• Journal of Crop Science and Biotechnology
• /
• 제10권4호
• /
• pp.223-230
• /
• 2007

Vitellaria paradoxa commonly called shea is an important agro forestry and fruit-bearing species present in four agro-ecological zones of Cameroon. The goal of this work was the morphological characterization of certain populations of V. paradoxa which will serve as a necessary step for a subsequent genetic study of the species. Morphological observations related to 20 agronomic traits, studied on 8-13 trees selected from each of the eight shea populations across four different agro-ecological zones located in four provinces of Cameroon were studied. The study showed that there was a variation between the populations, related to the traits measured on the trunk, fruit, nut, and leaf. Three shapes of the tree(ball, broom, and trained), five shapes of the fruit(round, oblong, reversed pear, ovoid, and oblong), three colors of the nut(clear brown, dark brown, and blackish brown) were identified. The principal component analysis(PCA) carried out on the quantitative characters revealed 72% of the total variance expressed on the first and second main axis. This variation was essentially explained by the traits measured on the fruits and on the nuts. The analyses showed that only the traits of the fruits and the nuts were discriminative. The shea populations studied were structured into two distinct groups using these discriminative traits.

• 한국물환경학회지
• /
• 제34권5호
• /
• pp.447-461
• /
• 2018

To realize river restoration that ecological characteristics of the river are reflected, we classified the river into four reaches of valley stream, upstream, midstream, and downstream based on substrate as well as riverbed gradient obtained from the relationship between distance from the river mouth, and above sea level. Considering that the rivers of Korea have been dominated by various and intense artificial interferences over a lengthy period, we determined cross sectional range of the river based on the geological map and clarified transformation degree by reach. Vegetation profile diagram was prepared by depicting horizontal range and vertical stratification of major vegetation appearing in a belt transect of 10 m breadth installed between weirs constructed in both sides of the river. Restoration models by river reach were prepared based on breadth of waterway, bare ground, herb, shrub, and tree dominated vegetation zones on vegetation profiles wherein a flooding regime was reflected. Species composition information collected from vegetation established in each zone was systematized to use for restoring each reach ecologically. Further, background that longitudinal reaches and horizontal zones were divided, was discussed by comparing with case studies in foreign countries. In addition, necessity of ecological restoration of the river was discussed based on degree of integrity of Korean rivers, ecological significance of riparian vegetation, and importance of reference information for ecological restoration of the river.

• Animal cells and systems
• /
• 제16권4호
• /
• pp.329-336
• /
• 2012

This study evaluated ecological health, using various biomarkers and bioindicators, of pale chub (Zacco platypus) as a sentinel species, in Daejeon Stream, South Korea, during AprilMay 2011. The biomarkers and bioindicators were compared among three sites of control: Reference ($C_z$), transition ($T_z$), and the urban zones ($U_z$); and the 7-Ethoxyresorufin-O-deethylase (EROD) activity, DNA damage, acetylcholinesterase (AChE) activity, and vitellogenin (VTG) concentrations were more significantly increased in the $U_z$ than in the $C_z$. Also, physiological markers such as condition factor, liver somatic index, visceral somatic index, and gonad somatic index were significantly increased in the $U_z$ than in the $C_z$. For the health assessments, three categorized parameters of blood chemistry, molecular biomarkers, and physiological bioindicators were standardized and calculated as a star-plot, representing values of Integrated Health Response (IHR). Values of IHR had more significant (P<0.05) increases in the $U_z$ than any other zones, indicating an impairment of ecological health by organic matter, nutrients (N, P), and toxic chemicals. This study is based on low levels of biological organization approach of molecular and physiological biomarkers and bioindicators, so further study of high-levels of biological organization approach such as community and population is required for overall range of health assessments. The approach of IHR values, however, may be useful in providing early warning of future impacts on ecological health.

• The Korean Journal of Ecology
• /
• 제13권3호
• /
• pp.237-245
• /
• 1990

Ninety six plant species recorded at the alpine tundra zone on the Paektusan (Zhu and Rowe, 1987) were examined on the floras of alpine and subalpine zones in Korea. Among the 96 species, 59(61%), 47(49%) and 51(53%) species in the alpine zone of Kwanmobong, Turyusan and Puksubaeksan were recognized respectively, and 24(25%), 21(22%), 11(11%) and 16(17%) species in the subalpine zone of Myohyangsan, Kumgangsan, Soraksan, Chirisan and Hallasan respectively. The similarities between the alpine tundra zone of Paektusan and the alpine zones of other mountains in Korea showed high values than the values compared with subalpine zones.

• The Korean Journal of Ecology
• /
• 제24권2호
• /
• pp.101-109
• /
• 2001

We created an environmental forest on the basis of ecological design around the incineration plant of Jindo Engineering and Construction Co., Ltd., which is located in Jeongwang-dong, Siheung-si, Kyunggi-do. To get ecological information of this site, physico-chemical properties of soil on salt marsh, which is located close to the syudy site and of forest soil transported from other sites for ecological restoration were analyzed. Texture of salt marsh and transported soils were loam and sandy loam, respectively. pH, organic matter, T-N, available P, and exchangeable K and Na contents of salt marsh and transported forest soils were 6.7 and 5.4, 4.1 and 0.4%, 1.0 and 0.3mg/g, 46.7 and 6.8ppm, 521 and 207ppm, and 3.8 and 0.5mg/g, respectively. Introduced plants were selected among the dominant species of forests and the species composing the potential natural vegetation around the present study site. Those plants were selected again by considering the tolerances to air pollution and to salt, and their availability. Selected trees were Pinus thunbergii, Sophora japonica, Celtis sinensis, Quercus aliena, Q. serrata, Q. dentata, and Q. acutissima. Selected sub-trees were Albizzia julibrissin, Koelreuteria poniculata, and Styrax japonica and shrubs were Rhododendron yedoense var. poukhanense, R. mucronulatum, Callicarpa japonica, Euonymus alatus, E. japonica, and R. schlippenbachii. On the other hand, introduction of herbs was not considered except for Liriope platyphylla, which was ornamentally planted in one site. Planting bed of mound type was adopted to provide the fine drainage system. Mound was designed to furnish litter, A, B, and C layers simuating the profile of forest soil. Slope of mound was mulched by rice straw of 2cm in thickness to prevent for sliding of litter and soil in cases of strong wind or heavy rain. Height of mound was designed to secure more than 1 m by combining A and B layers. Narrow zones, in which mound with stable slope degree cannot be prepared, was designed to equip the standard soil depth with the introduction of stone for supporting. On the other hand, plants with shallow root system were arranged in some zones, in which satisfactory soil depth cannot be ensured. Plants were arranged in the order of tree, sub-tree, and shrub from center to edge on the mound to make a mature forest of a dome shape in the future. Dispersion of plants was designed to be random pattern rather than clumped one. Problems on creation of the environmental forest by such ecological design were found to be management or inspection by non-specialized project operators and inspecting officers, and regulations for construction without ecological background. Alternative plans to solve such problems were suggested.

• 한국지리정보학회지
• /
• 제18권2호
• /
• pp.45-58
• /
• 2015

본 연구는 낙동강 부유쓰레기에 대한 실태 조사와 이동 경로 추적 시험을 통해 주요 집적 구간을 파악하고자 하였다. 또한, 주요 집적 구간을 대상으로 표본 조사를 실시하여 부유쓰레기의 유입량 및 성상을 파악하였다. 그 결과 낙동강 중 하류 지역으로부터 총 5곳의 집적 구간이 선정되었으며 대량의 초목류와 생활쓰레기가 집적되어 있었다. 그리고 하류 지역에 위치한 2곳의 집적 구간에서는 부유쓰레기가 해양으로 유출될 가능성이 큰 것으로 예측되었다. 주요 집적 구간에 대한 표본 조사에서는 초목류와 생활쓰레기를 포함한 $40{\ell}$이상의 쓰레기가 수거되었다. 생활쓰레기의 성상을 분류한 결과 플라스틱류가 49%를 차지하였으며 스티로폼류가 36%로 대부분을 차지하였다. 향후 본 연구는 낙동강 부유쓰레기의 해양 유입을 줄이고 효율적인 사전 수거 활동을 계획하는데 도움을 줄 것으로 기대된다.

• 한국조경학회지
• /
• 제48권5호
• /
• pp.16-27
• /
• 2020

본 연구는 서울시 도심 하천 중 국가하천인 중랑천을 대상으로 보전지역 설정 프로그램인 Marxan with zones 프로그램을 기반으로 한 하천 내 보전지역 설정 및 생태적 관리방안을 제시하였다. Marxan with zones 프로그램 적용은 유역권(planning unit) 설정, 맵핑지표(mapping index) 적용, 반복적인 분석을 위한 수치보정, 분석을 통한 시나리오 별 최적안 작성, 시나리오 별 민감도 분석, 시나리오 중 최적안 검토 및 선정 단계로 진행하였다. 중랑천 내 보전지역 설정 결과, 기존에 보전지역으로 지정 및 관리하고 있는 중랑천 상류 야생생물보호구역을 포함한 다수의 유역권과 중랑천 하류의 철새보호구역을 포함한 유역권이 핵심보전지역으로 설정되었다. 상류는 중랑천을 중심으로 수락산과 도봉산 등 산림이 인접하여 다수의 야생조류가 관찰되었다. 하류는 한강 합수부, 청계천 합수부 등 하천생태계가 인접하여 하천을 따라 이동하는 철새 도래지이다. 따라서 중랑천 상류와 하류는 유역권 내 도봉산, 수락산, 응봉산 등 산림생태계, 도심 내 녹지, 청계천 합수부, 한강 합수부 등 다양한 생태계와 연결되어 있어 보전지역 설정에 영향을 주었다. 본 연구는 보전지역 검증 시 Marxan with zones 프로그램을 통한 기존 보전지역 설정 및 평가를 검증하였고, 프로그램을 통해 핵심보전지역으로 도출된 유역권을 생태적으로 관리하기 위해 하천 내 관리방안과 유역권 관리방안으로 구분하여 제시하였다.

• 환경영향평가
• /
• 제27권5호
• /
• pp.489-508
• /
• 2018

기후변화에 대응하여 보다 적극적인 생물보전전략 수립을 위해 생물 서식환경의 변화예측이 필요하며, 생물기후권역은 유용한 생태계 관리체계를 제공할 수 있다. 이에 따라 본 연구에서는 생물기후권역구축을 통해 동북아시아의 생물 서식환경을 파악하고, 생물 서식관점에서 기후변화의 영향을 분석하였다. Worldclim에서 제공하는 현재(1970~2000년) 기후자료 및 17개 전 지구 기후모형의 예측자료(RCP4.5, RCP8.5)를 이용하여 2050년대와 2070년대의 변화를 모의하였다. 먼저 현재와 미래의 주요생물기후변수(Aridity index, growing degree days, potential evapotranspiration seasonality, temperature seasonality)를 구축하여 동북아시아의 생물기후환경 특성을 파악하고, 기후변화에 따른 시공간적 변화를 분석하였다. ISODATA 군집분석으로 현재의 생물기후권역을 구분하고, MLC(Maximum Likelihood Classification)를 통해 미래의 권역변화를 예측하였다. 기후변화에 따라 대부분의 권역이 북상하는 경향성을 확인할 수 있었으며, 권역의 면적과 위도 분포변화를 분석함으로써 권역의 축소가 가장 두드러지게 나타나는 중국 남부에 위치한 권역을 집중 관리권역으로 제시하였다. 본 연구는 한반도를 포함한 동북아시아 지역의 다양한 기후변화 시나리오에 따른 영향평가를 바탕으로 향후 기후변화에 대응한 생물종 혹은 생태계 관련 적응정책 수립 시 활용 가능한 기초자료를 제공할 수 있을 것으로 사료된다.

• The Korean Journal of Ecology
• /
• 제19권5호
• /
• pp.465-476
• /
• 1996

There are several environmental variables that may be influential to the spatial distribution of forest vegetation. To create a map of forest vegetation zone over southern part of Korean Peninsula, digital map layers were produced for each of environmental variables that include topography, geographic locations, and climate. In addition, an extensive set of field survey data was collected at relatively undisturbed forests and they were introduced into the GIS database with exact coordinates of survey sites. Preliminary statistical analysis on the survey data showed that the environmental variables were significantly different among the previously defined five forest vegetation zones. Classification of the six layers of digital map representing environmental variables was carried out by a supervised classifier using the training statistics from field survey data and by a clustering algorithm. Although the maps from two classifiers were somewhat different due to the classification procedure applied, they showed overall patterns of vertical and horizontal distribution of forest zones. considering the spatial contents of many ecological studies, GIS can be used as an important tool to manage and analyze spatial data. This study discusses more about the generation of digital map and the analysis procedure rather than the outcome map of forest vegetation zone.

• Asian-Australasian Journal of Animal Sciences
• /
• 제15권5호
• /
• pp.643-649
• /
• 2002

Availability of feeds and fodder and amount of their intake by large ruminants in eight different agro-ecological zones (AEZ) of Bangladesh were recorded over a year. Roughages such as straw, naturally grown green grass, water hyacinth, tree leaves, legumes and sugarcane tops were the major feedstuffs fed to the large ruminants. Amount of intake of these ingredients differed (p<0.01) across AEZ studied, but did not differ across seasons or farmers' categories (p>0.05) except for green grasses (p<0.01). Byproduct concentrates offered to animals in the studied areas were rice bran, wheat bran and different oil cakes. The amount of intake of concentrates by the animals also differed (p<0.01) across AEZs, but did not differ across seasons or farmers' categories (p>0.05), except for rice bran and wheat bran which differed between season and farm category, and season respectively (p<0.01). The large standard errors of mean indicate that there are wide variations in intake of roughages and concentrates across AEZ's, seasons and farmers' categories and even across days. This further indicates that the feeding practices of large ruminants are largely heterogeneous. In addition to feeding roughage and concentrates, the animals were allowed to graze for six hours a day. Grazing hours also differed (p<0.01) across AEZ, but not by farmers' categories or seasons.