scholarly journals Dynamics and regulations of ecosystem light use efficiency in a broad-leaved Korean pine mixed forest, Changbai Mountain

2015 ◽  
Vol 39 (12) ◽  
pp. 1156-1165 ◽  
Author(s):  
ZHANG Lei-Ming ◽  
◽  
◽  
◽  
◽  
...  
Keyword(s):  
Mixed Forest ◽  
Changbai Mountain ◽  
Light Use Efficiency ◽  
Korean Pine ◽  
Use Efficiency

Recovery of species diversity after disturbance of broad-leaved Korean pine mixed forest in Changbai Mountain

1998 ◽  
Vol 9 (3) ◽  
pp. 147-151 ◽  
Author(s):  
Hao Zhanqing ◽  
Wang Qingli ◽  
Zou Chunjing ◽  
Bu Rencang
Keyword(s):  
Species Diversity ◽  
Mixed Forest ◽  
Changbai Mountain ◽  
Korean Pine

Terrestrial CO2 Fluxes, Concentrations, Sources and Budget in Northeast China: Observational and Modeling Studies

2020 ◽  
Author(s):  
Xiaolan Li ◽  
Xiao-Ming Hu ◽  
Changjie Cai ◽  
Qingyu Jia ◽  
Yao Zhang ◽  
...  
Keyword(s):  
Land Surface ◽  
Northeast China ◽  
Ecosystem Respiration ◽  
Mixed Forest ◽  
Net Ecosystem Exchange ◽  
Growth Period ◽  
Rice Paddy ◽  
Light Use Efficiency ◽  
Maximum Light ◽  
Use Efficiency

<p>CO<sub>2</sub> fluxes and concentrations are not well understood in Northeast China, where dominant land surface types are mixed forest and cropland.  Here, we analyzed the CO<sub>2</sub> fluxes and concentrations using Eddy Covariance (EC) measurements, satellite observations, and the Weather Research and Forecasting model coupled with the Vegetation Photosynthesis and Respiration Model (WRF-VPRM).  We also used WRF-VPRM outputs to examine CO<sub>2</sub> transport/dispersion, and to quantify the biogenic and anthropogenic contributions to atmospheric CO<sub>2</sub> concentrations.  Finally, we investigated the uncertainties of simulating CO<sub>2</sub> fluxes related to four VPRM parameters (including maximum light use efficiency, photosynthetically active radiation half-saturation value, and two respiration parameters) using offline ensemble simulations with randomly selected parameter values.  The results indicated that mixed forests acted as a larger CO<sub>2</sub> source and sink than rice paddies on average in 2016 due to a longer growth period and stronger ecosystem respiration, although the minimum EC-measured daily mean net ecosystem exchange (NEE) was smaller at rice paddy (-10 μmol m<sup>-2</sup> s<sup>-1</sup>) than at mixed forest (-6.5 μmol m<sup>-2</sup> s<sup>-1</sup>) during the growing season (May through September).  The monthly fluctuation of column-averaged CO<sub>2</sub> concentrations (XCO<sub>2</sub>) exceeded 10 ppm in Northeast China during 2016.  Biogenic contribution (large negative in summer and insignificant in other months) offset about 70% of anthropogenic contribution of XCO<sub>2</sub> in this region.  WRF-VPRM modeling successfully captured seasonal and episodic variations of NEE and CO<sub>2</sub> concentrations, however, the NEE in mixed forest was overestimated during daytime, mainly due to the uncertainties of VPRM parameters, especially maximum light use efficiency.</p>

Composition and interannual dynamics of tree seedlings in broad-leaved Korean pine(Pinus koraiensis) mixed forest in Changbai Mountain

2009 ◽  
Vol 17 (4) ◽  
pp. 385 ◽  
Author(s):  
Zhang Jian ◽  
Li Buhang ◽  
Bai Xuejiao ◽  
Yuan Zuoqiang ◽  
Wang Xugao ◽  
...  
Keyword(s):  
Mixed Forest ◽  
Changbai Mountain ◽  
Pinus Koraiensis ◽  
Tree Seedlings ◽  
Korean Pine ◽  
Interannual Dynamics

Estimate of productivity in ecosystem of the broad-leaved Korean pine mixed forest in Changbai Mountain

2006 ◽  
Vol 49 (S2) ◽  
pp. 74-88 ◽  
Author(s):  
Miao Wang ◽  
Dexin Guan ◽  
Yuesi Wang ◽  
Zhanqing Hao ◽  
Yaqin Liu
Keyword(s):  
Mixed Forest ◽  
Changbai Mountain ◽  
Korean Pine

Composition and seasonal dynamics of seed rain in broad-leaved Korean pine (Pinus koraiensis) mixed forest in Changbai Mountain, China

2008 ◽  
Vol 28 (6) ◽  
pp. 2445-2454 ◽  
Author(s):  
Zhang Jian ◽  
Hao Zhanqing ◽  
Li Buhang ◽  
Ye Ji ◽  
Wang Xugao ◽  
...  
Keyword(s):  
Seasonal Dynamics ◽  
Mixed Forest ◽  
Seed Rain ◽  
Changbai Mountain ◽  
Pinus Koraiensis ◽  
Korean Pine

scholarly journals Relationship between Light Use Efficiency and Photochemical Reflectance Index Corrected Using a BRDF Model at a Subtropical Mixed Forest

2020 ◽  
Vol 12 (3) ◽  
pp. 550
Author(s):  
Li Ma ◽  
Shaoqiang Wang ◽  
Jinghua Chen ◽  
Bin Chen ◽  
Leiming Zhang ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Mixed Forest ◽  
Canopy Structure ◽  
Terrestrial Laser Scanning ◽  
Light Use Efficiency ◽  
Vegetation Canopy ◽  
Area Index ◽  
Photochemical Reflectance Index ◽  
Use Efficiency ◽  
Point Data

Light use efficiency (LUE) is a key indicator of vegetation photosynthesis, which provides important insights into how vegetation productivity responds to environmental conditions. The photochemical reflectance index (PRI) is based on reflectance at 531 and 570 nm, which reflects the xanthophyll cycle process of plants under different radiation conditions, and makes LUE related to plant optical characteristics. In this study, tower-based PRI and eddy covariance (EC) based LUEs were used to explore the ability of PRI to track LUE variations in a subtropical, evergreen mixed forest in South China. The results indicate that there is a stronger relationship between PRI and LUE, corrected by the bidirectional reflectance distribution function (BRDF), where R2 = 0.46 before correction and R2 = 0.60 after correction. Generally, PRI is able to capture diurnal and seasonal changes in LUE. Simultaneously, this study highlights a significant correlation between LUE and PRI, but there is also a large seasonal difference in its correlation. The correlation in winter was significantly stronger than summer. The strongest correlation is found in November (R2 = 0.91) and the weakest is in July (R2 = 0.34). Photosynthetically active radiation (PAR) had a strong influence on the LUE-PRI relationship, while vapor pressure deficit (VPD) and air temperature (Ta) had negative influences on the relationship between LUE and PRI. Terrestrial laser scanning is used to retrieve the vertical structure of forest crown. Our results show that the vegetation canopy structure (i.e., effective leaf area index, LAIe), extracted from terrestrial laser scanning (TLS) point data in subtropical mixed forests, had a weak influence on LUE. Our research suggests that environmental factors and vegetation canopy structures should be considered when using PRI to accurately estimate LUE.

scholarly journals Exploring Conservation Options in the Broad-Leaved Korean Pine Mixed Forest of the Changbai Mountain Region

2015 ◽  
Vol 35 (2) ◽  
pp. 171 ◽  
Author(s):  
Ma Lin ◽  
Yi Qu ◽  
Gongqi Sun ◽  
Jacky Wan ◽  
Junqing Li
Keyword(s):  
Mixed Forest ◽  
Changbai Mountain ◽  
Mountain Region ◽  
Korean Pine

Effects of biotic neighbors and environmental factors on tree　seedling survival in broad-leaved　Korean pine (Pinus koraiensis) mixed forest in Changbai Mountain

2015 ◽  
Vol 35 (19) ◽  
Author(s):  
肖翠 Xiao Cui ◽  
刘帅 Liu Shuai ◽  
黄珍 Huang Zhen ◽  
樊莹 Fan Ying ◽  
王均伟 Wang Junwei ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Seedling Survival ◽  
Mixed Forest ◽  
Changbai Mountain ◽  
Pinus Koraiensis ◽  
Korean Pine ◽  
Tree Seedling
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