• 한국패류학회지
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• 제25권3호
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• pp.231-236
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• 2009

This study describes biological environmental characteristics in natural habitats of Haliotis diversicolor in the coastal area of Sungsanpo located in the eastern coast of Jeju-do, Korea. The field survey was monthly conducted from May 2006 to February 2007. H. diversicolor, sea urchin, turban shell and marine algae were collected by two divers using SCUBA. The species composition of demersal fishes were seasonally investigated by fish traps in 2007. During the study period, more than 67% of H. diversicolor and sea urchin were found in the depth shallower than 5 m, and more than 64% of turban shell were found in the depth deeper than 3 m. The dominant algal species in May were generally Undaria pinnatifida, Ecklonia cava, Sargassum. spp. and coralline algae. Most of demersal fishes collected by the fish traps were wrasses which have been reported as a major predator of young abalone.

• 원예과학기술지
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• 제17권4호
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• pp.497-499
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• 1999

한라산을 중심으로 새우란(Calanthe discolor)은 해발 120~600m 범위에서, 금새우란(C. sieboldii)은 300~600m에서 분포하였고, 왕새우란(C. bicolor)은 해발 300~400m의 범위에서 새우란과 금새우란이 동시에 분포하는 지역에서만 분포하였다. 엽(葉)과 화기(花器)의 형태적인 면에서 새우란이 가장 작았고 금새우란이 가장컸으며, 왕새우란은 그 중간형태를 나타내었다. 화색(花色)에서는 새우란은 적갈색 계통의 꽃잎과 흰색의 설판과 같은 단순한 색상을 나타내었고, 금새우란은 노란색계통만을 나타내었다. 반면 왕새우란은 두 종의 색이 혼합된 다양한 화색을 나타내었다. 따라서 왕새우란은 새우란과 금새우란의 자연 교잡에 의해 출현된 새로운 종으로 사료된다.

• Journal of the korean society of oceanography
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• 제39권1호
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• pp.107-118
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• 2004

A series of mesocosm experiments has been conducted to investigate the effects of sediment on the qualities of superficial water over the tidal flats. The experiments involved two different kinds of sediments (Silt and Fine Sand) to mimic the natural habitats. Other environmental conditions in the mesocosm were kept as natural as possible. The mesocosm coincided with the annual patterns of the natural water qualities and was identical with the composition of benthic organisms of three reference sites of natural tidal flats. DIP has been leached out from sediment from June to October, but not for ammonium and DIN. The mesocosm was successfully able to simulate the environmental situations of natural tidal flat and will be a useful tool to assess the environmental impacts by human activities.

• 대한수의학회지
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• 제31권4호
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• pp.515-518
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• 1991

A field study of Lymnaea viridis, the intermediate host of Fasciola hepatica, was carried out in the eastern Chonnam area. The snail was distributed all over the place. Their major habitats were rice paddies (60.8%), followed by brooks (23.2%), irrigation canals (8.6%), and drains (5.6%). Other minor habitats included natural ponds (1.5%), lakes (0.4%), and rivers (0.1%). L. viridis was living in wet clay soil, occasionally entering water. The snails discharged egg masses when the temperature was $15{\sim}20^{\circ}C$, and the number of the snails was the highest late in October. At $9^{\circ}C$ the snails were not found on the mud: they were present deep in water or at the base of rice stubbles. These hibernation sites were discussed with the epidemiology of fascioliasis.

• 국제초고층학회논문집
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• 제1권2호
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• pp.117-123
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• 2012

This paper discusses major strengths of tall buildings that distinguish them as sustainable solutions for the built environment. It sheds light on some of the key attributes of tall buildings as well as materials and technologies that could boost their performance environmentally, economically and technically as well as the natural habitats containing them. Tall buildings are portrait as major successful options for accommodating the ever increasing urban world population, with little negative impact on ecologies and environmental habitats worldwide. The role of tall buildings as 'vertical garden sub-cities' mitigating modern city problems of 'urban heat islands' and sprawling cities is explored. A few building examples as well as city developments are presented which represent the new generation of sustainable tall buildings that are setting trends for future projects incorporating innovations in materials and building systems and designs.

• Journal of Species Research
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• 제10권4호
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• pp.356-363
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• 2021

Heterotrophic nanoflagellates (HNFs, 2-20 ㎛ in size) are substantially capable of controlling bacterial abundance in aquatic environments, and microbial taxonomists have studied ecologically important and abundant HNFs for a long time. However, the classifications of HNFs have rarely been reported in Korea on the basis of morphology and 18S rDNA sequencing. Here, previously reported five HNFs from non-Korean habitats were isolated from Korean coastal seawater or intertidal sediments for the first time. Light microscopic observations and 18S rDNA phylogenetic trees revealed that the five isolated species were Cafeteria burkhardae strain PH003, Cafeteria graefeae strain UL001, Aplanochytrium minuta (formerly Labyrinthuloides minuta) strain PH004, Neobodo curvifilus strain KM017 (formerly Procryptobia sorokini), and Ancyromonas micra (formerly Planomonas micra) strain IG005. Being morphologically and phylogenetically indistinct from its closest species, all isolates from Korea were therefore regarded as identical species detected in other countries. Thus, this result indicates an expansion of known habitats that range from those of the five isolates in natural ecosystems on Earth.

• 원예과학기술지
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• 제16권1호
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• pp.30-32
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• 1998

경기도 북부 및 강원도 산악지대에 많이 분포되어 있는 복주머니란의 자생지 생육 환경을 파악하여 재배화를 위한 기초자료로 활용하고자 본 실험을 실시하였다. 복주머니의 자생지의 연평균기온은 $14^{\circ}C$이며, 기온이 가장 낮은 시기는 1월로써 $-7^{\circ}C$었으며, 8월에는 $28^{\circ}C$였다. 자생지의 연평균 저온은 $10.9^{\circ}C$이였으며, 1월에 최저 $-4^{\circ}C$를 나타내었다. 양지에서의 광도는 3월과 5월 사이에 48,000 lux~51,433 lux였으며, 7월에 11,500 lux로 가장 낮았다. 한편 음지에서는 7월과 8월에 광도가 급격히 떨어져 470~865 lux범위로 매우 낮았고, SPAD값은 7월에 34.3으로서 년중 가장 높았다. 자생지 토양 산도는 pH 5.6~5.8 범위이며, 토양수분은 16.4 %~36.2%이었고, 6월에 36.2%로 가장 높았다.

• Journal of Ecology and Environment
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• 제47권3호
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• pp.63-74
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• 2023

Background: Comparing with the several types of infrastructures, linear infrastructures are known to facilitate the spread of undesirable species in ecosystems. Recently, some new man-made habitats (e.g., gravel pads of the high-voltage towers, solid wastes and sewage habitats) were established along the Deltaic Mediterranean coast of Egypt as a result of the construction of the E-W coastal international highway. The current study evaluates the floristic composition associated with the pads of high-voltage towers that had been constructed for stabilizing the power line towers in the North Nile Delta. Plant cover was measured for 22 randomly stand. Results: Eighty-four species were recorded, of which 35 are perennials (41.6%), 2 biennials (2.3%) and 47 annuals (56.0%) belonging to 23 families. The largest families were Asteraceae (16 species), Poaceae (15 species), Chenopodiaceae (12 species), and Fabaceae (7 species). Ten aliens (10.7%) out of the 84 species were recorded. Therophytes have the highest percentage (58%), followed by hemicryptophytes (14%), chamaephytes (11%). Six vegetation groups were recognized in the study area after the application of two way indicator species analysis (TWINSPAN), Arthrocnemum macrostachyum, Phragmites australis, and Mesembryanthemum nodiflorum have the highest presence percentage. Both of Salsola cyclophylla and Solanum villosum were recorded for the first time in North Nile Delta. Natural habitat had the highest α-diversity, but the lowest β-diversity (4.9, 15.4), while gravel pads had the reverse (2.7, 30.8). Some species which are native to the desert habitats (e.g., Rumex pictus, Salsola kali, and Carthamus tenuis) were able to invade the North Nile Delta. Conclusions: Habitat of gravel pads is an expressing form about the intense of disturbance in Deltaic Mediterranean coast of Egypt. More of efforts should be carried out to avoid more human disturbances that creating as ruderal habitats which open the gate to invasive species in the flora of North Nile Delta.

• The Korean Journal of Ecology
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• 제27권4호
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• pp.239-244
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• 2004

In this review, we present the results of our ten years of study on beef cattle production as a means of preserving phytodiversity and landscape in the semi-natural grasslands of the Aso region of Japan. There are about 16,000 ha of semi-natural grasslands in the region. The grasslands are maintained for animal production through such activities as grazing, mowing, and controlled burning. The Shannon's diversity index values, as measured in the present study, were higher in the grazed sites than in the abandoned sites. The grazing activities thus seem to create suitable habitats for coexisting herbaceous species. The grassland grazed moderately over a long term was able to sustain more animals than the grassland unused over a long term.

• Water Engineering Research
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• 제2권1호
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• pp.33-48
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• 2001

For the design of suitable aquatic habitats and habitat management purposes, sensitive descriptors for aquatic areas were identified and analyzed. The classification system of the aquatic areas were developed for natural streams and modified streams in Korea. Relationships among the descriptors of an aquatic area such as channel width, meander wave length, and arc angle have been defined. The analysis indicates that the total mean sinuosity is 1.25 for the main channels of natural streams, whereas the mean value of the sinuosity of modified streams is 1.14. The mean values of the total area, the width, and the length for the sandbars of natural streams are larger than those of modified streams.