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장미나 ( Mi Na Jang ),김성용 ( Sung Yong Kim ),( Azyleah C. Abino ),김창현 ( Chang Hyun Kim ),이중효 ( Jung Hyo Lee ),이영진 ( Young Jin Lee ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 백두대간에 위치하고 있는 오대산 국립공원 신갈나무림을 대상으로 2012년 6월부터 2013년 5월까지 지상부와 지하부 현존량, 낙엽생산량, 낙엽층의 낙엽량과 토양의 유기탄소 분포를 조사하였으며, 탄소수지를 파악하기 위하여 토양호흡을 측정하였다. 오대산 신갈나무림에서 조사된 총유기탄소량은 93.07 ton C/ha으로, 지상부와 지하부의 유기탄소량은 각각 72.36 ton C/ha, 18.09 tonC/ha이었으며, 낙엽층과 토양의 유기탄소량은 각각 4.39 ton C/ha, 42.28 ton C/ha이었다. 오대산 신갈나무림에서 연간 광합성을 통하여 식물체에 고정되는 유기탄소량은 5.46 ton C/ha/yr로 임내 층위에 따라 교목층 4.26 ton C/ha/yr, 관목층 0.24 ton C/ha/yr, 초본층 0.95 ton C/ha/yr의 유기탄소가 고정되어 있다. 또한 조사기간 동안 낙엽을 통하여 임상으로 유입되는 유기탄소량은 2.840 tonC/ha/yr이었다. 토양호흡을 통하여 방출되는 탄소량은 5.52 ton C/ha/yr으로 이 중 미생물호흡을 통해 방출되는 탄소량은 2.98 ton C/ha/yr이고, 뿌리호흡을 통하여 방출되는 탄소량은 2.54 tonC/ha/yr이었다. 그 결과, 오대산 신갈나무림에서 연간 대기로부터 순 흡수하는 유기탄소는 2.48 tonC/ha/yr로 조사되었다. This study was conducted to estimate Litter Production and carbon budget of Quercus mongolica stands in the Mt. Odae National Park. Above and below ground standing biomass, litter layer, soil organic carbon, and soil respiration were measured to estimate the amount of carbon and the carbon budget from June 2012 through May 2013. Total amount of carbon was 93.07 ton C/ha attributed to above (72.36 ton C/ha) and below (18.09 ton C/ha) ground biomass, litter layer (4.39 ton C/ha) and soil organic carbon (42.28 ton C/ha). This was equivalent to 5.46 ton C/ha/yr where 4.26 ton C/ha/yr is from above and below ground biomass, 0.24 ton C/ha/yr from shrub and 0.95 ton C/ha/yr from herb. In addition, the amount of organic carbon returned to the forest through litterfall was 2.840 ton C/ha/yr. The amount of carbon evolved through soil respiration was 5.52 ton C/ha/yr to which 2.98 ton C/ha/yr was accounted for microbial respiration while the remaining 2.54 ton C/ha/yr was due to root respiration. Based on the estimation of the difference between Net Primary Production and microbial respiration, the amount of atmospheric carbon sequestered by Quercus mongolica stands was 2.48 ton C/ha/yr.
장미나 ( Mi Na Jang ),김성용 ( Sung Yong Kim ),( Azyleah C. Abino ),김창현 ( Chang Hyun Kim ),이중효 ( Jung Hyo Lee ),이영진 ( Young Jin Lee ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 백두대간에 위치하고 있는 오대산 국립공원 소나무림을 대상으로 2012년 6월부터 2013년 5월까지 지상부와 지하부 현존량, 낙엽생산량, 낙엽층의 낙엽량과 토양의 유기탄소 분포를 조사하였으며, 탄소수지를 파악하기 위하여 토양호흡을 측정하였다. 오대산 소나무림에서 조사된 총 유기탄소량은 230.11 ton C/ha으로, 지상부와 지하부의 유기탄소량은 각각 182.78 ton C/ha, 45.70 tonC/ha이었으며, 낙엽층과 토양의 유기탄소량은 각각 5.98 ton C/ha, 45.40 ton C/ha이었다. 오대산 소 나무림에서 연간 광합성을 통하여 식물체에 고정되는 유기탄소량은 17.76 ton C/ha/yr로 임내 층위에 따라 유기탄소가 고정되어 있다. 또한 조사기간 동안 낙엽을 통하여 임상으로 유입되는 유기탄소 량은 3.233 ton C/ha/yr이었다. 토양호흡을 통하여 방출되는 탄소량은 5.76 ton C/ha/yr으로 이 중미생물호흡을 통해 방출되는 탄소량은 3.11 ton C/ha/yr이고, 뿌리호흡을 통하여 방출되는 탄소량은2.65 ton C/ha/yr이었다. 그 결과, 오대산 소나무림에서 연간 대기로부터 순 흡수하는 유기탄소는 14.65 ton C/ha/yr로 조사되었다. This study was conducted to estimate carbon sequestration and carbon budget of Pinus densiflora stands in the Mt. Odae National Park. Above and below ground standing biomass, litter layer, soil organic carbon, and soil respiration were measured to estimate the amount of carbon and the carbon budget from June 2012 through May 2013. Total amount of carbon was 230.11 ton C/ha attributed to above (182.78 ton C/ha) and below (45.70 ton C/ha) ground biomass, litter layer (5.98 ton C/ha) and soil organic carbon (45.40 ton C/ha). This was equivalent to 17.76 ton C/ha/yr from above and below ground biomass, shrub and herb. In addition, the amount of organic carbon returned to the forest through litterfall was 3.233 ton C/ha/yr. The amount of carbon evolved through soil respiration was 5.76 ton C/ha/yr to which 3.11 ton C/ha/yr was accounted for microbial respiration while the remaining 2.65 ton C/ha/yr was due to root respiration. Based on the estimation of the difference between Net Primary Production and microbial respiration, the amount of atmospheric carbon sequestered by Pinus densiflora stands was 14.65 ton C/ha/yr.
Azyleah C. Abino,이영진,Jose Alan A. Castillo 한국산림과학회 2014 Forest Science And Technology Vol.10 No.1
This study was conducted to assess the species diversity and carbon sequestration potential of a natural mangrove stand inBotoc, Pinabacdao, Samar, the Philippines. Using the quadrat sampling technique, 12 plots with a size of 100 m2 wereestablished to facilitate inventory and measurement of trees. Shannon-Wiener index and allometric equations were used todetermine species diversity, and biomass and tree carbon storage, respectively. The community’s species diversity (H0 ¼1.6365) was very low with a total of eight true mangrove species recorded, dominated by Avicennia officinalis with animportance value of 134.80%. Among the plots, a greater percentage of the total biomass was accounted to the abovegroundbiomass, corresponding to 74% (297.20 t ha1), while the remaining 26% (103.87 t ha1) was credited to theroot biomass. The total carbon sequestered and stored in the biomass of the natural mangrove stand was 188.50 t C ha1equivalent to 691.81 t CO2 ha1. The biomass and carbon density estimates acquired in this study suggest that natural mangroveforests in Botoc have the potential to sequester and store a huge amount of atmospheric carbon regardless of the verylow species diversity.
( Azyleah C. Abino ),( Sung Yong Kim ),( Mi Na Jang ),( Chang Hyun Kim ),( Ho Jong Yun ),( Young Jin Lee ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
In forest management planning, diameter distribution of trees is an essential tool for describing forest structure and for various forestry estimations such as stand volume characteristics and stand growth and yield. In practice, different diameter distribution equations have been widely used to describe tree stock. Among these mathematical forms, Weibull distribution model is one of the most commonly used to quantify the diameter distributions of even-aged or uneven-aged forests because it is relatively simple and flexible, does not require numerical integration and its parameters can be easily estimated. Hence, this study was carried out to quantify the diameter distributions for Pinus thunbergii stands in the southern coast of Korea using the percentile-based Weibull function. Specifically, the parameter recovery technique was utilized to estimate the Weibull parameters from the predicted quadratic mean diameter ( Dq), minimum diameter, 25th percentile, 50th percentile and 95th percentile. The performance of the different models ( Dq, D0, D25, D50, and D95) was evaluated using fit index ( R2) and root mean square error ( RMSE). Results showed that R2 range from 0.55098 (minimum diameter) to 0.93851(50th diameter percentile) and the RMSE range from 0.13147 (quadratic mean diameter) to 4.75490 (95th diameter percentile). To further evaluate the developed Weibull diameter distribution model, the mean bias (E) in trees per ha (TPH) for each diameter class was likewise determined. Based on the evaluation, the highest over prediction was found in the 18 cm and 22 cm diameter classes, while the highest under prediction was recorded in the 14 cm diameter class. The results of this study will serve as input in the development of diameter distribution yield prediction system for Pinus thunbergii stands in Korea, which will be the focus of future study.
Assessing land use and land cover of the Marikina sub-watershed, Philippines
이영진,Azyleah C. Abino,김성용,장미나,정주상 한국산림과학회 2015 Forest Science And Technology Vol.11 No.2
The integrated remote sensing (RS) and geographic information system (GIS) approach was utilized in this study to classify land use and land cover (LULC), detect changes based over time, and identify transition trends in the Marikina subwatershed, Laguna de Bay watershed, Philippines. Landsat 5 Thematic Mapper (TM) imageries acquired in 1999 and 2006 were pre-processed and classified using a supervised classification technique with maximum likelihood classifier algorithm in RS and were used to develop maps of the sub-watershed and sub-subwatershed levels in a GIS platform. LULC change analysis revealed that, from 1999 to 2006, significant changes occurred in the sub-watershed as indicated by the increase of agricultural (11.76%) and orchard (4.52%) areas at the expense of brushland (16.56%) areas. Other LULC such as water bodies, built-up, forest, and grassland remain almost unchanged. In the sub-subwatershed level, Tayabasan experienced minimal change, whilst Tanay had the most transitions. Overall accuracy and kappa statistics were then derived using the confusion matrix, which resulted in 96.15% and 95.49% for 1999 imagery, and 93.82% and 92.73% for 2006 imagery, respectively. LULC persistence and transition trends were analyzed using land change modeler, while the Markov chain model has been utilized to predict the LULC distribution in 2020 pertinent to rates of change from 1999 to 2006. This study contributes not only to the understanding of the past and present landscape of the sub-watershed, but also provides an idea of the areas that need rehabilitation for the formulation of suitable mitigation measures and strategies toward the sustainable management of the sub-watershed.