\documentclass[10pt]{article}

\usepackage{fullpage}
\usepackage{setspace}
\usepackage{parskip}
\usepackage{titlesec}
\usepackage[section]{placeins}
\usepackage{xcolor}
\usepackage{breakcites}
\usepackage{lineno}
\usepackage{hyphenat}





\PassOptionsToPackage{hyphens}{url}
\usepackage[colorlinks = true,
            linkcolor = blue,
            urlcolor  = blue,
            citecolor = blue,
            anchorcolor = blue]{hyperref}
\usepackage{etoolbox}
\makeatletter
\patchcmd\@combinedblfloats{\box\@outputbox}{\unvbox\@outputbox}{}{%
  \errmessage{\noexpand\@combinedblfloats could not be patched}%
}%
\makeatother


\usepackage{natbib}




\renewenvironment{abstract}
  {{\bfseries\noindent{\abstractname}\par\nobreak}\footnotesize}
  {\bigskip}

\titlespacing{\section}{0pt}{*3}{*1}
\titlespacing{\subsection}{0pt}{*2}{*0.5}
\titlespacing{\subsubsection}{0pt}{*1.5}{0pt}


\usepackage{authblk}


\usepackage{graphicx}
\usepackage[space]{grffile}
\usepackage{latexsym}
\usepackage{textcomp}
\usepackage{longtable}
\usepackage{tabulary}
\usepackage{booktabs,array,multirow}
\usepackage{amsfonts,amsmath,amssymb}
\providecommand\citet{\cite}
\providecommand\citep{\cite}
\providecommand\citealt{\cite}
% You can conditionalize code for latexml or normal latex using this.
\newif\iflatexml\latexmlfalse
\providecommand{\tightlist}{\setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}%

\AtBeginDocument{\DeclareGraphicsExtensions{.pdf,.PDF,.eps,.EPS,.png,.PNG,.tif,.TIF,.jpg,.JPG,.jpeg,.JPEG}}

\usepackage[utf8]{inputenc}
\usepackage[english]{babel}



\usepackage{float}








\begin{document}

\title{Suppression of nitrogen deposition on global forest soil CH4 uptake
depends on nitrogen status}



\author[1]{Xiaoyu Cen}%
\author[1]{Nianpeng He}%
\author[2]{Mingxu Li}%
\author[1]{Li Xu}%
\author[3]{Xueying Yu}%
\author[4]{weixiang cai}%
\author[5]{Xin Li}%
\author[6]{Klaus Butterbach-Bahl}%
\affil[1]{Institute of Geographical Sciences and Natural Resoures Research, Chinese Academy of Sciences}%
\affil[2]{Institute of Geographic Sciences and Natural Resources Research}%
\affil[3]{Stanford University}%
\affil[4]{School of Ecology and Nature Conservation, Beijing Forestry University}%
\affil[5]{Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences}%
\affil[6]{Aarhus University}%


\vspace{-1em}



  
  \date{May 17, 2024}


\begingroup
\let\center\flushleft
\let\endcenter\endflushleft
\maketitle
\endgroup





\selectlanguage{english}
\begin{abstract}
Methane (CH4) is the second most important atmospheric greenhouse gas
(GHG) and forest soils are a significant sink for atmospheric CH4.
Uptake of CH4 by global forest soils is affected by nitrogen (N)
deposition; clarifying the effect of N deposition helps to reduce
uncertainties of the global CH4 budget. However, it remains an unsolved
puzzle why N input stimulates soil CH4 flux (RCH4) in some forests while
suppressing it in others. Combining previous findings and data from N
addition experiments conducted in global forests, we proposed and tested
a ``stimulating-suppressing-weakening effect'' (``three stages'')
hypothesis on the changing responses of RCH4 to N input. Specifically,
we calculated the response factors (f) of RCH4 to N input for N-limited
and N-saturated forests across biomes; the significant changes in f
values supported our hypothesis. We also estimated the global forest
soil CH4 uptake budget to be approximately 11.2 Tg yr--1. CH4 uptake
hotspots were located predominantly in temperate forests. Furthermore,
we quantified that current level of N deposition reduced global forest
soil CH4 uptake by \textasciitilde{}3\%. This suppression effect was
more pronounced in temperate forests than in tropical or boreal forests,
likely due to differences in N status. The proposed ``three stages''
hypothesis in this study generalizes the diverse effects of N input on
RCH4, which could help improve experimental design. Additionally, our
findings imply that by regulating N pollution and reducing N deposition,
soil CH4 uptake can be significantly increased in the N-saturated
forests in tropical and temperate biomes.%
\end{abstract}%



\sloppy


\textbf{Hosted file}

\verb`983938_0_art_file_11749841_s6tdzx.docx`  available at \url{https://authorea.com/users/714345/articles/698613-suppression-of-nitrogen-deposition-on-global-forest-soil-ch4-uptake-depends-on-nitrogen-status}

\selectlanguage{english}
\FloatBarrier
\end{document}

