中国科学院青藏高原研究所机构知识库
Advanced  
ITPCAS OpenIR  > 图书馆  > 期刊论文
学科主题: 地理学::自然地理学
题名: Modelling the demand for new nitrogen fixation by terrestrial ecosystems
作者: Xu-Ri (Xu-Ri)1, 2; Prentice, IC (Prentice, I. Colin)3
通讯作者: Xu-Ri
关键词: NET PRIMARY PRODUCTIVITY ; CARBON SEQUESTRATION ; GLOBAL VEGETATION ; ELEVATED CO2 ; FOREST PRODUCTIVITY ; CLIMATE-CHANGE ; N-2 FIXATION ; SOIL ; PATTERNS ; DEPOSITION
刊名: BIOGEOSCIENCES
发表日期: 2017
DOI: 10.5194/bg-14-2003-2017
卷: 14, 期:7, 页:2003-2017
收录类别: SCI
合作性质: 国际
文章类型: Article
类目[WOS]: Ecology; Geosciences, Multidisciplinary ; Environmental Sciences & Ecology; Geology
研究领域[WOS]: Environmental Sciences & Ecology; Geology
英文摘要: Continual input of reactive nitrogen (N) is required to support the natural turnover of N in terrestrial ecosystems. This "N demand" can be satisfied in various ways, including biological N fixation (BNF) (the dominant pathway under natural conditions), lightning-induced abiotic N fixation, N uptake from sedimentary substrates, and N deposition from natural and anthropogenic sources. We estimated the global new N fixation demand (NNF), i.e. the total new N input required to sustain net primary production (NPP) in non-agricultural terrestrial ecosystems regardless of its origin, using a N-enabled global dynamic vegetation model (DyNLPJ). DyN-LPJ does not explicitly simulate BNF; rather, it estimates total NNF using a mass balance criterion and assumes that this demand is met from one source or another. The model was run in steady state and then in transient mode driven by recent changes in CO2 concentration and climate. A range of values for key stoichiometric parameters was considered, based on recently published analyses. Modelled NPP and C : N ratios of litter and soil organic matter were consistent with independent estimates. Modelled geographic patterns of ecosystem NNF were similar to other analyses, but actual estimated values exceeded recent estimates of global BNF. The results were sensitive to a few key parameters: the fraction of litter carbon respired to CO2 during decomposition and plant-type-specific C : N ratios of litter and soil. The modelled annual NNF increased by about 15% during the course of the transient run, mainly due to increasing CO2 concentration. The model did not overestimate recent terrestrial carbon uptake, suggesting that the increase in NNF de-mand has so far been met. Rising CO2 is further increasing the NNF demand, while the future capacity of N sources to support this is unknown.
语种: 英语
WOS记录号: WOS:000399607500001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/8261
Appears in Collections:图书馆_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
V.14(7) 2003-2017 2017.pdf(3086KB)期刊论文作者接受稿开放获取View 联系获取全文

作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China.
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
3.Imperial Coll London, Dept Life Sci, AXA Chair Biosphere & Climate Impacts, Silwood Pk Campus,Buckhurst Rd, Ascot SL5 7PY, Berks, England.

Recommended Citation:
Xu-Ri ,Prentice, IC . Modelling the demand for new nitrogen fixation by terrestrial ecosystems[J]. BIOGEOSCIENCES,2017,14(7):2003-2017.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Xu-Ri (Xu-Ri)]'s Articles
[Prentice, IC (Prentice, I. Colin)]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Xu-Ri (Xu-Ri)]‘s Articles
[Prentice, IC (Prentice, I. Colin)]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: V.14(7) 2003-2017 2017.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院青藏高原研究所 - Feedback
Powered by CSpace