Comparison of climatic similarity for evaluating possibility of Leptoglossus occidentalis inhabitation in South Korea

Dae-hyeon Byeon,Sunghoon Jung,Wang-Hee Lee 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04

Climatic factors are known to be the most critical on estimating potential distribution of species, suggesting that an area having similar climate to origin of a pest may be vulnerable to its invasion. In this study, we selected Leptoglossus occidentalis, a pest causing significant forest damage in South Korea, and compared current climate of its 3 known origins with that of 74 cities in South Korea by using ‘Match Climate’ function in CLIMEX software. Result showed that overall climatic similarity between them was moderately high, indicating consistency of climatic similarity with the current distribution of Leptoglossus occidentalis in South Korea.

Climatic similarity between Solenopsis invicta origin and South Korea

Dae-hyeon Byeon,Wang-Hee Lee,Sunghoon Jung 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10

Climatic similarity between a native region and a target area is the first step to be considered for judging an invasive risk of alien species. In this study, we compared climate of the origin of Solenopsis invicta with that of South Korea. Match Climate application in CLIMEX software was used to simulate Composite Match Index (CMI) which quantitatively evaluated climatic similarity between two locations. We selected a native city (Cordoba in Argentina) of Solenopsis invicta and compared its climate with the current climate in South Korea. Result showed that climatic similarity is higher in Gyeongsangbuk-do area including Andong and Pohang, When only comparing climate during April to October, CMI was generally increased, but areas with the highest CMI was decreased.

Developing the first information for species distribution model of Solenopsis geminata

Dae-hyeon Byeon,Jae-Min Jung,Jong-Ho Lee,Sunghoon Jung,Wang-Hee Lee 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04

Solenopsis geminata has been found in South Korea, suggesting a risk of its invasion has been increased by rapid climate change. This situation requires species distribution modeling to predict possibility of Solenopsis geminata introduction, but information necessary for performing it is very limited. In this study, we developed a map for global distribution of Solenopsis geminata so that the map can be used for future species distribution modeling. Also, as the first step to assess Solenopsis geminata introduction, climatic similarity between its origin (Puerto Rico) and major cities in South Korea was compared. We used ArcMap (version 10.0) for creating the distribution map by obtaining current habitat from public database, and CLIMEX was used to compare climates based on CMI value. The result showed that climates were not similar as indicated by CMI less than 0.52, suggesting the risk of intial introduction is low under the current climatic condition. However, it should be noted that climatic similarity did not consider biological characteristics of Solenopsis geminata and climate change. Thus, the next study will be devoted to climatic suitability simultaneously considers meteorological data, distribution and biological information.

린더(Linder)의 가설과 농산물 무역: 과일 및 채소류 수입을 중심으로

김대석 ( Dae-seok Kim ),조규대 ( Gue-dae Cho ),서종석 ( Jong-seok Seo ) 한국농업정책학회 2010 농업경영정책연구 Vol.37 No.4

Using a gravity equation, this study examines the Linder hypothesis in agricultural trade. Rather than utilizing per capita income similarity generally used in this area, we used the climatic similarity as a proxy variable of the similarity of demand structure between countries. To examine the issue, imports data from 39 countries regarding fruits and 36 countries regarding vegetables from 1999 to 2008 to Korean market was used. This study finds that strong statistical evidence of the climatic similarity increases the agricultural trade between countries, which could be considered as evidence of the Linder hypothesis explaining agricultural trade.

Climatic similarity between Solenopsis invicta origin and South Korea

Dae-hyeon Byeon,Sunghoon Jung,Wang-Hee Lee 한국농약과학회 2018 한국농약과학회 학술발표대회 논문집 Vol.2018 No.10

R/S 기법을 이용한 지역별 월 강수량 자료의 자기유사성 평가

김소래,장민원,이상환,지원현,유찬 경상대학교 농업생명과학연구원 2017 농업생명과학연구 Vol.51 No.6

It has been reported the steep increasement of natural hazards in recent, that was caused byflood or drought with the abrupt climate change. It was raised the concern about the predictionmethod for the climate change and then it has been tried to apply the fractal analysis method tomodel such random natural phenomenon for last a couple of decades. But it looks like that theappropriate research results was not reported enough yet. In this study, it was estimated the Hurstexponent(H), as one of tool to apply fractal theory to natural system, to evaluate the self-similarityof monthly precipitation data of 64 climate stations in Korea. It was shown a range ofH=0.97~0.99, and was H>1/2 that is the obvious evidence of self-similarity in the variations ofmonthly precipitation data. As a result, It was verified that abnormal precipitation trends show theself-similarity and Hurst exponent could be apply to the prediction of future behavior ofprecipitation variation in Korea. 최근 강우 발생빈도의 불규칙한 변화로 홍수 및 가뭄 피해가 증가함에 따라 불규칙한 자연현상의 특성을 예측하는 확률론적 방안들이 관심을 받고 있다. 본 연구에서는 자연계 현상을 확률론적으로 예측하는 기법인 플랙탈이론의 허스트지수(Hurst exponent)를 이용한 자기유사성 평가를 전국 64개 기상관측소의 월강수량 자료를 대상으로 실시하였다. 1986년부터 2015년까지 총 30년 동안의 월강수량을 평가한 결과 허스트지수는 H=0.97~0.99의 범위로 나타났다. 이는 H>1/2의 양의 상관관계를 보이며, 자기유사성을 가지는 것으로 평가될 수 있어 기존의 축척된 자료를 통해 향후의 이상강우에 대한 예측이가능하다는 사실을 보여주는 것으로 나타났다.

한국에서 동아시아 난대 목본식물의 잠재분포 가능성 평가

이철호,김휘래,조강현,최병기,이보라 응용생태공학회 2022 Ecology and resilient infrastructure Vol.9 No.4

The prediction of changes regarding the distribution of vegetation and plant species according to climate changes is important for ecosystem management. In this study, we attempted to develop an assessment method to evaluate the possibility of the potential distribution of warm-temperate woody plant species of East Asia in Korea. To begin with, a list of warm-temperate woody plants distributed in China and Japan, but not in Korea, was prepared, and a database consisting their global distribution and bioclimatic variables was constructed. In addition, the warm-temperate vegetation zone in Korea was delineated using the coldness index and relevant bioclimatic data were collected. After the exclusion of multicollinearity among bioclimatic variables using correlation analysis, mean temperature of the coldest quarter, mean temperature diurnal range, and annual precipitation were selected as the major variables that influence the distribution of warm-temperate plants. A multivariate environment similarity surfaces (MESS) analysis was conducted to calculate the similarity scores between the distribution of these three bioclimatic variables in the global distribution sites of the East Asian warm-temperate woody plants and the Korean warm-temperate vegetation zone. Finally, using stepwise variable-selection regression, the mean temperature of the coldest quarter and annual precipitation were selected as the main bioclimatic variables that affect the MESS similarity index. The mean temperature of the coldest quarter accounted for 88% of the total variance. For a total of 319 East Asian warm-temperate woody plant species, the possibility of their potential distribution in Korea was evaluated by applying the constructed multivariate regression model that calculates the MESS similarity index. 기후변화에 따라서 식생과 식물종의 분포 변화를 예측하는 것이 생태계 관리에서 중요하다. 본 연구에서는 동아시아의난대 목본식물종의 한반도 분포 가능성을 체계적으로 평가할 수 있는 방안을 개발하고자 하였다. 먼저 중국과 일본에서는 분포하지만한국에는 분포하지 않은 난대 목본식물종의 목록을 수집하고 그들의 전지구적 분포와 생물기후 자료를 수집하였다. 또한 한국의난대식생대를 한랭지수를 이용하여 구분하고 이 지역의 기후 정보를 수집하였다. 기후 변수들 사이의 상관분석으로 다중공선성을배제하고 분포에 영향을 미치는 기후변수로서 최한사분기 평균기온, 평균온도일교차 및 연강수량이 선택되었다. 동아시아 난대목본식물종의 분포지와 한국 난대식생대의 3가지 기후 변수 사이의 유사도를 산출하기 위하여 다변량 환경 유사도 표면 (MESS) 분석을 실시하였다. 최종적으로 단계적 변수선택 회귀로 MESS 유사도 지수에 영향을 미치는 주요 기후변수로서 최한사분기평균기온과 연강수량을 선별하였다. 선택된 2 변수로 구성된 다변량 일차회귀에서 최한사분기 평균기온이 전체 변이의 88%를차지하였다. 총 319 동아시아 난대 목본식물종에 대하여 MESS 유사도 지수를 산출하는 구축된 다변량 회귀식을 적용하여 이들이한국에 잠재분포 할 가능성을 평가할 수 있었다.

한반도 최외곽 도서들의 식물지리적 특성

김현희(Hyun Hee Kim),김다빈(Da Bin Kim),송현호(Hyun Ho Song),황가영(Ga Young Hwang),공우석(Woo Seok Kong) 대한지리학회 2018 대한지리학회지 Vol.53 No.2

본 연구는 우리나라 최외곽 도서지역(백령도, 대청도, 소청도, 흑산도, 홍도, 가거도, 울릉도, 독도)의 식물상과 그 특징을 분석하였다. 이들 도서지역은 기후요소(기온, 강수량 등)의 지역적 차이가 뚜렷하였으며, 분포하는 자생식물은 총 145과 1,465종으로 조사되었다. 8곳에 모두 분포하는 종은 14종(1%)에 불과하며, 그 중 단 1곳의 섬에만 분포하는 종이 541종으로 전체 출현종의 36.9%를 차지한다. 또한, 도서지역 식물상은 뚜렷한 지역적 차이를 보이는데 유사도 분석 결과 서해 중부 도서권과 서해 남부 도서권 그리고 울릉도권으로 구분된다. 특히 울릉도는 직선거리가 가까운 서해 중부 도서보다 서해 남부 도서들과 식물상이 유사하다. 권역별 유사도 결과는 울릉도와 서해 중부 도서권 51.76%, 울릉도와 서해 남부 도서권 52.81%이다. 연구지역에 분포하는 희귀식물은 울릉도가 49종으로 가장 많았으며, 이들 또한 뚜렷한 지역적 분포 차이를 가진다. In this study, we analyzed plants in South Korea’s outermost island regions (Baengnyeongdo, Daecheongdo, Socheongdo, Ulleungdo, Dokdo, Heuksando, Hongdo and Gageodo) and their characteristics. These island regions had clear regional differences like climate elements (Temperature and precipitation, etc.), and wild plants in 145 families and 1,465 species were distributed. There were only 14 species distributed in all eight areas (1%), and 541 species were distributed only on one island, which took up 36.9% of the emerging species. In addition, there were distinct regional differences among the plants in the island regions, and as a result of an analysis of similarity, they are divided into west coast central island region, southwest coast island region and Ulleungdo region. Especially, Ulleungdo has more similar plants to those in southwest coast islands than west coast central islands, which are closer. In the result of the analysis of similarity by region, the similarity is 51.76% between Ulleungdo and west coast central island region and 52.81% between Ulleungdo and southwest coast island region. As for rare plants spread in the regions of the research, Ulleungdo had the most plants (49 species), and they also have distinct regional differences in distribution.