基于太白红杉树轮宽度重建近172年太白山自然保护区7月NDVI  

Reconstruction of July NDVI over 172 years based on tree-ring width of Larix chinensis in Taibai Mountain Nature Reserve,China

作　　者：朱显亮 李书恒[1] 白红英[1] 侯丽[1] 陈兰[1] 秦进[1] ZHU Xian-liang;LI Shu-heng;BAI Hong-ying;HOU Li;CHEN Lan;QIN Jin(College of Urban and Environment Science,Northwest University/ Shaanxi Province Key Laboratory of Earth Surface System and Environmental Carrying Capacity,Northwest University,Xi＇ an 710127,China）.)

机构地区：[1]西北大学城市与环境学院/西北大学陕西省地表系统与环境承载力重点实验室,西安710127

出　　处：《应用生态学报》2018年第7期2382-2390,共9页Chinese Journal of Applied Ecology

基　　金：国家林业公益性行业科研专项(201304309);陕西省自然科学基金项目(2014JQ5172);黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG1611)资助~~

摘　　要：利用太白山自然保护区南北坡采集的太白红杉树轮数据、气象数据和区域NDVI数据进行相关分析,重建太白山自然保护区近172年NDVI变化序列.结果表明:太白山自然保护区的NDVI年内变化规律与植被生长周期具有一致性,生长季的水热条件是控制NDVI值的主要因素;树轮宽度与植物生长季的NDVI呈显著正相关,7月相关性最强.利用长时间序列的树轮宽度指数重建太白山自然保护区历史时期7月的NDVI变化序列,发现重建的历史时期7月NDVI变化序列存在5个低值时段和5个高值时段,这些时段与秦岭地区的气候变化趋势及旱灾发生记录相对应.重建的太白山自然保护区南北坡7月NDVI变化序列存在60年左右的准周期变化.We used the correlation analysis of Larix chinensis tree-ring width chronologies,meteorological data as well as regional NDVI data to reconstruct the NDVI sequence variation of the north and south aspects of Taibai Mountain Nature Reserve in the recent 172 years. The results showed that the NDVI variation of Taibai Mountain Nature Reserve was consistent with plant growth dynamics. Hydrothermal condition in growing season was the dominant factor controlling NDVI changes.Tree-ring width was significantly positively correlated with NDVI in growing season. The strongest correlation occurred in July. Thus,we used the long time series of tree ring width index in July to reconstruct the regional historical period variation of NDVI sequence. The results demonstrated that historical changes of July NDVI sequence existed five dense periods and five sparse periods. Further analysis indicated that these periods corresponded with the climate change trends and drought events. The reconstructed July NDVI sequence of both northern and southern slopes of Taibai Mountain Nature Reserve highlighted the existence of quasi periodic variation of 60 years.

关 键 词：太白红杉 树轮宽度 NDVI 重建 气候变化 

分 类 号：S718.5[农业科学—林学]