黄龙山林区辽东栎群落类型划分及其生物多样性研究

根据陕北黄龙林区辽东栎群落30个样地资料，通过聚类对辽东栎进行了类型划分，共划分为6个群丛，分别为辽东栎-土庄绣线菊—披针叶苔草；辽东栎一虎榛子—披针叶苔草；辽东栎—胡枝子—大油芒；辽东栎一水木旬子—披针叶苔草；辽东栎-白刺花—草地早熟禾；辽东栎—黄蔷薇—华北风毛菊。各群落Whittaker多样性指数与其所处的生境条件密切相关，坡向对物种多样性分布起主导作用。

Classification of Quercus liaotungensis Communities and Biodiversity in the Huanglong Mountain

Based on data of 30 plots of Quercus liaotungensis communities in the Huanglong Mountain forest region of Northern Shaanxi Province,the communities could be classified into six association types by clustering method,namely Ass.Quercus liaotungensis-Spiraea pubescens-Carex lanceolata;Ass.Quercus liaotungensis-Ostryopsis davidiana-Carex lanceolata;Ass.Quercus liaotungensis-Lespedeza bicolor-Spodiopogon sibiricu;Ass.Quercus liaotungensis-Cotoneaster multtflorus-Carex lanceolata;Ass.Quercus liaotungensis-Sophora viciifolia-Saussurea mongolica;Ass.Quercus liaotungensis-Rosa hugonis-Poa pratensis.Additionally,the calculation of the species diversity of different types of Q. liaotungensis forest and different exposures of slope showed that Whittaker diversity indices of each community related closely to the habitats;the slope exposures were main factors influencing the species diversity actually water was the key factor.