• 한국환경복원기술학회지
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• 제14권1호
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• pp.35-42
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• 2011

The current study analyzed appropriateness of abandoned rice paddy wetlands as habitats for the Amphibia by assessing functions and value of abandoned rice paddy wetlands within land development districts as a habitat for living creatures and researching into the Amphibia living in the subject districts. For this purpose, the study designated abandoned rice paddy wetlands within Hwaseong A District and Pangyo B District under land development as subject lands. Those wetlands went through succession after abandonment of farming. Detailed study results are as follows. From classification of wetland types and an analysis of their characteristics, it was found that herbaceous plants such as smartweed communities, horsetail communities and reed communities, and woody plants such as pussy willow communities appeared in both districts. These abandoned rice paddy wetlands shows typical characteristics of palustrine wetlands. As a result of a vegetation structure research, it was observed that succession has been progressed for at least over 2~3 years. In assessment of wetland functions by item, it was found that they are developing into fine wetlands in terms of functions because they are ranked over Moderate Class except separate distance from streams. Also from a research into animals living in the abandoned rice paddy wetlands, it was found that main inhabitants are Rana nigromaculata,Rana dybowskii, Hyla japonica, Bufo bufo gargarizans, etc. It can be confirmed that the abandoned rice paddy wetlands are providing appropriate conditions as habitats to the Amphibia in a view that those species have life cycles of inhabitation (shores and wetlands) - egg-laying (rice paddy, puddles and swampy places) - hibernation (rice field banks and swampy places). From this point of view, it was found that abandoned rice paddy wetlands that developed because of abandonment of farming can be used as means to improve structure and functions of habitats.

• Journal of Ecology and Environment
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• 제36권1호
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• pp.19-29
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• 2013

Cicuta virosa is an endangered species in Korea, which is a southern marginal area. To conserve and restore habitats of this plant, we investigated water and soil environmental characteristics and vegetation at four habitats during the growing season. The C. virosa habitats differed in community structure, water and substrate properties, and water regime. Although the total distribution ranges of the water and soil environments for C. virosa were wide and overlapped with the optimal environmental range of distribution of accompanying species, the optimal water level range for C. virosa was defined as $7{\pm}3.5$ cm. Water level was adjusted by substrate structure such as a mound of P. japonica and a floating mat comprised of accompanying species. A floating mat was an aid to maintain an optimal and stable water level in deep or fluctuating water and to prevent strong competition with prolific macrophytes. The GS sampling site, which had floating mats, could be a good model for C. virosa conservation in a warm temperate region, whereas the PC sampling sites, which experienced a water shortage in spring, provided a clue about the decline in C. virosa population size.

• 한국환경복원기술학회지
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• 제18권1호
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• pp.37-51
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• 2015

Sparganium japonicum Rothert. is designated as a near threatened species by the National Institute of Biological Resources and is restrictively distributed in South Korea. To conserve and restore habitats of this plant, we investigated environmental characteristics and vegetation at five habitats during the growing season. Thirty plant species from seventeen families were found in the S. japonicum community. The species frequently found in this community included Utricularia vulgaris, Potamogeton distinctus, Phragmites japonica, Cicuta virosa, Persicaria thunbergii, Phragmites communis, Hydrilla verticillata. Maximum height of this plant reached at August and average height at five habitats is 120 cm at this time. Water and soil environmental factors showed low values compared with that of other wetlands. S. japonicum lived in not only shallow water level but also deep water level. These results can be helpful for S. japonicum habitat conservation and restoration.

• 한국자원식물학회지
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• 제24권4호
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• pp.395-403
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• 2011

본 연구는 제주고사리삼 자생지의 입지환경과 식생 특성을 파악하기 위하여 이루어졌다. 각 자생지들은 자생지의 깊이, 암석 노출 비율, 우점 수종, 주변식생 등에 따라 2가지 유형으로 구분되었으며, 이에 따라 자생지의 식생이 다르게 나타났다. 암석이 노출된 유형의 자생지는 인접 지역과의 지형적인 경계가 뚜렷하고, 대부분 습한 환경에 자라는 수목으로 구성되어 있다. 이에 비해 토양이 풍부한 유형의 자생지는 깊이가 얕고, 토양이 발달되어 있으며 주변에서 이입된 수목이 분포하였다. 하지만, 초본층은 대부분 수생식물이 우점하며 이는 자생지가 습지의 특성을 갖는다는 것을 보여준다. 따라서 제주고사리삼 자생지는 소택지와 매우 유사한 특성을 가지며, 제주고사리삼의 보존을 위해서는 자생지가 이러한 습지의 특성을 유지하도록 하는 것이 매우 중요할 것이다.

• The Korean Journal of Ecology
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• 제12권3호
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• pp.133-144
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• 1989

The morphology and flowering time of two Suaeda japonica populations from different habitats, the creek and the bank of the mudflat in Sorae, were surveyed. And standard transplantation and reciprocal transplantation were carried out to determine whether their characteristics were genetically fixed or not. Also soil sample of these habitats were analyzed. The amounts of loss on ignition, maximum field capacity, total nitrogen, exchangeable calcium and potassium, and soluble phosphorus were found to be significantly different between two habitats. Leaf thickness, leaf width, leaf length, stem height number of branches, and number of seeds were significantly different between plants of two populations. And flowering times of two populations did not overlap. According to the results of transplantation, leaf width, leaf thickness, and flowering times were the same as those at their original habitat. But the stem lenght, leaf lenght, number of branches and unmber of seeds were not. Therefore, the differences in the leaf length, leaf thickness, and flowering time seemed to bo genetically fixed. It were suggested that the creek bank populations of Suaeda japoinica were to be considered as different ecotypes.

• 생약학회지
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• 제40권4호
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• pp.289-297
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• 2009

This study was carried out to investigate the ecological characteristic of native Lithospermum erythrorhizon population in Korea. The survey quadrates were located in the middle of native L. erythrorhizon habitats. As the result of the research, the ecological patterns of native habitats were found to be divided into inclined plane type, ridge type, mountain-roadside type, and rock bed type. The research revealed 90 taxa in total, in which 37 families, 63 genera, 23 varieties, 6 forma, 1 sub-species and 60 species were checked in the flora of native L. erythrorhizon habitats.

• 환경생물
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• 제20권1호
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• pp.66-72
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• 2002

한반도 동해 연안에 자생하는 거머리말의 종 내 형태적 변이의 한계를 파악하기 위하여 1998년 6월부터 8월까지 (동해 중부 화진포에서부터 남부 대변까지) 식물체를 채집 비교 분석하였다. 거머리말은 연안의 석호, 항구와 만의 다양한 생육지에서 출현하였다. 생체를 대상으로 형태학적 주요 형질은 직접 측정되었으며, 이들 자료로 형질의 상관관계, 주성분 분석과 군집분석을 하였다. 외부형질의 특징에 따라 거머리말은 단협엽형, 장광엽형의 두 그룹으로 구분되었으며, 엽두 형태는 원두, 둔두, 미요두, 소요두, 유두, 예두와 미철두로 각 생육지와 집단 내에서도 변이가 다양하게 출현하였다. 동해연안에 생육하는 거머리말의 군집들은 생육환경에 따라 식물체 크기와 외부형질 변이 폭이 큰 것으로 밝혀졌다.

• Journal of Ecology and Environment
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• 제38권3호
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• pp.343-352
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• 2015

The landscape setting of a habitat strongly influences the distribution, abundance, and species composition of waterfowl. Thus, habitat assessment is very important to understand the habitat characteristics that sustain waterfowl assemblages. In this study, we hypothesized that the excessive use of artificial materials when new wetlands are constructed negatively influences wintering waterfowl. To test this hypothesis, we measured environmental factors, assessed habitat, and investigated waterfowl at 13 artificial wetlands in the Nakdong River Basin. There were greater numbers of waterfowl species and individuals in artificial wetlands with high habitat assessment scores. In contrast, environmental factors did not affect waterfowl distribution. In particular, features of natural habitats, such as macrophytes and sandbars, and the surrounding land-use patterns were important factors for sustaining waterfowl assemblages in each created wetland. Our results show that promoting naturalness in wetlands and surrounding areas would increase the species diversity and abundance of waterfowl. Further, complex habitats, such as wetlands and some terrestrial habitats, support both aquatic and terrestrial species because mixed habitats feature a larger array of food sources than more limited habitats do.

• 한국환경과학회지
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• 제16권6호
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• pp.751-761
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• 2007

This study is carried out through ecological situation of native Bupleurum latissimum habitats and the research of environmental conditions for conservation of native sites, restoration of alternative habitats and preliminary data for application of useful medicinal plant. Native Bupleurum latissimum habitats were distributed on lower and middle part of the mountain from Altitude 54m to 185m, and the directions of slope were researched as usually northen and western slope. As a result of phytosociological research in 12 stands of native Bupleurum latissimum habitats, they were seperated to two communities(Bupleurum latissimum typical community and Bupleurum latissimum-Galium spurium community) in accordance with containable rate of the organic matter and soil hardeness. Soil condition is usually constituted as loamy sand and clay loam. Bupleurum latissimum is propagated in valuable soil conditions. Bupleurum latissimum lives with Morus bombycis, Reynoutria sachalinensis in Bupleurum latissimum typical community and Thalictrum aquilegifolium, Stellaria media, Hedera rhombea etc. is appeared with Bupleurum latissimum in Bupleurum latissimum-Galium spurium community. Especially, companion species were researched as Aster glehni, Dystaenia takeshimana and so on. The flora of vascular plants in this study is 44 families, 88genus 82species, 2 subspecies, 14 varietas, 4 forma and total 102 taxa. Plants of compositae occupied 10.78% among whole of them.

• 농업생명과학연구
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• 제52권6호
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• pp.163-173
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• 2018

본 연구는 환경부 멸종위기야생식물II급이자 한반도 고유종인 한라송이풀의 자생지 환경특성과 식물상을 조사하여 자생지 보전을 위한 기초자료를 제공하고자 수행되었다. 가야산 자생지는 해발 1,400m의 남서사면, 한라산 자생지는 해발 1,500m의 남동사면에서 출현하였으며, 두 자생지 모두 상층식생이 전무한 초지대에서 생육하는 것으로 조사되었다. 토양의 이화학성 분석결과 토양 pH는 4.93-6.48, 토양유기물함량은 4.4-8.1%로 나타났다. 조사구 내 출현식물은 총 27과 40속 43종 8변종 4품종 등 총 55분류군으로 조사되었고 가야산은 25분류군, 한라산은 37분류군이 확인되었다. 한라송이풀은 한반도 내 아고산지역에 잔존하는 북방계성 식물로 현재의 자생지는 주변식물의 피압에 의해 경쟁에서 지속적으로 밀려나 개체수가 급격하게 감소하고 있다. 따라서 자생지 보전 및 복원을 위하여 광도, 온도, 집단의 유전적 평가 등 다양한 인자를 포함한 종합적인 보전생물학적 연구가 요구된다.