| The insect survey by sweep net, trap-lamps and pit fall traps methods in different restoring stages zones in Liangshui natural reserve was done between May to September 2013 and May to September 2014. We analyzed the community structure and interspecific relationship, also evaluated and provided a scientific way for recovery and rebuilding forest ecosystem(1)In order to study the insect community structure of typical artificial and primeval forests during different restoring stages in Xiaoxing’an Mountains, we systematically investigated the insect communities of four typical forests in Liangshui natural reserve. A total of 11,712 insect species were collected, which is belonging to 293 species,81 families and 10 orders. Among these insect species, the insects in orders of Hymenoptera, Diptera, and Coleoptera were the dominant groups. Through the relative stability analysis of insect communities in different forest types, the insect community in Xing’an parch plantation and primeval broad-leaved/Korean pine forest are more stable than those of other forest types. The principal components analysis indicated that predatory and neutral insects played role in insect community stability showing the increase of community stability with the increase of predatory insect species and quantity. Polar ordination analysis showed that the insect community in Korean pine plantation was close to the original broad-leaved/Korean pine forest. Comparing with the original broad-leaved/Korean pine forest, the above results showed the types of insect, the numbers of insect enemy and community species were lower in Xing’an larch plantation, fir and spruce plantation and the Korean pine plantation, respectively.(2)In order to study the moth community structure and diversity of different forest restoration areas and primeval forest in Xiaoxing’an Mountains, we had systematically investigated the moth communities of four typical forest areas in Liangshui Natural Reserve. Atotal of 56079 specimens of 598 species were collected, which belonged to 28 families of Lepidoptera, with Noctuidae, Geometridae being the dominant Families and Pleuroptya ruralis (Scopoli), Ghoria gigantea (Oberthur), Cosmia unicolora (Staudinger) being the dominant Species. The species-abundance analysis on moth communities showed that the curve was in accordance with the log-normal hypothesis. Characteristic indices of moth community diversity analysis indicated the diversity index and the evenness index was Ⅳ>Ⅲ>Ⅱ>Ⅰ. However, the Dominant concentration index was Ⅰ>Ⅲ>Ⅱ>Ⅳ. Polar ordination and community similarity analysis showed the moth community structure of all forest restoration areas had little different with the primeval forest area. The conclusion is that the environmental conditions which moths depend on in Xiaoxing’an Mountains are stable, and the ecological environmental quality preserves quite well.(3) In order to research the niche and competition among main groups of insect community in Xiaoxing’an Mountains, we systematically investigated the insect communities of five typical forests in Liangshui natural reserve. A total of 14,224 insect species were collected, which is belonging to 383 species,97 families and 11 orders. The results showed that the spatial niche and the time niche breadth of dominant taxon was high and the breadth of Hymenoptera and Diptera was higher than the other insect community. The niche similarity coefficient and the niche overlaps between the main groups was high, there may exist interspecific competition among those groups. The niche similarity coefficient and the niche overlaps analysis showed that spider groups and insects groups were closely related, spiders were important regulators in Liangshui natural reserve insect ecological system. The space niche similarity coefficient was higher than the time niche similarity coefficient of all groups of insect community, showed similar environmental condition between different typical forests during different restoring stages and rimeval forests. |
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