• The Korean Journal of Mycology
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• v.46 no.2
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• pp.114-121
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• 2018

We isolated endophytic fungi from the leaves of the conifer Juniperus chinensis var. sargentii inhabiting Mt. Hallasan. The fungal isolates were identified based on phylogenetic analysis using nucleotide sequences of the internal transcribed spacer region, large subunit region of ribosomal DNA, translation elongation factor, and ${\beta}$-tubulin region. In this study, we confirmed four species of unreported endophytic fungi in Korea, Allantophomopsis lycopodina, Epicoleosporium ramularioides, Kabatina juniperi, and Seiridium podocarpi. We describe their morphological characteristics and the results of the phylogenetic analysis.

• Korean Journal of Environmental Biology
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• v.35 no.4
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• pp.437-445
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• 2017

An analysis of recent studies and a field survey were conducted to investigate the distribution of the exotic species Ophraella communa LeSage (Coleoptera, Chrysomelidae) and the results' applicability for biological control against ragweed, which disturbs the island's ecosystem. The ragweed beetle (O. communa) can be found anywhere on the host plant Ambrosia artemisiifolia L., which grows in Jeju Island. Moreover, ragweed beetles possess the following characteristics: a high host plant specificity, a high-temperature resistance, an excellent mobility, and multivoltinism. Ragweed is extensively distributed and gradually expands its habitat further on Jeju Island. For this reason, it is recommended to take advantage of O. communa for the biological control of ragweed instead of pesticides or direct removal, considering that Jeju is endowed with many natural reserves and unique insular traits.

• Ecology and Resilient Infrastructure
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• v.10 no.4
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• pp.226-236
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• 2023

As climate change intensifies, the importance of studying plant phenology has increased, leading to a surge in research employing automated video recording devices like Phenocams. In this study, using the Phenocams operated by the National Institute of Ecology, we examined the trends in plant phenological changes across diverse ecosystem types in South Korea and analyzed their correlations with climate factors. The patterns of plant phenological changes varied by region and tree species. Pinus thunbergii and Pinus densiflora typically show an overall increase in their growth period, positively correlating with temperatures and precipitation during winter. However, uniquely, for Abies koreana on Hallasan Mt., a higher amount of precipitation in August leads to an earlier end of season (eos), and the correlation analysis with the recent phenomenon of dying A. Koreana seems necessary. beyond the analysis, solutions for handling missing data issues during the data collection process were proposed. Furthermore, to expand future research scope and encompass diverse ecosystem types, a suggestion to combine Phenocam research with satellite observations was presented.

• Korean Journal of Environment and Ecology
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• v.28 no.2
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• pp.197-204
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• 2014

The purpose of this study was to investigate the vegetation structure of Daphniphyllum macropodum community in the Yeong-sil and Seong-panack. To do so, 26plots ($(20m{\times}20m)$) were set up and surveyed. Plant communities were classified with 3 groups according to the analysis of classification by TWINSPAN and DCA Ordination; Pinus densiflora-Carpinus laxiflora (I), Carpinus laxiflora-Quercus serrata (II) and Carpinus tschonoskii (III). Daphniphyllum macropodum is appearing in understory and shrub layer of all groups. We found that Daphniphyllum macropodum will be dominated in understory and shrub layer. These results was judeged that these influence is depended on difference of altitude and accompanied species. Accompanied species were lived in similar growth environment to Daphniphyllum macropodum. That species were Styrax japonica, Quercus serrata of understory and Ilex crenata, Taxus cuspidata of shrub layer.

• Journal of The Geomorphological Association of Korea
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• v.20 no.4
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• pp.117-131
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• 2013

2010 eruption of Eyjafjallajokull volcano in Iceland and 2011 Shinmoedake's eruption in Japan evoked concerns from researchers for the possibility of explosion of Baekdusan volcano after long dormancy (repose period). National Emergency Management Administration has tried to evaluate the vulnerability of volcanic disaster and to prepare response to the potential risk and to mitigate the damages from the volcanic eruption, but a few studies have focused on the activities of Baekdusan. This study aims to clarify what the criteria between dormant volcano and active volcano based on geomorphologists' and geologists' researches. Volcanic experts have made a criterion of activeness such as the evidence of volcanic eruption within 10,000 year before present. More rigorous criterion which was made in 1991 by Japanese Meteorological Administration was 2000 years B.P. Both Baekdusan and Hallasan satisfy two criteria, so it is necessary for us to monitor the activity of both volcanoes and to reflect the facts into the curriculum.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.36-36
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• 2019

본 연구는 한라산국립공원 동사면에 위치한 구상나무숲 장기생태 모니터링 5ha 조사지역 ($20{\times}20m$, 125개 방형구)에서 구상나무의 유묘 및 치수 발생 현황을 파악하기 위하여 수행되었다. 조사는 2016년 6~8월 사이에 $5{\times}5m$ 방형구 125곳에 대해 계통추출법을 적용하여 실시하였다. 조사한 전체 125개 방형구 중에서 54개에서만 유묘가 관찰되었으며, 그 내용은 유묘 615개체 및 치수 1개체로 총 616개체가 발견되었다. 그러나 과반수의 71개 방형구에서 치수뿐만 아니라 유묘도 출현하지 않았다. 심지어 전체 125개 방형구에서 유묘가 가장 많이 관찰된 방형구(2-6지역, 95개체)를 제외하면, 나머지 124개 방형구의 평균 유묘 개체수는 4.2개로 매우 적었고 높이도 35cm 이하에 불과했다. 이와 함께 장기생태 모니터링 조사 지역 내에서 $1{\times}1m$ 방형구 183곳에 대해 단순 무작위 추출법으로 발생지 조사를 수행하였다. 발생지 조사 결과 유묘 2,518개체, 치수 2개체 및 유목 2개체 등 총 2,522개체가 발견되어 계통추출법을 적용한 조사와 유사한 결과가 나타났다. 본 연구를 통해 한라산국립공원 동사면 구상나무숲 내에서 구상나무 유묘의 발생은 어느 정도 이루어지고 있으나, 교란으로 인하여 치수로의 발달이 제한되는 것으로 판단된다. 여러 교란 요인 중에서 조사된 총 3,138개체 중 12.1%, 381개체에서 유제류인 노루에 의한 섭식이 확인되어 노루의 섭식이 유묘 발생 및 치수 발달에 교란을 야기하는 가장 중요한 요인으로 추정해볼 수 있다. 한반도 특산식물 구상나무의 보전 대책 수립을 위한 유묘 및 치수 교란 원인에 대한 지속적인 모니터링이 진행되어야 한다고 사료된다.