrass beds was significant,and seagrasses were not recorded in 2016 and 2018.On the interannual scale,only the correlation between biomass and Dissolved Oxygen(DO)reached a very significant level.The results of a single survey in 2020 showed that Dissolved Inorganic Nitrogen(DIN)and Copper(Cu)were positively correlated with seagrass coverage,erect stem density,biomass and plant height.While salinity(SAL),pH value,Dissolved Oxygen(DO),Chemical Oxygen Demand(COD),Suspended Solids(SS)and Arsenic(As)were negatively correlated with the above seagrass growth indicators.It is suggested to strengthen the standardized manage-ment of protected areas,establish an in-situ monitoring system and carry out ecological restoration to ensure the sustainable and healthy development of seagrass ecosystems in Dazhou Island.关键词
大洲岛/分布现状/海草/变化趋势Key words
Dazhou Island/distribution status/seagrass/variation trend分类
农业科技引用本文复制引用
姚海君,耿晓晓,冯子乔,林概,黄雪莲,翁文明..海南大洲岛海草资源分布现状及保护建议[J].广西科学院学报,2026,42(1):36-45,10.基金项目
海南省重点研发项目(ZDYF2024SHFZ146,ZDYF2025SHFZ037)和海南省高层次人才项目(421RC662)资助. （ZDYF2024SHFZ146,ZDYF2025SHFZ037）
