Global evidence on nitrogen saturation of terrestrial ecosystem net primary productivity

Simple item page

Simple item page

Full item details

creativework.keywords - en
nitrogen deposition
creativework.keywords - fr
dépôt d'azote
dc.contributor.author
Tian, Dashuan
Wang, Hong
Sun, Jian
Niu, Shuli
dc.date.accepted
2016-02-04
dc.date.accessioned
2024-01-09T15:14:14Z
dc.date.available
2024-01-09T15:14:14Z
dc.date.issued
2016-02-19
dc.date.submitted
2015-10-08
dc.description.abstract - en
The continually increasing nitrogen (N) deposition is expected to increase ecosystem aboveground net primary production (ANPP) until it exceeds plant N demand, causing a nonlinear response and N saturation for ANPP. However, the nonlinear response of ANPP to N addition gradient and the N saturation threshold have not been comprehensively quantified yet for terrestrial ecosystems. In this study, we compiled a global dataset of 44 experimental studies with at least three levels of N treatment. Nitrogen response efficiency (NRE, ANPP response per unit N addition) and the difference in NRE between N levels (ΔNRE) were quantified to test the nonlinearity in ANPP response. We found a universal response pattern of N saturation for ANPP with N addition gradient across all the studies and in different ecosystems. An averaged N saturation threshold for ANPP nonlinearity was found at the N addition rates of 5–6 g m−2 yr−1. The extent to which ANPP approaches N saturation varied with ecosystem type, N addition rate and environmental factors. ANPP in grasslands had lower NRE than those in forests and wetlands. Plant NRE decreased with reduced soil C:N ratio, and was the highest at intermediate levels of rainfall and temperature. These findings suggest that ANPP in grassland or the ecosystems with low soil C:N ratio (or low and high rainfall or temperature) is easier to be saturated with N enrichment. Overall, these results indicate that the beneficial effect of N deposition on plant productivity likely diminishes with continuous N enrichment when N loading surpasses the N saturation threshold for ANPP nonlinearity.
dc.identifier.citation
Tian, D., Wang, H., Sun, J., & Niu, S. (2016). Global evidence on nitrogen saturation of terrestrial ecosystem net primary productivity. Environmental Research Letters, 11(2), Article 24012. https://doi.org/10.1088/1748-9326/11/2/024012
dc.identifier.doi
https://doi.org/10.1088/1748-9326/11/2/024012
dc.identifier.issn
1748-9326
dc.identifier.uri
https://open-science.canada.ca/handle/123456789/1592
dc.language.iso
en
dc.publisher
IOP Publishing
dc.rights.openaccesslevel - en
Gold
dc.rights.openaccesslevel - fr
Or
dc.subject - en
Nature and environment
dc.subject - fr
Nature et environnement
dc.subject.en - en
Nature and environment
dc.subject.fr - fr
Nature et environnement
dc.title - en
Global evidence on nitrogen saturation of terrestrial ecosystem net primary productivity
dc.type - en
Article
dc.type - fr
Article
local.acceptedmanuscript.articlenum
024012
local.article.journalissue
2
local.article.journaltitle
Environmental Research Letters
local.article.journalvolume
11
local.pagination
1-9
local.peerreview - en
Yes
local.peerreview - fr
Oui
Download(s)

Original bundle

Now showing 1 - 1 of 1

Thumbnail image

Name: GlobalEvidenceOnNitrogenSaturationOfTerrestrialEcosystemNetPrimaryProductivity_2016.pdf

Size: 1.92 MB

Format: PDF

Download file

Collection(s)

Page details

Date modified: