• Journal of Forest and Environmental Science
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• 제31권1호
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• pp.7-13
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• 2015

Forest disturbance sometime considered as a tool of management as it believed that mid level disturbance constructs better micro-climatic conditions which ultimately boost up the plant diversity. The effect of different levels of disturbance on species composition and regeneration is very important. Present attempt was carried out in a temperate evergreen oak forest which was under various degree of disturbance. The study area is one of the large ranges of oak forest in Garhwal Himalaya and compensating various types of daily needs of local people. On the basis of IVI values Quercus leucotrichophora holds first position in all the disturbance zones whereas Myrica esculenta upgraded it's rank in highly disturbed zone and showed less impacted species by disturbance. Berberis aristata and Eupatorium adenophorum in shrub layer and Anaphalis adnata and Bidens pilosa in herb layer were found as disturbance friendly species because they attained higher rank in highly disturbed zone whereas Caryopteris foetida was found disturbance-sensitive in shrub layer. The banj oak regenerated well under mid disturbance as compared to no and high degree of disturbance and a sharp downfall in the species diversity was recorded with increasing magnitude of disturbance. Density-diameter curves showed a reverse trend of lower density in higher girth classes. The results of the study should be useful for the forest management strategies.

• 식물분류학회지
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• 제51권4호
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• pp.345-352
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• 2021

Diarthron linifolium Turcz. is an annual herb usually found in sandy soil or limestone areas. Plants in the genus Diarthron are known to have toxic chemicals that may, however, be potentially useful as an anticancer treatment. Diarthron linifolium is a unique species among the species of the genus distributed in Korea. Here, we determine the genetic variation of D. linifolium collected in Korea with a full chloroplast genome and investigate its evolutionary status by means of a phylogenetic analysis. The chloroplast genome of Korean D. linifolium has a total length of 172,644 bp with four subregions; 86,158 bp of large single copy and 2,858 bp of small single copy (SSC) regions are separated by 41,814 bp of inverted repeat (IR) regions. We found that the SSC region of D. linifolium is considerably short but that IRs are relatively long in comparison with other chloroplast genomes. Various simple sequence repeats were identified, and our nucleotide diversity analysis suggested potential marker regions near ndhF. The phylogenetic analysis indicated that D. linifolium from Korea is a sister to the group of Daphne species.

• 한국환경과학회지
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• 제32권5호
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• pp.329-341
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• 2023

We surveyed the vegetation of an ecological landscape preservation area (legally protected conservation areas or national parks) and the surrounding areas of Mt. Cheonggye, Republic of Korea, to explore the conservation implications for preservation areas and surrounding transition areas. We calculated diversity indices to identify the properties of the preservation and surrounding areas that are relevant to conservation efforts. We then compared the plant community composition between the areas using field and quadrat surveys in the preservation and surrounding areas. The cover of the dominant species in all tree and herb layers was markedly higher in the preservation area than in the peripheral zones. The species richness indices were significantly higher in the preservation area than in the peripheral zones. Ordination using detrended canonical correspondence analyses showed that the cover of the dominant tree species and rocks could explain the distribution of plant species in the Cartesian space of the ordination. Our results demonstrate that physiognomically designated protected areas match well with ecological data based on diversity indices and ordination analyses and that disturbances in the areas surrounding the ecological landscape of preservation areas can have considerable impacts on plant diversity indices. Hence, the preservation and management of surrounding areas are essential conservation elements for protecting the entire ecological landscape of preservation areas.

• 한국산림과학회지
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• 제106권2호
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• pp.150-168
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• 2017

이 연구는 2000년도 동해안 산불이 발생한 강원도 삼척 비화진 유역을 대상으로 2003년도와 2014년도의 식물사회학적 식생유형분류, 층위별 중요치, 종다양도, 군락유사도 분석을 통해 임분 구조 변화를 구명하기 위하여 32개소의 식생조사를 각각 실시하였다. 식생유형분류 결과, 7개의 식생단위에서 4개의 식생단위로 감소하였으며, 11개의 종군에서 7개의 종군으로 감소하였다. 중요치 분석 결과, 교목층에서 신갈나무(Quercus mongolica), 졸참나무(Q. serrata), 굴참나무(Q. variabilis)가 각각 6.8%, 5.2%, 2.9% 증가하였으며, 소나무(Pinus densiflora)가 각각 2.8%로 가장 많이 감소하였으며 밤나무(Castanea crenata), 이팝나무(Chionanthus retusa), 살구나무(Prunus armeniaca var. ansu), 복자기(Acer triflorum), 모감주나무(Koelreuteria paniculata) 등 대부분의 조림 수종들의 중요치가 감소되었다. 종다양도의 경우, 교목층에서 0.252에서 0.287로 증가하였고, 아교목층에서 0.252에서 0.434로 증가하였고, 관목층에서 1.293에서 1.333으로 증가하였지만 초본층에서는 1.745에서 1.646으로 감소하였다. 군락유사도의 경우, 각 층위별로 0.78, 0.65, 0.72, 0.55로 나타나 초본층의 변화가 가장 심하였다. 결론적으로 본 연구는 이 조사지와 유사한 산불피해지의 생태계 진단 및 관리를 위한 기초자료로 활용될 것으로 판단된다.

• Journal of Ecology and Environment
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• 제42권2호
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• pp.70-76
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• 2018

Background: Sasa borealis (Hack.) Makino, a clonal dwarf bamboo, is widespread in Korean forests. Although S. borealis is native to that country, its growth habit can cause considerable harm when occupying particular areas where it dominates and influences those forested communities. However, few reports have described the extent of its inhibitory effects on the vigor of co-existing plant species. Therefore, we investigated the distribution, abundance, and diversity of other plant species in the communities where this plant occurs in the east-central forests on the Korean Peninsula. Results: S. borealis was most commonly found at an elevational range of 800 to 1,200 m, on gentle, usually lower, and near valley northern slopes. Out of the 13 forest communities based on 447 forest stands that we surveyed, S. borealis was detected in eight communities, mostly where Quercus mongolica dominates. In particular, it was more common in late-successional mixed stands of Q. mongolica, other deciduous species, and the coniferous Abies holophylla. Because of their ability to expand rapidly in the forest, this plant covered more than 50% of the surface in most of our research plots. Species diversity declined significantly (F = 78.7, p = 0.000) as the abundance of S. borealis increased in the herb stratum. The same trend was noted for the total number of species (F = 18.1, p = 0.000) and species evenness (F = 91.5, p = 0.000). Conclusions: These findings clearly demonstrate that S. borealis is a weed pest and severely hinders species diversity. Authorities should be implementing various measures for ecological control to take advantage of declining chance after the recent synchronized massive flowering of S. borealis.

• The Korean Journal of Ecology
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• 제18권3호
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• pp.307-321
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• 1995

Division of ecoregions having respective functions was attempted through quantitative and qualitative analysis on vegetation diversity, and heterogeneity and on soil environment of the study sites. Field research was carried out in a square of 81 ㎢ around Andongpo (126°38'E, 37°30'N), Kimpo-gun, Kyonggi provice. Conventional methods applied are as follows: classical syntaxonomy by the Zurich-Montpellier School, interpolation method to determine the degree of diversity, heterogeneity and distribution pattern of vegetation, and correlation analysis between soil properties and plant communities. 41 plant communities were identified and composed of 6 forests, 4 mantle and 31 herb communities including 6 saltmarsh plant communities. In a mesh, number of plant communities was highly correlated to the number of species. The highest number of plant community and species was 25 communities·km-2·mesh-1 and 381 species· km-2·mesh-1 ,and the highest value of vegetation heterogeneity was 28.1 species· community-1·mesh-1. Their lowest numbers were 4 communities·km-2·mesh-1. and 28 species·km-2·mesh-1. and 7 species·community-1·mesh-1, respectively. Contour map on vegetation diversity and heterogeneity enabled us to establish two regions; coastal and inland vegetation. Isoline 〔150〕,〔10〕and〔10〕and〔15〕on the species diversity, the community diversity and the vegetation heterogeneity, respectively, were regarded as ecolines in the study area. Cl- content was recognized as the most important factor from correlation analysis between soil properties. Ordination of sites indicated that the study area be divided into two edaphic types: inland and coastal habitats. It was considered that the extent of desalinization in soil played a major role in determining the species composition in the reclamed area. By matching edaphic division of habitats with division of vegetation structures, designation of ecoregion was endorsed. The approach of current study was suggested as an effective tool to implement an assessment of the vegetation dynamics by the disparity of natural environment and anthropogenic interferences.

• 한국환경생태학회지
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• 제12권3호
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• pp.224-235
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• 1998

본 조사는 1997년 6월부터 1998년 6월까지 4회에 걸쳐 조사된 경포대 일대의 관속식물 종조성과 우점종군을 분석한 결과이다. 그 결과 본 지역에서 조사된 관속식물은 87과 240속 281종 51변종 7품종으로 총 339종류가 조사되었으며, 이중 노랑갈퀴, 오동나무(재), 개쑥부쟁이 등 3종은 한국특산종이다. 양치식물계수는 0.61로 나타났으며 귀화식물은 12종류로 이는 우리나라 귀화식물 218종류의 5.5%에 해당한다. 우점종은 해송과 소나무로 대표되었으며 교목층과 아교목층은 소나무와 해송, 관목층은 해송, 소나무, 산벗나무, 초본층은 큰기름 새, 김의털, 장구채, 쑥, 애기수영, 닭의장풀, 털질경이 등이 우점하였고, 전체적으로는 아교목층과 관목층이 매우 빈약한 불안정한 임상구조를 갖는 것으로 나타났다.

• 한국농림기상학회지
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• 제6권1호
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• pp.30-37
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• 2004

천연생 주목군락의 구조적 특성을 이해하기 위하여 함백산의 분포지를 중심으로 조사구를 설치하여 조사, 분석한 결과 다음과 같은 결론을 얻을 수 있었다. 천연 주목군락은 전체적인 계층별 종조성으로 볼 때, 함백산에 있어서 주목-시닥나무- 미역줄나무-큰개별꽃의 군락을 조성하는 특성을 갖고 있었다. 조사구 내에 출현한 총 종수는 109개종(목본식물 40종, 초본식물 69종)이었다. 교목층과 아교목층에서는 각각 주목과 시닥나무가 우점종이었으며, 교목층의 주요 구성종으로는 주목, 미역줄나무, 분비나무, 시닥나무, 사스래나무, 신갈나무, 고로쇠나무, 구상나무, 아교목층의 주요 구성종은 시닥나무, 나래회나무, 미역줄나무, 마가목, 당단풍, 회나무, 주목, 신갈나무 등이었다. 관목층에서는 미역줄나무가 우점종으로서 나타났으며, 주요 구성종은 미역줄나무, 붉은병꽃나무, 시닥나무, 나래회나무, 물참대, 함박꽃나무, 괴불나무 등이었다. 초본층에서는 큰개별꽃이 우점종_으로 출현하였다. 조사구 구성종에 대한 생물형은 Ph-D$_1$-R$_{5}$-e 형을 나타내었다. 조사지역의 교목층과 아교목층에 대한 흉고직경급 분석 결과 주목 천연림 군락은 장래 신갈나무를 중심으로 한 음수 교목성 수종에 의해 천이가 진행될 것으로 예상되며, 또한 미역줄나무와 같은 덩굴성 수종이 방해수종으로 존재하고 있으므로 천연림 보육 작업과 같은 대책 마련이 시급히 요구된다.

• 식물분류학회지
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• 제41권3호
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• pp.242-245
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• 2011

In this study, we described and illustrated an unrecorded species from the Korean flora, Sciaphila nana Blume, which is included in the order Pandanales and the family Triuridaceae. This taxon was found at Mul Oreum in Namwon-eup, Seogwipo-si, Jeju Special Self-Governing Province for the first time in Korea. The order Pandanales can be distinguished from the order Liliales by the anomocytic or tetracytic stomata and syncarpous or apocarpous gynoecia of the Pandanales. The family Triuridaceae and the other four taxa in the Pandanales, Cyclanthaceae, Pandanaceae, Stemonaceae, and Velloziaceae, are easily distinguished because the Triuridaceae are microtrophic herbs with scaly leaves. S. nana has a subulate style with a glabrous apex, ovate to narrow ovate leaves and bracts, male perianth segments with a knob-like structure at the apex, and a dimorphic perianth. Therefore, it is easily distinguished from S. tenella, S. multiflora, S. secundiflora, S. thaidanica, S. ramosa, and S. arfakiana.

• The Korean Journal of Ecology
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• 제14권2호
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• pp.195-210
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• 1991

The primary succession of the pebble area in gye-bang chon, an upper stream bank of north han river, was investigated by belt transect method from July to October 1990. The stsges of bare area, herbaceous pioneer, perenial herb, woody plants and pine stand were recognized from stream bank to inland. The change of the coverage in herbaceous plants increased with developing sueccessional sere but decreaser with increment of woody plants. The species sequence cyrves vs. relative coverage were geometric in pioneer stage and graduaiiy changed to lognormal y\type as the development of forest. The species diversity was highest during then woody plants stage, probably it would to be the edge effect. The soil properties were not noticeable difference between stream side and inland side. It seems that the vegetational developement was not enough to affect soil accumulation.