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Forest vegetation structure of Bogd Khan Mountain: A Strictly Protected Area in Mongolia
Badamtsetseg BAZARRAGCHAA,김현숙,Gantuya BATDELGER,Munkhjin Batkhuu,이상명,Seungah Yang,백운기,이중구 국립중앙과학관 2022 Journal of Asia-Pacific Biodiversity Vol.15 No.2
Bogd Khan Mountain is a strictly protected area located in the Khentei mountain range. It lies in the transitional zone of the Siberian coniferous taiga and the Asian steppe and has a unique ecosystem. The present study was conducted with the objective of identifying the plant community type, forest structure, and the changes in forest stands of the Bogd Khan Mountain. Sampling was done at 155 plots randomly along the gradients of the entire forest. Differences in species composition, biological spectrum, species diversity, and importance value were analyzed in each community. This study revealed the occurrence of six plant community types comparing of Larix sibirica, Picea obovata, Pinus sibirica, Betula pendula subsp. mandshurica, Pinus sylvestris and Populus tremula. These communities were different in species richness, diversity, and their distribution correlated to the altitudinal gradient (score 0.71735; p value 0.001). An upsurge in Picea obovata, and Betula pendula subsp. mandshurica community was found, indicating changes in the ecosystem such as permafrost melting, caused by anthropogenic influences. We suggest preserving the main dominant tree species in the native communities and reduction of the anthropogenic impacts urgently for the effective management of the biodiversity of the Bogd Khan Mountain.
An updated taxonomy of the family Linderniaceae in Korea
Badamtsetseg BAZARRAGCHAA,양승아,김현숙,이상진,이중구 충남대학교 농업과학연구소 2019 Korean Journal of Agricultural Science Vol.46 No.4
In the present study, according to morphological observations followed by recent circumscriptions, we have classified the Korean taxa of the family Linderniaceae into Scrophulariaceae sensu lato has been considered in several works, though the taxa have remained undefined because identification work was mostly done according to vegetative morphological features, such as the leaf shape, leaf margins, and leaf venation. The taxa of Linderniaceae are mostly considered to be weeds and, for correct identification, it is necessary to clarify their taxonomic characteristics. Morphological studies were carried out using samples collected in the field. Micro-morphological observations of the vegetative and floral parts were also performed using light microscopy (LM) and scanning electron microscopy (SEM). We concluded that important characteristics are reproductive morphologies viz. calyx, stamen structure, capsule shape, calyx ratio with capsule, inflorescence morphology, and seed morphology. As a result, we formulated taxa descriptions and provided a key of the genera of Linderniaceae in Korea. Lindernia crustacea (L.) F. Muell. is transferred to Torenia crustacea (L.) Cham. & Schltdl. Lindernia micrantha D. Don and L. angustifolia (Benth.) Wettstein are a synonym of Vandellia micrantha (D. Don) Eb. Fisch., Schäferh. & Kai Müll. Lindernia attenuata Muhl. and L. dubia var. major (Pursh) Pennell are a synonym of Lindernia dubia (L.). Lindernia verbenifolia (Colsm.) Pennell is a synonym of Bonnaya antipoda Druce. Our study reports the presence of four genera: Bonnaya, Lindernia, Torenia, and Vandellia, comprising six taxa under the family Linderniaceae in Korea.
Scutellaria krasevii Kom. & I. Schischk. ex Juz. (Lamiaceae): a new record species from Mongolia
Badamtsetseg BAZARRAGCHAA,Gantuya BATDELGER,Darijmaa SHAGDAR,백운기,이중구 한국식물분류학회 2019 식물 분류학회지 Vol.49 No.2
We report Scutellaria krasevii Kom. & I. Schischk. ex Juz. (subfamily Scutellarioideae, family Lamiaceae) as a new recorded species of Mongolia. This species is morphologically similar to S. galericulata but can be differentiated by the presence of comparatively thick and triangular-cordate leaves having a heteromerously deep-crenate margin, a densely reclinate pubescent stem, and a densely pubescent corolla. A taxonomic description, a key to the genus in Mongolia, habit photographs, and scanning electron photomicrographs of nutlets are provided for species identification. We also present a table for a comparison of the diagnostic characteristics with those of related species. This species grows along the banks of the Unit river, Khutag-Undur soum, Bulgan province, Mongolia, approximately 2,300 km far away from the type locality in Russia.
Pollen Morphology of the Family Lamiaceae in Mongolia
Badamtsetseg, Bazarragchaa,Lee, Sang-Myoung,Lee, Hwa-Yuon National Science Museum of Korea 2012 Journal of Korean nature Vol.5 No.2
Pollen morphology of 21 taxa belonging to 16 genera of the subfamilies: Ajugoideae, Scutellarioideae, Nepetoideae and Lamioideae from Mongolia were studied using scanning electron microscope (SEM). Pollen morphology in the family Lamiaceae pollen showed considerable variation in size (very small, small, medium to big), shape (prolate-spheroidal, subprolate to prolate) and exine ornamentation (tricolpate and hexacolpate; tuberculate, microreticulate, bireticulate or polish). Our study suggests pollen characters could be a useful tool to differentiate varies between genera in the family Lamiaceae. The tricolpate pollen were found in the genera belonging to subfamilies Ajugoideae, Scutellarioideae, Lamioideae, whereas, hexacolpate pollen were found in genera belonging to the subfamily Nepetoideae.
Vegetation community classification of the Sanzai area in Mongolia
김현숙,Badamtsetseg BAZARRAGCHAA,이상명,Gantuya BATDELGER,박관수,이중구 국립중앙과학관 2021 Journal of Asia-Pacific Biodiversity Vol.14 No.2
This study reports the forest vegetation community classification of the Sanzai area (Khentii range) inMongolia using the phytosociological method. The forest vegetation has been classified into five majortypes characterized by the following associations: Larix sibirica community, Pinus sylvestris community,Betula fusca-Picea obovata community, Betula platyphylla community, and Pinus sibirica community. Ecological characteristics such as species composition, layer structure, vegetation ratio, and the distributionof individual trees based on their diameter at breast height (DBH) are slightly different among theplant communities. In all communities, the significant value was highest in the Larix sibirica with 74.6%,followed by Pinus sibirica (64.2%), Betula platyphylla (59.5%), Pinus sylvestris (53.9%), and Picea obovata(47.7%). Our results of DBH analysis show that the size-frequency distribution of Pinus sylvestris, Pinussibirica, Larix sibirica, and Picea obovata was a binomial distribution in all the communities, suggestingthat for the time being, these species dominate continuously. In addition, it is likely that Betula platyphyllawill dominate rapidly because of its higher frequency of young individuals. This indicates theforest condition impairment in the forest of the Sanzai area.
Vegetation community composition and changes of Jinaksan (Mt.) in Korea
양승아,이미라,Badamtsetseg Bazarragchaa,김현숙,이상명,이중구 충남대학교 농업과학연구소 2023 Korean Journal of Agricultural Science Vol.50 No.2
This study investigated 62 nested quadrat plots of Jinaksan to identify community classification and changes of the vegetation by using the phytosocial method and analyzed importance values. Vegetation types were classified into 8 communities: Quercus mongolica community, Q. variableis community, Q. aliena community, Pinus densiflora, Q. acutissima, Zelkova serrata, Carpinis laxiflora, and C. tschonoskii. The significance value was highest in Q. mongolica (62.75) followed by P. densiflora (55.16), Q. variabilis community (25.03), Z. serrata (22.17), Q. aliena (18.30), Prunus serrulata var. pubescens (16.86), C. laxiflora (13.25), Q. acutissima (10.72), C. tschonoskii (10.08), Q. serrata (8.02), Fraxinus sieboldiana (6.93), Acer pseudosieboldianum (6.73), and Styrax obassis (5.73). Quercus mongolica displayed a stable distribution pattern, presenting a reverse J-shaped curve from the diameter at breast height (DBH) analysis, and it was judged that current state would be maintained for a certain period. In addition, P. densiflora is expected to dominate for the time being and Quercus species are expected to gradually decrease.