The Influence Of Insect Community Structure And Diversity With Typical Environment Factor In Original Korean Pine Forest

The research collect insect sample in original Korean pine forest with different soil,water and climate factors.Apply a variety of analysis methods to study the data.Reveal the influence of environment factor to insect community in original Korean pine forest.Raise the evaluation and suggestion about the protect of original Korean pine forest.(1)In order to study the difference of insect community structure and dynamic in original Korean pine forest on different type of soil,we had systematically investigated the insect community of the forest on five kinds of soil in Liangshui Natural Reserve.A total of 3547 insects were collected in the survey,belonging to 179 species,41 families and 10 orders.Hymenoptera and Diptera were the dominant groups.The species-abundance relationship conforms to logarithm normal distribution model.The diversity and community stability were in a decrease order?>?>?>?>?.Dynamic of community structure was obviously different in five kinds of habitats.Phytophagous insect was the dominant factor with less of community stability.The original Korean pine forest on thick dark brown soil was suitable for growth and development of insect community.In the forest with thin and buried gley dark brown soil,insect community stability was worse.Suggest to import the enemy insect to improve community stability.(2)Research the impact of the stream distribution in original spruce Korean pine forest of valley.We collected insect sample in four kinds of habitats.The number of insect sample was 3182,belonging to 203 species,46 families and 10 orders.Polar ordination analysis showed that there was the difference of insect community in different habitat.The difference between A and D was the most.The level of diversity in A habitat was high.Neutral insect was the dominant factor in A habitat.In other habitats,dominant impact of neutral insect was weaken with the extend of distance to stream.Water-level fluctuation of stream largerly influenced the diversity of A habitat.The community stability in A habitat was the highest and in D habitat was the lowest.The stream distribution affect the development of insect community in original spruce Korean pine forest of valley.(3)In order to study the response of insect community in original Korean pine forest with the impact of temperature and precipitation climate factor,we had the survey in three kinds of original Korean pine forest.A number of 2378 insects were captured,belonging to 126 species,34 families and 9 orders.In the climatic condition of abruptly enhance?continuous high temperature and rainfall,negative response of insect community in linden Korean pine forest was high,in ribbed birch Korean pine forest was a certain degree and in spruce Korean pine forest was low.Suggest to strengthen the monitor of insect community in linden Korean pine forest and avoid the less of insect community stability.