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\begin{document}

\title{Autotrophic and heterotrophic contributions to soil respiration in a
subtropical camphor tree forest}



\author[1]{Wende Yan}%
\author[2]{Yuanying Peng}%
\author[3]{Wei Zheng}%
\author[4]{Xiaoyong Chen}%
\affil[1]{Central South University of Forestry and Technology}%
\affil[2]{Lewis University}%
\affil[3]{Guangxi Forestry Research Institute}%
\affil[4]{Governors State University}%


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  \date{May 24, 2024}


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\begin{abstract}
Understanding the contributions of autotrophic respiration (Ra) and
heterotrophic respiration (Rh) to total soil respiration (Rs) is
necessary for accurate prediction of global carbon balance and net
ecosystem production under environmental change. In this research,
annual Rs and Rh and estimated were investigated by using a root
trenching experiment in a Camphor tree (Cinnamomum camphora) forest in
subtropical China for two years to qualify the relative contribution of
Ra and Rh components to Rs, and to determine the environmental factors
that control the seasonal changes in Ra, Rh and Rs. The results showed
that annual mean Rs was 405 \selectlanguage{ngerman}± 219 gC m-2 year-1 in the studied forests,
of which Rh and Ra were 240 ± 120 gC m-2 year-1 and 164 ±102 gC m-2
year-1, respectively. The contribution of Rh to Rs averaged 58.1\%,
ranging from 45 to 81\%. The seasonal changes in Rs and Rh were highly
correlated with soil temperature, but not to soil water content. Our
results suggest microbial community and activity make a primary
contribution to carbon flux released from soil to atmosphere in the
studied forest ecosystems.%
\end{abstract}\selectlanguage{ngerman}%



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