北京市杨镇湿地植物群落多样性及优势种重要值的研究

<title>ANT DIVERSITY AND SEAEONAL VARIATION OF KEY VALUE OF DOMINANT SPECIES IN YANGZHEN WETLAND

通过研究杨镇湿地的植被分布、植物群落、种类及地上部分的生物量,对湿地建群种及部分优势种在整个湿地植被的重要值和湿地群落多样性进行了分析。结果表明杨镇湿地区的植物种类有55科、158属、246种(或变种);湿地的植被可分为34个群落,包括25个沼生群落和9个水生群落;湿地优势种重要值的季节性变化明显。湿地的植物多样性资源丰富,是个潜在的物种基因库。如国家三级渐危植物鹿藿(Clycine soja野大豆),稀见的芡实(Euryale ferox鸡头米)等。由于近来北京地区持续干旱等原因使湿地面积呈减少的趋势,导致旱生植物蓰草(Humulus scandens)等大量入侵,正在迅速改变着湿地的原始景观状况。

<abstract>e importance value of constructive species and dominant species and community diversity in wetland were analyzed through studying the vegetation, community, biomass and the species of the plants of YangZhen wetland. The results are: there are 55 families, 158 generaes, 246 species in Yangzheng wetland; there are thirty-four plant communities, including twenty - five swamp communities and nine aqonitic communities. In which, 55 families, 135 generaes,214 species are wild species,the species density of wild plant is 127.7. The important value of dominant species varieties obviously as season rotates in wetland. Yangzhen wetland is a potential gene - warahouse of plant species. There are some rare plants Growing in the wetland, Such as Glycine soja and Euryale ferox . So, Yangzhen wetland not only poses important scientific research values, but also its values and potential values on ecosystem and aesthetics and environment are more important to our capital that badly shorten of water. At present, some xerophytes such as Humulus scandens are largely invading the wetland, rapidly destroying its original sight.