The Seasonal Dynamics of Community Structure and Diversity of Lepido-ptera in the Secondary Natural Forest of the Xiaoxing'anling Mountains
To study the community composition and seasonal dynamics of moth diversity in the natural secondary forests of the Xiaoxing'an Mountains,a systematic survey of the moth community was conducted from June to September in 2019 and 2020 using light traps.A total of 14,396 moth specimens were collected,belonging to 439 species from 23 families.The Noctuidae,Pyralidae,Geometridae,and Arctiidae were the dominant families.The moth communities during different periods were moderately or highly dissimilar,with significant differences in the dominant species composition.Each period had a relatively large number of unique species.The moth species diversity index and evenness index reached their maximum values in late August,while the richness index peaked in mid-July.The annual community species-abundance distribution was log-normal,while in individual seasons only mid-July and late August followed a log-normal distribution,and other periods followed a log-series distribution.The composition and diversity of the moth community in the natural secondary forests showed significant seasonal variations,with the community structure dynamically balancing through self-regulation.