普达措国家公园2个针叶树种径向生长对温度和降水的响应

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 普达措国家公园2个针叶树种径向生长对温度和降水的响应 DOI: 10.5846/stxb201710091794 作者: 作者单位: 西南林业大学,西南林业大学,西南林业大学,西南林业大学,云南碧塔海省级自然保护区管理局,云南碧塔海省级自然保护区管理局,云南碧塔海省级自然保护区管理局,西南林业大学 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目（31600395）；云南省教育厅科学研究基金项目（2015Z136，2017YJS094）；云南省高原湿地科学创新团队项目（2012HC007）；西南林业大学科技创新基金项目（C17139） Response of radial growth of two conifers to temperature and precipitation in Potatso National Park, Southwest China Author: Affiliation: Southwest Forestry University,Southwest Forestry University,Southwest Forestry University,Southwest Forestry University,,,,Southwest Forestry University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:基于树轮年代学方法，利用普达措国家公园海拔上、下限丽江云杉（Picea likiangensis）和长苞冷杉（Abies georgei）树轮宽度资料，构建差值年表并分析其与温度和降水的关系，阐明影响该区域2个主要针叶树种径向生长的主要气候要素。结果表明：（1）海拔下限丽江云杉径向生长同时受到温度和降水的影响：与上年11月平均温、当年生长季后期（9-10月）平均温和上年7月降水呈显著正相关；（2）海拔上限丽江云杉径向生长只受温度影响，与上年生长季后期平均温呈显著负相关，与当年生长季盛期（6-8月）平均温呈显著正相关；（3）长苞冷杉径向生长只与温度表现出显著相关性，海拔下限的生长与上年11月平均温呈显著正相关，海拔上限的生长与当年生长季盛期平均温呈显著正相关。结果可为气候变化对滇西北高原树木生长影响研究提供参考，为滇西北高原森林生态系统管理与保护提供理论依据。 Abstract:The Hengduan Mountain is located to the southeastern margin of the Qinghai-Tibet Plateau, which is sensitive to climate change and a hot spot for tree-ring research; it has rich biodiversity and significant climate changes, so it plays an important role in climate change research. Up to now, tree-ring research in this area concentrated on the upper distributional limits, however the systematic study of both the upper and lower distributional limits was out of focus. Based on the dendrochronological method, we established the residual chronologies of Picea likiangensis and Abies georgei at their upper and lower distributional limits by using tree-ring width data, and studied the relationship between the residual chronologies, temperature and precipitation. The study can identify the key climatic factors that affect the radial growth of two conifers. The results showed that:(1) The radial growth of Picea likiangensis was affected by both temperature and precipitation at its lower limits; there were significant and positive correlations between its growth and November mean temperature (Tmean) in the previous year, Tmean of post growing season (September-October) in the current year and July precipitation in previous year. (2) The radial growth of Picea likiangensis was only affected by temperature at its upper limits, by showing a negative correlation with Tmean of post growing season in the previous year, and a significantly positive correlation with Tmean of growing season (June-August) in the current year. (3) The radial growth of Abies georgei was only correlated with temperature. November Tmean in the previous year and growing season Tmean in the current year positively affected its growth at lower and upper distributional limits respectively. The results of this paper can offer a reference for the study in effects of climate change on tree growth in Northwest Yunnan Plateau, and provide a theoretical basis for the management and protection of forest ecosystems in the area. 参考文献 相似文献 引证文献