Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2017-09-20 Cooperative journals: 《中国科学院院刊》
Abstract：创新是引领学科发展的动力源泉。在中科院、国家科技部、国家自然科学基金委和广东省的长期支持下，中科院华南植物园鼎湖山森林生态系统定位研究站（以下简称“鼎湖山站”）以长期监测与创新研究为手段，发现成熟森林土壤持续积累有机碳现象，从宏观到微观的不同尺度阐明森林土壤积累有机碳的机理及其驱动机制，引领森林生态系统碳氮水循环过程及其耦合对环境变化的响应与适应规律的研究，推动生态系统非平衡理论的建立；科学量化了全国森林生态系统碳汇现状与潜力，为国家环境外交提供了重要的科学支撑；提出森林与产水量的全球模式并精确给出了控制产水量气候与流域特征参数的临界值，为“森林与产水量”关系的争论提供了新的阐释；发现常绿阔叶林群落适应气候变化在过去30年向灌丛化方向演替并阐明其受主要环境因子影响的机理。研究成果为森林固碳与水资源效应的科学评估、自然保护区和生态环境建设的国家需求提供了理论支撑。鼎湖山站成为国内外无可替代的野外科技支撑平台和国际著名的森林生态系统科学研究基地，也是中科院和广东地区生态学人才培养基地。
Subjects: Biology >> Botany >> Plant ecology, plant geography submitted time 2016-05-27
Abstract：
Peer Review Status:
Awaiting Review
Subjects: Biology >> Botany >> Plant ecology, plant geography submitted time 2016-05-03
Abstract： ：Abstract The main distribution areas of tropical virgin forests in Jianfengling (JFL), Bawangling (BWL), Wuzhishan (WZS), Diaoluoshan (DLS), Yinggeling (YGL) of Hainan Island were selected, and the 100 cm deep soil samples were sampled and analyzed. SOC density in its areas were estimated by soil vertical fitting method and soil stratification method to discover its soil organic carbon distribution characteristic in tropical virgin forests of Hainan Island. Results showed that: (1) The average SOC densities using soil vertical fitting method in these regions were 14.98, 18.46, 16.48, 18.81, 16.66 kg?m–2, respectively,. The SOC densities using soil stratification method were 14.73, 16.24, 15.50, 16.91, 15.03 kg?m–2, respectively. The former was significantly higher than the latter (p < 0.05). Soil vertical fitting method was available used for calculating SOC density when soil was natural soil without disturbance. (2) The proportions of the first 0–30 cm interval related to the total content of the 1 m profile in these areas are 50.50%, 48.56%, 43.49%, 47.37% , 42.88%, respectively. (3) There was significantly negative correlation between SOC density and Shannon-Wiener index, Simpson index, species richness, soil bulk density; significantly positive correlation between SOC density and altitude, soil porosity, soil nitrogen. However, there was no significantly correlation between SOC density and slope, biomass, average diameter at breast height, average height. (4) Hainan the study area was located in the low latitudes, the rich rainfall and high temperature conditions which accelerated the decomposition of organic matter and nutrient recycling, which result in that SOC densities in tropical virgin forests of Hainan Island were significantly lower than that of SOC density in China.
Peer Review Status:Awaiting Review
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