湿性常绿阔叶林区次生环境鸟类群落动态研究

本文分析了云南哀牢山中山湿性常绿阔叶林区次生环境中鸟类群落的年动态。各类次生环境中,鸟类群落多样性和稳定性之间并非成简单的正相关。比气候顶极群落结构简单的林缘、林窗次生植被中的鸟类群落具有较高的物种多样性,但其群落稳定性较差;在植被简单的沼泽化草甸环境鸟类群落物种的多样性低,却表现其群落结构的稳定性。鸟类群落的稳定性与其生境的稳定性相关。在林缘、林窗鸟种类和密度变化显著,鸟类传播植物种子促进林缘、林窗地带自然更新和植被复化,能加速次生植被恢复到顶极群落的进程。

DYNAMIC RESEARCH OF BIRD COMMUNITIES IN SECONDARY HABITATS,HUMID EVERGREEN BROADLEAF FOREST

This study was mainly carried out near the humid evergreen broadleaf forest in the middle range of Ailaoshan Mountain,Yunnan Province.The annual fluctuations of bird communities in secondary hab- itats were analysed to know the natural regulations of environment changes mostly affacted by human activities.It indicated that there was no simple positive relation between the diversity and stability.The forest edges and dormers with higher species diversity were not stable,however,the swamp meadow habitat with simple bird composition showed more stable.The stability of bird community is relative to the habitat's.The swamp meadow for primary evergreen broadleaf forest too degenerate to rejuvenate can only support a very simple community.Birds prefer the sunlight around the edges and dormers of the jungle,plant seeds with bird feces to be discarded in the areas more suitable for germinating.Birds are very beneficial to forest rejuvenating,so long as the primary forest that supports abundant bird spe- cies are conserved.