尖峰岭热带山地雨林长期减弱的碳汇及其环境驱动因素分析

doi:10.7525/j.issn.1673-5102.2018.05.017

植物研究 ›› 2018, Vol. 38 ›› Issue (5): 766-774.doi: 10.7525/j.issn.1673-5102.2018.05.017

尖峰岭热带山地雨林长期减弱的碳汇及其环境驱动因素分析

李翔¹, 周璋¹, 马素辉², 许涵¹, 李意德¹, 陈德祥¹

1. 中国林业科学研究院热带林业研究所, 海南尖峰岭森林生态系统国家野外科学观测研究站, 广州 510520;
2. 北京大学城市与环境学院, 北京 100781

收稿日期:2018-03-26 出版日期:2018-09-15 发布日期:2018-08-31
通讯作者: 陈德祥 E-mail:dexiangchen@126.com
作者简介:李翔(1993-),男,硕士研究生,主要研究方向为热带森林生物量长期动态监测。
基金资助:
林科院基本科研业务费专项重点项目"海南岛热带森林生物量及碳储量空间格局研究（CAFYBB2016ZD002）"；国家基金重大项目子专题"尖峰岭热带山地雨林生态系统碳水交换的动态特征（41773071）"

Long-term Decline of Carbon Sink and Its Underlying Mechanisms in Tropical Montane Rainforest of Jianfengling,Hainnan Island

LI Xiang¹, ZHOU Zhang¹, MA Su-Hui², XU Han¹, LI Yi-De¹, CHEN De-Xiang¹

1. Research Institude of Tropical Forestry, Chinese Academy of Forestry, Jianfengling Long-term Research Station for Tropical Forest Ecosystem, Guangzhou 510520;
2. College of Urban and Environmental Sciences, Peking University, Beijing 100781

Received:2018-03-26 Online:2018-09-15 Published:2018-08-31
Supported by:
Special key project of the basic scientific research operating expenses of Chinese academy of forestry "Study on the spatial pattern of biomass and carbon reserve in Hainan island (CAFYBB2016ZD002)";The major sub-project of national fund "Dynamic characteristics of carbon-water exchange in tropical mountain rain forest ecosystem of jianfengling(41773071)"

摘要/Abstract

摘要： 热带森林作为全球最为重要的陆地生态系统之一，在当前气候变化背景下，其碳循环动态对于全球碳平衡状况及碳收支估算具有重要的影响作用。本研究利用尖峰岭热带山地雨林长期样地（P8401、P8402、P8901）自1984~2013年的清查数据，分析生物量长期动态变化，并结合降水等环境因子，试图探求尖峰岭热带山地雨林固碳能力的影响机理。结果表明：海南岛尖峰岭热带山地雨林仍然具有一定的碳汇能力，碳汇速率平均为0.71±0.22 mg·C·hm^-2·a^-1，与世界其他地区热带森林碳汇能力相当，但其碳汇能力却存在逐渐减少的趋势。碳汇能力的减少主要源于干旱和台风暴雨导致死亡生物量的显著增加，但不同样地间存在明显的差异，说明极端气候事件对热带森林固碳能力的影响同时也受局地环境条件和森林自身状况的影响，急需开展更多点上热带森林固碳能力对气候变化的影响研究，以减少热带森林在全球碳循环中估算中的不确定性。

关键词: 尖峰岭, 热带山地雨林, 生物量, 极端气候事件, 固碳能力

Abstract: 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±0.22 mg·C·hm^-2·a^-1 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.

Key words: Jianfengling, tropical montane rainforest, biomass, extreme events, carbon sequestration ability

中图分类号:

S718.55

李翔, 周璋, 马素辉, 许涵, 李意德, 陈德祥. 尖峰岭热带山地雨林长期减弱的碳汇及其环境驱动因素分析[J]. 植物研究, 2018, 38(5): 766-774.

LI Xiang, ZHOU Zhang, MA Su-Hui, XU Han, LI Yi-De, CHEN De-Xiang. Long-term Decline of Carbon Sink and Its Underlying Mechanisms in Tropical Montane Rainforest of Jianfengling,Hainnan Island[J]. Bulletin of Botanical Research, 2018, 38(5): 766-774.

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尖峰岭热带山地雨林长期减弱的碳汇及其环境驱动因素分析

Long-term Decline of Carbon Sink and Its Underlying Mechanisms in Tropical Montane Rainforest of Jianfengling,Hainnan Island

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