• Journal of Ecology and Environment
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• 제31권4호
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• pp.297-307
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• 2008

In order to assess the effect of grazing on grasslands using floristic composition, we studied the floristic composition and plant biomass of steppe vegetation in Hulunbeier, Inner Mongolia. The dominant species of the grasslands were Stipa krylovii, Stipa grandis and Leymus chinensis. Floristic composition changed according to grazing pressure, being light, heavy and moderate. Under heavy grazing conditions, the importance value of P. acaulis, C. korshinskyi and Cleistogenes squarrosa increased in the plant community. These species were indicators of heavily grazed stand. Plant biomass of the stands ranged within 11.6g $m^{-2}$ and 63.5g $m^{-2}$ and 69.5g $m^{-2}$ and 166.2g $m^{-2}$ to the west and east of Lake Hulun, respectively. These values are equivalent to ca. $450{\sim}1,000kg$ of atmospheric carbon per hector, which is retained within the stand during the summer season.

• The Korean Journal of Ecology
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• 제18권2호
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• pp.275-283
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• 1995

Seral changes in floristic composition during abandoned field succession after shifting cultivation was investigated in eastern Kangwon-Do, Korea. According to the DCA ordination based on the floristic composition, sere of the dominant species was shown as follows: Digitaria sanguinalis, Persicaria spp., Commelina communis etc. in the annual stage (0∼1 years); Erigeron spp., Artemisia spp., Rubus crataegus etc. in the Erigeron-Artemisia stage (2∼6 years); Pinus densiflora, Salix spp., Miscanthus sinensis, Arundinella hirta etc. in the shrub - earlier tree stage (10∼25 years); P. densiflora, Quercus mongolica, Spodiopogon sibiricus etc. in the mid-tree stage (25∼50 years); Q. mongolica, Tripterigium regelii, Lespedeza maximowiczii, Carex siderosticta etc. in the latter tree stage (50∼80 years). In mid-tree stage, size-frequency distribution of P. densiflora was plotted as a platycurtic curve and that of Q. mongolica as a reverse J-shaped curve, which meant P. densiflora was thinned through interspecific competition and Q. mongolica was regenerated by itself in the later tree stage.

• Journal of Plant Biology
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• 제18권3호
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• pp.87-91
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• 1975

Dry matter production of herb community in the Central Korea was studied. Generally, the maximum standing crop in the Central Korea can be observed during the period from July through September with somewhat differences between the herb communities of different floristic composition. Differences in standing crop between the communities of similar floristic composition in different regiions were insignificant while those between different floristitc community were relatively great, ranging from 308.7 d.w.g/$m^2$ in Phragmites prosturatus community. It seems that regional difference in standing crop of herb community of the same floristic composition in the Central Korea is greatly influenced by grazing effect rather than any other conditions. The maximum leaf area index (LAI) of different herb communities was observed during the period from July through September, ranging from 3.0 in Plantago asiatica community to 16.0 in Phragnites longivalvis community.

• The Korean Journal of Ecology
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• 제20권1호
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• pp.15-25
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• 1997

The deciduous shrubs, Lindera sericea belonging to family Lauracea are distributed in Mt. Chogye and Mudeung locally. To estimate the community structure of this shrub, the relationship between the floristic composition and environmental factors of 20 sites in Mt. Chogye were investigated. L. sericea community distributed at the hum양 zone of altitude 305-480 m in ES and NE slope of $15~30^{\circ}$. The floristic composition of this communities consisted of 17-32 species varied with sites. Sasa borealis, Sapium japonicum, and Quercus serrata were the constant species over 90%. The forest vegetation was classified as Sasa borealis-Lindera sericea community, and the Sasa borealis-Meliosma oldhamii, and Sasa borealis-Callicarpa japonica were as subunit community. Acidity, organic matter content, inorganic phophate, potassium, calcium, magnesium, cation exchange capacity and conductivity were determined as environmental factors. Diameter of stem at ground surface and stem, distribution area and growth property of this plant were investigated, and this plant was presumed to be a relic endemic species.

• Plant Resources
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• 제4권1호
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• pp.59-64
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• 2001

This study was conducted to clarify the floristic composition and to investigate the landscape structure of habitats of Aconitum pseudo-leave var. erectum. A. pseudo-leave is designated an endemic plant in Korea. Floristic compositions of habitats were mainly composed of Quercus mongolica community. Other elements in this composition were Weigela subsessilis, Corylus sieboldiana and Cornus contioversa. Landscape ecological structure of habitats were defined by soils of mesic, loamy skeletal, slope of more than 60$^{\circ}$, sixty percent of woody coverage at 460-520m above the sea level and 25m away from drainage. Distribution patterns of A. pseudo-leave var. erectum plants in Taejon were presented on the 1km X 1km grid map.

• Plant Resources
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• 제7권1호
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• pp.22-28
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• 2004

The purposes of this study were to clarify of floristic composition and the landscape structure on the habitats of three Thalictrum plants, which were distributed in Daejeon, Korea. Floristic composition of habitats was organized by living in flatten open space needed a lot of sunlight and humidity. Landscape ecological structure of habitats was defined by soils of loamy skeletal mesic, slope between 25 to 30$^{\circ}$ Vegetation rating was 75 percent of woody coverage at less than 450 m above the sea levels, respectively. Distribution patterns of Thalictrum plants in Daejeon were presented on the 1 km X 1 km grid map.

• Ecology and Resilient Infrastructure
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• 제5권2호
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• pp.94-104
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• 2018

The Soyangho Reservoir in Korea has a large drawdown zone, with an annual maximum water level fluctuation of 37 m due to dam operations to maintain a stable water supply and control flooding, especially during the monsoon period. The floristic composition, distribution and biomass of the major plant communities in the drawdown zone of the Soyangho Reservoir were assessed in order to understand their responses to the wide water level fluctuation. Species richness of vascular plants was low, and species composition was dominated by herbaceous annuals. Principal coordinates analysis using both flora and environmental data identified slope angle and the distance from the dam as important factors determining floristic composition. The species richness was low in the steep drawdown zone close to the dam, where much of the soil surface was almost devoid of vegetation. In shallower slopes, distant from the dam plant communities composed of mainly annuals were found. The large fluctuation in water level exposed soil where these annuals could establish. An overall biomass of 122 t (metric tons) Dry Matter was estimated for the reservoir, containing ca 3.6 t N (nitrogen) and ca 0.3 t P (phosphorus); the role of the vegetation of the drawdown zone in carbon sequestration and water pollution were briefly discussed.

• 한국산림과학회지
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• 제110권4호
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• pp.530-542
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• 2021

백두대간 보호지역 일본잎갈나무림의 생태적 관리를 위한 기본 단위 설정을 위하여 총 119개 조사구에서 수집한 식생 정보를 바탕으로 TWINSPAN과 DCA ordination 분석을 통하여 현존식생의 유형을 분류하고 그 공간 배열 상태를 파악, 기술하였다. 현존식생 유형은 신갈나무-철쭉형, 신갈나무-조록싸리형, 층층나무-산뽕나무형, 신갈나무-까치박달형, 비목나무-찔레꽃형, 졸참나무-산초나무형, 졸참나무-조릿대형 등 총 7개 유형이 도출되었고 대개 위도, 해발고도, 성립 기간, 시업 이력, 주변 임분 특성, 교란 정도 등에 따른 종조성적 차이를 반영하고 있었다. 또한 일본잎갈나무림과 주변 잠재자연식생(신갈나무림와 졸참나무림)의 종구성적 유사성을 Jaccard 계수에 의해 비교한 결과, 식생유형 간 다소 차이가 있지만 신갈나무림과는 평균 0.21, 졸참나무림과는 평균 0.32로 나타나 아직 전반적으로 종구성이 이질적인 경향이었다.

• 한국산림과학회지
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• 제106권2호
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• pp.169-185
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• 2017

산림식생은 분류방법에 따라 식생유형의 결과가 다를 수 있다. 본 연구의 목적은 세 종류의 식생분류 방법론을 적용하여 결과를 비교하기 위해 충남 오서산 산림식생을 대상으로 2016년 9월부터 10월까지 총 80개소의 식생조사를 수행하였다. 얻어진 자료를 토대로 상관우점종에 의한 군락유형분류, 종조성에 따른 군락유형분류, 종간연관 분석을 실시하였다. 상관우점종에 의한 군락유형분류를 실시한 결과, 소나무군락, 신갈나무군락, 느티나무군락, 상수리나무군락, 층층나무군락, 졸참나무군락, 일본잎갈나무군락, 리기다소나무군락, 밤나무군락, 백합나무군락의 총 10개의 군락유형으로 구분되었다. 종조성에 따른 유형분류를 실시한 결과, 총 4개의 식생단위와 8개의 종군 유형으로 분류되었다. 종조성 체계의 최상위 수준에서 비목나무군락군으로 대표되어졌으며, 비목나무군락군은 진달래군락(진달래전형군, 쪽동백나무군), 느티나무군락(일본잎갈나무군, 큰개별꽃군)으로 분류되어, 1개 군락군 2개 군락 2개 군의 분류체계를 나타냈다. 종간연관 분석 결과는 크게 두 개의 그룹으로 나누어졌으며, 종조성에 의한 군락유형과 종간연관에 의한 유형은 지형적인 영향이 크게 작용하는 것으로 판단되었다. 조사지의 산림식생은 상관우점종에 의해 10개의 군락유형, 종조성에 의해 8개의 종군단위와 4개의 식생단위, 종간연관에 의해 2개의 유형으로 분류되어, 상관우점종, 종조성(종군유형${\rightarrow}$식생단위), 종간연관 순으로 식생단위가 단순화되는 것을 알 수 있었다. 결론적으로 산림식생은 분류방법론에 따라 다양한 식생유형이 분류되었고 또한 많은 환경요인들의 영향이 작용하고 있는 것으로 판단되었다.

• The Korean Journal of Ecology
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• 제10권2호
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• pp.53-62
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• 1987

Floristic composition and vertical distribution of Mt. Daedun (western slope) were investigated from 1985 to 1986. The results are as follows; 108 families, 346 genera, 511 species, 2 subspecies, 75 varieties, 5 forma or 593 taxa including 77 cultivars. The floral data showed the ecological characteristics such as the value 346 in Fisher's Index, H-D1-H5 in biological type, 10.9% in urban index of naturalized plants and 60.5% in erect form growth form. Based on the physiognomy and population density of dominant tree species the forest vegetation of Mt. Daedun (western slope) was classified into 5 types; Quercus mongolica forest and Q. variabilis forest at 800m above, Carpinys laxiflora forest and Acer mono forest at 700m to 800m and Sapium japonicum forest at 500m to 800m in altitude. And Lindera erythrocarpa forest and zelkova serrata forest are widely distributed at 400m to 800m in altityde along valley and at mountain foot area.