文昌市八门湾红树林区植物群落特征调查

根椐文昌市八门湾红树林区自然条件和植被分布特征,设置研究样地对该区植物群落特征进行调查,研究不同区域红树林的多样性特征,并对八门湾红树林群落不同乔木树种重要值进行计算。结果显示:八门湾红树林区共有植物28科42属48种,其中乔木层共有植物17科24属29种,重要值前5位的树种是黄瑾、海莲、榄李、正红树、木果楝;灌木层共有植物3科3属3种,包括东风橘、马樱丹、鹊肾树;草本层共有植物11科16属16种,主要有卤蕨、夜香牛、老鼠簕、海芋、金腰箭、菊三七等。不同区域红树林物种多样性存在较大差异,半红树林区香浓-维纳指数、丰富度均大于其它3个红树林区。八门湾红树林区树种组成丰富、结构复杂,但受多种干扰因素的影响,群落多样性分布不均。建议通过加强人工防护,使群落多样性更加丰富。

The Survey on Plant Community Characteristics of Bamenwan Mangroves in Wenchang City

According to the natural conditions and vegetation distribution of Wenchang Bamenwan Mangroves,sampling sites were laid out in the mangroves to investigate the characteristics of plant communities in the sampling sites to study the diversity of the mangroves in different mangrove areas.The important values of different tree species in Wenchang Bamenwan Mangroves were calculated.The results showed that there were 28 families,42 genera and 48 species of plants,including a total of 17 families,24 genera and 29 species in the tree layer in the Bamenwan Mangroves.The first five tree species of the most important value included Hibiscus tiliaceus,Bruguiera sexangula,Lumnitzera littorea (Jack),Rhizophora apiculata,Excoecaria Linn.In the shrub layer of mangroves there were 3 families,3 genera and 3 species,including Atalantia buxifolia (Poir.) Oliv.,Lantana camara L.,Streblus asper Lour.In the herbal layer of the mangroves there were 11 families,16genera and 16 species,including Acrostichum aureum Linn.,Vernonia cinerea(L.) Less.,Acanthus L.,Alocasia macrorrhiza,Synedrellan odiflora,Gynura japonica,etc.There were high differences in diversity between different regions of the mangroves,and the Shannon-Wiener index and the species richness were greater in the semi-mangrove area than in the other three mangrove areas.The composition of tree species was rich and the structure was complicated in the Bamenwan Mangroves,but the diversity of the communities in the mangroves was unevenly distributed due to numerous disturbance factors.It was recommended to strengthen artificial protection to enrich the community diversity.