不同生境下圆柏径向生长的气候响应  被引量:8

Response of radial growth of Juniperus seravschanica to climate changes in different environmental conditions

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作  者:苟晓霞 张同文[1] 喻树龙[1] 张瑞波[1] 姜盛夏 郭玉琳 GOU Xiao-xia;ZHANG Tong-wen;YU Shu-long;ZHANG Rui-bo;JIANG Sheng-xia;GUO Yu-lin(Institute of Desert Meteorology,China Meteorological Administration,Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration,Key Laboratory of Tree-ring Ecology of Xinjiang Uigur Autonomous Region,Urumqi 830002,China;Aliay Prefecture Meteorological Bureau of Xinjiang,Kitaj 836500,Xinjiang,China;College of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区:[1]中国气象局乌鲁木齐沙漠气象研究所,中国气象局树木年轮理化研究重点实验室,新疆树木年轮生态实验室,乌鲁木齐830002 [2]新疆阿勒泰地区气象局,新疆阿勒泰836500 [3]成都信息工程大学大气科学学院,成都610225

出  处:《生态学杂志》2021年第6期1574-1588,共15页Chinese Journal of Ecology

基  金:中央级公益性科研院所基本科研业务费(IDM2018004);自治区重点实验室开放课题(2018D04028);国家自然科学基金项目(41975095);天山青年计划-杰出青年科技人才(2019Q007);第二次青藏高原综合科学考察研究子专题(2019QZKK010206)资助。

摘  要:利用苦盏山区3个采样点的泽拉夫尚圆柏(Juniperus seravschanica)树轮样本建立树轮宽度年表,运用树木年轮学方法分析不同生境下圆柏径向生长对气候变化的响应。结果表明:不同坡向和海拔的圆柏径向生长对气温和降水响应差异较大;北坡海拔2000 m处圆柏径向生长主要受当年生长季降水的控制,同海拔南坡的圆柏径向生长主要受到上年和当年生长季气温的制约,而南坡低海拔处圆柏生长主要受当年生长季末期气温影响;u检验和滑动相关分析结果显示,生长在不同区域的圆柏径向生长对气候要素的响应关系和响应时段存在差异;其中高海拔北坡的树轮宽度年表与当年5—6月的降水正相关逐渐增强,高海拔南坡的圆柏径向生长对上年5月气温的正响应和上年12月气温的负响应有所加强,而低海拔南坡和高海拔北坡的圆柏径向生长对生长季末期降水负响应呈现增强的趋势。In this study,tree ring samples of Juniperus seravschanica were collected from three sites in the Kuramenian Mountains,which were used to develop three tree-ring width chronologies. Results of climate-growth response analysis showed that the radial growth of trees showed different responses to temperature and precipitation at different slope directions and at different altitudes. The radial growth of trees at high altitude( 2000 m) was mainly affected by precipitation in the current growing season on the northern slope,and was mainly limited by temperature in the previous and current growing seasons on the southern slope. Temperature at the end of the current growing season significantly affected the radial growth of J. seravschanica on the southern slope at low altitude( 1600 m). Results of moving correlation analysis and u tests revealed differences in the relationships between the radial growth of J. seravschanica and climate factors in different sites. The response period of the radial growth of J. seravschanica differed among different sites due to climatic variations. The positive correlation between tree-ring width chronology and precipitation in May-June in the current season was slightly stronger at high altitude on the northern slope. The radial growth of J. seravschanica was mainly affected by temperature at high altitude on the southern slope,which reflected a strong positive correlation between the radial growth of trees and temperature in the previous May and a strong negative correlation between the radial growth of trees and temperature in the previous December. The radial growth of trees at low altitude on the southern slope and at high altitude on the northern slope showed increasingly negative response to precipitation at the end of the growing season.

关 键 词:泽拉夫尚圆柏 树轮宽度年表 气候要素 响应分析 

分 类 号:S791.44[农业科学—林木遗传育种]

 

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