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侧柏年轮宽度和年轮密度对气候变化的响应 总被引：10，自引：0，他引：10
通过响应函数分析和多元回归分析等年轮气候学方法,研究北京地区侧柏年轮宽度和年轮密度对气候变化的响应.结果表明:侧柏年轮宽度序列和年轮密度序列对气候变化相当敏感.前一年10月到当年9月的月平均气温和月降水量的响应函数模型可解释年轮宽度变化的58.45%,年轮密度变化的77.81%.夏季降水对侧柏年轮宽度有显著的正效应,而对年轮密度则表现出负效应.与降水的影响相反,夏季气温对侧柏年轮宽度表现出显著的负效应,对年轮密度表现出显著的正效应.其中,当年7月的气温和降水对侧柏年轮宽度和年轮密度的作用尤为显著.说明侧柏的年轮宽度和年轮密度均可用于年轮气候学研究,且年轮密度包含的信息量高于年轮宽度. 相似文献
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在气候暖干化趋势下,进行森林经营树种对气候变化的响应研究,有助于适宜的经营技术构建以及森林经营对气候变化的应对。选取围场县龙头山林场天然华北落叶松,建立年轮宽度年表,应用相关分析、Mann-Kendall检验、逐步回归等方法,研究华北落叶松径向生长对气候变化的响应。结果表明:1)近60年来,本地区气温显著升高,在1980年发生升高突变;降水量有减少趋势,但变化趋势不明显。2)华北落叶松径向生长受气温与降水的双重影响,与多数气温因子呈显著负相关,与多数降水因子呈显著正相关,当年3,4月份降水是树木径向生长的重要限制因素。3)生长季极端高温与径向生长呈显著负相关,湿润指数与径向生长呈极显著正相关。4)利用当年生长季平均温度及3,4月份降水量和湿润指数模拟华北落叶松径向生长,发现在暖干化趋势下,研究区华北落叶松的生长将呈现减缓趋势。 相似文献
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马尾松年轮宽度和木材基本密度的种源变异及早期选择 总被引：2，自引：1，他引：1
针对浙江省淳安县姥山林场的24年生49个产地马尾松种源试验林,采集植株胸高处木芯,分析种源年轮宽度和木材基本密度的年龄效应。结果表明:除近髓部1～5轮年轮段的木材基本密度外,其他年龄段的年轮宽度和木材基本密度皆存在显著的种源差异,进一步说明通过种源选择可实现木材生产力和木材基本密度的遗传改良。不同年轮段木材基本密度的种源变异相对稳定,而年轮宽度的种源变异则易受环境的影响,幼龄材年轮宽度的种源变异较小,仅为成熟材的63.29%。来自不同种源区的种源年轮宽度的径向变异规律相似,皆表现出先增后减的变化趋势,在6～10轮达到最大值;年轮木材基本密度径向变化规律则与年轮宽度不同,表现为随年龄增长先增加后逐渐稳定的S型变化趋势,并据此筛选出广西横县、恭城、忻城,广东乳源和福建南靖5个木材基本密度径向均匀性高的纸浆材优良种源。不同年轮段年轮宽度和木材基本密度的相关分析显示,约在8年生选择径向生长快的种源会明显地降低其木材基本密度。基于性状早晚相关分析,认为可在7年生时先淘汰生长较差的种源,在12年生再开展种源生长和木材基本密度的联合选择。 相似文献
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板栗木材密度和直径生长的研究 总被引：6，自引：4，他引：2
本文通过对板栗木材密度与年轮宽度的研究表明,板栗木材年轮宽度较窄,为０．２１ｃｍ,近髓心宽度较大,后期呈较平衡的下降趋势;年轮密度从髓心向外一直呈逐渐下降趋势;平均木密度为０．６１６４ｇ／ｃｍ＾３,最大密度为０．７７８５ｇ／ｃｍ＾３,最小密度为０．３７７４ｇ／ｃｍ＾２,早材密度０．４８３５ｇ／ｃｍ＾３,晚材密度０．６８２１ｇ／ｃｍ＾２,变异幅度０．４３９,密度梯度２３．６９７８,木材面向密度为０． 相似文献
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《中南林业科技大学学报(自然科学版)》2016,(11)
为了研究树木生长对气候变化的响应,选取长白山北坡3个海拔高度建立了臭冷杉Abies nephrolepis的年轮差值年表。通过年表特征及响应函数分析,探讨不同海拔臭冷杉径向生长对气候变化的响应。结果表明,温度是影响海拔分布上限(1 760 m)臭冷杉生长的主要影响因子,年轮宽度指数与上年9月和当年5月的平均温呈显著正相关,与降水没有显著关系;在中海拔(1 250 m),年轮宽度指数与温度和降水都没有呈现出显著相关关系;在海拔分布下限(780 m),降水是主要的影响因子,年轮宽度指数与上年9月和10月的降水量呈显著正相关,与温度没有达到显著相关。未来气候变化有利于臭冷杉的径向生长,有利于长白山暗针叶林生产力的增加。 相似文献
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[目的]基于色季拉山地区特有树种西藏红杉年轮样芯,研究西藏红杉径向生长对气温和降水量的波动响应。[方法]利用树木年代学的方法,结合TASP-Win及ARSTAN程序建立标准年表,采用Pearson及bootstrap的计算方式将年轮宽度指数与1961—2020年气温及降水分别进行相关分析。[结果]径向生长在气温波动前后存在较大的差异。在气温波动前西藏红杉与前一年8月,当年1月及6月平均气温呈正相关（P<0.05）,与前一年9—10月及12月平均降水呈正相关,与前一年8月降水呈负相关,与1月至12月的相对湿度呈显著正相关（P<0.01）。在气温发生波动后,与当年3—12月平均气温呈负相关,与前一年8月及当年6月降水为显著正相关。[结论]藏东南地区的气候条件极为特殊,气候的波动导致水热条件发生变化是限制西藏红杉径向生长的主要原因,在非生长季,气温短暂的变化对树木径向生长同样有着显著的影响。 相似文献
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为了解青藏高原东缘四川红杉径向生长对气候变化的响应规律,于四川马尔康海拔3940 m采集四川红杉木年轮样芯,建立标准年表,对年轮宽度指数与前一年1月至当年12月的月平均最高温、最低温、平均温和降水量进行了相关分析。结果表明：四川红杉径向生长与当年9月降水量呈显著正相关,与当年12月份的最低气温呈显著负相关,其生长季降水增多可能有利于高海拔四川红杉的生长。 相似文献
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[目的]通过对不同地理种源杉木α纤维素中的稳定碳同位素(δ^13C)与气候因子的相关性分析,筛选出影响杉木树轮δ^13C的主导气候因子,解释不同种源差异性响应,为种源层面上区域杉木的培育提供理论参考。[方法]以广西柳州的杉木试验林场的30个种源为研究材料,提取并测量α纤维素中δ^13C,利用相关分析和逐步回归分析方法,对杉木树轮δ^13C与当年、前1年、前2年的降水、平均温度、最低气温、最高气温、平均相对湿度、最小相对湿度、日照时数及湿润度指数进行分析。[结果]不同种源杉木(1987-2013)树轮δ^13C值的变幅为-20.997‰^-25.910‰,表现出较强的一阶自相关,相关系数为0.181~0.866。大部分种源杉木树轮的δ^13C与平均温度、最高气温、最低气温呈显著正相关(p<0.05),与日照时数呈不显著正相关,与平均相对湿度、最小相对湿度呈极显著负相关(p<0.01),而与降水及湿润度指数的相关性不统一。逐步回归分析结果发现,30个杉木种源中有26个种源与当年最小相对湿度呈线性关系。[结论]最小相对湿度是影响不同种源杉木树轮α纤维素中δ^13C的主导气候因子,而对降水的依赖性很小。杉木不同种源树轮δ^13C对气候因子的响应存在明显的滞后效应。研究有效的填补了种源层面上树轮稳定碳同位素对气候响应研究的不足,也为杉木培育及经营管理提供了参考。 相似文献
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There has been a decline in tree growth since the operation of factories atPinus thunbergii forests around a petrochemical industrial complex in Korea. This study was carried out to investigate the effects of air
pollution on tree ring width and ring density ofPinus thunbergii. Soft X-ray densitometrical method was used. Decline of ring width was the highest during 3 years immediately after the operation
of factories. The percentage of decrease was almost bigger immediately after operation as compared with before. Maximum density
(MAXD), and the difference (DD) between maximum density and minimum density (MIND) generally decreased since operation of
factories, while minimum density increased in the beginning of operation of factories. There was a significant correlation
between ring width and high temperature, and precipitation in the beginning of growing season, respectively. There was also
a negative correlation between annual mean concentration of SO2 and ring width at 5% level (r=−0.627*). It is suggested that the decline of ring width after operation of factories was due to compound factors of air pollution
and climate. The effect of other factors should be still more studied.
A part of this paper was presented at the International Workshop on Asian and Pacific Dendrochronology on March 4–9, 1995
in Tsukuba (Forestry and Forest Products Research Institute), Japan. 相似文献
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Jin-Mei Xu Fu-Cheng Bao Jian-Xiong Lv Rong-Feng Huang You-Ke Zhao Evans Robert 《中国林学(英文版)》2013,15(4):310-319
In order to investigate the response to climate changes in radial growth of Picea crassifolia at the lower tree line in the middle Qilian mountains in northwestern China, relationships of standardized chronologies of annua ring, earlywood and latewood widths with mean monthly temperature and total monthly precipitation were analyzed by ways of correlation and pointer year analyses. The results show that annual ring, earlywood and latewood widths are significantly negatively correlated with mean monthly temperature in June and Juy. Annual ring and eadywooc widths are significantly and positively correlated with tOtal monthly precipitation in March, May and June and negatively correlated with total monthly precipitation in September. Latewood width is less sensitive to climate changes than the width of earlywood and insignificantly sensitive to precipitation. The results of pointer year analysis revealed that whet summer temperatures are higher than the mean summer temperature synchronization and the summer precipitatior lower than mean summer precipitation synchronization, narrow annual rings are formed. Wide annual rings are formec~ when summer temperatures are lower than the mean summer temperature synchronization and summer precipitation higher than mean summer precipitation synchronization. The results indicate that more precipitation in the spring and summer is helpful for radial growth while warmer summer restricts radial growth of P. crassifolia at the lower tree line in the middle Qilian mountains. 相似文献
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Tree-ring chronologies were developed fromAbies mariesii Masters andPicea jezoensis ssp.hondoensis (Mayr) P. Schmidt collected at different altitudes of Mt. Norikura, central Japan. The tree-ring parameters of ring width and maximum density were measured by soft X-ray densitometry. The measurement series were detrended by fitting a 33-year cubic smoothing spline and autoregressive model. The correlation between species and between sites showed different responses of the species to climate in terms of ring width and maximum density. The correlation coefficient between sites within a species was higher than that between species for a site in the ring width, and the coefficient between species for a site was higher in maximum density. The correlation coefficient between tree-ring chronology and monthly climate data set showed different responses of radial growth to climate. The different response was probably explained by the difference in the length of the growing season. High summer temperature increased the maximum density of the two species and the radial growth inAbies mariesii. Summer precipitation correlated negatively to maximum density, but it did not affect the ring width of either species. The climatic signals could be extracted from ring-width and maximum-density chronologies of both species. 相似文献
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Oberhuber W 《Tree physiology》2004,24(3):291-301
Radial growth variability and response to interannual climate variation of Cembran pine (Pinus cembra L.) were studied in the timberline ecotone on Mt. Patscherkofel (2246 m a.s.l.). The study area, which is in the inner alpine dry region of the Central Austrian Alps, is characterized by a continental climate with minimum precipitation in winter (about 150 mm during December-February) and frequent occurrence of warm dry winds (F?hn) in early spring. The hypothesis that spatial and temporal variability of radial growth is caused by site-related differences in sensitivity to winter stress (i.e., desiccation) was examined by applying dendroclimatological techniques. Ordination methods applied to tree ring time series revealed that spatial variability in radial growth is influenced by the local site factors elevation and slope aspect. Growth-climate relationships were explored using Pearson product-moment correlation coefficients and multiple regression analysis. Radial growth at the timberline was positively correlated with temperature in July and was also strongly correlated with mild temperatures in the previous autumn and high precipitation in winter (January-March). At the tree line, temperatures in the previous autumn and precipitation in late winter (March) also controlled radial growth, whereas July temperature was not significantly correlated with ring width. Because previous autumn temperature and winter precipitation were the main growth-determining factors at the timberline and the tree line, and both of these climate variables are known to influence susceptibility of trees to winter stress, the results support the working hypothesis. Analysis of climatic conditions in extreme growth years confirmed the high sensitivity of tree ring growth to precipitation in late winter (March) at the tree line plots. Furthermore, extent of growth reduction and release varied spatially and temporarily, with south- and west-facing stands showing a higher sensitivity to climate variation in the most recent decade (1990s) than the north-facing stand. This aspect-related change in sensitivity to climate may be associated with effects of climate warming on cambial activity. 相似文献
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【目的】华北落叶松是内蒙古大兴安岭南段主要的人工林树种,分析华北落叶松年轮宽度指数的变化以及与气象因子的相关性,以此判断华北落叶松人工林在大兴安岭南段地区的适应性,为可持续经营管理提供理论依据。【方法】赛罕乌拉是大兴安岭南段次生林的典型地段,并且是内蒙古最大的次生林区。在1986年种植的华北落叶松人工林区域内,按国际树木年轮库(ITRDB)的要求,2013年随机采集54棵华北落叶松108根树芯,其中死树14棵。运用树木年轮气候学方法,建立华北落叶松年轮宽度年表,利用相关函数分析1986-2013年的气温和降水气象因子与年表的相关性,揭示华北落叶松径向生长对气候响应规律。【结果】(1)华北落叶松径向生长与上一年5、7月的平均最高温和平均气温呈显著性负相关(P <0.05),与当年冬季11月的降水量具有显著性正相关(P <0.05),和其它月份也均成正相关但显著性不明显,表明华北落叶松主要受到冬季降水量的影响。(2)通过年轮与气象因子的响应分析得出,华北落叶松对气候的响应具有明显的"滞后性",具体表现为,干旱胁迫对当年树木的径向生长量影响不显著,对第2年树木的径向生长量影响显著。2006年发生极端干旱年,发生后的4年内华北落叶松发生死亡现象。【结论】大兴安岭南段华北落叶松人工林的径向生长主要受到当年冬季11月降水量的显著性影响。华北落叶松受到干旱胁迫时有明显的"滞后性",影响体现在第2年即形成窄轮。这可能意味着,随着未来干旱的加剧,冬季降水对华北落叶松的生长变得更加重要。 相似文献
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Zhenju Chen Yu Sun Xingyuan He Wei Chen Xuemei Shao Huayu Zhang Zhongyu Wang Xiaoyu Liu 《Frontiers of Forestry in China》2008,3(4):381-392
Taking Chinese pine in Qianshan Mountains as a sample, the tree ring width chronology including Standard, Residual, and Arstan
chronologies was established. The results show that the tree ring width of Chinese pine is highly correlated with the temperatures
from May to July and from September to November. Statistically significant positive correlations were observed between tree
ring width and the extreme minimum temperatures in July and mean minimum temperatures in September. The chronology was significantly
or very significantly correlated with extreme minimum temperatures in December and the following January, with mean minimum
temperatures in January, with annual precipitation and with precipitation in April, May and the following December. The Chinese
pine responded strongly to the monthly/yearly water vapor pressure and relative humidity. Annual and largely monthly evaporation
in April–July had a negative effect on tree growth, and was particularly striking for evaporation in April–July. The narrow
tree rings recorded by the chronology demonstrated the 30 occasions of extreme drought since 1800. The growth of Chinese pine
in the Qianshan mountains were also affected by climate changes on a hemispheric and global scale. There were 11-, 23-and
50-year-common periodicities between the chronology and solar activity and 10-, 20-and 45-year-common periodicities between
the chronology and geomagnetic activity.
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Translated from Chinese Journal of Applied Ecology, 2007, 18(10): 2191–2201 [译自: 应用生态学报] 相似文献
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Joni Kujansuu Koh Yasue Takayoshi Koike Anatoly P. Abaimov Takuya Kajimoto Takashi Takeda Morihiko Tokumoto Yojiro Matsuura 《Journal of Wood Science》2007,53(2):87-93
An analysis was performed on the climatic responses of the radial growth of Larix gmelinii (Rupr.) Rupr. on contrasting north-facing and south-facing slopes in Tura, central Siberia. We developed chronologies of
tree-ring width for four plots, designated as north-upper, northlower, south-upper, and south-lower. Both residual and standard
chronologies of tree-ring widths exhibited a significant positive correlation with temperature from the end of May until early
June in all four plots. The chronologies of ring width did not reveal any major difference in the response to temperature
among the four plots. The standard chronologies of ring widths on the north-facing slope were negatively correlated with precipitation
during the winter (October–April) and in early and mid-May, whereas the residual chronologies did not reveal clear relationships
with precipitation during the winter and May. The significant correlation between ring width and temperature from the end
of May until early June indicates that temperatures in springtime play a significant role in the radial growth of L. gmelinii. The negative correlations between standard chronologies of tree-ring width and precipitation in the winter and in May on
the north-facing slope indicate that lowfrequency fluctuations in snowfall have negative effects on the radial growth. However,
these effects vary and depend on the microscale topography.
Part of this report was presented at the 55th Annual Meeting of the Japan Wood Society, March 2005, Kyoto 相似文献
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Variations and correlations of various ring width and ring density features in European oak: implications in dendroclimatology 总被引：1，自引：0，他引：1
S. Y. Zhang 《Wood Science and Technology》1997,31(1):63-72
Summary Variations and correlations of various ring width and ring density features were analyzed in 18 European oak (Quercus petraea andQuercus robur) trees from northeastern France. In light of these analyses, the goodness of various tree-ring features as a climatic parameter was discussed. In general, ring density features (viz. earlywood density, latewood density, average ring density, minimum density and maximum density) show a stronger response to calendar year, a comprehensive climatic variable, than ring width features (viz. earlywood width, latewood width, total ring width and latewood percent). The response of latewood features (viz. latewood width, latewood density and maximum latewood density) is stronger than that of earlywood features (viz. earlywood width, earlywood density and minimum earlywood density). Average ring density seems to be the most sensible tree-ring feature in European oak in terms of the response to calendar year. Moreover, total ring width as a climatic parameter is not as good as latewood width, and maximum (latewood) density and minimum (earlywood) density appears not to contain as much climatic information as (average) latewood density and (average) earlywood density, respectively.This project was supported by the institut National de la Recherche Agromonique (INRA). Thanks are due to Dr. G. Nepveu for his constant encouragement and assistance during this study 相似文献