北京师范大学学报（自然科学版）2025，Vol.61Issue(6)：952-959,8.DOI:10.12202/j.0476-0301.2025093
青海祁连山国家公园高寒沼泽湿地土壤碳氮磷生态化学计量特征及其驱动因素
Ecological stoichiometry and driving factors of soil carbon,nitrogen,and phosphorus in the alpine marsh wetlands of Qinghai Qilian Mountain National Park
摘要
Abstract
Alpine marsh wetlands in the Qilian Mountain National Park of Qinghai are important components in the ecosystem of the Qinghai-Xizang Plateau.Ecological stoichiometries of soil carbon(C),nitrogen(N),and phosphorus(P)in this region are crucial to the understanding of alpine wetland ecological processes and nutrient cycling mechanisms.In this study,54 soil samples with different degrees of degradation and from varied soil depths were collected.One-way ANOVA was used to evaluate effects of degradation degree and soil layer depth on C,N,and P content and their ecological stoichiometric ratios.Multiple regression and hierarchical segmentation methods were used to explore driving mechanisms of topography,climate,soil,and vegetation factors on ecological stoichiometric characteristics.As wetland degradation intensifies,soil organic carbon,total nitrogen,and total phosphorus content decrease by 28.1%,36.6%,and 36.3%,respectively,with n(C)/n(P)and n(N)/n(P)ratios decreasing but n(C)/n(N)ratios increasing.Both element content and stoichiometric ratios were found to decrease with increasing soil depth.n(C)/n(N)and n(N)/n(P)ratios suggest nitrogen limitation in the soil,while the n(C)/n(P)ratio indicates relatively sufficient phosphorus.Soil ecological stoichiometric characteristics are driven by multiple factors,with n(C)/n(N)being primarily influenced by soil properties(35.19%contribution),n(C)/n(P)regulated by vegetation-soil interactions(29.12%and 28.17%),and n(N)/n(P)mainly controlled by climate factors(34.78%).In summary,nutrient element cycling characteristics in alpine marsh wetland ecosystems are identified,insights into the coupled relationships of C,N,and P in alpine wetland ecosystems,nutrient limitation mechanisms,and ecological responses are provided.关键词
高寒沼泽湿地/生态化学计量/碳氮磷/驱动因素/祁连山国家公园Key words
alpine marsh wetland/ecological stoichiometry/carbon,nitrogen,and phosphorus(C,N,P)/driving factors/Qilian Mountain National Park分类
社会科学引用本文复制引用
周楠,毛旭锋,于红妍,金鑫,张乐乐,金彦香,杜凯,杨永潇,王贤颖..青海祁连山国家公园高寒沼泽湿地土壤碳氮磷生态化学计量特征及其驱动因素[J].北京师范大学学报（自然科学版）,2025,61(6):952-959,8.基金项目
国家自然科学基金地区基金资助项目(42161020) （42161020）
