• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.72-72
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• 2018

의도적 도입 또는 비의도적 도입에 의해 국내에 확산되고 있는 침입외래식물은 경제적, 환경적인 해를 가할 수 있으며 자생종의 감소나 절멸을 초래하는 등 생물다양성에 부정적인 영향을 미치는 것으로 알려져 있다. 특히 습지나 저수지 및 하안 생육지는 스트레스와 교란에 의해 외래식물 유입과 확산이 용이하므로 국립수목원에서는 이를 관리하기 위한 연구를 지속적으로 수행하고 있다. 본 연구에서는 수원시 하천변에서 발견한 바늘꽃과에 속하는 Ludwigia peploides (Kuntze) P.H.Raven가 생태계교란종으로 확산 될 우려가 있어 본 종에 대한 기재, 도해, 칼라도판 등을 첨부하여 침입외래식물 관리를 위한 기초자료를 확보하고자 한다.

• Journal of Wetlands Research
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• v.14 no.1
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• pp.47-57
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• 2012

We have measured soil enzyme activities, which represent the rates of organic matter decomposition, in four riparian ecosystems in Korea. ${\beta}$-glucosidase, N-acetylglucosaminidase, phosphatase and arylsulfatase activities were determined in five occasions over a year period in soils of control plots and plots with invasive plants, namely Sicyos angulatus and Humulus japonicus. Significantly higher enzyme activities were found in soils with invasive plant in barren land, but the difference was season and enzyme-specific. Although it was not universal changes, the invasive plants appeared to accelerate organic matter decomposition in some disturbed riparian ecosystems.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.65-65
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• 2018

외래종이라 함은 도입종, 귀화종, 침입종을 통칭하는 용어로 특정한 인위적 목적 여부에 관계없이, 본래의 자생지가 아닌 외부에서 들어와 다른 생물의 서식지를 점유하여 번식하는 생물종을 지칭하는 것으로, 침입외래종은 생태계에 도입되고 확산되면서 생물다양성과 연계된 생태계서비스를 위협하거나 또는 악영향을 미치는 외래종을 의미하며, 위해우려종이란 국내에 유입될 경우 생태계 등에 위해를 미칠 우려가 있어 환경부장관이 지정 고시하는 생물종 (살아있는 것으로서 개체의 일부 알 종자 등을 포함)을 지칭한다. 본 연구는 환경부고시에 따른 한반도 미유입 환경위해우려종43종에 대하여 농업환경위해성 평가를 실시하고, 분류동정 기법을 개발하는 등 기초 자료를 제공하고자 수행되었다. 이를 위해, 해외식물표본 확인과 미국 현장조사를 실시하였으며, 우선적으로 8종의 미유입 식물에 대하여 보고하고자 한다. - Carduus acanthoides L. (Asteraceae), Carduus tenuiflorus W. Curtis (Asteraceae), Onopordum acanthium L. (Asteraceae), Chromolaena odorata (L.) R.M. King & H. Rob. (Asteraceae), Hydrocotyle ranunculoides L.f. (Apiaceae), Oenanthe pimpinelloides L. (Apiaceae), Ehrharta erecta Lam. (Poaceae), Paspalum conjugatum P.J. Bergius (Poaceae).

• Life and Agrochemicals
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• v.26 no.3 s.206
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• pp.32-35
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• 2005

• Korean Journal of Environment and Ecology
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• v.31 no.1
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• pp.54-61
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• 2017

We investigate predation rates of larvae and juveniles of Rana catesbeiana by using six native predatory fishes and six birds to select effective species to ecological control and management of R. catesbeiana that is invasive alien species and affects seriously wetland in Korea. Among freshwater fishes, Pseudobagrus fulvidraco, Silurus asotus and Channa argus ate larvae and juveniles of R. catesbeiana, and prefer the former, however Opsariichthys uncirostris, Monopterus albus and Anguilla japonica didn't eat at all. Six experimental water birds, Cygnus columbianus, Cygnus cygnus, Anas crecca, Aix galericulata, Anas penelope and Anas formosa nerver ate them. We were able to confirm control of R. catesbeiana probability using the native predatory fishes in Korea wetland.

• Korean Journal of Environment and Ecology
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• v.33 no.6
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• pp.645-653
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• 2019

The purpose of this study was to understand the factors that affected activities and differences in seasonal activities of the invasive red-eared slider turtle (Trachemys scripta elegans) at Ansan reed wetland in Sangnok-gu, Ansan, Gyeonggi Province, the Republic of Korea. We installed nine nets in the study region to capture turtles and checked the nets twice a day for 154 days from April 28 to September 28 2013. In total, 60 individuals, including 12 juveniles, 26 adult males, and 22 adult females, were captured in 96 of 308 net checks. The multiple regression analysis of 12 environmental factors was conducted to analyze activity factors of red-eared slider turtle by assuming the number of turtles captured for a week to be the indicator of the activeness of the turtles. The result showed that the daylength was the only environmental factor that significantly affected the turtles' activity (p<0.001), and none of the other factors showed a significant correlation. The highest activity was recorded at the end of May, which was the beginning of the reproductive period. The daylength during the breeding season was significantly different from that during other seasons (Kruskal-Wallis test, p<0.001). The information about the relationship between environmental factors and species in habitat can be useful for the management of invasive alien species in the future.

• Environmental and Resource Economics Review
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• v.20 no.2
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• pp.357-379
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• 2011

The problem of invasive species has been recently emerged as one of complicated issues due to increasing globalisation and its consequence of species immigrations. Since in most cases of invasive species it is less likely to fully eradicate them through human efforts, it is often interested in reducing the possibility of ecological disaster caused by the invasive species. This paper provides an optimal control model to minimize such possibility while allowing the stochastic nature of biological growth of the invasive species. Conditions under which the partial eradication effort is optimal are derived. Simple numerical illustration is provided using H1N1 data which is categorized as an invasive disease in microorganism level.

• Ecology and Resilient Infrastructure
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• v.2 no.3
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• pp.255-263
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• 2015

Biological invasion of alien plants is considered to be one of the most serious threats to biodiversity in riparian zones. The effects of two invasive alien plants, Sicyos angulatus and Paspalum distichum var. indutum, on the flora and community structure of the riparian vegetation were investigated at 22 sites at streams in Korea. Sicyos angulatus has invaded the central Korean Peninsula. This alien plant has caused problems to stream managers because of its aggressive vining growth. It had suppressed native vegetation such as trees, shrubs and tall grasses on bank slope and higher floodplains. Paspalum distichum var. indutum has become more widespread in the southern part of Korea. This invasive plant has shallow rhizomes and creeping, extensively branched stolons. It forms a dense mat over lotic or slowly-flowing water and threatens submerged and short emergent hydrophytes. In order to control the introduction and expansion of alien plants, limitation of artificial disturbances and appropriate alien plant management are needed in riparian areas.

• Korean journal of applied entomology
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• v.59 no.4
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• pp.277-280
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• 2020

During late July 2020, a species of weevil in the genus Aclees (Curculionidae, Molytinae) was found on several fig farms in the Haenam-gun district of Jeonnam Province, Korea. The weevil was subsequently identified as Aclees taiwanensis Kôno, 1933 (Coleoptera: Curculionidae), an exotic species, probably of subtropical and tropical Asian origin, that has also been introduced to Italy and France, where it is associated with severe damage to fig trees. This is the first report of an Aclees weevil in Korea.

• Ecology and Resilient Infrastructure
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• v.3 no.3
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• pp.189-200
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• 2016

The species distribution model would be a useful tool for understanding how invasive alien species spread over the country and what environmental variables contribute to their distributions. This study is focused on the potential distribution of two invasive alien species, the common ragweed (Ambrosia artemisiifolia) and knotgrass (Paspalum distichum) in the Korean Peninsula. The maximum entropy (Maxent) model was used for the prediction of their distribution by inferring their climatic environmental requirements from localities where they are currently known to occur. We obtained their presence data from the Global Biodiversity Information Facility and the Korean plant species databases and bioclimatic data from the WorldClim dataset. As a results of the modelling, the potential distribution predicted by global occurrence data was more accurate than that by native occurrence data. The variables determining the common ragweed distribution were precipitation of the driest month and annual mean temperature. Both annual and the coldest quarter mean temperatures were critical factors in determining the knotgrass distribution. The Maxent model could be a useful tool for the prediction of alien species invasion and the management of their expansion.