Effects of rising atmospheric CO 2 , climate change, and nitrogen deposition on aboveground net primary production in a temperate forest

Download
(PDF; 1.0 MB)
Cite
Feedback
  • Authors: Wang, Wen; Ma, Shuang; He, Hong; Liu, Zhihua; Thompson, Frank; Jin, Wenchi; Wu, Zheng Fang; Spetich, Martin; Wang, Lei; Xue, Song; Zhang, Wenguang; Wang, Xianwei
  • Publication Year: 2019
  • Publication Series: Scientific Journal (JRNL)
  • Source: Environmental Research Letters
  • DOI: 10.1088/1748-9326/ab3178

Abstract

Temperate forests regrowing from historical land use and land cover change in the eastern US serve as carbon (C) sinks. Environmental drivers have been significantly altered (e.g. rising atmospheric CO2 concentration, warmer temperature, and elevated nitrogen (N) deposition) and will have a wide range of impacts on future forest C sinks. However, the interactions among these environmental drivers are unclear and their effects are subject to uncertainty. We assessed the combined and interactive effects of rising CO2 concentration, climate change (temperature, precipitation), and N deposition on forest aboveground net primary production (ANPP) and their relative contribution to ANPP changes of a temperate forest in the eastern US. We used a process-based ecosystem model PnET-day to simulate coupled cycles of C, water, and N of forest ecosystems. We found that (1) climate change exerted negative effects on ANPP (−0.250 kg C m−2 yr−1) whereas rising CO2 and N deposition enhanced ANPP (+0.253, +0.014 kg C m−2 yr−1); (2) climate change interacted with rising CO2 and N deposition to decrease ANPP (−0.032, −0.018 kg C m−2 yr−1); rising CO2 and N deposition acted in synergy to increase ANPP (+0.014 kg C m−2 yr−1); (3) changes in ANPP were mainly attributed to rising CO2 and climate change whereas N deposition effects and any two- or three-factor interactive effects were relatively small. Our results suggest that the total negative effect sizes will not be offset by total positive effect sizes, thus resulting in reductions in forest ANPP over the 21st century.

  • Citation: Wang, Wen J; Ma, Shuang; He, Hong S; Liu, Zhihua; Thompson, Frank R; Jin, Wenchi; Wu, Zheng Fang; Spetich, Martin A; Wang, Lei; Xue, Song; Zhang, Wenguang; Wang, Xianwei. 2019. Effects of rising atmospheric CO 2 , climate change, and nitrogen deposition on aboveground net primary production in a temperate forest . Environmental Research Letters. 14(10): 104005-. https://doi.org/10.1088/1748-9326/ab3178.
  • Keywords: carbon sink, forest productivity, ecosystem modeling, PnET, net primary production (NPP), temperate forest
  • Posted Date: November 5, 2019
  • Modified Date: November 26, 2019

    • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.