生态学报2023，Vol.43Issue(24)：10263-10273,11.DOI:10.20103/j.stxb.202303300616
升温突变对川西不同坡向和海拔岷江冷杉径向生长的影响
Effects of abrupt warming on radial growth of Minjiang fir at different slope aspects and elevations in western Sichuan,China
摘要
Abstract
As important topographic factors,slope aspect and elevation determine the heat and water distribution in forest land conditions.In order to reveal the climatic factors that restrict the radial growth of Minjiang fir(Abies fargesii var.faxoniana)before and after the abrupt warming in western Sichuan and the response patterns in slope aspect and elevation,twelve standard chronologies of Minjiang fir were constructed on four slope aspects(NE,N,NW,and W)and three elevation gradients(≥3650 m)by using dendroecology technology.Using Pearson correlation analysis and regression analysis,we analyzed the changes in the main climate factors limiting the radial growth of Minjiang fir before and after the warming of the 1980s and the trend of radial growth after the warming.Before the warming in 1980,the growth of Minjiang fir was restricted by the lowest temperature and precipitation in the growing season(July)and the highest and average temperature in the winter of the previous year(October-November),while the increase of temperature in spring(March)and more precipitation in the growing season(May)were not conducive to the growth of Minjiang fir.After warming,the radial growth of Minjiang fir was positively correlated with temperature in most months at the middle elevation of the NE slope and the low elevation of the W slope,and the treelines of four slope aspects.All the radial growth of Minjiang fir at the above sample sites showed increasing increments.Before the warming in 1980,the climatic factors restricting the radial growth of Minjiang fir at different sampling sites were consistent,i.e.,the slope aspects and elevations had little interference and influence on the correlation between the radial growth and climate data.The warming promoted the growth of Minjiang fir in the treelines of all slope aspects.The radial growth of Minjiang fir on the partial-sunny slope aspect showed positive feedback to the warming at a more extensive altitude range.The study is of great significance for predicting the growth and distribution of Minjiang fir in different slopes of western Sichuan under the background of future climate change.关键词
岷江冷杉/坡向/海拔/升温突变/径向生长Key words
Abies fargesii var.faxoniana/slope aspect/elevation/abrupt warming/radial growth引用本文复制引用
薛盼盼,缪宁,罗建琼,张远东,毛康珊..升温突变对川西不同坡向和海拔岷江冷杉径向生长的影响[J].生态学报,2023,43(24):10263-10273,11.基金项目
国家自然科学基金项目(32271646,U20A2080) （32271646,U20A2080）
