Gap Dynamics Of Typical Forest In Taiyuan Mounitain, Shanxi Province, China

Forest gap was the inner driver of forest regeneration. Research advance in forest gap disturbance was reviewed in this paper. After that an investigation on forest gap disturbance state was carried out within typical forest type in Taiyue Mountain, shanxi province, then zonal rule of forest gap disturbance was summarized in virtue of the achieved result. Furthermore the researches in the different positions of typical forest gaps, the community character of non-gaps,the relationship between gap disturbance and biodiversity , the relationship between the gap disturbance and regeneration were dealed with in the paper. The results showed that:(1) The average area of the enlarged gaps was 77.4m2 in the Lingkong Mountain in Shanxi province, the average age of the gaps was 13.7years. Gaps which were formed by fallen tree accounted for 44%, and those which were formed by insect pest accounted for 39%. Insect pest was the main factor of gaps forming, . There were 3.7 gap-maker tree of each gap in average, They were mainly appeared in Populus davidiana and Quercus liaotungensis..(2) The species in the gaps were obviously different from those in the non-gaps. The aggregation of some species changed a lot. The aggregating of the most shrubs and seedlings of arbors increased in gaps, while the aggregating of the herbs were opposite. The negative relevancies were higher in gap than in non-gap greatly. The relationships of species diversity among gaps, gaps edge and non-gaps changed with the ages and areas of the gaps. The community characters of herbs in the gaps edge were closer to the community character of the gaps, while the community characters of shrubs and seedlings in the gaps edge were closer to the community character of the non-gaps. the aggregating of...