YunForest: Growth and physiological responses of forests to climate change along latitudinal and altitudinal gradients in Southwest China (Yunnan Province)

云森林：中国西南地区（云南省）纬度和海拔梯度森林的生长和生理响应对气候变化的影响

基本信息

批准号：
410365304
负责人：
Professor Dr. Achim Bräuning
金额：
--
依托单位：
Institut für Geographie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2019
资助国家：
德国
起止时间：
2018-12-31 至 2023-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/410365304?language=en
关键词：
YunForest Growth physiological responses forests

项目摘要

During the recent decades, the topographically complex province of Yunnan in southwest China experienced substantial trends of increasing temperatures, accompanied by an increasing number of precipitation failures. This may challenge the sustainability of forest ecosystem services like carbon sequestration and biodiversity conservation. The project YunForest evaluates the effects of a changing climate to the adaptation of natural and anthropogenic forest ecosystems in three elevation transects along a south-north climatic gradient in the tropical, subtropical and temperate climate zones of Yunnan. In an interdisciplinary study, we will use different wood anatomical parameters/features and tree physiological information derived from analyses of stable oxygen and carbon isotopes in tree-ring cellulose to quantify forest growth and tree species’ response to changes in regional hydroclimate. Multicentennial climate variability along the Mekong river system will be reconstructed using a multi-tree-ring parameter approach. Extreme precipitation events will be analyzed along the studied gradients by analyzing their oxygen isotope composition and calculating the origin of the air masses by trajectory analyses. This will allow modelling of stable oxygen fractionation along atmosphere travel pathways and linkage to intra-annual distribution of oxygen isotopes in tree rings.

在最近的几十年中，中西部西南部的云南的地形复杂省经历了较高的温度趋势，这是由于降水量越来越多的降水量失败而实现的。这可能会挑战森林生态系统服务（如碳封存和生物多样性保护）的可持续性。该项目Yunforest评估了气候变化对自然和人为森林生态系统适应的影响，在云南的热带，亚热带和温度气候区域中的三个海拔样本中，沿着三个海拔样本沿三个海拔样本。在一项跨学科研究中，我们将使用不同的木材解剖参数/特征和树木生理信息，这些参数来自对树环纤维素中稳定的氧气和碳同位素的分析，以量化森林生长和树种对区域氢化气候变化的反应。湄公河系统沿线的多个世纪攀岩变异性将使用多树环参数方法重建。通过分析其氧同位素组成并通过轨迹分析来计算空气质量的起源，将沿Studiod梯度分析极端降水事件。这将允许建模沿大气行进途径的稳定氧分子，并与树环中氧同位素的年度分布联系。