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...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W h ittaker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。展开更多
Using the spectral analysis method, this paper studied the young Quercus variabilis population that had obvious increase characteristics, and analyzed the population’s stability under disturbance. The result shows th...Using the spectral analysis method, this paper studied the young Quercus variabilis population that had obvious increase characteristics, and analyzed the population’s stability under disturbance. The result shows that Q.variabilis population has 20-47 year periodic fluctuations under the basic one, which is related to its regeneration and therefore can maintain its stability itself. But the internal periodic length of the basic one cannot be distinguished because the tree’s age is not old enough. The results also shows that human disturbance have affected the population’s fluctuation.展开更多
文摘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W h ittaker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。
文摘Using the spectral analysis method, this paper studied the young Quercus variabilis population that had obvious increase characteristics, and analyzed the population’s stability under disturbance. The result shows that Q.variabilis population has 20-47 year periodic fluctuations under the basic one, which is related to its regeneration and therefore can maintain its stability itself. But the internal periodic length of the basic one cannot be distinguished because the tree’s age is not old enough. The results also shows that human disturbance have affected the population’s fluctuation.
