Effect Of Different Restoration Approaches On Plant Diversity Of Forest-swamp Communities In Daxing'an And Xiaoxing'an Mountains

The species richness, a,βdiversity indexes of natural, succession (after fire or fellingdisturbance) or planted forest-swamp communities were studied by using transect investigationmethod and Shannon- Wiener or Cody index methods, along the environmental gradients fromswamp to forest in Daxing'an and Xiaoxing'an Mountains, in order to assess the effects of therestoration approaches on plant diversity of forested wetlands, and probe valid restorationapproach for deteriorate forested wetlands. The results showed that:①The species richness ofsuccession after fire or planted forest-swamp communities decreased 59.5% or 40.5% than thatof natural marsh communities, and increased 73.5% or 47.1% than that of natural forest-swampcommunities, so succession approach had advantage over planted approach in Daxing'anMountains; the species richness of succession after felling, fire or planted forest-swampcommunities decreased 37.4%, 21.1% and 11.3% than that of natural forest-swampcommunities, so planted approach had advantage over succession approach in Kiaoxing'anMountains.②The species diversity of succession after fired or planted forest-swampcommunities decreased 40.8% or 90.4% than that of natural marsh communities, and increased50.1% or 12.7% than that of natural forest-swamp communities, so succession approach hadadvantage over planted approach in maintaining species diversity in Daxing'an Mountains; thespecies diversity of succession after felling, fire or planted forest-swamp communitiesdecreased 60.5%, 48.9% and 14.6% than that of natural forest-swamp communities, so plantedapproach had advantage over succession approach maintaining species diversity in Xiaoxing'anMountains.③The species eveness of succession after fired or planted forest-swampcommunities decreased 3.5% or 35.7% than that of natural forest-swamp communities, sosuccession approach had advantage in maintaining species eveness in Daxing'an Mountains;the species eveness of succession after felling, fire or planted forest-swamp communitiesdecreased 57.5%, 45.2% and 4.7% than that of natural forest-swamp communities, so plantedapproach had advantage over succession approach maintaining species eveness in Xiaoxing'anMountains.④The cody indexes of succession after fired or planted forest-swamp ecotonecommunities increased 31.5% or 16.0% than that of natural forest-swamp ecotone community,so succession approach had advantage in maintaining community diversity in Daxing'anMountains; the cody indexes of succession after felling, fire or planted forest-swampcommunities decreased 50.4%, 48.1% and 54.2% than that of natural forest-swampcommunities, so the effects are similar of three approaches in Xiaoxing'an Mountains.⑤Thecommunity similarity indexes of succession after felling, fired or planted forest-swamp ecotonecommunities increased than that of natural forest-swamp ecotone community, decreased community diversity. Succession approach had advantage in maintaining community diversityin Daxing'an Mountains(community similarity indexes raised 5.0% or 85.0%); the communitysimilarity indexes of succession after felling or fire forest-swamp communities had lightadvantage of planted forest-swamp communities (decreased 52.9%, 47.5% or 64.3%) inXiaoxing'an Mountains.⑥Above all, Succession after fire approach had advantage inmaintaining species richness, species diversity and community diversity along the forest-swamp ecotone over planted approach in Daxing'an Mountains, planted approach hadadvantage in maintaining species richness, species diversity and community diversity along theforest-swamp ecotone over Succession after felling, fire approaches in Xiaoxing'an Mountains.