摘要: 目的气候因子影响树木生长发育，对树木径向生长与气候因子之间的关系进行分析，以探究长白山地区云冷杉针阔混交林森林生态系统对气候变化的响应，为该地区天然林经营管理提供科学依据、�/sec> 方法本研究于2019年在吉林省汪清县云冷杉针阔混交林中对常见针叶树臭冷杉、鱼鳞云杉和红松进行样芯的采集，用树木年轮学方法建立标准年表，进而分析比较不同树种生长与气候因子的关系、�/sec> 结果该地区树木标准年表的平均敏感度和信噪比分别为0.16 ~ 0.27�?.14 ~ 19.98，其中臭冷杉包含更多的气候信息，其平均敏感度、标准差、信噪比和样本总体代表性等统计量均高于鱼鳞云杉和红松。上�?月平均气温及上年、当�?月最低气温与臭冷杉、鱼鳞云杉和红松径向生长均呈显著正相关（ P< 0.05），这表明同一区域不同树种径向生长对气候的响应具有一定的相似性�?种树种径向生长对气候变化的响应也存在差异，臭冷杉径向生长受气温和降水的共同作用，鱼鳞云杉和红松径向生长主要受气温限制。升温突变（1985年）后，臭冷杉、鱼鳞云杉和红松径向生长与气温相关性增强但与降水量相关性减弱，且升温后树木径向生长有显著上升趋势、�/sec> 结论不同树种径向生长对气候变化的响应既有共性又存在差异，目前升温可能仍在臭冷杉、鱼鳞云杉和红松径向生长的临界阈值内，促进其径向生长、�/sec>

关键诌�
• 长白屰�/a> /
• 树轮/
• 气候变匕�/a> /
• 生长−气候关糺�/a> /
• 径向生长

Abstract: ObjectiveClimate factors affect tree growth and development, and the relationship between tree radial growth and climate factors was analyzed to explore the response of spruce-fir coniferous and broadleaved mixed forest ecosystem to climate change in Changbai Mountain of northeastern China, so as to provide scientific basis for natural forest management in this area. MethodIn this study, we used dendrochronological techniques to sample tree-ring cores of Abies nephrolepis, Picea jezoensisand Pinus koraiensis, which were the common tree species in the spruce-fir mixed stand in Wangqing County, Jilin Province of northeastern China in 2019. We developed tree-ring width chronologies of three conifers and conducted growth-climate relationship analyses to reveal the influence of climate factors on tree radial growth. ResultThe mean sensitivity and signal-to-noise ratio of the three tree species were 0.16�?.27 and 6.14�?9.98. Among them, A. nephrolepiscontained more climate information, and its average sensitivity, standard deviation, signal-to-noise ratio, and overall sample representativeness were all higher than those of P. jezoensisand P. koraiensis. The average temperature in September of the previous year and the minimum temperature in July of the previous year and the current year were significantly positively correlated with the radial growth of three tree species ( P< 0.05), indicating that climate had a similar effect on the ring width growth in the same area. The responses had a certain similarity. However, the response of radial growth of the three conifers to climate change was different too. The radial growth of A. nephrolepiswas affected by the combined effect of temperature and precipitation, while the radial growth of P. jezoensisand P. koraiensiswas mainly restricted by temperature. After abrupt temperature rising (1985), the radial growth of the three tree species had an enhanced correlation with temperature but a weakened correlation with precipitation, and the radial growth of trees increased significantly. ConclusionThe response of radial growth of different tree species to climate change has both similarities and differences, The increase in temperature may still be within the critical threshold of radial growth of A. nephrolepis, P. jezoensisand P. koraiensis, so climate warming promotes their radial growth.

Key words:
• Changbai Mountain/
• tree ring/
• climate change/
• growth-climate relationship/
• radial growth

�?nbsp; 33种常见树种的标准年表和样本量

Figure 3.Standard chronology and sample size of three common tree species

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 1研究�?958�?018年气象数�?/p>

T.平均气温：�i>T_min.最低气温；T_max.最高气温；SPEI.标准化降水蒸散指数、�i>T, mean temperature;T_min, minimum temperature;T_max, maximum temperature; SPEI, standardized precipitation evapotranspiration index.

Figure 1.Meteorological data of research area from 1958 to 2018

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 21958�?018年年均气� Mann-Kendall检验结枛�/p>

UF_k.正常的统计值时间序� ；UB_k.逆序的统计值时间序列。UF_k, normal statistical time sequence; UB_k, inverted statistical time sequence.

Figure 2.Mann-Kendall test results of average annual temperature from 1958 to 2018

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 4标准年表与月最低气温、平均气温和最高气温的相关系数

p.上年；c.当年。下同。p, previous year; c, current year. The same below.

Figure 4.Correlation coefficients of the standard chronology with monthly minimum temperature, mean temperature and maximum temperature

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 5标准年表与月降水量、SPEI的相关系�?/p>

Figure 5.Correlation coefficients of standard chronology with monthly precipitation and SPEI

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 6升温突变前后3种常见树种标准年表与气候因子的相关分析

*表示的显著相关（P< 0.05）�? means significant correlation (P< 0.05).

Figure 6.Correlation analysis between the standard chronology of three common tree species and climate factors before and after the abrupt warming change

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 73种常见树种与气候因子的滑动相关分析

Figure 7.Moving correlation analysis of three common tree species and climate factors

下载: 全尺寸图牆�/a> 幻灯牆�/a>

�?nbsp; 1标准年表的统计特征及公共区间分析

Table 1.Statistical characteristics and common interval analysis of the standard chronology

统计特征 Statistic characteristics	臭冷�Abies nephrolepis	鱼鳞云杉Picea jezoensis	红松Pinus koraiensis
时间跨度 Time span	1900�?018	1926�?018	1898�?018
平均� Mean value	0.93	0.96	0.95
平均敏感� Mean sensitivity (SM)	0.27	0.16	0.22
标准� Standard deviation (SD)	0.40	0.38	0.30
一阶自相关系数 First-order autocorrelation coefficient (AC)	0.81	0.86	0.81
公共区间 Common interval	1969�?011	1969�?011	1959�?013
信噪� Signal-to-noise ratio (RSN)	19.98	6.14	11.21
样本间相关系� Correlation coefficient between samples (Rbar)	0.40	0.31	0.32
样本总体代表� Sample population representativeness (SEP)	0.95	0.86	0.92

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