The Influence of Canopy Gap Size and Environmental Heterogeneity on the Density and Spatial Patterns of Chinese Pine (Pinus Tabulaeformis) Regeneration

2021 ◽  
Author(s):  
Qun Yin ◽  
Xiaodeng Shi ◽  
Guisheng Luo ◽  
Zichu Shen ◽  
Shuangjiang Xiong ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Environmental Heterogeneity ◽  
Canopy Gap ◽  
Pinus Tabulaeformis ◽  
Gap Size ◽  
Chinese Pine

Effects of canopy gap size on growth and spatial patterns of Chinese pine ( Pinus tabulaeformis ) regeneration

2017 ◽  
Vol 385 ◽  
pp. 46-56 ◽  
Author(s):  
Zhibin Wang ◽  
Haijiao Yang ◽  
Boqian Dong ◽  
Mingming Zhou ◽  
Lvyi Ma ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Canopy Gap ◽  
Pinus Tabulaeformis ◽  
Gap Size ◽  
Chinese Pine

Regeneration response to canopy gap size in a Chinese pine plantation: Species diversity patterns, size structures and spatial distributions

2017 ◽  
Vol 397 ◽  
pp. 97-107 ◽  
Author(s):  
Zhibin Wang ◽  
Haijiao Yang ◽  
Boqian Dong ◽  
Mingming Zhou ◽  
Lvyi Ma ◽  
...  
Keyword(s):  
Species Diversity ◽  
Canopy Gap ◽  
Spatial Distributions ◽  
Gap Size ◽  
Pine Plantation ◽  
Diversity Patterns ◽  
Chinese Pine ◽  
Plantation Species ◽  
Regeneration Response

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.

Distribution of epicormic branches and foliage on Douglas-fir as influenced by adjacent canopy gaps

2018 ◽  
Vol 48 (11) ◽  
pp. 1320-1330
Author(s):  
John W. Punches ◽  
Klaus J. Puettmann
Keyword(s):  
Branch Length ◽  
Canopy Gaps ◽  
Douglas Fir ◽  
Canopy Gap ◽  
Tree Age ◽  
Gap Size ◽  
Terminal Bud ◽  
Total Branch Length ◽  
A Minor ◽  
Epicormic Branches

The influence of adjacent canopy gaps on spatial distribution of epicormic branches and delayed foliage (originating from dormant buds) was investigated in 65-year-old coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco). Sample trees were selected across a broad range of local densities (adjacent canopy gap sizes) from a repeatedly thinned stand in which gaps had been created 12 years prior to our study. Lengths and stem locations of original and epicormic branches were measured within the south-facing crown quadrant, along with extents to which branches were occupied by sequential (produced in association with terminal bud elongation) and (or) delayed foliage. Epicormic branches, while prevalent throughout crowns, contributed only 10% of total branch length and 2% of total foliage mass. In contrast, delayed foliage occupied over 75% of total branch length, accounted for nearly 39% of total foliage mass, and often overlapped with sequential foliage. Canopy gap size did not influence original or epicormic branch length or location. On original branches, larger gaps may have modestly negatively influenced the relative extent of sequential foliage on branches and (or) slightly positively influenced delayed foliage mass. Delayed foliage appears to contribute substantially to Douglas-fir crown maintenance at this tree age, but canopy gap size had a minor influence, at least in the short term.

scholarly journals Environmental heterogeneity blurs the signature of dispersal syndromes on spatial patterns of woody species in a moist tropical forest

PLoS ONE ◽  
2018 ◽  
Vol 13 (2) ◽  
pp. e0192341 ◽  
Author(s):  
Pablo Ramón ◽  
Eduardo Velázquez ◽  
Adrián Escudero ◽  
Marcelino de la Cruz
Keyword(s):  
Tropical Forest ◽  
Spatial Patterns ◽  
Environmental Heterogeneity ◽  
Woody Species ◽  
Dispersal Syndromes

Paternal cytoplasmic transmission in Chinese pine (Pinus tabulaeformis)

PROTOPLASMA ◽  
2005 ◽  
Vol 225 (1-2) ◽  
pp. 5-14 ◽  
Author(s):  
Fengli Guo ◽  
Shi-Yi Hu ◽  
Zongfei Yuan ◽  
Sze-Yong Zee ◽  
Yuzhen Han
Keyword(s):  
Pinus Tabulaeformis ◽  
Chinese Pine

scholarly journals Effect of Soil Layer and Plant–Soil Interaction on Soil Microbial Diversity and Function after Canopy Gap Disturbance

Forests ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 680 ◽  
Author(s):  
Xuan Yu ◽  
Lin Yang ◽  
Shixuan Fei ◽  
Zitong Ma ◽  
Ruqian Hao ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Enzyme Activities ◽  
Soil Layer ◽  
Soil Microbial Communities ◽  
Gap Size ◽  
Pine Plantation ◽  
Soil Microbial Diversity ◽  
Chinese Pine ◽  
Soil Microbial ◽  
Microbial Plfas

Gaps by thinning can have different microclimatic environments compared to surrounding areas, depending on the size of the gap. In addition, gaps can play important roles in biological dynamics, nutrient cycling, and seedling regeneration. The impacts of gap size on soil microbial communities and enzyme activities in different soil layers in Chinese pine plantations are not well understood. Here, we created gaps of 45 m2 (small, G1), 100 m2 (medium, G2), and 190 m2 (large, G3) by thinning unhealthy trees in an aged (i.e., 50 years old) monoculture Chinese pine plantation in 2010. Soil samples were collected in 2015. The total, bacterial, Gram-positive (G+), and Gram-negative (G−) phospholipid fatty acid (PLFA) profiles were highest in medium gaps in both the organic and mineral layers. These indicesdecreased sharply as gap size increased to 190 m2, and each of the detected enzyme activities demonstrated the same trend. Under all the gap size managements, abundances of microbial PLFAs and enzyme activities in the organic layers were higher than in the mineral layers. The soil layer was found to have a stronger influence on soil microbial communities than gap size. Redundancy analysis (RDA) based on the three systems with different gap sizes showed that undergrowth coverage, diversity, soil total nitrogen (TN), total organic carbon (TOC), and available phosphorus (AT) significantly affected soil microbial communities. Our findings highlighted that the effect of gap size on soil microenvironment is valuable information for assessing soil fertility. Medium gaps (i.e., 100 m2) have higher microbial PLFAs, enzyme activity, and soil nutrient availability. These medium gaps are considered favorable for soil microbial communities and fertility studied in a Chinese pine plantation managed on the Loess Plateau.

scholarly journals Spatial patterns of Pinus tabulaeformis and Pinus massoniana forests in Qinling-Daba Mountains and the boundary of subtropical and warm temperate zones

2020 ◽  
Vol 30 (9) ◽  
pp. 1523-1533
Author(s):  
Yonghui Yao ◽  
Yufan Hu ◽  
Zhixiang Kou ◽  
Baiping Zhang
Keyword(s):  
Spatial Patterns ◽  
Pinus Massoniana ◽  
Pinus Tabulaeformis ◽  
Warm Temperate
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