海洋地质前沿2025，Vol.41Issue(5)：90-99,10.DOI:10.16028/j.1009-2722.2025.058
黄河三角洲不同生境土壤碳氮磷及其生态化学计量比特征
Characteristics of soil carbon,nitrogen,phosphorus in soils and their ecological stoichiometric ratios in different habitats of Yellow River Delta
摘要
Abstract
To investigate the spatial patterns of carbon(C),nitrogen(N),and phosphorus(P)contents in soil s and their ecological stoichiometry in the Yellow River Delta wetlands,we analyzed topsoil physicochemical proper-ties,elemental concentrations,and stoichiometric ratios across six distinct habitats:bare tidal flat,breeding ponds,phragmites australis wetlands,tamarix chinensis wetlands,suaeda glauca wetlands,and cultivated lands in the former Yellow River-Diaokou wetland area.Key findings include:① Soil C and N concentrations exhibited signi-ficant habitat-specific variations,ranked as follows:cultivated land＞phragmites australis wetland＞tamarix chinensis wetland＞breeding ponds＞bare tidal flat.Cultivated land displayed the highest mean C(6.1 g/kg)and N(1.1 g/kg)concentrations.In contrast,soil P concentrations showed minimal variation across habitats,peak-ing at 1.03 g/kg.② Regression analyses revealed stronger correlations between soil C and N compared to C-P and N-P relationships across habitats.③ Ecological stoichiometric ratios(C:N:P)in these wetlands were significantly lower than those in other typical wetland ecosystems,with soil N/P ratios notably below the average value of China.④ Environmental drivers differentially influenced elemental distributions:soil C correlated negatively with bulk density,while soil P correlated negatively with moisture content.Both C/P and N/P ratios exhibited inverse rela-tionships with bulk density.These findings highlight that anthropogenic activities,particularly large-scale aquaculture in the Diaokou old channel area after the Yellow River diversion,have altered wetland stoichiometric characteristics and reduced nutrient retention capacity.This study provides critical insights into habitat-specific biogeochemical patterns and their regulatory mechanisms,offering a scientific foundation for wetland conserva-tion and ecological restoration.关键词
黄河三角洲湿地/不同生境/C、N、P/生态化学计量Key words
Yellow River Delta wetland/different habitats/C、N、P/ecological stoichiometry分类
海洋学引用本文复制引用
王凯选,赵俐红,刘枝刚,赵广明,王伟华,苏大鹏,路峰,康志强,张尧,尼鑫..黄河三角洲不同生境土壤碳氮磷及其生态化学计量比特征[J].海洋地质前沿,2025,41(5):90-99,10.基金项目
广西省重点研发计划(桂科AB25069497) （桂科AB25069497）
山东省自然科学基金(ZR2024MD062) （ZR2024MD062）
国家自然科学基金(42076070) （42076070）
中国地质调查局项目"重要河口及湿地滩区生态地质调查"(DD20221775),"黄渤海海岸带重点生态保护修复区综合地质调查"(DD20211401) （DD20221775）
