Effect of microhabitat on beta diversity of ground-dwelling arthropods community in an island-like swamp forest at Daxing'anling Mountains
Island-like swamp forest is a unique ecosystem in the eastern Daxing'anling Mountains.Pitfall trap method was used to investigate ground-dwelling arthropod community and habitat characteristics.We analyzed the response of ground-dwelling arthropod community beta diversity to microhabitat characteristics in three typical is-land-like swamp forests,namely,pure larch forest(Larix gmelinii),pure birch forest(Betula platyphylla),and larch and birch mixed forest.A total of 544 arthropods,belonging to 5 classes,14 orders,67 families and 61 gene-ra,were collected.The ground-dwelling arthropod communities were mainly dominated by Coleoptera,Diptera lar-vae,Hymenoptera,Aranea,and Collembola.Among them,the individual abundance and taxa(order)richness was the highest in the birch pure forest and the lowest in the larch pure forest.There were no significant differences in total beta diversity(βsor)and species turnover(βsim)and species nestedness(βnes)components of ground-dwelling arthropod community in the three habitats,but there were differences in βsim and βnes components in the same taxa(P＜0.05).Theβsim/βsor ratio was greater than 50％,indicating that changes in ground-dwelling arthro-pod community diversity in the island-like swamp forests were mainly affected by species turnover,and the taxa with greater abundance had a greater impact on beta diversity.The diversity of ground-dwelling arthropod communi-ty was positively correlated with surface temperature and moisture(r2=0.120-0.128,P＜0.01),major soil che-mical properties(r2=0.229-0.230,P＜0.01),and litter layer thickness(r2=0.148,P＜0.01).Surface tempera-ture and moisture,main soil chemical properties and vegetation characteristics together explained 11.03％of the variation of ground-dwelling arthropod community.However,88.97％of the variation was not explained.Our results suggested that habitat patch heterogeneity caused by soil over-wetting and over-nutrient directly affected the habitat selection preference of ground-dwelling arthropods in the island-like swamp forests and had a complex effect on the maintenance of beta diversity.
community compositioncoexistence patternsoil physicochemical propertyredundancy analysisDaxing'anling Mountains
万方数据
维普
