Increased sensitivity of Dahurian larch radial growth to summer temperature with the rapid warming in Northeast China

Trees ◽  
2016 ◽  
Vol 30 (5) ◽  
pp. 1799-1806 ◽  
Author(s):  
Xianliang Zhang ◽  
Xueping Bai ◽  
Yongxing Chang ◽  
Zhenju Chen
Keyword(s):  
Northeast China ◽  
Radial Growth ◽  
Summer Temperature ◽  
Dahurian Larch ◽  
Increased Sensitivity

scholarly journals The Effect of Crown Dimensions on Stem Profile for Dahurian Larch, Korean Spruce, and Manchurian Fir in Northeast China

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 398
Author(s):  
Amna Hussain ◽  
Muhammad Khurram Shahzad ◽  
Lichun Jiang
Keyword(s):  
Northeast China ◽  
Least Squares Method ◽  
Model Fitting ◽  
Nonlinear Least Squares ◽  
Dahurian Larch ◽  
Fit Statistics ◽  
Crown Length ◽  
Crown Shape ◽  
Natural Stands ◽  
Crown Dimensions

Crown architecture has long been evaluated for its impact on taper modeling. However, most of the research has focused on a limited number of crown dimensions. This study examined the effect of adding several crown dimensions in improving the diameter and volume estimates of Dahurian larch, Korean spruce, and Manchurian fir in northeast China. The crown dimensions included crown length, crown ratio, crown width, height to live crown base, diameter at the crown base, and crown shape. A well-known taper model of Clark et al. (1991) was fitted to the data of 276 trees from natural stands. To adjust the inherent autocorrelation in the data, we added a third-order continuous-time error structure in the model fit. Model fitting was carried out with the NLMIXED procedure (Non-linear Mixed Procedure), followed by the MODEL procedure of SAS using the generalized nonlinear least-squares method. Fit statistics and graphical assessments were used to evaluate the original and modified models. Above 98% of the total variance of d was explained by the models for all species. The addition of crown variables showed slight improvements for root mean square error (RMSE) values in the analyzed species. The RMSE plots indicated that the models with crown variables slightly improved the diameter and volume predictions for the species but only for the upper stem (>50%–90%). The study demonstrated that crown dimensions influence the stem taper, but the original model of Clark et al. (1991) reasonably realized that effect.

scholarly journals Response Characteristics of Chinese Pine (Pinus tabulaeformis Carr.) Radial Growth to Climate and Drought Variability Reconstruction in Western Liaoning, Northeast China

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 752
Author(s):  
Liu ◽  
Bao ◽  
Bao
Keyword(s):  
Northeast China ◽  
Radial Growth ◽  
Pinus Tabulaeformis ◽  
Western Liaoning ◽  
Chinese Pine ◽  
The Past ◽  
The North ◽  
Pinus Tabulaeformis Carr ◽  
The North Pacific

Chinese pine (Pinus tabulaeformis Carr.) plays an important role in maintaining ecosystem health and stability in western Liaoning Province and the southern Horqin sand land, Northeast China, with benefits including sand fixation and soil erosion. In the context of climate change, developing a better understanding of the relationship between climate factors and growth rates of this species will be extremely valuable in guiding management activities and meeting regional conservation objectives. Here, the results based on two groups of tree-ring samples show that the radial growth of Chinese pine is controlled primarily by water conditions. The longer chronology had the highest correlation coefficient with the January–September mean self-calibrating Palmer Drought Severity Index (scPDSI); therefore, drought variability was reconstructed for the period 1859–2014. Statistical analysis showed that our model explained 41.9% of the variance in radial growth during the 1951–2014 calibration period. Extreme dry and wet events, defined as the criteria of one standard deviation less or greater than the mean value, accounted for 19.9% and 18.6% of the 156-year climate record, respectively. During the past century, the regional hydroclimate experienced significant long-term fluctuations. The dry periods occurred from the early-1900s–1930s and 1980s–2000s, and the wet periods occurred from the 1940s–1970s. The drought reconstruction was consistent with the decreasing trend of the East Asian summer monsoon since the late 1970s. The reconstructed temporal patterns in hydroclimate in western Liaoning were closely related to the large-scale climate drivers in the North Pacific and the tropical equatorial Pacific. The teleconnections were confirmed by spatial correlations between the reconstructed sequence and sea surface temperature (SST) in the North Pacific, as well as the correlations with the Pacific Decadal Oscillation (PDO) and El Niño Southern Oscillation (ENSO) indices. Aerosols played an important role in affecting drought variations over the past several decades. Moisture stress caused by global warming and interdecadal changes in the PDO will have long-term effects on the growth of pines in the study area in the future.

Radial growth ofPinus koraiensisand carbon sequastration potential of the old growth forest in Changbai Mountain, Northeast China

2016 ◽  
Vol 36 (9) ◽  
Author(s):  
于健 YU Jian ◽  
罗春旺 LUO Chunwang ◽  
徐倩倩 XU Qianqian ◽  
孟盛旺 MENG Shengwang ◽  
李俊清 LI Junqing ◽  
...  
Keyword(s):  
Northeast China ◽  
Radial Growth ◽  
Changbai Mountain ◽  
Old Growth ◽  
Old Growth Forest

Responses of soil chemical and biological properties to nitrogen addition in a Dahurian larch plantation in Northeast China

2010 ◽  
Vol 333 (1-2) ◽  
pp. 81-92 ◽  
Author(s):  
Ya-Lin Hu ◽  
De-Hui Zeng ◽  
Yun-Xia Liu ◽  
Yu-Lan Zhang ◽  
Zhen-Hua Chen ◽  
...  
Keyword(s):  
Northeast China ◽  
Nitrogen Addition ◽  
Biological Properties ◽  
Dahurian Larch ◽  
Larch Plantation

Height and radial growth trends of Corsican pine in western France

2000 ◽  
Vol 30 (5) ◽  
pp. 712-724 ◽  
Author(s):  
François Lebourgeois ◽  
Michel Becker ◽  
Richard Chevalier ◽  
Jean-Luc Dupouey ◽  
Jean-Michel Gilbert
Keyword(s):  
Radial Growth ◽  
Site Index ◽  
Height Growth ◽  
Summer Temperature ◽  
Mean Annual Temperature ◽  
Climatic Data ◽  
Growth Trends ◽  
Cambial Age ◽  
Nitrogen Inputs ◽  
Annual Minimum Temperature

Height and radial growth trends were analysed in Corsican pine (Pinus nigra Arnold ssp. laricio var. Corsicana) plantations in western France. Difference in height growth was tested by comparing the site index of stands established before and after 1950 and the height growth development curves of 13 pairs of young and old stands growing side by side on the same soil type. The site index of the young stands was 20-30% greater than the site index of the old stands. From the period 1921-1991, radial growth increased 45, 31, and 50% in earlywood, latewood (LW) and total ring (TR) area, respectively. The amount of increase depended on cambial age. The LW/TR ratio decreased by 8%. The regional climatic data revealed a significant increase in mean annual temperature of 1.1°C, mean annual minimum temperature (1.5°C), mean summer temperature (2.2°C), and minimum summer temperature (2.3°C) for the period 1950-1997. Because of the negative correlation between summer temperature and ring widths, increased temperature cannot explain the observed increases in growth. Effects of nitrogen inputs, which averaged 6.3 and 11 kg·ha-1·year-1 for bulk and throughfall depositions, respectively; land use history; improvement in silvicultural practices (wider initial spacing, higher thinning); and CO2 fertilization are discussed as possible causes of the observed growth trends.

scholarly journals Litterfall and growth in three forests in Montseny massif

2014 ◽  
Author(s):  
Antonia Caritat Compte ◽  
Marina Pi ◽  
Lluís Vilar ◽  
Jordi Bou
Keyword(s):  
Water Availability ◽  
Radial Growth ◽  
Summer Temperature ◽  
The Other ◽  
Mediterranean Species ◽  
Deciduous Species ◽  
Central European ◽  
Accumulated Rainfall ◽  
Strong Gradient ◽  
Positive Effect

The nemoral forests of the montane level are especially interesting, because they are on the edge of their distribution. We want to see the influence of some environmental conditions (temperature and rainfall) on the litterfall and growth, in three kinds of these forests. The Montseny massif in the NE part of Iberian Peninsula, with a maximum altitude of 1.706 m, has a strong gradient of climate and vegetation, from the lowlands to the top of the mountains. We analyze three forests in the Montseny massif, two of them are composed by deciduous species not very extensive in the region (beech and sessile oak) and the other is a Mediterranean species, the mountain holm oak. We recollect data since 2007, monthly litterfall was measured and radial growth, and correlated with the climate of the study area. Our results shows that Fagus sylvatica recorded the biggest drop in annual litterfall (6.3 Mg / ha), followed by Q. ilex (5.3 Mg / ha) and Q. petraea (4.6 Mg / ha) all recorded values ​​are similar to those observed in other forests and mountains of the same state of maturity equivalent. The start of the growth took place in the spring and Quercus spp. occurred more gradually than in F. sylvatica. We found that the accumulated rainfall in late spring has had a positive effect specially on the growth of Quercus species while the effect of summer temperature has been especially prominent in beech. Mediterranean species show larger fluctuations growth than Central European ones in response to lower water availability.

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