渤海湾滨海湿地土壤线虫群落分布特征OA

The coastal wetlands along the western Bohai Bay hold significant ecological value,with soil nematodes serving as key bioindicators in evaluating wetland ecosystem health and restoration.This study collected soil samples from four wet-lands along the western Bohai Bay—Qilihai Wetland,National Marine Park Tidal Wetland,Longdao Tidal Wetland,and Lingang Phase Ⅱ Wetland.A total of 12,064 soil nematodes were isolated,belonging to 3 classes,7 orders,15 families,and 22 genera.The nematode community was analyzed in terms of genus composition,diversity,trophic groups,ecological in-dices,and floristic analysis.Results indicated that the nematode abundances(relative to dry soil)in the Qilihai Wetland,National Marine Park Tidal Wetland,Longdao Tidal Wetland,and Lingang Phase Ⅱ Wetland were 1,151,1,121,890,and 860 individuals per 100 g,respectively.No significant differences were observed in the total nematode abundance among these wetlands.Compared to the other wetlands,Lingang Phase Ⅱ Wetland exhibited lower abundance of bacterivorous nematodes,increased abundance of predatory and omnivorous nematodes,decreased channel index and elevated maturity index.Redundancy analysis identified soil organic carbon and moisture content as primary environmental factors influencing the nematode community.Lingang Phase Ⅱ Wetland showed characteristics of nutrient enrichment and a mature food web structure,whereas the food web structures in the other wetlands tended toward degradation.This study provides important scientific evidence for the ecological health assessment and scientific management of coastal wetlands along the western Bohai Bay.