小蓬竹种群地理分布及其种群分布格局

Population geographical distribution and population spatial pattern of Drepanostachyun luodianense

采用Greig-Smith相邻格子取样法,研究了小蓬竹的地理分布和种群空间格局及其形成的机制。结果表明:小蓬竹的地理分布格局为集群分布;种群的分布格局随着样方的增大,呈现出随机分布、均匀分布和集群分布的规律;小蓬竹的地理分布和种群空间格局都受到其克隆增殖方式和土壤性质的影响,海拔和年平均降雨量是小蓬竹地理分布格局的主要制约因子,而坡度和坡向是其种群空间格局的主要制约因子。

Geographical distribution, population spatial pattern and formation mechanism of Drepanostachyun luodianense were studied using the Greig-Smith adjacent grid sampling method. The results showed that geographical distribution of D. luodianense was contagious distribution; population distribution pattern presented the rule of random distribution, uniform distribution and contagious distribution with the increase of quadrat. Geographical distribution, population spatial pattern of D. luodianense were impacted by clonal expansion and soil properties, elevation and average annual rainfall were the main restricting factors for geographical distribution of D. luodianense, while gradient and slope direction were the main restricting factors for population spatial pattern.