文献类型：期刊文献

中文题名：金沙江流域不同海拔处云南松生态弹性及生长衰退过程

英文题名：Ecological Resilience and Growth Degradation of Pinus yunnanensis at Different Altitudes in Jinsha River Basin

作者：申佳艳[1,2] 李帅锋[1,2] 黄小波[1,2] 王绍武[3] 苏建荣[1,2]

第一作者：申佳艳

通信作者：Su, Jianrong

机构：[1]中国林业科学研究院资源昆虫研究所,昆明650224;[2]国家林业和草原局云南普洱森林生态系统国家定位观测研究站,普洱665000;[3]云南省永仁县林业和草原局,永仁651400

年份：2020

卷号：56

期号：6

起止页码：1-11

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20203108995255);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：中国林业科学研究院中央级公益性科研院所基本科研业务费专项(CAFYBB2017ZX002);云南省科技创新人才计划项目(2018HC013)。

语种：中文

中文关键词：云南松;年轮;海拔;生态弹性;生长衰退

外文关键词：Pinus yunnanensis;annual rings;altitudes;ecological resilience;growth degradation

分类号：S716.5

摘要：【目的】研究影响金沙江流域云南松生长的关键气候因子及不同海拔处云南松的生态弹性和生长衰退历史,为预测未来极端干扰事件对云南松生长动态的影响提供依据,为该区森林保护提供理论支撑。【方法】用生长锥钻取金沙江流域永仁县不同海拔处云南松树轮样芯,建立不同海拔树轮年表。利用树木径向生长变化百分率研究云南松生长衰退历史,用抵抗力和恢复力指标判断云南松的生态弹性,用响应分析和冗余分析方法研究不同海拔云南松生长与气候因子的关系。【结果】限制云南松径向生长的主要气候因子在低海拔区(1845 m)和中海拔区(2340 m)为生长季初期3—5月的月平均气温、降水量、干旱强度以及生长旺季的降水量及干旱强度,在高海拔区(2740 m)为生长季初期的干旱强度及生长旺季7月的平均气温;过去近150年中,研究区域云南松在1884—1886、1897—1900、1903—1906、1947—1949和2009—2011年间发生了生长衰退;相同时段的径向生长衰退现象在低海拔区域最明显,高海拔区次之,中海拔区较弱;不同海拔的云南松对相同年份极端干旱事件的生态弹性不同,抵抗力表现为中海拔>高海拔>低海拔,恢复力表现为低海拔>高海拔>中海拔;随年份后延,低海拔区云南松应对极端干旱事件的抵抗力在增强,恢复力在下降,中海拔区云南松的抵抗力稳定,恢复力在2012年极端干旱事件时增强,高海拔区云南松的抵抗力和恢复力在研究期内稳定。【结论】接近云南松林分布气候界限环境的树木更易发生径向生长衰退,位于水热条件适宜环境下的云南松抵抗极端事件干扰的能力更强,接近云南松林生长极限环境的树木受极端事件干扰后的恢复能力更强。
【Objective】The relationship between radial growth of Pinus yunnanensis and climatic factors and growth dynamics under the extreme drought events at different altitudes were studied to explore the ecological resilience and growth degradation history of P.yunnanensis,which could provide a basis for predicting the future effects of extreme disturbance on the growth dynamics of P.yunnanensis and provide theoretical support to forest protection in this area.【Method】Increment cores of P.yunnanensis at different altitudes in Yongren County,Jinsha River basin were collected by increment borer and established chronologies.Percentage changes of radial growth were used to evaluate the growth degradation.Resistance and resilience were used to assess the ecological resilience of P.yunnanensis.Response analysis and redundancy analysis were used to study the relationship between growth and climate factors of P.yunnanensis at different altitudes.【Result】The main limiting factors for the radial growth of P.yunnanensis at low(1845 m)and medium(2340 m)altitudes are the monthly mean air temperature,precipitation and drought intensity of initial growing season from March to May,and the monthly precipitation and drought intensity of growing season from June to August.Monthly air temperature of July during growing season and drought intensity of the initial growing season are the main limiting factors for the radial growth of P.yunnanensis at high altitude(2740 m);In the past 150 years,growth of P.yunnanensis degraded during the period of 1884-1886,1897-1900,1903-1906,1947-1949,and 2009-2011.The radial growth degradation of P.yunnanensis was most obvious in low-altitude area,followed by high-altitude area,and the degradation in the middle-altitude area was weaker.The ecological resilience of P.yunnanensis to the same extreme drought events varies among different altitudes.The drought resistance of P.yunnanensis is in an order of medium altitude>high-altitude>low-altitude.The resilience to extreme drought is just in an opposite order.With the increase of age,the drought resistance has enhanced at low-altitudes,while the resilience has weakened.The resistance of P.yunnanensis at the middle-altitudes is stable,the resistance and resilience at the high-altitudes are stable.【Conclusion】Trees growing in the marginal distribution of P.yunnanensis are more prone to growth degradation,trees under favorable hydrothermal conditions are more resistant to the interference of extreme events,and trees near the limit environments of P.yunnanensis are more resilient to disturbances.