湛江高桥红树林贝类资源调查

在2002年和2005年2次调查的基础上，2006年7月对湛江高桥的红树区贝类资源在相同取样点进行了定量和定性调查，调查的红树林区有高桥镇的东村、西村、长田、红坎4个点.此次调查结果表明，高桥红树林区贝类种类组成有3纲6亚纲11目26科43属60种.其中樱蛤科有9种；牡蛎科、帘蛤科各5种；蚶科、贻贝科、织纹螺科各4种；其余各科均在3种以下.通过与前两次的调查结果比较分析，高桥红树林区的贝类无论是从栖息密度还是从生物量上都有明显下降的趋势.因此，采取多方位的保护措施，以使红树林区生物多样性资源得到可持续利用势在必行.

Shellfish Resources Survey of Mangrove at Zhanjiang Gaoqiao

After the two basic shellfish survey in the mangrove in 2002 and 2005,the third quantitative and qualitative survey of the shellfish resources of Zhanjiang Gaoqiao mangrove areas was carried out in the same sample point in July 2006.The four sampling stations were Xicun,Dongcun,Hongkan and Changtian in Gaoqiao mangrove.The survey results showed that the shellfish species components in Gaoqiao mangrove included 3 classes,6 subclasses,11 orders,26 families and 60 species belonging to 43 genera.Among those,nine species belonged to Tellinidae;there were five species in the families of Ostreidae and Veneridae respectively;four species in each family of Arcidae,Mytilidae and Nassariidae;there were less than three species in each of the other families.Compared with the two previous survy results,there had been a marked downward trend in shellfish density and biomass.Therefore,it is necessary to take a multi-faceted protection measures,so that the shellfish resources and biodiversity in Zhanjiang mangrove can be in sustainable development and use.