• Title/Summary/Keyword: Twinspan

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Vegetation Structure of the Mookdong Area in the Weolchulsan National Park (월출산국립공원 묵동지역의 식생구조 분석)

  • Choi Song-Hyun;Cho Hyun-Seo;Kang Hyun-Mi
    • Korean Journal of Environment and Ecology
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    • v.20 no.2
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    • pp.103-113
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    • 2006
  • To investigate the forest structure and to suggest basic data for forest management in the Mookdong area of the Weolchulsan National Park, thirty plots, each size is $100m^2$, were set up and surveyed. According to analysis of classification by TWINSPAN, the community was divided by five groups of Quercus variabilis-Q. mogolica(I), Q. variabilis(II), Q. variabilis-Pinus densiflora(III), P. densiflora(IV), Q. acutissima(V). The structure of communities were investigated using importance value. From the above results, it was anticipated that Quercus spp. will be dominance species instead of Pinus densiflora.

Vegetation Structure of the Dogabsa Valley in the Weolchulsan National Park (월출산국립공원 도갑사계곡의 식생구조)

  • Choi Song-Hyun;Cho Hyun-Seo
    • Korean Journal of Environment and Ecology
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    • v.20 no.2
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    • pp.94-102
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    • 2006
  • To investigate the forest structure and to suggest basic data of forest in the Dogabsa Valley area of the Weolchulsan National Park, thirty plots, each size is $100m^2$, were set up and surveyed. According to the analysis of classification by TWINSPAN, the community was divided by five groups of Quercus variabilis-Carpinus tschonoskii(I), Pinus densiflora(II), Q. variabilis-P. densiflora(III), Q. variabilis(IV) and Q. aliena-Styrax japonicus community(V). The results of vegetation structure analysis, the forest of Dogabsa Valley area is a transition area of southern part of temperate forest and warm temperate forest zone. The forest is about 40-50-year-old.

Vegetation Structure of the Kumsaenggol in the Wolchulsan National Park (월출산국립공원 금생골의 식생구조)

  • Choi, Song-Hyun;Kang, Hyun-Mi
    • Korean Journal of Environment and Ecology
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    • v.20 no.4
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    • pp.464-472
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    • 2006
  • To investigate the forest structure and to suggest a basic management data of the forest in the Kumsaenggol area of Wolchulsan National Park, thirty plots were set up and surveyed. According to the analysis of classification by TWINSPAN, the community was divided into the four groups of Quercus variabilis(I), Q. acutissima(II), Pinus densiflora(III) and P. densiflora-Q. acutissima(IV). From the results of the above, it could be determined that communities I and II were in a developmental stage of the ecological succession, in which the Quercus app. community progressed from Pinus densiflora. Additionally, communities III and IV are also in a developmental stage and will be expected to show competition regarding Pinus densiflora.

Vegetation Structure in Relation to Altitude from Jeongryeongchi to Gogiri Section in Baekdudaegan (백두대간 정령치-고기리 구간의 해발고에 따른 식생구조)

  • 최송현;조현서;김보현
    • Korean Journal of Environment and Ecology
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    • v.16 no.4
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    • pp.433-440
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    • 2003
  • A vegetation structure by attitudinal changes from Jeongryongchi to Gogiri section of Baekdudaegan were investigated by sample plots(nine 500$m^2$). Using TWINSPAN and DCA techniques, vegetation structure was analyzed. In the results from the analysis of both techniques, Quercus mongolica is dominant species and attitudinal zonations were divided into 2 groups such as above 900m area and lower one by subspecies in subtree and shrub layers. Similarity index analyses of elevational ranges showed discontinuities between above and lower elevation area. In the analysis of species diversity, there was no significant difference due to altitude.

An Analysis of Vegetation Structure and Vegetation-Environment Relationships with DCCA in the Valley Part of Kyeryongsan national Park (계룡산국립공원(鷄龍山國立公園) 계곡부(溪谷部) 식생(植生)의 구조(構造)와 DCCA에 의한 식생(植生)과 환경(環境)과의 상관관계(相關關係) 분석(分析))

  • Park, Young-Soon;Song, Ho-Kyung;Yee, Sun;Lee, Mi-Jeong
    • Journal of Korean Society of Forest Science
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    • v.90 no.3
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    • pp.249-256
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    • 2001
  • The objective of this study was to analyze characters of the vegetation structure, vegetation-environment relationships of Kyeryongsan forest community. Fifty plots were sampled in the valley forest of Donghaksa, Gabsa, Sanghasinri and Shinwonsa regions in Kyeryongsan. Field survey was carried out in August of 1999 to examine a vegetation type and measure a diameter. The classification by TWINSPAN, the DCCA ordination, and structure of stand were used to analyze data. The results of this study are as follows : 1. With the classification by TWINSPAN, the community was categorized into four groups, such as Carpinus laxiflora, Quercus variabilis-Quercus serrata, Zelkova serrata-Celtis jessoensis and Carpinus cordata communities. 2. The dominant species in Carpinus laxiflora community were Carpinus laxiflora, Quercus variabilis, Quercus serrata, Pinus densiflora and Styrax japonica. The dominant species in Quercus variabilis-Quercus serrata community were Quercus variabilis, Quercus serrata, Styrax japonica, Castanea crenata and Platycarya strobilacea. The dominant species in Zelkova serrata-Celtic jessoensis community were Quercus serrata, Castanea crenata, Lindera erythrocarpa, Zelkova serrata and Styrax japonica. The dominant species in Carpinus cordata community were Carpinus cordata, Carpinus laxiflora, Sapium japonicum, Cornus controversa and Zelkova serrata. 3. The results of the correlation between Kyeryongsan valley forest community and environmental factors by DCCA ordination method are as follows; The Carpinus laxiflora community was found in low elevation and steep slope area. The Quercus variabilis-Quercus serrata community was found in low elevation and lower slope area. The Zelkova serrata-Celtis jessoensis community was found in high elevation and lower slope area. The Carpinus cordata community was found in high elevation and midium slope area.

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The Analysis of Vegetation-Environment Relationships of the Coniferous Forests in Subalpine Districts of Mt. Chiri by TWINSPAN and CCA (TWINSPAN 및 CCA에 의한 지리산(智異山) 아고산대(亞高山帶) 침엽수림군집(針葉樹林群集)과 환경(環境)의 상관관계(相關關係) 분석(分析))

  • Lee, Soo Won;Lee, Kang Young;Song, Ho Kyung
    • Journal of Korean Society of Forest Science
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    • v.86 no.3
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    • pp.279-287
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    • 1997
  • This study was carried out to identify the analysis of vegetation-environment relationships of the coniferous forests in subalpine districts of Mt. Chiri by two-way indicaton species analysis(TWINSPAN) and CCA. The results are summarized as follows; The subalpine coniferous forest in Mt. Chin was classified Abies koreana community group by the TWINSPAN method. The Abies koreana community group was classified Abies koreana-Pinus densiflora, Abies koreana-Quercus mongolicd and Abies koreana-Picea jezoensis. The Abies koreana-Quercus mongolica community classified into two subcommunities, typical and Pinus koraiensis subcommunity. The Abies koreana-Picea jezoensis community classified into three subcommunities such as typical, Taxus cuspidate and Cornus controversa subcommunity. The subalpine conifers commnities in Mt. Chiri could be classified into six vegetation units, which consisted of three vegetation communities and five subcommunities. The relationship between vegetation community and influencing environmental factors was analyzed by using the CCA ordination method. It was found that altitude, concentrations of $Ca^{++}$ and $Mg^{++}$ in soil were, major environmental variables, which influence the distribution of vegetation community in the first axis, and $Ca^{++}$ and altitude in the second axis. In the relations of communities and environmental factors by CCA, the optimal ecological habitats of Abies koreana-Pinus densiflora community could be located at low elevations, in which $Ca^{++}$ and $Mg^{++}$ are rich. Abies koreana-Quercus mongolica community prefers the sites in mid-elevation zone, in which $Ca^{++}$ and $Mg^{++}$ are medium level in soil. The optimum site for Abies koreana-Pinus koraiensis community and Abies koreana-Taxus cuspidata community could be high elevations in which $Ca^{++}$ and $Mg^{++}$ are poor. Abies koreana-Cornus controversa community is found in the site at low elevations where $Ca^{++}$ and $Mg^{++}$ are medium.

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Analysis of Vegetation-Environment Telationships of Main Wild Vegetables on Short-term Income Forest Products, in Korea (단기소득임산물 자생지 주요 산채류 식생과 환경의 상관관계 분석)

  • Kim, Hyoun-Sook;Lee, Sang-Myong;Lee, Joongku
    • Korean Journal of Environment and Ecology
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    • v.33 no.4
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    • pp.447-452
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    • 2019
  • This study was conducted in 2016-2017 to provide the basic ecological data needed to establish environmental conditions for the cultivation of wild vegetables. It used TWINSPAN to classify the vegetation structure of natural habitats of wild vegetable nationwide and DCCA ordination to analyze the correlation between the by community structure and environmental factors. We performed TWINSPAN on 100 taxa with high importance values in 91 plots of major habitats of wild vegetables. The vegetation was classified into Cirsium setidens and Synurus deltoides group, Ligularia fischeri and Hemerocallis fulva group, Adenophora divaricata var. manshurica group, Platycodon grandiflorum and Aster scaber group, Aralia elata and Pteridium aquilinum group, and Pimpinella brachycarpa and Osmunda japonica group communities. We then performed DCCA ordination of 11 communities classified by TWINSPAN and 11 environmental factors. The results showed that the altitude had the strongest correlation with the vegetation. The Cirsium setidens, Synurus deltoids, and Lifularia fischeri communities were distributed in areas with similar environmental factors such as high altitude, gentle slope, and nutrient. The Aralia elata and Osmunda japonica communities were distributed in the location environment with low altitude, pH, O.M, T-N, $Ca^{2+}$, and C.E.C. The Hemerocallis fulva community was distributed in the location environment with moderate northeastern and northwestern slope, low altitude and pH, and high $P_2O_5$, whereas the Adenophora divaricata var. manshurica community was distributed in the location environment with gentle southeastern and southwestern slope, high altitude and pH, and low $P_2O_5$, which was the opposite tendency of the location environment from Hemerocallis fulva community. The Platycodon grandiflorum community was distributed in the location environment with gentle southwestern slope, low altitude, pH, O.M, T-N, $P_2O_5$, $Ca^{2+}$, and C.E.C., and high $Mg^{2+}$. The Pteridium aquilinum community was distributed in the location environment with southwestern slope, low altitude, O.M, T-N, C.E.C, $P_2O_5$, $Ca^{2+}$, and $K^+$. The Aster scaber and Pimpinella brachycarpa communities were widely distributed in many plots with various location environments.

The Environmental Impact and the Structure of Plant Community of Daekwanrim I Hanyang (함양 대관림의 피해상태 및 식물군집 구조)

  • 이경재;조남훈;정영관;조현서
    • Journal of the Korean Institute of Landscape Architecture
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    • v.19 no.2
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    • pp.52-64
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    • 1991
  • The actual vegetation and environmental impact grade of Daekwanrim in Hamyang were investigated and the structure of the plant community was analyzed by the classification of TWINSPAN and three kinds of multivariate ordination (PCA, RA, DCA) techniques.Twenty-eight plots were set up by the clumped sampling method in June of 1990. Carpinus laxiflora and C. tschonoskii communities covered 38% and Quercus species communities covered 39% of the total rea. Environmental impact class 3 and 4 area. Twenty-eight plots were divided into three groups according to the degree of damage by TWINSPAN and ordination techniques. The dominant species in the shrub layer of the heavily damaged site and the light damaged site were Styrax japonica and Sasamorpha purporanscens, so the sucessional trends should be disturbed. As a result of the analysis for the relationship between the stand scores of DCA and the environmental impact class, they had a tendancy to increase from the light damaged to heavily damaged site.

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Analysis on the forest Community Structure of Daewon Valley in Chirisan national Park (지리산국립공원 대원사계곡의 삼림군집구조 분석)

  • 권전오
    • Korean Journal of Environment and Ecology
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    • v.13 no.4
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    • pp.354-366
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    • 2000
  • 지리산국립공원 대원계곡의 삼림군집구조를 분석하여 국립공원관리의 기초자료를 제공하기 위하여 기조사지역(이경재 등, 1991)이외의 지역에 대해 39개 조사지(100m2)를 설정하고 식생조사를 실시하였다 Classification의 한 기법인 TWINSPAN을 사용하여 군집을 분리하였으며 그 결과 느릅나무-굴참나무군집(군집 I) 졸참나무-굴참나무군집(군집II) 졸참나무군집(군집III-V) 신갈나무군집(군집VI) 그리고 서어나무-노각나무군집(군집VII)의 7개 군집으로 나뉘었다 각 군집에 대해 우점도 종다양도 유사도 종수 및 개체수 그리고 흉고직경 등의 분석을 통해 군집의 종조서을 살펴본 결과 지리산 대원계곡의 삼림은 졸참나무 굴참나무 신갈나무 등의 참나무가 주류를 이루고 있었으며 점차 서어나무와 노각나무등으로 천이가 진행되어갈 것으로 판단되었다.

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Plant Community Structure of Donghakas Valley in Kyeryongsan National Park (계룡산국립공원 동학사 계곡의 식물군집구조)

  • Han, Bong-Ho;Cho, Woo;Lee, Soo-Dong
    • Korean Journal of Environment and Ecology
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    • v.14 no.4
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    • pp.238-251
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    • 2001
  • 본 연구는 계룡산국립공원 동학사 계곡의 식물군집구조를 파악하기 위하여 실시되었으며, 10cm$\times$10m(100$\m^2$) 조사구를 52개 설정하여 식생조사를 실시하였다. 52개 조사구는 TWINSPAN에 의한 classifi-cation 분석과 DCA ordination 분석을 통하여 소나무군집(16개 조사구), 밤나무군집(4개 조사구), 신갈나무군집(5개 조사구), 졸참나무군집(13개 조사구), 느티나무군집(4개 군집), 서어나무군집(10개 조사구)으로 나누어졌다. 6개 군집의 천이경향을 살펴보면 소나무군집, 신갈나무군집, 졸참나무군집,느티나무군집은 각 층위별 안정된 층위구조로 현상태를 유지할 것이며, 밤나무구닙은 참나무류를 거쳐 서어나무로의 천이가 진행될 것으로 판단되었고, 서어나무군집은 졸참나무와 굴참나무군집으로 퇴행천이될 것이다. 6개 군집의 Shannon의 종다양도지수는 1.2732~1.4699이었다.

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