广西科学2026，Vol.33Issue(2)：270-280,11.DOI:10.13656/j.cnki.gxkx.20260603.006
海南陵水红树林修复对沉积物有机碳积累的影响
Effects of Mangrove Restoration on Organic Carbon Accumula-tion in Sediments of Lingshui,Hainan
摘要
Abstract
To investigate the effect of mangrove restoration on sediment organic carbon accumulation and its relationship with microbial carbon metabolism,this study selected the Restoration Forest(RF)and Primary Forest(PF)within the Lingshui Mangrove National Wetland Park as study subjects.The indicators such as sediment Total Organic Carbon(TOC),microbial carbon metabolic activity,and carbon source utilization characteristics were measured,which were integrated with the physical and chemical properties of sediments and environmental factors for comprehensive analysis.The results are summarized as follows:①The restora-tion forests exhibited higher sediment TOC,Total Nitrogen(TN)content,and microbial richness index than the primary forest.②Both sediment TOC content and TN content in the forest restored for 7 years were sig-nificantly higher than those of forests restored for 5 and 3 years.Microorganisms in the sediment of the forest restored for 7 years enhanced utilization of carbohydrate(CH)carbon sources by increasing metabolic activi-ties for β-methyl-D-glucoside,D-galacturonic acid γ-lactone,D-xylose,and D-mannitol.They increased the metabolic activities for Tween 40,Tween 80,and glycogen to enhance utilization of polymer(PM)carbon sources.In addition,they increased the putrescine metabolic activity to enhance utilization of amine(AM)carbon sources.③Principal Component Analysis(PCA)revealed that PC1 was dominated by carbohydrate carbon sources,explaining 55.3％of the total variation,while PC2 was dominated by carboxylic acid carbon sources,explaining 17.6％of the total variation.The two principal components represented the primary con-tributors to microbial carbon metabolism differences.④ Redundancy analysis indicated that TOC content(R2=0.97,P=0.003),TN content(R2=0.83,P=0.005),carbon/nitrogen ratio(C/N,R2=0.94,P=0.006),Total Hydrogen(TH)content(R2=0.88,P=0.005),and pH value(R2=0.79,P=0.005)were the key factors driving microbial carbon utilization.This study elucidates the synergistic mechanism between sediment organic carbon accumulation and microbial metabolism in mangrove restoration,providing crucial theoretical support for mangrove restoration and conservation.关键词
红树林/修复/沉积物有机碳/微生物/碳代谢Key words
mangrove/restoration/sedimentary organic carbon/microorganism/carbon metabolism分类
资源环境引用本文复制引用
向本科,黄茵茵,王晓丹,尹连政,段丹丹..海南陵水红树林修复对沉积物有机碳积累的影响[J].广西科学,2026,33(2):270-280,11.基金项目
国家自然科学基金地区基金项目(42363010),海南省自然科学基金面上项目(422MS061)和海南省自然科学基金高层次人才项目(425RC757)资助. （42363010）
