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Carbon, nitrogen and phosphorus stocks differ among vegetation patch types in a degraded alpine steppe
Yan, Yan1; Tian, Linlin1; Du, Ziyin1; Chang, Scott X.2; Cai, Yanjiang1,3
Corresponding AuthorCai, Yanjiang(yjcai@zafu.edu.cn)
2019-04-01
Source PublicationJOURNAL OF SOILS AND SEDIMENTS
ISSN1439-0108
Volume19Issue:4Pages:1809-1819
AbstractPurpose Degradation of grassland creates diverse vegetation patch types with plant species with different palatabilities, potentially affecting ecosystem productivity and soil organic carbon (SOC) sequestration. This study investigated variations in SOC densities and carbon/nitrogen/phosphorus (C/N/P) ratios among vegetation patch types in a degraded alpine steppe on the Qinghai-Tibetan Plateau. Materials and methods We examined soil, shoot and root C, N and P densities, and C/N/P ratios in a growing season for five vegetation patch types dominated by palatable plant species Stipa purpurea, S. purpurea and Poa litwinowiana, and unpalatable plant species Leontopodium nanum, Artemisia nanschanica, and Oxytropis glacialis. Results and discussion Soil C and N as well as shoot and root densities varied among patch types, but not soil C/N. Patches dominated by unpalatable plant species had a lower SOC density, lower soil and plant N/P ratios, and greater plant nutrient densities than those dominated by palatable plant species. Vegetation patch type strongly influenced nutrient densities and ratios in soil-plant systems, and sampling only areas dominated by palatable plant species may overestimate the C sequestration rate at the ecosystem scale. Conclusions Even though patch-level plant biomass and nutrient density may increase with increasing degradation, the decrease in palatability and SOC storage at the ecosystem scale would impair grassland sustainability as alpine grassland degradation proceeds. The palatability of plants should thus be considered for improving regional SOC stock estimate in future research.
KeywordAlpine grassland C/N/P stoichiometry Grassland degradation Root biomass Soil carbon stock
DOI10.1007/s11368-018-2191-0
Indexed BySCI
WOS KeywordSOIL ORGANIC-CARBON ; N-P STOICHIOMETRY ; NUTRIENT LIMITATION ; LEAF NITROGEN ; GRASSLAND DEGRADATION ; PLANT TRAITS ; TIBET ; REGION ; SCALE ; PATTERNS
Language英语
Funding ProjectState Key Research Development Program of China[2016YFC0502002] ; National Natural Science Foundation of China[41573070] ; National Natural Science Foundation of China[41201053] ; opening fund of Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEnvironmental Sciences ; Soil Science
WOS IDWOS:000462500000019
Funding OrganizationState Key Research Development Program of China ; National Natural Science Foundation of China ; opening fund of Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences
PublisherSPRINGER HEIDELBERG
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25539
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorCai, Yanjiang
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China
2.Univ Alberta, Dept Renewable Resources, 442 Earth Sci Bldg, Edmonton, AB T6G 2E3, Canada
3.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Zhejiang, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Yan, Yan,Tian, Linlin,Du, Ziyin,et al. Carbon, nitrogen and phosphorus stocks differ among vegetation patch types in a degraded alpine steppe[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(4):1809-1819.
APA Yan, Yan,Tian, Linlin,Du, Ziyin,Chang, Scott X.,&Cai, Yanjiang.(2019).Carbon, nitrogen and phosphorus stocks differ among vegetation patch types in a degraded alpine steppe.JOURNAL OF SOILS AND SEDIMENTS,19(4),1809-1819.
MLA Yan, Yan,et al."Carbon, nitrogen and phosphorus stocks differ among vegetation patch types in a degraded alpine steppe".JOURNAL OF SOILS AND SEDIMENTS 19.4(2019):1809-1819.
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