• 한국환경복원기술학회지
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• 제15권4호
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• pp.61-80
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• 2012

This study is to offer the basic data for restoration and conservation of wetland ecosystem by surveying and analysing the flora distributed in the Binae marsh, Namhan River, Chungju-si. The flora in the Binae marsh were verified 204 taxa including 48 families, 152 genera, 179 species, 23 varieties and 2 forms. In flora, pteridophyta were 2 taxa including 1 family, 1 genus and 2 species, among angiospermae, dicotyledonae were 153 taxa including 37 families, 110 genera, 138 species, 13 varieties and 2 forms and monocotyledonae were 49 taxa including 10 families, 41 genera, 39 species and 10 varieties. In the result of classifying the life form of flora, megaphanerophytes (M), nanophanerophytes (N) and chamaiphytes (Ch) were each 9 taxa (4.4%), 37 taxa (18.1%) of hemicryptophytes (H), 19 taxa (9.3%) of geophytes (G), 97 taxa (47.6%) of therophytes (Th) and 24 taxa (11.8%) of hydrophytes (HH). The rare plant designated by Korea Forest Service was 1 taxa (Aristolochia contorta), and the endemic plant was 1 taxa (Salix koriyanagi) too. The specific plants by floristic region were 6 taxa. From among these, the species of degree I were 5 taxa including Salix chaenomeloides, Aristolochia contorta, Artemisia selengensis, Cirsium pendulum and Vallisneria natans, and degree III was 1 taxa including Alisma orientale. The naturalized plants were 45 taxa and the invasive alien plants were 3 taxa including Sicyos angulatus, Ambrosia artemisiifolia and Ambrosia trifida. The naturalized index (NI) was about 22.1%, 16.1% of urbanized index (UI) and 27.3% of disturbed index (DI). The extinct species by construction were 17 taxa including Persicaria sagittata, Typha orientalis, Zizania latifolia and so forth. The new-occured species were 14 taxa including Brassica juncea, Thlaspi arvense, Carduus crispus and so forth. The important species among the extinct species were Aristolochia contorta, Alisma orientale and Vallisneria natans.

• 한국환경복원기술학회지
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• 제14권5호
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• pp.17-35
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• 2011

The purpose of this study is to offer the raw data for management and conservation of national park by systematic and objective surveying and analysing the flora distributed in the Hwarang district, Gyeongju national park. The results are as follows. The vascular plants in this site were summarized as 396 taxa: 95 families, 272 genera, 351 species, 2 subspecies, 38 varieties and 5 forma. The rare plants designated by Korea Forest Service were 5 taxa: Exochorda serratifolia S.Moore, Potentilla discolor Bunge, Prunus yedoensis Matsum, Lysimachia coreana Nakai and Inula salicina var. asiatica Kitam.. The korean endemic plants were 6 taxa: Populus tomentiglandulosa T.B.Lee, Clematis trichotoma Nakai, Lespedeza maritima Nakai, Lysimachia coreana Nakai, Forsythia koreana (Rehder) Nakai and Weigela subsessilis (Nakai) L.H.Bailey. The specific plants by floristic region were 30 taxa: Asplenium sarelii Hk., Salix chaenomeloides Kimura, Lysimachia barystachys Bunge, Achillea alpina L., Celtis aurantiaca Nakai, Vitex negundo var. incisa (Lam.) C.B.Clarke and so forth. The plants with approval for delivering oversea were 6 taxa: Clematis trichotoma Nakai, Exochorda serratifolia S.Moore, Glycine soja Siebold & Zucc., Lespedeza maritima Nakai, Lysimachia coreana Nakai and Weigela subsessilis (Nakai) L.H.Bailey. The naturalized plants were 49 taxa: Bilderdykia dumetora (L.) Holub, Descurainia pinnata Britton, Oxalis corymbosa DC., Bidens frondosa L., Panicum dichotomiflorum Michx. and so forth. The invasive alien plants were 2 taxa: Ambrosia artemisiifolia L. and Aster pilosus Willd. In future, if we will survey the flora of whole Gyeongju national park, we will offer the help to establishing the conservation plan of ecosystem in Gyeongju national park.

• 한국환경복원기술학회지
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• 제19권3호
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• pp.93-102
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• 2016

An invasive disturbance species has caused harm to biodiversity and ecosystem. To address the issue, identifying the characteristics of a habitat for invasive disturbance species is considered for forest management. This study analyzed a status of plant species by field survey based on belt transect method in the capital areas and established a predictive model for invasive disturbance species by logistic regression. As results of the study, the number of herb, vine, and invasive disturbance species and a canopy cover of tree would decrease from the forest edge to core areas (p<0.001). The predictive model was derived with variables of altitude, Topographic Wetness Index, distance to forest edge, and canopy cover of tree. It can be useful in estimating the presence or absence of species and predicting its spatial distribution. Further studies are needed to identify the pathway of introduction, spread, and possibility of germination for understanding the status of invasive disturbance species in more depth.

• Ecology and Resilient Infrastructure
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• 제7권3호
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• pp.145-159
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• 2020

습지는 교란에 의해 주변 유역으로부터 과잉수, 퇴적물, 영양염, 기타 오염물 등이 축적되는 흡수원으로서 기능하기 때문에 외래종에 의한 생물학적 침입에 취약하다. 본 연구는 내륙습지 유형에 따른 외래식물의 출현현황 및 특성을 파악하기 위하여, 생태우수습지 24개소를 대상으로 유형을 분류하고 외래식물상을 분석하였다. 조사 대상 습지에서 발견된 외래식물은 총 130종으로 출현 식물 총 종수의 11%를 차지하였다. 이 중 국화과가 40종으로 가장 많았으며, 출현빈도가 높은 종은 개망초와 달맞이꽃이었다. 습지 유형별로는 하천형과 호수형 습지에서 평균 30종 내외로 평균 10종 미만인 산지형 습지보다 외래식물 종풍부도가 높은 것으로 나타났다. 인위적인 간섭정도를 나타내는 귀화율, 도시화지수, 일·이년생 비율에서도 동일한 결과가 나타났다. 군집분석에서는 하천형 습지와 호수형 습지가 혼재되었으며, 산지형 습지만 별도로 분리되었다. 산지형 습지는 외래종수가 현저하게 적은 것은 물론 다른 습지 유형에서 발견되지 않은 주걱개망초, 컴프리, 나도닭의덩굴의 영향으로 판단된다. 특히 미국쑥부쟁이, 돼지풀, 가시박, 단풍잎돼지풀 등 생태계교란생물은 하천형 습지에서 집중적으로 발견되었다. 따라서 인위적인 간섭강도가 높은 하천형 및 호수형 습지에서 외래식물 확산 요인을 고려한 체계적인 관리가 시급한 것으로 판단된다.

• 한국환경복원기술학회지
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• 제26권2호
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• pp.25-46
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• 2023

The purpose of this study was to present the ecologically important data for conservation and management of river ecosystem. Namcheon Stream, the study site, is a local river flowing from the east to the west of Gyeongju. The results are as follows. The numbers of vascular plants were summarized as 518 taxa including 98 families, 321 genera, 467 species, 9 subspecies, 32 varieties, 4 forms, 4 hybrids and 2 cultivars. The rare plants were 4 taxa including Aristolochia contorta, Koelreuteria paniculata, Hydrocharis dubia and Sparganium stoloniferum. The Korean endemic plants were Populus × tomentiglandulosa, Salix koriyanagi, Lespedeza maritima, Weigela subsessilis and Hemerocallis hakuunensis. The floristic target species were 27 taxa including 2 taxa of grade IV, 4 taxa of grade III, 7 taxa of grade II and 14 taxa of grade I. The invasive alien plants were 92 taxa including Pterocarya stenoptera, Conyza canadensis, Vulpia myuros and so on. The ecosystem disturbing species were 6 taxa including Rumex acetosella, Sicyos angulatus, Solanum carolinense, Ambrosia artemisiifolia, Lactuca seriola and Symphyotrichum pilosum.

• 한국자원식물학회지
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• 제36권4호
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• pp.264-274
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• 2023

본 연구는 제주지역에서 대량 발생하고 있는 생태계 교란 외래식물을 기능성 바이오소재로서의 이용 가능성을 확인하기 위한 연구의 일환으로서, 5종 외래식물체의 70% 에탄올 추출물을 대상으로 항산화, 항염증 및 항균 효과와 유효성분을 조사하였다. 외래식물의 총 폴리페놀 및 플라보노이드 함량은 애기수영 > 서양금혼초 ≥ 가시상추 > 환삼덩굴 ≥ 왕도깨비가지 순서로 나타났다. 외래식물의 DPPH 및 ABTS 라디칼 소거능 역시 애기수영에서 가장 높았으며, 항산화 효과는 식물 추출물의 총 폴리페놀 및 플라보노이드 함량과 연관된 것으로 확인되었다. LPS로 자극시킨 RAW 264.7 세포에서 외래식물체 에탄올 추출물(100 ㎍ SE/mL)의 NO 및 PGE₂ 생성 억제 효과는 각각 약 20~60%와 10~70%로 나타났고, 애기수영 및 환삼덩굴이 다른 3종에 비해 우수한 것으로 나타났다. 4종의 식중독 유발 미생물 및 5종의 구강 미생물을 대상으로 식물 추출물의 항균 효과를 조사한 결과, 환삼덩굴, 애기수영 및 왕도깨비가지의 에탄올 추출물은 B. subtilis, E. coli, V. parahaemolyticus 및 V. vulnificus 4종 식중독균 모두에 대해 강한 항균 활성을 보였다. 구강충치 유발 미생물인 E. faecalis, L. casei, R. dentocariosa, S. epidermidis, S. mutans에 대한 항균 효과는 환삼덩굴 추출물이 효과적이었으며, 항균 활성에 관여하는 주 유효성분은 pentadecylic acid, palmitic acid, clionasterol 등인 것으로 예측되었다. 이상의 결과는 생태계 교란 외래식물, 특히 애기수영 및 환삼덩굴의 기능성을 갖는 유효성분 분리 및 이용화 연구에 중요한 기초자료가 될 것이며, 항산화, 항염증 및 항균제 개발을 위한 바이오소재 발굴 등에도 중요한 정보를 제공할 수 있을 것으로 사료된다.

• Journal of Ecology and Environment
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• 제44권2호
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• pp.90-97
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• 2020

Background: Natural forests are generally considered to be less prone to biological invasions than other modified ecosystems, particularly when canopy cover is high. Few decades of management of degraded forests by local communities in Nepal has increased canopy cover and altered disturbance regimes. These changes might have reduced the abundance of invasive alien plant species (IAPS) in forests. To understand the status of IAPS in such forests, we studied two community managed Shorea robusta forests (Sundari and Dhusheri) of Nawalpur district in central Nepal. In these two forests, vegetation sampling was done using circular plots 10 m radius at forest edge, gaps, and within canopy. Variation of IAPS richness and cover across these microhabitats were compared, and their variation with tree canopy cover and basal area analyzed. Result: Altogether 14 IAPS were recorded in the study forests; among them Chromolaena odorata, Ageratum houstonianum, and Lantana camara had the highest frequency. Mikania micrantha was at the early stage of colonization in Sundari Community Forest (CF) but absent in Dhuseri CF. Both IAPS cover and richness was higher at forest edge and gap than in canopy plots and both these attributes declined with increasing canopy cover and tree basal area. Conclusion: The results indicate that increase in canopy cover and closure of forest gaps through participatory management of degraded forests can prevent plant invasions and suppress the growth of previously established IAPS in Shorea robusta forests of Nepal. This is the unacknowledged benefit of participatory forest management in Nepal.

• Ecology and Resilient Infrastructure
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• 제2권3호
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• pp.206-215
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• 2015

기후변화에 따른 침입외래식물의 잠재적 분포지를 예측하는 것은 하천과 저수지에서 생물다양성 보전과 생태적 관리를 위하여 중요하고 해결해야 할 과제이다. 본 연구에서는 한반도에서 털물참새피 (Paspalum distichum var. indutum)의 잠재적 미래 분포에 미치는 기후변화의 영향을 파악하였다. 털물참새피는 담수생태계의 수변에서 심각한 경제적, 환경적 영향을 미치는 침입 초본식물이다. 현재와 미래의 기후에서 털물참새피의 잠재적 분포를 추정하기 위하여 Maxent 모델을 적용하였다. 기후변화의 영향을 파악하기 위하여 현재 기후 자료로서 Worldclim 1.4의 19개 기후 변수를 사용하였고, 미래의 기후 자료로서 RCP 2.6와 RCP 8.5 시나리오에 따라서 HadGEM2- AO에 의하여 예측된 기후 변수를 사용하였다. 예측된 털물참새피의 현재 잠재분포지는 실제 위치 자료와 거의 일치하였다. 이 식물의 잠재 분포에 영향을 미치는 환경 변수는 가장 따뜻한 분기의 강수량, 연평균기온 및 가장 추운 분기의 평균기온이었다. 2050년에 기후변화에 따른 털물참새피의 분포 예측에 의하면 이 식물의 현재 분포지에서는 기후 적합성이 대체로 감소하였고, 이 식물이 보다 내륙과 북쪽으로 분포지가 확대되었다. 본 연구에서 사용한 예측 모델은 잠재적 분포를 이해하고 분포 변화에 미치는 기후변화의 영향을 파악하며 외래식물에 의한 생물적 침입의 위해성을 효과적으로 관리하는데 유용할 것으로 기대된다.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제1권1호
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• pp.74-82
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• 2020

Predictions of suitable habitat areas can provide important information pertaining to the risk assessment and management of alien plants at early stage of their establishment. Here, we predict the invasion potential of Muhlenbergia capillaris (pink muhly) in South Korea using five bioclimatic variables. We adopt four models (generalized linear model, generalized additive model, random forest (RF), and artificial neural network) for projection based on 630 presence and 600 pseudo-absence data points. The RF model yielded the highest performance. The presence probability of M. capillaris was highest within an annual temperature range of 12 to 24℃ and with precipitation from 800 to 1,300 mm. The occurrence of M. capillaris was positively associated with the precipitation of the driest quarter. The projection map showed that suitable areas for M. capillaris are mainly concentrated in the southern coastal regions of South Korea, where temperatures and precipitation are higher than in other regions, especially in the winter season. We can conclude that M. capillaris is not considered to be invasive based on a habitat suitability map. However, there is a possibility that rising temperatures and increasing precipitation levels in winter can accelerate the expansion of this plant on the Korean Peninsula.

• 한국환경복원기술학회지
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• 제23권1호
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• pp.15-36
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• 2020

The purpose of this study is to provide basic data for the establishment of the management plan of Seoullo 7017 after analyzing the characteristics of immigration plants in addition to those introduced plants. The taxa number of plants appeared as 276 taxa including 82 families, 161 genera, 246 species, 1 subspecies, 22 varieties and 7 forms. Among them, immigration plants appeared 79 classification groups, including 32 families, 65 genera, 77 species and 2 varieties. Invasive alien plants appeared as 22 classification groups in 79 classification groups of immigration plants. The ratio of America origin plants, second period(1932~1960) in introduction time and the wide diffusion species is high. In June, the growth and occurrence time of the immigration plants was the highest by monthly the characteristics of the growth of the immigration plants, the immigration plants appeared mostly. In case of dormancy form among life-form, the therophytes(th), in the propagation form-radicoid form, the R₅(monophyte), in the propagation form-disseminule form, the gravity D₄(having no special modification for dissemination), and in the growth form, the erect form(e) was high. The various immigration plants appeared in green areas covered by Zoysia japonica and low Hedera helix densities. This study is the first flora study since Seoullo 7017 was opened in 2017. And so continuous flora monitoring is required for Seoullo 7017.