摘要
卵叶喜盐草(Halophila ovalis)为雌雄异株海草物种,兼具有性繁殖和克隆繁殖。文章以广西竹林海域的卵叶喜盐草种群作为研究对象,对海草生长繁殖进行4个季节的监测,并分析卵叶喜盐草雌株和雄株在海草斑块中心和边缘的繁殖差异。结果表明,卵叶喜盐草的密度为(2967.36±661.96)ind·m^(-2)、盖度为(47±9)%和干重生物量为(37.68±8.85)g·m^(-2),均在春季达到最高。该海域卵叶喜盐草的年平均盖度为(38±14)%,年平均茎枝密度为(1851.02±1036.81)ind·m^(-2),年平均干重生物量为(27.60±13.97)g·m^(-2),斑块中心海草密度和生物量均显著高于斑块边缘,大型底栖生物的生物量也表现为相同趋势。卵叶喜盐草在春季出现雌、雄花。雄株的节间长显著低于雌株的节间长,但雌株和雄株斑块中心和边缘的节间长没有显著差异。
Halophila ovalis is a dioecious seagrass species capable of both sexual reproduction and clonal propagation.This study investigated the seasonal growth and reproductive characteristics of H.ovalis population through quarterly monitoring in Zhulin,Guangxi,with particular focus on reproductive differences between female and male individuals at the center and edges of seagrass patches.Results showed that the density,coverage,and biomass of H.ovalis peaked in spring,reaching 47%(±9%),(2967.36±661.96)ind·m^(-2),and(37.68±8.85)gDW·m^(-2),respectively.Annual averages were 38%(±14%)for coverage,(1851.02±1036.81)ind·m^(-2)for shoot density,and(27.60±13.97)gDW·m^(-2)for biomass.Sexual reproduction occurred in spring,with distinctfemale and male flowers.Both seagrass density and biomass were significantly higher at patch centers than at edges-a pattern alsomirrored in macrobenthic biomass.Male individuals exhibited significantly shorter internode lengths than females,though nosignificant differences were observed between center and edge positions within either sex.These findings provide fundamentalinsights into the reproductive ecology of H.ovalis,offering scientific support for the conservation and restoration of seagrass beds.
作者
郑侦明
于硕
黄宇洲
朱方超
陈旭阳
熊志祥
刘佩佩
ZHENG Zhenming;YU Shuo;HUANG Yuzhou;ZHU Fangchao;CHEN Xuyang;XIONG Zhixiang;LIU Peipei(Key Laboratory of Tropical Marine Ecosystem and Bioresource,Fourth Institute of Oceanography,Ministry of Natural Resources,Beihai 536000,China;Guangxi Key Laboratory of Beibu Gulf Marine Resources,Environment and Sustainable Development,Fourth Institute of Oceanography,Ministry of Natural Resources,Beihai 536000,China;Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf,Fourth Institute of Oceanography,Ministry of Natural Resources,Beihai 536000,China;School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China)
出处
《热带海洋学报》
北大核心
2026年第2期129-139,共11页
Journal of Tropical Oceanography
基金
广西自然科学基金面上基金项目(2023GXNSFAA026466)
国家自然科学基金项目(42141016)
自然资源部第四海洋研究所基本科研业务费专项资金项目(202203)。
关键词
卵叶喜盐草
季节变化
有性繁殖
中心–边缘效应
广西海域
Halophila ovalis
seasonal variation
sexual reproduction
center-edge effect
Guangxi sea areas
