• 한국습지학회지
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• 제11권1호
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• pp.99-104
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• 2009

곶자왈 숲이란 대한민국 제주도에 있는 "아아 용암"이라는 바위 지대 위에 형성된 숲을 가리킨다. 이 논문에서 곶자왈 숲이 람사협약상 국제적으로 중요한 습지임이 밝혀진다. 곶자왈 숲은 람사협약에서 습지의 한 종류로 규정하고 있는 지하수시스템이므로 람사협약상 습지로 간주되어야 한다. 또한 곶자왈 숲은 수문학적 중요성을 가지고 있는 제주도의 대표적인 습지유형이며 희귀식물들의 자생지이므로 국제적으로 중요한 습지이다.

• 한국환경복원기술학회지
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• 제17권5호
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• pp.43-49
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• 2014

Fairy Pittas use the forest around the valley and Gotjawal as breeding places. This survey was conducted to investigate the characteristic of earthworms, specifically its population density, body size around the breeding site in Gotjawal and the forest around the valley areas from the middle of July to the end of July 2013. A total of 405 individual earthworms were collected in the 100 small established quadrats, in which 315 were found in Gotjawal and 90 were found in the forest around the valley area. The density of earthworms in Gotjawal was significantly higher compared to that forest around the valley area. It was also observed that the body size of earthworms was significantly different between Gotjawal and the forest around the valley area. Proportion of number of individuals which are larger than 7cm in body size was 43%(n=135) in Gotjawal and 84%(n=76) in the forest around the valley area, respectively. Soil area was not important factor to the density of earthworms. We suggest that Gotjawal can be considered as a suitable breeding site for Fairy Pitta because of the richness of its primary food in this area.

• 한국응용과학기술학회지
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• 제37권6호
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• pp.1489-1495
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• 2020

Gotjawal, Jeju Island, Korea is a lava-formed forest with low soil content that is unique in the world. Around 6 percent of the Jeju Iand is classified as a lava-based specific forest. The forest has been gradually disappearing during the last several decades, with approximately one half having been destroyed. Our study undertakes a detailed analysis of the landscape of the lava subsidence, and describes the fungi, vegetation, and soils of Cheongsu Gotjawal. Soil samples from the Gotjawal were collected, and soil analyses as well as pyrosequencing of the internal transcribed spacer gene for fungal communities were performed. Soil fungal communities are represented by Discisedars, Fusarium, Pleochaeta, and Fuscoporia genera. Endemic vegetation of the Gotjawal includes the plants Pleris critical, Machilus japonica, Quercus glauca, Arachniodes aristata, and Neocheiropteris ensata. Results of soil analysis indicate sandy loam with 31.70% organic matter, and 1.36 mg/kg of total nitrogen. This fundamental information can help understand the invaluable and unique nature of Cheongsu Gotjawal, and the necessity for more studies on Gotjawal.

• 한국환경과학회지
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• 제31권12호
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• pp.1013-1025
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• 2022

This study was carried out to analyze water cycle characteristics and evaluate water retention function in Jeju Gotjawal forest from 2013 to 2017. The average ratio of throughfall, stemflow, interception loss in Seonhul Gotjawal (SH) and Cheongsu Gotjawal (CS) was 43.1%, 15.8%, and 41.1%, respectively. Rainfall-throughfall, rainfall-stemflow, and rainfall-interception loss were expressed as linear regression equation (p<0.001). The comparison results showed that SH was higher than CS (p<0.05), indicating that the canopy area had an important effect on the difference in stand structure. The average water resources retention rate of the Gotjawal region was 41.9%, which is similar to the total water resources retention rate (40.6%) of Jeju Special Self-Governing Province (JSSGP). Currently, the development of Gotjawal is in progress in JSSGP. The development of Gotjawal will lead to a decrease in the water resources retention rate due to changes in the surface environment such as an increase in impervious areas, which will affect the total groundwater content of JSSGP. Therefore, the conservation of the Gotjawal area is judged to be very important from the point of view of water conservation.

• 한국환경농학회지
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• 제41권3호
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• pp.217-221
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• 2022

BACKGROUND: Gotjawal forest on Jeju Island is characterized by uneven topography that developed as a result of freezing-thawing weathering process and irregular substrates caused by numerous lava-flow collapses. Sanyang Gotjawal, located in southwest of Jeju Island, is a well-developed forest with a long history. In addition to photographs, there is a need for a good way to describe the unique features of Gotjawal, including its geology and vegetation. METHODS AND RESULTS: We illustrated the area's natural features using Clip Studio Paint 1.12.0. To reveal its complexity, we separated the vegetation and geological features in the illustrations. CONCLUSION(S): We drew a cross-section of Gotjawal's unique layers, including lava flows. In addition to an eco-geological approach, we described the dominant vegetation and geological characteristics of the three forest layers (trees, shrubs, and herbs) in Gotjawal.

• 한국환경교육학회지:환경교육
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• 제23권3호
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• pp.97-114
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• 2010

The aims of this study are to develop and apply a Nature Game program for the ecological experience learning in Jeju Gotjawal forest and analyze the environmental sensitivity change of the students. The results obtained in 4th graders of A elementary school of Seogwipo-city are as follows: It was found that attention, susceptibility and practice will of environment protection for forest environment of the experimental class were significantly higher than those of the comparison class. And it was found that interest and curiosity into forest environment were also elevated in the results of the qualitative evaluation, suggesting that we could get the effect of developed Nature Game program on ecological experience learning. If various ecological experience learning programs considering the regional-specific characteristics are developed to cause students' interest and curiosity, students would come to participate in the protection activity of environment aggressively a little more.

• 한국환경과학회지
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• 제28권11호
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• pp.917-925
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• 2019

All of the animals and the plants in ecosystem are intimately connected to one another and the changes of forests and surroundings affect directly wild animals. This study was conducted at Hangyeong-myeon Cheongsu-ri located in the western part of Jeju Island belonging to Hangyeong Andeok Gotjawal Zone and Jocheon-eup Seonheul-ri located in the eastern part of Jeju Island belonging to Jocheon Hamdeok Gotjawal Zone. The survey on advent of birds was carried out twice a month from January 2014 to December 2015. We divided habitat environments into three survey sites such as a forest, a shrub forest and a farmland. A total of 65 species and 4,802 individuals were observed during the survey period. In a forest, 36 species and 1,287 individuals were observed while A shrub forest had 40 species and 1,554 individuals. And in a farmland, 41 species and 1,961 individuals were observed. The only 10 species were observed in forest and the only 7 species in shrub forest and the only 10 species in farmland. The species diversity and the evenness of a farmland were the highest, and the species richness was the highest in a shrub forest, and the dominance of a forest was the highest among the three areas. The similarity index between a shurb forest and a farmland was high while that between a forest and a farmland was low. The similarity index related with breeding appeared that a forest and a farmland was different from each other.

• 한국농림기상학회지
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• 제17권2호
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• pp.136-143
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• 2015

독특한 생태계를 가지고 있는 곶자왈지역을 보호하기 위해 동물의 서식처로서의 접근이 필요하다. 본 연구는 2013년 2월부터 2014년 12월까지 월 2회 조류조사를 실시하였고 제주도 서부에 위치한 한경-안덕곶자왈지대에 속하는 제주특별자치도 제주시 한경면 청수리와 제주도 동부에 위치한 조천-함덕곶자왈지대에 속하는 제주시 조천읍 선흘리를 대상으로 하였다. 두 곶자왈지역에서 총 66종 4,140개체가 관찰되었고 선흘곶자왈지역에서는 53종 1,907개체가, 청수곶자왈지역에서는 49종 2,233개체가 조사되었다. 두 곶자왈지역간 종수는 통계적으로 차이가 없었으나, 개체수는 두 곶자왈지역간에 유의한 차이를 보였다. 두 지역간 공통종은 36종으로 유사도 지수는 0.7이었다. 계절적 출현형으로 살펴보면, 두 곶자왈지역에서 텃새는 23종, 겨울철새는 15종, 나그네새는 16종, 여름철새는 11종, 길잃은새 2종이었고 선흘곶자왈지역과 청수곶자왈지역은 비슷한 양상을 나타냈다. 천연기념물과 멸종위기야생생물을 포함한 법정보호종은 12종이었고 선흘곶자왈지역에서는 8종이, 청수곶자왈지역에서 10종이 관찰되었다. 관찰된 조류 중 습지를 직접 이용하거나 수분과 관련된 먹이자원을 이용하는 종은 선흘곶자왈지역은 12종, 청수곶자왈지역에서는 6종이 기록되었으며 통계적으로 유의한 차이는 나지 않았다. 개체수에서는 선흘곶자왈지역에서 89개체가, 청수곶자왈지역에서는 30개체가 관련 종들이었으며 두 곳을 비교하였을 때 통계적으로 유의한 차이를 보였다. 두 곶자왈지역간의 출현종 차이의 원인을 밝히기 위해 곶자왈 숲 내 형성된 습지 및 미세기후에 대한 연구가 필요하며 곶자왈지역 보전을 위한 방안 마련시 두 곶자왈 지역의 차이를 반영할 수 있어야 한다고 판단된다.

• Journal of Ecology and Environment
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• 제41권8호
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• pp.223-234
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• 2017

Background: Spatial structure of plants in a population reflects complex interactions of ecological and evolutionary processes. For dioecious plants, differences in reproduction cost between sexes and sizes might affect their spatial distribution. Abiotic heterogeneity may also affect adaptation activities, and result in a unique spatial structure of the population. Thus, we examined sex- and size-related spatial distributions of old-growth forest of dioecious tree Torreya nucifera in extremely heterogeneous Gotjawal terrain of Jeju Island, South Korea. Methods: We generated a database of location, sex, and size (DBH) of T. nucifera trees for each quadrat ($160{\times}300m$) in each of the three sites previously defined (quadrat A, B, C in Site I, II, and III, respectively). T. nucifera trees were categorized into eight groups based on sex (males vs. females), size (small vs. large trees), and sex by size (small vs. large males, and small vs. large females) for spatial point pattern analysis. Univariate and bivariate spatial analyses were conducted. Results: Univariate spatial analysis showed that spatial patterns of T. nucifera trees differed among the three quadrats. In quadrat A, individual trees showed random distribution at all scales regardless of sex and size groups. When assessing univariate patterns for sex by size groups in quadrat B, small males and small females were distributed randomly at all scales whereas large males and large females were clumped. All groups in quadrat C were clustered at short distances but the pattern changed as distance was increased. Bivariate spatial analyses testing the association between sex and size groups showed that spatial segregation occurred only in quadrat C. Males and females were spatially independent at all scales. However, after controlling for size, males and females were spatially separated. Conclusions: Diverse spatial patterns of T. nucifera trees across the three sites within the Torreya Forest imply that adaptive explanations are not sufficient for understanding spatial structure in this old-growth forest. If so, the role of Gotjawal terrain in terms of creating extremely diverse microhabitats and subsequently stochastic processes of survival and mortality of trees, both of which ultimately determine spatial patterns, needs to be further examined.

• 한국산학기술학회논문지
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• 제18권10호
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• pp.471-479
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• 2017

본 연구는 대상자들(35명)이 제주곶자왈 산림을 방문하기 전과 후의 타액cortisol 함량의 변화를 조사하는 것이 목적이었다. 방문 전후에 타액을 채취하여 항혈청면역법으로 분석을 하였다. 연구기간은 2017년 5월 1일부터 6월 30일 4 주간에 실시하였다. 대조군의 사전과 사후의 측정 cortisol 평균치는 유의성이 없었다. 실험군의 평균치는 사전보다 사후에는 감소하는 경향을 보였으나 유의하지는 않았다. Cortisol 함량의 차이는 대조군과 실험군은 사전에는 유의한 차이를 보이지 않았으나, 사후에는 대조군보다 실험군이 낮게 나타나서 유의한 차이를 보였다. Cortisol 평균값은 남자의 경우에 대조군보다 실험군이 낮았다. 여자의 경우에 대조군보다 실험군이 낮아서 남자가 여자보다 2배 이상 큰 변화를 보이었다. 사후의 측정치는 대조군보다 실험군의 cortisol함량이 낮게 나타나 유의한 차이를 보였다. 사후의 성별 및 대조군과 실험군 별 분석에서는 성별, 집단, 성별과 집단의 결합효과 간에 유의하게 나타났다. 즉 성별과 집단에 따른 cortisol 수치의 차이가 있음을 알 수 있다. 본 연구는 삼림욕의 효과를 나타내는 기본 자료를 제공하고 있다.