宁夏香山荒漠草原区生物多样性与环境特征研究

Studies on the environment and biodiversity of the desert grassland area in Xiangshan Mountain,Ningxia

采用大样地、典型固定样地调查方法,对宁夏香山荒漠草原区生物多样性与环境特征进行了研究。结果表明,研究区所调查151种植物分属39科、95属;植物群落分布体现了山地荒漠草原的特征,多数植物群落类型分布在山地阴坡;群落多样性动态受时间、地形影响较大,在土壤属性中受土壤含水量影响较大;灌丛植被在该山地生态系统中处于重要地位,是生态功能维持的主要因素;昆虫群落符合干旱地区草地植物群落特征,大型动物的稀有也提示对该地区进行生物多样性保护日益紧迫。

Based on the investigation of the large plots and typical samples, the environment and biodiversity of the desert grassland area in Xiangshan Mountain,Ningxia were analyzed. The results show that the 151 species investigated in the region belong to 39 families or 95 genera. The distribution of plant community fits the characteristics of mountainous desert grassland. The most types of the community are in the shady slope of the mountain. The dynamics of the community diversity are influenced by the time, topography, and soil moisture content very much. Shrubby community is the most important factor to maintain the function of ecosystem. It is the keystone for the biodiversity conservation in the region. The insect communities are fitting with the characteristics of grassland communities in the dry area. Few of large animals indicates that the conservation must be done.