Population diversity and temporal dynamics of large moths at different altitudes in Mount Tianmu
[Objective]With the clarification of the relationships and temporal dynamics of large moth species in Mount Tianmu in Zhejiang Province,this paper aims to provide a theoretical basis for the insect investigation in Mount Tianmu.[Method]Large moth specimens were collected from Zhejiang Mount Tianmu National Nature Reserve at different altitudes during the four-month period from May to August in 2022 before a systematic analysis was conducted of them and their population temporal dynamics.[Result]A total of 3 367 large moth specimens were collected,belonging to 269 species of 25 families.The dominant taxa were the families Geometidae,Crambidae,Sphingidae and Noctuidae.At the altitude ranges of 600-1 200 m,the Simpson index,Shannon index,Margalef richness index and Pielou uniformity index were high,and the overall correlation was positive.The species-multidegree curve of large moths tended to be lognormal distribution at this altitude gradient,and the rest of altitude gradients were consistent with the niche priority occupation hypothesis.The number of large moth species was the largest with the strongest stability in July.[Conclusion]The large moth species were sensitive to time in Mount Tianmu with the number of species and individuals of them increasing at first and then decreasing from May to August.Species diversity of large moths increased at first and then decreased with the increase of altitude,and the similarity coefficient between medium and low altitude gradients was at medium and high levels.[Ch,3 fig.4 tab.20 ref.]
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