Study On Moth Diversity Of Wanglang National Nature Reserve

Insect is an important component of ecosystem.the species and number of insects are larger than other animal's.It is important to biodiversity protection.Insect,which is one of members in forest ecosystem,is an vital index of forest health.There is no reports on moth or insect in Wanglang National Nature Reserve.The study is one of biodiversity monitoring items in Wanglang National Nature Reserve.It is important to ecological maintenance and biodiversity conservation.On July,August,October 2007 and April,September 2008,we have investigated moths of Baozi Gou,Qiping Gou,Muyang Chang,Jincao Po,DaCao Ping in Wanglang National Nature Reserve,and researched structure of moth communities with some kinds of index.The main purpose is to provide important theoretic basis and basic information for biodiversity monitoring in this region.The results are as follows:(1)The moth is far more abundant.27274 moths which are collected on July,August,October 2007 and April,September 2008.There are 1010 moth species which belong to 18 families.The families including:Thyatiridae,Bombycidae,Geometridae,Saturniidae, Arctiidae,Lymantriidae,Drepanidae,Agaristidae,Epiplemidae,Tortricidae,Lasiocampidae, Cossidae,Pyralididae,Lithosiidae,Sphingidae,Noctuidae,Notodontidae.Up to now, there are 320 species indentified.(2)The species and individual number changed continuously as times change.The order of species is:July＞August＞September＞October＞April.The individual number is largest in August,secondly in July,and the rule of other months are the same as order of species.(3)The study on moth communities diversity in five monitoring sites disclosed that sepecies(S),individuals(I),diversity index(H') and evenness index(J) maintain high level in Baozi Gou,Qiping Gou,Muyang Chang,Jincao Po.The moth diversity level in Qiping Gou, Jincao Po are so high because of absolute natural environment.The moth individual number in Baozi Gou,Muyang Chang are less than that in Qiping Gou,Jincao Po,because the two monitoring sites are affected by human beings.The moth diversity in Dacao Ping are always low level,in result of the highest altitude,climate change,which have significant impact on moth communities.(4)Statistic analysis according to dominance index(d),diversity(H'),evenness index(J) indicated that Geometridae and Noctuidae are dominant populations.The two dominant population always maintain high index.Diversity index and evenness index are not accordant as times go.By correlation analysis,diversity index and evenness index of each family are not correlative except September.(5)The rule of evenness index with time changing is different from diversity index.Maximum evenness index is on April in Baozi Gou,Qiping Gou,Muyang Chang and Jincao Po.There is no moths appeared on April in Dacao Ping because of cold climate.The evenness index of other months fluctuated differently.(6)Analysis of correlation and clustering,according to species(S),individuals(I),dominance index(d),diversity index(H') and evenness index(J),have some difference.By analysis of similarity and clustering,The distance of Dacaoping is the farest comparing with other 4 sites,and similarity in Dacao Ping is the lowest.It disclosed that the moth communities are the most characteristic in Dacao Ping.According to similarity analysis,the similarity of Baozi Gou and is close to Qiping Gou.But Qiping Gou and Jincao Po are the nearest by clustering analysis.The main reason is that aggregative indicator is not considered in similarity analysis,but rather to think of species only.Anthropic factors in Baozi Gou are more influential than in Qiping Gou,So similarity analysis with species index is not exact.Aggregative factors shluld be used in community analysis.Therefore,results of clustering is more accurate.