植物生态学报 ›› 2019, Vol. 43 ›› Issue (12): 1061-1078.DOI: 10.17521/cjpe.2019.0257

• 研究论文 • 上一篇    下一篇

吉林老白山鱼鳞云杉树轮蓝光强度和轮宽指数与气候响应关系随海拔变化的对比

苑丹阳1,2,朱良军1,2,张远东3,李宗善4,赵慧颖5,王晓春1,2,*()   

  1. 1 东北林业大学生态研究中心, 哈尔滨 150040
    2 东北林业大学森林生态系统可持续经营教育部重点实验室, 哈尔滨 150040
    3 中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091
    4 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085
    5 黑龙江省气象科学研究所, 哈尔滨 150030
  • 收稿日期:2019-09-27 接受日期:2019-12-05 出版日期:2019-12-20 发布日期:2020-01-19
  • 通讯作者: 王晓春 ORCID:0000-0002-8897-5077
  • 基金资助:
    国家自然科学基金(41877426);中央高校基本科研业务费专项资金(2572017DG02);中央高校基本科研业务费专项资金(2572019CP15)

Comparison of elevational changes in relationships of blue intensity and ring width index in Picea jezoensis with climatic responses in Laobai Mountain of Jilin, China

YUAN Dan-Yang1,2,ZHU Liang-Jun1,2,ZHANG Yuan-Dong3,LI Zong-Shan4,ZHAO Hui-Ying5,WANG Xiao-Chun1,2,*()   

  1. 1 Center for Ecological Research, Northeast Forestry University, Harbin 150040, China
    2 Key Laboratory of Sustainable Forest Ecosystem Management-?Ministry of Education, Northeast Forestry University, Harbin 150040, China
    3 Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry/Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Beijing 100091, China
    4 State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
    5 Heilongjiang Institute of Meteorological Science, Harbin 150030, China
  • Received:2019-09-27 Accepted:2019-12-05 Online:2019-12-20 Published:2020-01-19
  • Contact: WANG Xiao-Chun ORCID:0000-0002-8897-5077
  • Supported by:
    Supported by the National Natural Science Foundation of China(41877426);Special Funds for Fundamental Science Research Operating Expenses of Central Universities(2572017DG02);Special Funds for Fundamental Science Research Operating Expenses of Central Universities(2572019CP15)

摘要:

树轮数据是晚全新世古气候研究中最重要的代用指标。树轮参数各具优缺点, 蓝光强度(BI)是一种获取成本低廉的最大晚材密度(MXD)的光学替代参数, 其蓝色光反射率或强度最小值(256-BI)与相应的MXD值高度相关, 被很多的学者认为是树轮气候学研究中一个具有重要潜能的新兴参数。该研究以吉林老白山3个海拔(900、1 200和1 500 m)的鱼鳞云杉(Picea jezoensis)为例, 分析鱼鳞云杉的BI及轮宽指数(RWI)与气候因子的响应差异, 以期为BI参数在树轮气候学的进一步应用提供参考。结果表明: 不同海拔鱼鳞云杉BIRWI对气候的响应趋势基本一致。BI与温度主要呈正相关关系, 而RWI与温度主要呈负相关关系, 其中BI与当年夏季及生长季最高温度显著正相关, 而RWI (低、中海拔)与全年平均气温、当年生长季和全年最低温度显著负相关。BI与当年夏季标准化降水蒸散指数(SPEI)显著负相关, RWI与夏季SPEI负相关关系较弱或为正相关; BIRWI几乎相反的生长-气候关系可能是早、晚材权衡关系的体现。研究区域鱼鳞云杉的BI参数可能与年轮宽度记录不同的气候信号, 在空间尺度上对于当年夏季降水、最高温度以及SPEI的响应好于传统宽度指标。BI与主要气候因子相关关系的时间稳定性好于RWI, 因此, BI在树轮气候学的研究中具有一定的应用潜能。

关键词: 树木年轮, 蓝光强度, 鱼鳞云杉, 海拔, 气候响应

Abstract:

Aims We aim to compare the climatic representativeness of blue intensity (BI) and ring width index (RWI) in Picea jezoensis, and to provide guidance for the further application of BI parameters in dendrochronology.
Methods A total of 120 tree-ring cores were extracted from P. jezoensis trees in the Laobai Mountain of Jilin Province. Using the methods of the growth-climate response function analysis and moving correlation analysis, the differences in the responses of BI and RWI to climate change in P. jezoensis along an elevational gradient (namely 900, 1 200 and 1 500 m) were investigated.
Important findings The BI (or RWI) in P. jezoensis trees at the three elevations had similar responses to climate. BI was predominantly and positively correlated with temperature, while RWI was predominantly and negatively correlated with temperature. BI was positively correlated with the maximum temperature in summer and growing season. RWI at the low or medium elevations was significantly and negatively correlated with the annual minimum and mean temperatures and the minimum temperature in growing season. BI was negatively correlated with the SPEI in summer, while RWI was weakly or positively correlated with SPEI in summer. This almost inverse growth-climate relationships by BI and RWI may reflect the trade-off between earlywood and latewood. BI and RWI in P. jezoensis in the study area may infer different climate signals. On the spatial scale, the responses of BI to summer precipitation, maximum temperature and SPEI were better than the traditional RWI. The temporal stability of the correlation of BI with main climatic factors was better than that of RWI. Therefore, BI has some potential application in studies of dendroclimatology.

Key words: tree rings, blue intensity, Picea jezoensis, elevation, climate response