应用生态学报2018，Vol.29Issue(2)：397-402,6.DOI:10.13287/j.1001-9332.201802.039
海南岛海菖蒲种群克隆多样性和遗传结构
Clonal diversity and genetic structure of Enhalus acoroides populations along Hainan Island,China
摘要
Abstract
Seagrasses are monocotyledons that grow in intertidal and subtidal zones.Seagrass beds are among ecosystems with the highest ecosystem service value.However,seagrass beds are rapidly decline due to anthropogenic disturbances and global climate change.Enhalus acoroides,a monoecious perennial species,is the largest seagrass in stature.It distributes in tropical regions,with Hainan Island as its northern limits.Clonal diversity and genetic structure of E.acoroides populations in Hainan Island were studied to facilitate its conservation and restoration.We used four polymorphic microsatellites to genotype samples collected from four extant populations.We found low clonal and genetic diversities within populations,consistent with the expectations of genetic structure in edge populations.A large range of genetic differentiation was found between these four populations,probably due to the large range of geographic distances between them and genetic drift by local extinction and recolonization.We found no sign of recent bottlenecks in all the populations,probably due to the within-population genetic diversity being too low to show obvious reduction even after bottlenecks.We proposed suggestions on population conservation for those with high priority.Given that seagrass bed had experienced rapid decline in recent years,strengthened conservation and ecological restoration are urgently needed.关键词
海菖蒲/微卫星/克隆多样性/遗传多样性/遗传分化Key words
Enhalus acoroide/microsatellite/clonal diversity/genetic diversity/genetic differentiation引用本文复制引用
蒋凯,高辉,陈小勇..海南岛海菖蒲种群克隆多样性和遗传结构[J].应用生态学报,2018,29(2):397-402,6.基金项目
本文由科技部科技基础性工作专项(2014FY130300)资助 This work was supported by the National Key Basic Research Special Foundation of China(2014FY130300). （2014FY130300）
