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Disentangling effects of natural and anthropogenic drivers on forest net ecosystem production

Authors :
Wang, Y.-R.
Buchmann, N.
Hessen, D.O.
Stordal, F.
Erisman, J.W.
Vollsnes, A.V.
Andersen, T.
Dolman, H.
Wang, Y.-R.
Buchmann, N.
Hessen, D.O.
Stordal, F.
Erisman, J.W.
Vollsnes, A.V.
Andersen, T.
Dolman, H.
Source :
%3Ci%3ESci.+Total+Environ.+839%3C%2Fi%3E%3A+156326.+%3Ca+href%3D%22
Publication Year :
2022

Abstract

<a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/net-ecosystem-production" title="Learn more about Net Ecosystem Production from ScienceDirect's AI-generated Topic Pages" > Net Ecosystem Production </a> (NEP) of forests is the net carbon dioxide (CO2) fluxes between land and the atmosphere due to forests' biogeochemical processes. NEP varies with natural drivers such as precipitation, air temperature, solar radiation, plant functional type (PFT), and <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/soil-texture" title="Learn more about soil texture from ScienceDirect's AI-generated Topic Pages" > soil texture </a> , which affect the gross primary production and ecosystem respiration, and thus the net C sequestration. It is also known that deposition of sulphur and nitrogen influences NEP in forest ecosystems. These drivers' respective, unique effects on NEP, however, are often difficult to be individually identified by conventional <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/bivariate-analysis" title="Learn more about bivariate analysis from ScienceDirect's AI-generated Topic Pages" > bivariate analysis </a> . Here we show that by analyzing 22 forest sites with 231 site-year data acquired from FLUXNET database across Europe for the years 2000–2014, the individual, unique effects of these drivers on annual forest CO2 fluxes can be disentangled using Generalized Additive Models (GAM) for nonlinear regression analysis. We show that S and N deposition have substantial impacts on NEP, where S deposition above 5 kg S ha−1 yr−1 can significantly reduce NEP, and N deposition around 22 kg N ha−1 yr−1 has the highest positive effect on NEP. Our results suggest that <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/air-quality-management" title="Learn more about air quality management from ScienceDirec

Details

Database :
OAIster
Journal :
%3Ci%3ESci.+Total+Environ.+839%3C%2Fi%3E%3A+156326.+%3Ca+href%3D%22
Notes :
application/pdf, English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1341480531
Document Type :
Electronic Resource