2010–2011年鼎湖山针阔叶混交林优势树种树干液流数据集

A dataset of dominant tree species sap-flow measurements in a mixed coniferous and broad-leaved forest at Dinghushan(2010–2011)

蒸散是陆地生态系统水资源的主要消耗途径,是一个生理过程和物理环境作用下复杂的、连续发生的过程,具有很大的不确定性,其中如何准确定量蒸散组份中植物蒸腾量是一个重要的科学手段问题。随着电子技术的进步,树干液流测定技术的发展为科学准确定量植物蒸腾提供了可能。作为中国生态系统研究网络(CERN)和国家生态系统观测研究网络(CRERN)成员,鼎湖山森林生态系统定位研究站在2010–2011年对我国南亚热带主要森林类型之一的针阔叶混交林进行了树干液流监测与研究,以优势树种马尾松(Pinus massoniana)、锥栗(Castanopsis chinensis)、木荷(Schima superba)和华润楠(Machilus chinensis)为对象,监测了其树干液流动态。本数据集通过整理和统计,列出了树干液流的实测数据,并包含了相关的数据集构建过程信息。建立和共享本数据集可以为深入探究全球气候环境变化森林水分利用动态与格局等相关科学问题提供观测数据,为该地区的森林经营管理及生态系统功能评价提供基础资料。

Evapotranspiration is one of the main pathways of water resource consumption in terrestrial ecosystem.It is a complex and continuous process that is influenced by the physiological process and physical environment under great uncertainties.How to quantify plant transpiration and its contribution to evapotranspiration accurately is an important issue of scientific methodology.Due to electronic technology advancement,the development of tree sap flow measurement technology makes it possible to quantify plant transpiration scientifically and accurately.As a core member of Chinese Ecosystem Research Network(CERN)and National Ecosystem Research Network of China(CNERN),we have monitored and measured tree sap flow in a coniferous and broad-leaved mixed forest,one of the main forest types in lower subtropical China,over the period from June 2010 to December 2011,at Dinghushan Forest Ecosystem Research Station.The sap flow rate of the dominant tree species of Pinus massoniana,Castanopsis chinensis,Schima superba and Machilus chinensis were monitored.Based on collation and statistics,the data makes a list of the measured data of tree sap flow and incorporates the information on the process of dataset construction.The setup and sharing of the sap-flow database can provide critical data for deep studies on the dynamic and patterns of forest water use under global climate and environment change,supporting forest management and ecosystem service evaluation in this region.