Human influence, regeneration, and conservation of the Gotjawal forests in Jeju Island, Korea

Kang, Hong-Gu; Kim, Chan-Soo; Kim, Eun-Shik

doi:10.1016/j.imic.2013.11.003

Cited by 23 publications

(20 citation statements)

References 3 publications

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“…Therefore, thus far it has only been used for grazing cattle, making charcoal or as a firewood source and is commonly recognized as useless land (Jeon et al, 2012;Jeong, 2012Jeong, , 2015Yoon, 2014). Recently, however, it has become known that Gotjawal is an area inhabited by various plants and animals where unique and various ecosystems are also sustained; the area serves as a natural waterway of the type necessary to create underground water, and it has high preservation value (Jeon et al, 2012;Kang et al, 2013;Yoon, 2014;Jeong, 2015). In addition, its cultural importance has also emerged.…”

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confidence: 99%

Floristic study of bryophytes in a subtropical forest of Nabeup-ri at Aewol Gotjawal, Jejudo Island

Yim

Hyun

2018

Korean J. Pl. Taxon

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This study presents a survey of bryophytes in a subtropical forest of Nabeup-ri, known as Geumsan Park, located at Aewol Gotjawal in the northwestern part of Jejudo Island, Korea. A total of 63 taxa belonging to Bryophyta (22 families 37 genera 44 species), Marchantiophyta (7 families 11 genera 18 species), and Anthocerotophyta (1 family 1 genus 1 species) were determined, and the liverwort index was 30.2%. The predominant life form was the mat form. The rates of bryophytes dominating in mesic to hygric sites were higher than the bryophytes mainly observed in xeric habitats. These values indicate that such forests are widespread in this study area. Moreover, the rock was the substrate type, which plays a major role in providing micro-habitats for bryophytes. We suggest that more detailed studies of the bryophyte flora should be conducted on a regional scale to provide basic data for selecting indicator species of Gotjawal and evergreen broad-leaved forests on Jejudo Island.

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confidence: 99%

Floristic study of bryophytes in a subtropical forest of Nabeup-ri at Aewol Gotjawal, Jejudo Island

Yim

Hyun

2018

Korean J. Pl. Taxon

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“…One such ecosystem is the Dongbaekdongsan wetland, which is designated as a National Wetland Protected Area by the Ministry of Environment of the Republic of Korea and classified as a Ramsar site (Ramsar Convention 2014). Gotjawal forest has a total land area of 11,000 ha, accounting for 6% of the total land area of Jeju Island (Kang et al 2013) and is situated on the middle slopes of Mount Halla, the highest mountain in the Republic of Korea. Furthermore, Kang et al (2013) 1994, van Laar and Akça 1997) were selected as candidate models to estimate the stem volume outside the bark of Quercus glauca in Jeju Island (Table 2).…”

Section: Study Sitementioning

confidence: 99%

“…Gotjawal forest has a total land area of 11,000 ha, accounting for 6% of the total land area of Jeju Island (Kang et al 2013) and is situated on the middle slopes of Mount Halla, the highest mountain in the Republic of Korea. Furthermore, Kang et al (2013) 1994, van Laar and Akça 1997) were selected as candidate models to estimate the stem volume outside the bark of Quercus glauca in Jeju Island (Table 2). These models have been used in several studies for different species in various countries (Tewari and Kumar 2001, Kozak and Kozak 2003, Tewari and Kumar 2003, Dela Cruz and Bruzon 2004, Segura and Kanninen 2005.…”

Section: Study Sitementioning

confidence: 99%

“…Stem volume can be estimated with field measurements of diameter at breast height (DBH) and total height and by allometric equation development (Teshome 2005, Akindele and LeMay 2006, Gonzalez-Benecke et al 2014). According to Avery and Burkhart (2002), volume equations are used to estimate the average content of standing trees of various sizes and et al 2007, Oh 2012, Kang et al 2013. However, the volume equation for Quercus glauca in Jeju Island, which is essential in accurately estimating the biomass and carbon stocks of Gotjawal forest, has not yet been developed.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and validation of stem volume models for Quercus glauca in the subtropical forest of Jeju Island, Korea

Seo¹,

Lumbres²,

Won³

et al. 2015

J. Ecol. Environ.

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This study was conducted to develop stem volume models for the volume estimation of Quercus glauca Thunb. in Jeju Island, Republic of Korea. Furthermore, this study validated the developed stem volume models using an independent dataset. A total of 167 trees were measured for their diameter at breast height (DBH), total height and stem volume using non-destructive sampling methods. Eighty percent of the dataset was used for the initial model development while the remaining 20% was used for model validation. The performance of the different models was evaluated using the following fit statistics: standard error of estimate (SEE), mean bias (E ), absolute mean deviation (AMD), coefficient of determination (R 2 ), and root mean square error (RMSE). The AMD of the five models from the different DBH classes were determined using the validation dataset. Model 5 (V = aD b H c ), which estimates volume using DBH and total height as predicting variables, had the best SEE (0.02745), AMD (0.01538), R 2 (0.97603) and RMSE (0.02746). Overall, volume models with two independent variables (DBH and total height) performed better than those with only one (DBH) based on the model evaluation and validation. The models developed in this study can provide forest managers with accurate estimations for the stem volumes of Quercus glauca in the subtropical forests of Jeju Island, Korea.

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“…In addition, Korean fir is designated as the Climate-sensitive Biological Indicator Species (CBIS) in Korea (Lee et al 2010). There are studies on the habitat, distribution, and population dynamics of the tree species (Kong and Watts 1993;Kim 1996;Koh et al 1996;Kim and Choo 2000;Kim et al 2007Kim et al , 2016Kim et al , 2017Song 2011;Song et al 2014); the radial growth of the tree species using tree rings being affected by ambient temperature and precipitation of the sites (Kim 1994;Koo et al 2001;Kang et al 2013;Zhang et al 2018); and potential effects of climate to tree growth including droughts Kim 2000, Kim et al 2015a). Currently, the growth dynamics of Korean fir trees as well as the interactions among the micro-climatic factors are not well known at the forest site of the mountain, however.…”

Section: Introductionmentioning

confidence: 99%

Precision monitoring of radial growth of trees and micro-climate at a Korean Fir (Abies koreana Wilson) forest at 10 minutes interval in 2016 on Mt. Hallasan National Park, Jeju Island, Korea

et al. 2019

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To understand the dynamics of radial growth of trees and micro-climate at a site of Korean fir (Abies koreana Wilson) forest on high-altitude area of Mt. Hallasan National Park, Jeju Island, Korea, high precision dendrometers were installed on the stems of Korean fir trees, and the sensors for measuring micro-climate of the forest at 10 minutes interval were also installed at the forest. Data from the sensors were sent to nodes, collected to a gateway wireless, and transmitted to a data server using mobile phone communication system. By analyzing the radial growth data for the trees during the growing season in 2016, we can estimate that the radial growth of Korean fir trees initiated in late April to early May and ceased in late August to early September, which indicates that period for the radial growth was about 4 months in 2016. It is interesting to observe that the daily ambient temperature and the daily soil temperature at the depth of 20 cm coincided with the values of about 10°C when the radial growth of the trees initiated in 2016. When the radial growth ceased, the values of the ambient temperature went down below about 15°C and 16°C, respectively. While the ambient temperature and the soil temperature are evaluated to be the good indicators for the initiation and the cessation of radial growth, it becomes clear that radii of tree stems showed diurnal growth patterns affected by diurnal change of ambient temperature. In addition, the wetting and drying of the surface of the tree stems affected by precipitation became the additional factors that affect the expansion and shrinkage of the tree stems at the forest site. While it is interesting to note that the interrelationships among the micro-climatic factors at the forest site were well explained through this study, it should be recognized that the precision monitoring made possible with the application of high resolution sensors in the measurement of the radial increment combined with the observation of 10 minutes interval with aids of information and communication technology in the ecosystem observation.

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Human influence, regeneration, and conservation of the Gotjawal forests in Jeju Island, Korea

Cited by 23 publications

References 3 publications

Floristic study of bryophytes in a subtropical forest of Nabeup-ri at Aewol Gotjawal, Jejudo Island

Floristic study of bryophytes in a subtropical forest of Nabeup-ri at Aewol Gotjawal, Jejudo Island

Evaluation and validation of stem volume models for Quercus glauca in the subtropical forest of Jeju Island, Korea

Precision monitoring of radial growth of trees and micro-climate at a Korean Fir (Abies koreana Wilson) forest at 10 minutes interval in 2016 on Mt. Hallasan National Park, Jeju Island, Korea

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