干旱区生态环境知识资源中心(Arid): High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet

Arid

DOI	10.3390/plants8120535
	High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet
	Niu, Ben 1; Zeng, Chaoxu 1,2; Zhang, Xianzhou 1; He, Yongtao 1; Shi, Peili 1; Tian, Yuan 1,2; Feng, Yunfei 3; Li, Meng 1,2; Wang, Zhipeng 1,2; Wang, Xiangtao 1,2; Cao, Yanan 1,2
通讯作者	Zhang, Xianzhou
来源期刊	PLANTS-BASEL
EISSN	2223-7747
出版年	2019
卷号	8 期号:12
英文摘要	The allocation of net primary production (NPP) between above- and belowground components is a key step of ecosystem material cycling and energy flows, which determines many critical parameters, e.g., the fraction of below ground NPP (BNPP) to NPP (f(BNPP)) and root turnover rates (RTR), in vegetation models. However, direct NPP estimation and partition are scarcely based on field measurements of biomass dynamics in the alpine grasslands on the Northern Tibetan Plateau (NTP). Consequently, these parameters are unverifiable and controversial. Here, we measured above- and belowground biomass dynamics (monthly from May to September each year from 2013 to 2015) to estimate NPP dynamics and allocations in four typical alpine grassland ecosystems, i.e., an alpine meadow, alpine meadow steppe, alpine steppe and alpine desert steppe. We found that NPP and its components, above and below ground NPP (ANPP and BNPP), increased significantly from west to east on the NTP, and ANPP was mainly affected by temperature while BNPP and NPP were mainly affected by precipitation. The bulk of BNPP was generally concentrated in the top 10 cm soil layers in all four alpine grasslands (76.1% +/- 9.1%, mean +/- SD). Our results showed that f(BNPP) was significantly different among these four alpine grasslands, with its means in alpine meadow (0.93), alpine desert steppe (0.92) being larger than that in the alpine meadow steppe (0.76) and alpine steppe (0.77). Both temperature and precipitation had significant and positive effects on the f(BNPP), while their interaction effects were significantly opposite. RTR decreased with increasing precipitation, but increased with increasing temperature across this ecoregion. Our study illustrated that alpine grasslands on the NTP, especially in the alpine meadow and alpine desert steppe, partitioned an unexpected and greater NPP to below ground than most historical reports across global grasslands, indicating a more critical role of the root carbon pool in carbon cycling in alpine grasslands on the NTP.
英文关键词	Net primary productivity partitioning below ground biomass root turnover rate model parameters alpine grasslands
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000506648700010
WOS关键词	NET PRIMARY PRODUCTIVITY ; FINE-ROOT PRODUCTION ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; ABOVEGROUND BIOMASS ; GRAZING EXCLUSION ; CARBON DYNAMICS ; USE EFFICIENCY ; CO2 EXCHANGE ; TURNOVER
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
EI主题词	2019-12-01
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311192
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Tangshan Normal Univ, Dept Resource Management, Tangshan 063000, Peoples R China
推荐引用方式 GB/T 7714	Niu, Ben,Zeng, Chaoxu,Zhang, Xianzhou,et al. High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet[J]. 中国科学院地理科学与资源研究所,2019,8(12).
APA	Niu, Ben.,Zeng, Chaoxu.,Zhang, Xianzhou.,He, Yongtao.,Shi, Peili.,...&Cao, Yanan.(2019).High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet.PLANTS-BASEL,8(12).
MLA	Niu, Ben,et al."High Below-Ground Productivity Allocation of Alpine Grasslands on the Northern Tibet".PLANTS-BASEL 8.12(2019).