Assessment of Plant Diversity, Biomass and Carbon Sequestration Potential of Natural Mangrove Forest in Samar, Philippines

Azyleah C. Abino,Jose Alan A. Castillo,Roscinto Ian C. Lumbres,Sung Yong Kim,Mi Na Jang,Young Jin Lee 한국산림휴양복지학회 2013 한국산림휴양학회 학술발표회 자료집 Vol.2013 No.4

Assessment of species diversity, biomass and carbon sequestration potential of a natural mangrove stand in Samar, the Philippines

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.

KSFMI-P3 : Quantifying diameter distributions with percentile-based Weibull function for P inus thunbergi i in South Sea, South Korea1)

( 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.

Assessment of Plant Diversity, Biomass and Carbon Sequestration Potential of Natural Mangrove Forest in Samar, Philippines

( Azyleah C Abino ),( Jose Alan A Castillo ),( Roscinto Ian C Lumbres ),( Sung Yong Kim ),( Mi Na Jang ),( Young Jin Lee ) 한국임학회 2013 산림과학 공동학술대회 논문집 Vol.2013 No.-

Simulation of Streamflow and Sediment Yield with the SWAT model in the Laguna de Bay Watershed, Philippines

( Azyleah C Abino ),( Sung Yong Kim ),( Mi Na Jang ),( Young Jin Lee ) 한국임학회 2013 한국임학회 학술발표논문집 Vol.2013 No.-

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.

주요 침엽수종의 수관층 연료특성 분석

김성용 ( Sung Yong Kim ),장미나 ( Mina Jang ),( Azyleah C. Abino ),김창현 ( Chang Hyun Kim ),이영진 ( Young Jin Lee ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구 목적은 우리나라 주요 침엽수종을 대상으로 국립산림과학원에서 개발된 바이오매스추정식과 제 5차 국가산림자원조사 자료를 활용하여 수관층 연료특성 분석하고자 하였다. 본 연구결과, 수관연료밀도(kg/m³)는 잣나무가 가장 높고, 강원지방소나무, 곰솔, 리기다소나무, 중부지방소 나무 일본잎갈나무 순 이었으며(0.090-0.340 kg/m³), 지하고(m)의 경우 일본잎갈나무가 가장 높고, 강원지방소나무, 잣나무, 중부지방소나무, 리기다소나무, 곰솔 순 이었다(4.81-5.19 m). 임분단위 수관 연료량 추정식 모형의 조정결정계수(R2(adj))는 0.6321∼0.9950, 지하고 추정식 모형의 조정결정계수 (R2(adj)는 0.6390∼0.8536의 범위를 보였다. The objective of this study was to assess the canopy and fuel characteristics of five major coniferous species in Korea. The allometric equations for the canopy fuel load and canopy based height of major conifer species was estimated based on the biomass allometric equation developed by the Korea Forest Research Institute using the data from the 5th National Forest Inventory. Among the major coniferous species, Pinus koraiensis had the highest mean canopy bulk density, followed by Gangwon region Pinus densiflora, Pinus thunbergii, Pinus rigida, Central region Pinus densiflora and Larix leptolepis in decreasing order (0.340-0.090 kg/m3). In terms of mean canopy base height, highest value was recorded from Larix leptolepis, followed by Gangwon region Pinus densiflora, Pinus koraiensis, Central region Pinus densiflora, Pinus rigida, and Pinus thunbergii was the lowest (4.81-5.19 m). The adjusted multiple coefficient of determination of the developed models ranged from 0.6321 to 0.9950 for canopy fuel load and 0.6390 to 0.8539 for canopy base height.

35년생 잣나무림의 수관연료량 추정을 위한 상대생장식 개발

김성용 ( Sungyong Kim ),장미나 ( Mi Na Jang ),( Azyleah C. Abino ),김창현 ( Chang Hyun Kim ),이병두 ( Byung Doo Lee ),이영진 ( Young Jin Lee ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구의 목적은 우리나라 35년생 잣나무림을 대상으로 수관층 연료량을 추정하기 위한 상대 생장식을 개발하고자 하였다. 연구대상지는 경기도 가평군, 강원도 홍천군, 정선군 국유림 내 잣나무조림지로 선정하였으며, 총 24본의 표본목을 벌채하여 분석에 이용하였다. 수관연료량 추정을 위해 수간, 잎, 가지로 분류하여 무게를 측정하였으며, 가지는 고사여부와 직경 크기별로 세분화하여 구분하였다. 상대생장식은 흉고직경 또는 흉고직경과 수고를 독립변수로 이용하는 회귀식을 사용하였다. 연구 결과에 의하면, 대부분의 수관 부위에서 ln Wt=β0+β1ln D 식이 조정결정계수가 가장 높고=(R2(adj)=0.6021-0.9742) 표준추정오차가 가장 낮게 나타났다( S.E.E.=0.2018-0.7271). 한편, 수관화 확산 시 연소가능한 연료(잎과 직경 1 cm 이하 가지)의 비율은 총 수관에서 55.6%로 매우 높게 나타났다. The objective of this study was to develop allometric equations for the estimation of crown fuel biomass of Pinus koraiensis in South Korea. A total of twenty four representative trees were destructively sampled in Gapyeong, Hongcheon, and Jeongseon. Crown fuel were weighed separately for each fuel category by size class and by living and dead. The results of this study showed that adjusted coefficient of determination values were the highest =(R2(adj)=0.6021-0.9742)and standard error of estimate were the lowest ( S.E.E.=0.2064∼0.8578) in allometric equation ln Wtln Wt=β0+β1ln D The available fuels that are consumed during crown fires (i.e. needles and twigs with diameter less than 1 cm) comprised 55.6% of the total crown fuel biomass.

충남지역 상수리나무의 바이오매스 확장계수와 상대생장식

김창현 ( Chang Hyun Kim ),김성용 ( Sung Yong Kim ),장미나 ( Mina Jang ),( Azyleah C. Abino ),이영진 ( Young Jin Lee ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구는 줄기밀도와 바이오매스 확장계수를 조사 분석하고 상대생장식을 유도함으로써 바이오매스 추정에 대한 정보를 제공하는 것을 목적으로 하였다. 연구대상지는 충남지역의 대표 활엽수종인 상수리나무 임분을 대상으로 하였고, 총 15본의 표본목을 벌채하여 분석에 이용하였다. 본 연구결과, 상수리나무림의 줄기밀도(g/cm3)는 0.496∼0.825으로 나타났으며, 뿌리를 굴취한 9본의 임목전체 바이오매스 확장계수는 1.364∼2.403으로 나타났다. 흉고직경(D)을 독립변수로 하는 대수회귀식을이용하여 상대생장식을 유도한 결과 흉고직경이 증가함에 따라 바이오매스량이 증가하는 패턴을 보 였다. 임목전체의 조정결정계수(R2adj)는 0.982로 높은 값이 나왔고, 부위별 지상부, 줄기, 뿌리의 조정 결정계수(R2 adj)는 0.950 이상으로 나타난 반면에 잎과 가지의 조정결정계수(R2adj)는 0.655, 0.856 으로 다소 낮게 나타났다. The objective of this study was to determine the stem density, biomass expansion factor and biomass of Quercus acutissima stands in Chungcheongnam-do, South Korea. A total of fifteen representative trees were destructively sampled for data collection and stem analysis. The results showed that stem density (g/cm3) of Quercus acutissima stands vary from 0.496 to 0.825. The total biomass expansion factor, including aboveground and root, ranges from 1.364 to2.403. In this study, biomass was estimated using allometric equation with diameter at breast height as independent variable. The results showed that as DBH increases, biomass also increases. Based on the analysis, adjusted coefficient of determination (R2 adj) of the total biomass was equivalent to 0.983. In terms of aboveground biomass, stem showed higher R2 adj (0.950)compared to the branch (0.856) and foliage (0.655).

오대산 소나무림의 유기탄소 분포 및 수지

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.