Degradation leads to dramatic decrease in topsoil but not subsoil root biomass in an alpine meadow on the Tibetan Plateau, China
文献类型：期刊论文
| 作者 | Zhang, Zhenchao2,3; Liu, Miao1,2; Sun, Jian2; Wei, Tianxing4 |
| 刊名 | JOURNAL OF ARID LAND
 |
| 出版日期 | 2020-11-13 |
| 页码 | 13 |
| ISSN号 | 1674-6767 |
| 关键词 | belowground biomass soil properties plant community structure degradation alpine meadow Tibetan Plateau |
| DOI | 10.1007/s40333-020-0074-x |
| 通讯作者 | Sun, Jian(sunjian@igsnrr.ac.cn) |
| 英文摘要 | Understanding the effects of degradation on belowground biomass (BGB) is essential for assessment of carbon budget of the alpine meadow ecosystem on the Tibetan Plateau, China. This ecosystem has been undergoing serious degradation owing to climate change and anthropogenic activities. This study examined the response of the vertical distribution of plant BGB to degradation and explored the underlying mechanisms in an alpine meadow on the Tibetan Plateau. A field survey was conducted in an alpine meadow with seven sequential degrees of degradation in the Zoige Plateau on the Tibetan Plateau during the peak growing season of 2018. We measured aboveground biomass (AGB), BGB, soil water content (SWC), soil bulk density (SBD), soil compaction (SCOM), soil organic carbon (SOC), soil total nitrogen (STN), soil total phosphorus (STP), soil available nitrogen (SAN), and soil available phosphorus (STP) in the 0-30 cm soil layers. Our results show that degradation dramatically decreased the BGB in the 0-10 cm soil layer (BGB(0-10)) but slightly increased the subsoil BGB. The main reason may be that the physical-chemical properties of surface soil were more sensitive to degradation than those of subsoil, as indicated by the remarked positive associations of the trade-off value of BGB(0-10) with SWC, SCOM, SOC, STN, SAN, and STP, as well as the negative correlation between the trade-off value of BGB(0-10) and SBD in the soil layer of 0-10 cm. In addition, an increase in the proportion of forbs with increasing degradation degree directly affected the BGB vertical distribution. The findings suggest that the decrease in the tradeoff value of BGB(0-10) in response to degradation might be an adaptive strategy for the degradation-induced drought and infertile soil conditions. This study can provide theoretical support for assessing the effects of degradation on the carbon budget and sustainable development in the alpine meadow ecosystem on the Tibetan Plateau as well as other similar ecosystems in the world. |
| WOS关键词 | BELOW-GROUND BIOMASS ; SOIL ORGANIC-CARBON ; GRASSLAND DEGRADATION ; ABOVEGROUND BIOMASS ; SPECIES-DIVERSITY ; NITROGEN-FIXATION ; LAND DEGRADATION ; STOICHIOMETRY ; VEGETATION ; PHOSPHORUS |
| 资助项目 | State Key Research Development Program of China[2016YFC0501803] ; State Key Research Development Program of China[2016YFC0501802] ; China Postdoctoral Science Foundation[2017M620889] ; Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0405] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | SPRINGER HEIDELBERG |
| WOS记录号 | WOS:000588887100002 |
| 资助机构 | State Key Research Development Program of China ; China Postdoctoral Science Foundation ; Second Tibetan Plateau Scientific Expedition and Research |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156555]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sun, Jian |
| 作者单位 | 1.Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Synth Res Ctr Chinese Ecosyst Res Network, Beijing 100101, Peoples R China 3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Beijing Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhenchao,Liu, Miao,Sun, Jian,et al. Degradation leads to dramatic decrease in topsoil but not subsoil root biomass in an alpine meadow on the Tibetan Plateau, China[J]. JOURNAL OF ARID LAND,2020:13. |
| APA | Zhang, Zhenchao,Liu, Miao,Sun, Jian,&Wei, Tianxing.(2020).Degradation leads to dramatic decrease in topsoil but not subsoil root biomass in an alpine meadow on the Tibetan Plateau, China.JOURNAL OF ARID LAND,13. |
| MLA | Zhang, Zhenchao,et al."Degradation leads to dramatic decrease in topsoil but not subsoil root biomass in an alpine meadow on the Tibetan Plateau, China".JOURNAL OF ARID LAND (2020):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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