%0 Journal Article
%A CHEN De-Xiang
%A LI Xiang
%A LI Yi-De
%A MA Su-Hui
%A XU Han
%A ZHOU Zhang
%T Long-term Decline of Carbon Sink and Its Underlying Mechanisms in Tropical Montane Rainforest of Jianfengling,Hainnan Island
%D 2018
%R 10.7525/j.issn.1673-5102.2018.05.017
%J Bulletin of Botanical Research
%P 766-774
%V 38
%N 5
%X Tropical forest plays a key role in the estimation of global C balance and C budget by being considered as one of the most important terrestrial ecosystem.We utilized replicated and intensive ecological measurements of forest plots from 1984 to 2013 in Jianfengling, Hainan Island to quantify the long-term carbon dynamics of tropical forests over decades, and to unravel the drivers behind these changes. Our results showed that carbon sequestration in Jianfengling tropical montane rainforest is similar to other tropical regions of the world with a net sink of 0.71&#177;0.22 mg&#183;C&#183;hm<sup>-2</sup>&#183;a<sup>-1</sup> over the three decades. However, carbon sequestration ability in Jianfengling showed a decreasing trend, this may mainly due to high biomass mortality resulting from drought and typhoon. Although a consistent result of decreasing in carbon sequestration has been found, while high fluctuation and great variation were happened among plots, which may have a great implication that the effects of extreme events on carbon sequestration in tropical forests were possibly constrained by the condition of microsite and structure of forest itself. Therefore, more studies on carbon sequestration are required in tropics in order to reduce the uncertainties in the estimation of global carbon cycle and carbon budget.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2018.05.017