• Korean Journal of Environment and Ecology
• /
• v.25 no.6
• /
• pp.819-827
• /
• 2011

Climate change is recognised as the best serious environmental problem in recent time, and high alpine or high latitudinal organisms especially endangered by its change. Leontice microrhyncha is recorded one of the endangered species by the Ministry of Environment Korea. We surveyed ten L. microrhyncha populations distributed at Taebaek Mountains, high mountain area in Kangwon province. L. microrhyncha is distributed 940m~1350m high altitude which equivalent of Warmth Index $53^{\circ}C{\cdot}month$ to $75^{\circ}C{\cdot}month$, the range of conspicuous cool temperate forest zone. The plant species distributed at slope of $5^{\circ}{\sim}23^{\circ}$ on northeast slopes. The vegetation structure at tree layer of L. microrhyncha distribution area is dominated by Quercus mongolica, Betula costata, Cornus controversa, Acer mono in tree layer, and by Staphylea bumalda, Deutzia glabrata, Stephanandra incisa in shrub layer. The species diversity of herb layer of each L. microrhyncha population showed from 0.21 to 0.98, and the importance value of L. microrhyncha in each population was the highest at blooming time of L. microrhyncha. These results will provide the basic information for the development of conservation strategies for this endangered species.

• Korean Journal of Ecology and Environment
• /
• v.50 no.4
• /
• pp.411-421
• /
• 2017

Understanding the need for temperature regulation, behavior, and ecology of hibernating bats provides the possibility of conservation and management for target species. Our objective in this study was to improve understanding of the population trend and ecological requirement in Myotis formosus population in South Korea. From 2007 to 2016, total of 58 hibernacula for Myotis formosus were found across the country. Of the 58 hibernating sites of Myotis formosus, 86% (n=49) were abandoned mines and 14% (n=8) were natural caves. During the survey period, 28 (5%) bats of total 570 bats were observed in natural caves (n=8) and 542 (95%) bats were observed in abandoned mines (n=49). The internal environments of hibernacula of M. formosus were highly stable despite dramatic variation in the external environment. Specifically, we examined the population trend of the endangered bat Myotis formosus in South Korea by long-term monitoring for hibernation sites. The population trend of endangered species M. formosus showed a marked stable in hibernating population. Our results indicate that a tightly collected long-term data set may help to establish the initial approximation of population trends and manage to threats for the endangered bat species.

• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 2003.05a
• /
• pp.259-260
• /
• 2003

분포가 확대되어 가고 있는 미국자공의 서식지 환경요인과 발아특성을 조사하였다. 그 결과 광의 구배에 따른 기온의 차는 없었으나, 지온의 일교차는 상대조도에 따라 아주 다르게 나타났다. 실생 출현은 100%에서 150개체가 출현하였고, 33%에서는 80개체가 출현하였지만 8%에서는 출현하지 않았다. 2002년 채집되어진 종자는 광조건에 관계없이 항온에서 거의 발아하지 않았으나 광조건하의 변온에서는 발아율이 70%, 암조건하의 변온에서는 25%의 발아율이 보였다. 미국자리공의 발아는 광조건보다 지온변화에 보다 직접적으로 영향을 받는 것으로 판단된다.

• Korean Journal of Ecology and Environment
• /
• v.53 no.2
• /
• pp.185-194
• /
• 2020

Pomacea canaliculate (channeled apple snail; CAS), which is one of the world's worst alien invasive species, is widely distributed in Korea, and raised ecological and economic problems. In this study, we surveyed the distribution and dispersal characteristics of CAS in Korea, and analyzed the effects of environmental and anthropogenic (or social) factors on their distribution and dispersal. We considered various events related to CAS such as changes of policy including promotion of agriculture using CAS and enactment of biological diversity conservation law. Our results showed that human activities strongly influenced to the distribution and dispersal of CAS in Korea. Distribution of CAS seemed to relate with environment-friendly agriculture considering environmental conditions of CAS habitats. And dispersal characteristics of CAS were significantly correlated with social factors such as cultivation area and rate of organic products, production CAS on inland fishery.

• Korean Journal of Environment and Ecology
• /
• v.25 no.4
• /
• pp.516-525
• /
• 2011

We studied the influence certain environmental factors (proximity of roosting site, roads, and residential areas) have on the spatial distribution of cranes in the Cheorwon, Korea. Using a range finder and GPS, data were collected from January to February 2007 and were subsequently evaluated with ArcGIS. The size of the cranes' wintering habitat was estimated to be 7$76.9km^2$. Five hundred and fifty-five flocks of cranes were observed and detailed distributions were collected. Feeding distribution of the cranes showed clustered distribution, however, no tendencies of spatial autocorrelation were apparent. Adjacent regions with paved roads and residences showed lower densities than other areas. Distances at which paved roads and residential areas induced changes in feeding flock densities were 1500m and 1750m, respectively. Feeding flock density decreased with increased distance from roosting site. Feeding flock density of the two crane species did not increase as distance from roads increased, however, the density of individuals showed a significant increasing tendency with increased distance from roads. In both species, density of feeding flocks and individuals significantly increased with increasing distance from residential areas. In Red-crowned Cranes, the density of feeding flocks and individuals significantly decreased with increasing distance from roosting site, however, in the case of White-naped Cranes, there was an even distribution in density of feeding flocks and individuals.

• Korean Journal of Ecology and Environment
• /
• v.49 no.2
• /
• pp.142-146
• /
• 2016

The purpose of this study is to evaluate topographic characteristics revealed in the predicted distribution areas of Aporia crataegi, according to climate change. Towards this end, this study compared the differences of topographic factors, such as altitude, mountain slope and the aspect of slope, in the distribution areas with different potential inhabitation possibilities of the Aporia crataegi. The inhabitation possibilities of the Aporia crataegi were different, according to altitude and topographic slope, and the inhabitation possibility is judged to be affected more by the topographic conditions including altitude and mountain slope than by the aspect of slope. Especially, the inhabitation possibility of the Aporia crataegi was higher in the higher altitude area, as time goes on furthermore. The reason is that the current climate environment, which is suitable for the potential inhabitation of the Aporia crataegi, is forecast to be formed with an area with high altitude. Although the difference in the aspect of slope was not statistically significant according to inhabitation possibility, the reason why the inhabitation possibility of the Aporia crataegi varies in the mainly southeast slope is conjectured to be derived from the warmer heat environmental condition to grow from a larva into an imago. The result drawn in this study is expected to be utilized as basic data to establish a policy soundly preserving and managing the habitat of biospecies in consideration of climate change and topographic conditions in the natural ecosystem field by using the already built up various biological resources information.

• Journal of Wetlands Research
• /
• v.9 no.3
• /
• pp.13-24
• /
• 2007

This study was conducted to confirm if spatial distribution of macrobenthic fauna were related with sedimentary characteristics. Sedimentary characteristics were compared in each community after carrying of community analysis based upon species composition. Macrobenthic animals were distinguished with 4 communities based on the tidal level, of which 3 communities were divided into two groups on the sediment composition. Common species which were presented in all communities, Nephtys californiensis Hartman 1938, Haploscoloplos elongatus Johnson 1901, Glycera sp., Heteromastus sp. Notomastus sp. Timarete amtarctica Mono 1930, Glysinde sp., Lumbrineris japonica Marenzeller 1879 were having different appearance densities at each community area caused by different sedimentary characteristics. But only two species among the common species have a correlation significantly. Temporal variation of common species could not be recognised because of 4 times of seasonal investigation was not enough know their life cycles. So, in the future more frequently sampling method should be required.

• Journal of Korea Water Resources Association
• /
• v.52 no.spc2
• /
• pp.791-799
• /
• 2019

This study explained the historical changes in the habitat structures based on the aerial photographs (1948, 1967, 1973, 1989 and 2010) of the mid-stream reach of the Mangyeong River. The habitat structure was divided into landforms and aquatic habitats. The landform was classified into bare land, vegetated land, water surface, farmland and artificial land. The aquatic habitat was classified into natural riffle, artificial riffle, run, head wando, tail wando, mid wando, pond and chute channel. The ratio of bareland decreased, and water surface and vegetated land increased after the excavation in 1970s and since the construction of weir in 1980s. As historical changes of aquatic habitat, ratio of run decreased sharply while mid wando increased sharply. aquatic habitats such as head wando, tail wando, and pond located on bars decreased dramatically.

• Korean Journal of Environmental Biology
• /
• v.35 no.3
• /
• pp.380-388
• /
• 2017

Factors affecting spatial distribution of halophytes were analyzed in June 2012 at the Goraebul coastal dunes. In the Goraebul sand dune, distribution of halophytes was divided into three groups. The first group belonging to Elymus mollis, Carex kobomugi, Calystegia soldanella, Ixeris repens and Glehnia littoralis was distributed in the ridge of primary sand dune and dune slack. The second group belonging to Lathyrus japonicus and Zoysia macrostachya was distributed in the dune slack. The third group belonging to Pinus thunbergii, Vitex rotundifolia and Linaria japonicus was distributed in the pine forest of the secondary sand dune. E. mollis, C. kobomugi, C. soldanella, I. repens and G. littoralis was distributed in relatively unstable habitat of sand dunes due to the large amount of sand movement. V. rotundifolia was distributed in a relatively stable habitat. Factors that have the greatest influence on distribution of halophytes in the Goraebul sand dunes are distance from the seashore, topography, and the pine forest. The Goraebul sand dune is a relatively well-preserved area with minimal human intervention. Therefore, different distribution of physico-chemical factors by natural processes is essential to spatial distribution of halophytes than other sand dunes in Korea. Significant natural processes in the Goraebul sand dunes were advance and retreat of coastlines from waves, erosion and sedimentation of sand due to wind and waves, and dispersal of seawater.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2020.08a
• /
• pp.3-3
• /
• 2020

최근 지구온난화로 인한 기후변화로 인해 지리적 분포가 한정적인 한반도 구과식물들은 점점 서식지 내 생육에 위협을 받고 있다. 이러한 구과식물의 지속이용가능한 보전을 위해서는 각 종별 형질 특성 및 분포, 생육정보 등의 기초정보 구축이 필요할 것이다. 구과식물(Pinidae, Conifers)은 전 세계적으로 나자식물(Gymnosperms)의 3/5정도인 630여분류군이 분포하는 것으로 알려져 있다(Farjon, 2008). 은행나무나 소철나무류 등 다른 나자식물과 비교하여 여러 복잡한 구조로 이루어진 구과(웅성, 자성 구과)를 형성하고, 잎은 대부분 바늘형으로 단순하며, 상록성인 특징 등으로 구분된다. 우리나라에 분포 및 식재되고 있는 나자식물 중 은행나무와 소철나무를 제외한 모든 나자식물이 구과식물에 속한다. 구과식물이 전 세계적으로 넓은 분포역을 갖지만, 종별로는 제한적인 분포를 갖는 것들이 많이 나타난다. 우리나라에 자생하는 구과식물 대부분도 동북아시아에만 분포하는 종들이 대다수이다. 한반도 구과식물은 총 5과 12속 23종 5변종 총 28분류군으로 확인되었다. 소나무과는 5속 12분류군으로 구상나무와 분비나무의 형태적 중복형질이 확인되었으며, 측백나무과는 3속 9분류군으로 눈향나무를 변종에서 종 수준으로 적용하였고, 어청도에서 해변노간주의 분포를 확인하였다. 개비자나무과는 1속 3분류군으로 수형에 따라 큰개비자나무, 눈개비자나무, 개비자나무로 구분하였다. 주목과는 비자나무속을 포함하여 2속 3분류군으로 설악눈주목에 대한 세부적인 분류학적 재검토가 필요할 것으로 판단한다. 나한송과는 1속 1분류군으로 신안군 가거도에서 나한송의 자생지를 확인하였다. 구상나무와 분비나무의 형태적 구분형질이 모호함에 따라 집단별 유전정보 분석을 통한 계통지리학적 연구를 수행하였다. 분석을 통해 구상나무는 빙하기에 북부지역의 조상종이 남하하여 분화되고, 후빙기에 중부지역까지 분포확장이 이루어진 것으로 판단된다.