• 한국환경생태학회지
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• 제21권1호
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• pp.47-54
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• 2007

본 연구는 광릉 지역의 활엽수 천연림과 도로 주변에서 서식지 구조와 조류군집의 특성을 파악하기 위해 2005년 10월부터 2006년 8월 사이의 기간 동안 수행되었다. 활엽수 천연림과 도로 지역의 서식지 환경은 매우 큰 차이가 있는 것으로 나타났다. 활엽수 천연림은 대경목의 비율이 높고 상층 임관이 잘 발달해 있는 반면, 도로에서는 소경목이 대부분을 차지하였으며, 상층임관의 발달이 적은 반면 하층식생의 피도가 높았다. 계절별 조사 결과 활엽수 천연림에서는 모두 37종의 조류가 관찰되었으며, 도로에서는 20종이 기록되었다. 4계절에 있어서도 활엽수 천연림 이 도로보다 관찰 종수, 개체수 및 종다양도에 있어서 모두 높은 것으로 나타났다. 또한 길드 구조에 있어서도 활엽수 천연림 지역에서는 수관층 및 수동(나무구멍)에서 먹이와 둥지를 얻는 조류들이 많이 관찰되었으며, 도로에서는 관목이나 지면을 이용하는 조류가 많이 기록되었다. 두 지 역은 인접해 있음에도 불구하고 조류 군집의 특성에 있어서 큰 차이를 보였다. 이러한 차이는 두 지 역 간 서식환경의 차이와 깊은 연관이 있는 것으로 판단된다.

• 한국환경생태학회지
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• 제11권4호
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• pp.433-449
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• 1998

설악산국립공원 장수대에서 한계령에 이르는 자양천지역의 식물군집구조를 조사하기 위하여 62개 조사구(1개 조사구당 100m$^2$)를 설정하고 식생조사를 실시하였다. 62개 조사구는 DCA 분석을 통하여 6개 군집(소나무-황철나무군집, 소나무군집, 소나무-낙엽활엽수군집, 신갈나무군집, 신갈나무-까치박달군집, 까치박달-낙엽활엽수군집)으로 분류되었으며, 신갈나무군집, 신갈나무-까치박달군집, 가치박달-낙엽활엾군집은 해발고 755m 이상에 분포하였고, 나머지 군집은 그 아래에 위치하였다. 해발고 755m 이상의 군집은 신갈나무에서 까치박달로 천이가 진행되고 있거나. 까치박달과 낙엽활엽수가 서로 경쟁하고 있었다. 해발고 500~560m 지역은 소나무군집이었으나, 장기적으로 낙엽활엽수군집으로 촌이가 진행될 것이다.

• 한국토양비료학회지
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• 제40권2호
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• pp.136-144
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• 2007

본 연구는 낙엽활엽수림과 낙엽송 조림지에서 양분 유입의 차이를 알아보고자 강원도 평창군에 위치한 중왕산 지역에서 임내강우와 임외강우, 낙엽낙지에 의한 양분 유입량과 토양수 내 양분 농도를 조사하였다. 조사 기간동안 연평균 강우 차단율은 낙엽활엽수림에서 12%, 낙엽송 조림지에서 36%로 낙엽송 조림지에서 높았다. 수관통과우 내 양이온 농도는 차이를 보이지 않았으나, 음이온 농도는 낙엽송 조림지에서 더 높았으며, 수간류에서는 $Cl^-$ 이온이 낙엽송 조림지에서 높았으며, 다른 이온은 차이를 보이지 않았다. 수관통과우와 수간류에 의한 양분 유입량은 $Cl^-$ 이온을 제외한 다른 이온들의 유입량이 낙엽송 조림지보다 낙엽활엽수림에서 더 많았다. 토양수 내 이온 농도는 A층에서는 $Cl^-$, $NO_3{^-}$, $SO{_4}^{2-}$ 이온이, B층에서는 $Ca^{2+}$, $Cl^-$ 이온이 낙엽송 조림지에서 다소 높았다. 연간 낙엽낙지량은 낙엽활엽수림에서 $2,589kg\;ha^{-1}$로, 낙엽송 조림지의 $1,046kg\;ha^{-1}$보다 많은 유입량을 보였다. 낙엽낙지내 이온 함유량은 N의 경우 낙엽송 조림지와 낙엽활엽수림에서 각각 1.6%와 1.1%로 낙엽송 조림지에서 더 높았으나, 양이온 함량은 낙엽활엽수림에서 더 높았다. 낙엽낙지에 의한 양분 유입량은 N의 경우, 낙엽활엽수림에서 $36.81kg\;ha^{-1}yr^{-1}$, 낙엽송 조림지에서 $16.16kg\;ha^{-1}yr^{-1}$였으며, 양이온의 유입량 역시 낙엽활엽수림에서 많았다. 이를 종합해 볼 때, 본 연구에서 수관통과우와 수간류 및 낙엽낙지에 의한 양분유입량은 낙엽활엽수림에서 더 많은 것으로 나타났다.

• 대한소아치과학회지
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• 제24권1호
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• pp.173-178
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• 1997

As one of the developmental disturbances in shape of teeth, an accessory root may involve any teeth, but has very rare frequency in the deciduous teeth. Because it is possible to diagnose the accessory root only by use of the radiographs, it is important to detect this root early by carefully examining the radiographs. The accessory root produces several problems such as abnormal exfoliation of deciduous teeth, eruption abnormality of successive permanent teeth, infection due to residual root during tooth extraction, and incomplete pulp treatment, and therefore it is necessary to have a continuous follow check-up to prevent these problems.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.586-589
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• 2004

A numerical algorithm using the Method of Moments (MoM) is introduced to compute precisely the scattering matrices of very thin deciduous leaves in this paper. At first, a dyadic Green's function was formulated and an integral equation for a volumetric current distribution in a lossy dielectric body. Then, the MoM was applied to the scattering problem with a specific technique to handle the numerical poles. The accuracy of the numerical technique was verified by examining the technique with various ways, and used to examine the validity regions of the classical analytical models.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.200-202
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• 2002

This study was for comparisons of transitional element concentrations from the two different soil, serpentinite(SP) and granite area(GR), Kwangcheon and Hongseong area. Soils were collected by soil depths (10, 20 and 30cm) from the sites selected In the plant species(coniferous and deciduous species). In the soils, the SP was high in the Cr, Mn, Fe, Co, Ni and Zn concentrations, while the GR was high in the Cu, As, Sc and V. With the soil depths, the elements had high solubility, such as Cr, Co and Ni concentrations, were high in the SP, while the other elements were not clear. For the both species, the SP was high in the root and bolebark, while in the GR, not clear. Coniferous species in the same soil types, was higher than the deciduous In most elements. The more with increasing ages, the more with element accumulation in most plant parts except leaves. Comparisons between the soils and plant species, in the case of the element contents within the soils, the plant species in the same sites was similar trend. especially, clear in the SP

• 한국자원식물학회지
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• 제7권1호
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• pp.35-44
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• 1994

The seasonal flower, leaf and fruit color characterlstics of deciduous woody landscape plants were investigated through the field survey in Suwon, Korea from January 1, 1992 toMarch 20, 1993.The results were as follows ;1. There were 12 cases in the combination of leaf spreading, anthesis, deblossom, fruit coloring,fruit falling, fall foliage coloring and leaf falling of deciduous woody landscape plants(163 spe-cies) investigated. And species of the leaf spreading, anthesis, deblossom, fall foliage coloringand leaf falling were 71(43.9%). And species of the leaf spreading, anthesis, deblossom,fruit coloring, fall foliage coloring, leaf falling and fruit falling were 40(24.5% ).2. The total continuing period of the flowering, fall foliage coloring and fruit coloring of decid-uous woody landscape plants(79 species) investigated varied from 2 months to more than 9months. And the species over 3 months below 4 months were 23(29.2%).3. There were 24 cases in the combination of color of flower, fall foliage and fruit of deciduouswoody landscape plants(79 species) investigated. And the species of the white flower, red fall fo-liage and red fruit were 16(20.3% ).

• Journal of Plant Biology
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• 제33권3호
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• pp.159-168
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• 1990

The occurrence and distribution of cellular slime molds in major deciduous forests of South Korea were investigated. Ten species were isolated from the soils collected at ten sampling areas and cultured in hay infusion agar with E. coli. These include: Dictyostelium minutum Raper, Dictyostelium mucoroides Brefeld, Dictyostelium lacteum Van Tiegham, Dictyostelium polycephalum Raper, Dictyostelium fasciculutum Traub, Hohl and Cavender, Dictyostelium sp. Polysphondylium pallidum Olive, Polyshpondylium violaceum Brefeld, Copromyxellar sp. and Guttulinopsis vulgaris Olives. Among these species, Dictyostelium sp. and Copromyxellar sp. could not be identified. D. minutum and D. mucoroides occurred the most frequently in almost all the deciduous forests investigated in this study. Dictyostelium sp., D. fasciculutum and Copromyxella sp. occurred only in the north of the central region, but D. lacteum and D. polycephalum were found only in the south of that region. This indicates that distribution of these species may be affected by climate. The number of isolates per sampling site ranged from 2 to 6, averaging 4.3.

• 한국산림과학회지
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• 제95권5호
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• pp.580-584
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• 2006

This study was conducted to clarify the characteristics of breeding bird communities between deciduous and coniferous forests from April to June 2005 in Mt. Namsan, Seoul, Korea. Two 10ha areas were selected for territory mapping of breeding bird communities. Number of breeding bird species, pairs,density and bird species diversity index were higher in deciduous forest with increasing amount of foliage in the forest profile or as forest structures developed compared with coniferous forest. The number of in coniferous forest. The differences in habitat structure between both study areas are very likely to have influenced how breeding birds used the available habitat. Forest structure and its interactions with birds should be consideration in forest management for birds and their habitat.

• 대한원격탐사학회지
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• 제20권1호
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• pp.39-46
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• 2004

The generalized Rayleigh-Gans (GRG) approximation is usually used to compute the scattering amplitudes of leaves smaller or comparable to a wavelength, while the physical optics (PO) approach with the resistive sheet approximation is commonly used for leaves larger or comparable to the wavelength. In this paper, the scattering amplitudes of an elliptical leaf are computed using those theoretical scattering models (GRG and PO) at different frequencies. The accuracies of the analytical models for microwave scattering from deciduous leaves are investigated by comparison with the precise estimation by the method of moment (MoM). It was found that both the PO approach and the GRG approximation can be used alternatively for computing the scattering matrices of natural deciduous leaves at P-, L-, C- and X-band frequencies.