This study aims to show the changes of characteristics of vegetation structure for 20 years(1991~2010) in Naejangsan National Park. As a result of analysis of actual vegetation, the mixed community of Quercus variabilis and Quercus serrata was distributed with 56.1%, and Q. variabilis community showed in southern steep slope with 17.6%. Pinus densiflora community(5.8%) was observed on the ridge and Carpinu tschonoskii community distributed in the slope of the valley with 6.6%. Zelkova serrata and Prunus sargentii community were distributed in valley. The classification by TWINSPAN, ordination by DCA considering importance percentage and property of vegetation class were divided into 4 communities, which are community I(P. densiflora-Q. variabilis community), community II(Q. variabilis community), community III(C. tschonoskii community) and community IV(Mixed deciduous broad-leaved trees community). The age of Pinus densiflora was 32years old and Q. serrata was 36 years old in the community I, that of Q. variabilis was 64 years old in the community II, Q. serrata was 46 years old and C. tschonoskii was 45 years old in the community III, and Acer palmatum was 54 years old and Cornus controversa was 47 years old in the community IV. As the result of Shannon's index of species diversity, the community Iwas ranged from 0.9751 to 1.4199, community II was ranged from 1.0765 to 1.3278, community III was ranged from 1.0353 to 1.2881, and community IV was ranged from 1.1412 to 1.3807. The change of vegetation structure analyzed through the comparison with results of studies carried out 20 years ago were natural selection of P. densiflora, expansion of Quercus spp. and increase of C. tschonoskii. Especially, A. palmatum is dominated by Q. variabilis in canopy layer like the result of study 20 years ago. A. palmatum was analysed by 14.6% in the canopy layer of only mixed deciduous broad-leaved trees community. As a result of analysis of habitat property of Q. variabilis and A. palmatum, Q. variabilis was distributed in dry area with the low value of pH, O.M., exchangeable cations and Avail. P, and A. palmatum was located in the wet valley with huge value of nourishment. The tendency of reduction of bio-diversity by Sasa borealis is same as previous study but, the distributed areas were reduced in Naejangsan area.
In order to get as ecological basic data for river restoration, vegetation investigation was conducted in natural river and analysed it synecological methods, such as ordination cluster. 29 plant communities units were identified and the major dominant plant communites were Quercus mongolica community, Pinus densiflora community, Populus davidiana community, Q. variabilis community and Prunus sargentii community. River vegetations were classified into ravine and gorge forest type and riverine softwood forest type. Ravine and gorge forest was dominanted by hardwood which located in steep slope and in high elevation, and riverine softwood forest by softwood, salix spp. Naturality was an important criterion for the selection of rivers, so many of the selected rivers are located in the upper stream and mid stream rather than the lower stream, where more human intervention is involved. Plant communities were consisted of hardwood forest(44 plots, 92%) and softwood forest(4 plot, 8%), respectively. PCA with total layer data showed 5 groups of communities: Q. mongolica community group, Prunus sargentii community group, Pinus densiflora community group, Prunus sargentii community - Pinus densiflora community group and the rest communities group. PCA with tree layer showed 3 groups: Q. mongolica community group, Prunus sargentii community group, and the rest community group. Cluster analysis also a showed a similar communities group to PCA ordination, but Magnolia sieboldii community and Prunus sargentii community were distinguished from the PCA result. From the result, it can be concluded that the plant communities of riparian be divided into hardwood and softwood forest by statistical techniques. It was appropriate to plant species such as Quercus mongolica, Pinus densiflora, Populus davidiana, Quercus variabilis and Prunus sargentii, at levee zone and high water level. And Sliax spp. were appropriate for planted plants at waterfront and low water level. The herb species to be planted on the floodplain were recommanded in the species composition co-occurred with the woody species.
Weekly changes of water environments and phytoplankton community with the salinity gradients were investigated at Gyoungpo Lake from April to November in 1998 and 2012. Underwater crossam in Gyoungpo Lake was removed in 2004. Thereafter, average salinity of Gyoungpo lake increased from 7.5 ppt in 1998 to 20 ppt in 2012. A total of 99 and 80 species of phytoplankton was observed from the sampled in 1998 and 2012, respectively. The number of common species during the 2 separate years was 40. Transparency, SS, $NO_3-N$ concentration and N/P ratio in 2012 were lower than those in 1998. During the period of water shortage (April, May) of 2012 transparency decreased due to decreased salinity and increased SS and Chl. a. Correlation coefficients between species and community scores of DCA ordination based on data matrix of the phytoplankton revealed larger variation among sampling seasons in 1998 than in 2012. The increase of seawater influx and conversion rates following the removal of the underwater crossbeam might explain such a differential variation. Gymnodium sp., Peridinium sp., Prorocentrum sp., Nitzschia longissima, Schroederia setigera, Lyngbya sp., Asterococcus limneticus, Asterococcus superbus and Cyclotella meneghiniana were found to well adapt at the high salinities in 2012. Comparatively, Asterrionella formosa, Nitzschia frustulum, Chlorella ellipsoidea, Scenedesmus bijuga and Scenedesmus ellipsoideus were observed at lower salinities in 1998. Two quite contrasting phytoplankton communities were found in the two seasons of a year, spring with limited precipitation and summer, the flood season.
The purpose of this study was to classify the types of degraded areas of Mt. Jirisan section in Baekdudaegan and survey the actual condition of each damage type to use it as basic data for the direction of the restoration of damaged areas according to damage type based on the vegetation information of reference ecosystem. The analysis of the Mt. Jirisan section's actual degraded conditions showed that the total number of patches of degraded areas was 57, and the number of patches and size of degraded areas was higher at the low average altitude and gentle slope. Grasslands (deserted lands) and cultivated areas accounted for a high portion of the damage types, indicating that agricultural land use was a major damage factor. The survey on the conditions of 14 degraded areas showed that the types of damage were classified into the grassland, cultivated area, restoration area, logged-off land, and bare ground. The analysis of the degree of disturbance (the ratio of annual and biennial herb, urbanized index, and disturbance index) by each type showed that the simple single-layer vegetation structure mostly composed of the herbaceous and the degree of disturbance were high in the grassland and cultivated land. The double-layer vegetation structure appeared in the restoration area where the pine seedlings were planted, and the inflow of naturalized plants was especially high compared to other degraded areas due to disturbances caused by the restoration project and the nearby hiking trails. Although the inflow of naturalized plants was low because of high altitude in bare ground, the proportion of annual and biennial herb was high, indicating that all surveyed degraded areas were in early succession stages. The stand ordination by type of damage showed the restoration area on the I-axis, cultivated area, grassland, logged-off land, and bare ground in that order, indicating the arrangement by the damage type. Moreover, the stand ordination of the degraded areas and reference ecosystem based on floristic variation showed a clear difference in species composition. This study diagnosed the status of each damage type based on the reference ecosystem information according to the ecological restoration procedure and confirmed the difference in species composition between the diagnosis result and the reference ecosystem. These findings can be useful basic data for establishing the restoration goal and direction in the future.
Kim, Yong-Hoon;Kwon, Oh-Jung;Ban, Su-Hong;Oh, Choong-Hyeon
Korean Journal of Environment and Ecology
/
v.35
no.1
/
pp.68-80
/
2021
This study aimed to provide basic data such as the structure of the Carpinus turczaninowii community and characteristics of the habitat environment for ex situ conservation by analyzing the plant community structure of Carpinus turczaninowii, an island plant resource. For the community structure analysis, this study established 29 plots, sized 100㎡ each, in Seokmo, Yeongjong, Yeongheung, and Daebu islands. TWINSPAN was used for the classification of communities. The classification identified six communities. Group I was the C. turczaninowii-Quercus serrata community, group II was the C. turczaninowii-Pinus densiflora community, group III was the C. turczaninowii-Quercus mongolica community, group IV was the C. turczaninowii-Sorbus alnifolia community, group V was the C. turczaninowii typical community, and group VI was the C. turczaninowii-Quercus variabilis community. The species diversity was 0.90008~1.12868, the dominance was 0.17536~0.25665, and the similarity index was 17.1429~38.2979%. The result of correlation analysis of 7 environmental factors for 6 communities by RDA ordination showed a positive correlation between the crown density and litter layer and a negative correlation between the bare rock, soil hardness, and altitude on the 1st axis. On the 2nd axis, the bare rock and crown density showed a positive correlation, and the slope showed a negative correlation. In the C. turczaninowii-Quercus serrata community (I), the crown density and the litter layer were the environmental factors affecting the vegetation distribution. In the C. turczaninowii-Pinus densiflora (II) and C. turczaninowii-Quercus mongolica (III) communities, the slope was the factor affecting vegetation distribution. In the C. turczaninowii-Sorbus alnifolia (IV), C. turczaninowii typical (V), and C. turczaninowii-Quercus variabilis (VI) communities, the bare rock, altitude, and soil hardness were the factors affecting vegetation distribution.
This study was conducted to provide basic data on the structure of the Carpinus turczaninowii community and the characteristics of the habitat environment for ex situ conservation. To identify the current ecological environment, 27 plots (each measuring 100m2) were selected for analyzing the detailed structure of plant communities in Anmyondo Isl.(Jungjangri San 14-217), Hwanggumsan Mt., Gayasan Mt.(Wonhyobong) and Palbongsan Mt.. The research methodology employed in this study was qualitative analysis. The TWINSPAN classification yielded a total of seven distinct communities. Group I represents the C. turczaninowii - Quercus mongolica community, Group II represents the C. turczaninowii - Pinus densiflora community, Group III represents the C. turczaninowii - P. densiflora community, Group IV represents the C. turczaninowii - Q. mongolica community, Group V represents the C. turczaninowii - Q. variabilis community, Group VI represents the C. turczaninowii - Prunus serrulata Lindl. var. pubescens community, and Group VII represents the C. turczaninowii - Styrax japonicus community. The species diversity ranged from 0.8056 to 1.1568, the importance value ranged from 0.1214 to 0.3024, and the similarity index ranged from 9.37% to 36.36%. Based on the correlation analysis of six environmental factors for the seven communities using RDA ordination, the results indicate that on the first axis, Altitude, Crown density, Bare rock, and Slope exhibited a positive correlation. In the C. turczaninowii - P. densiflora community (Group III) and C. turczaninowii - Q. mongolica community (Group IV), altitude, bare rock, and slope were analyzed as factors influencing vegetation distribution. In the C. turczaninowii - Q. variabilis community (Group V), C. turczaninowii - P. serrulata Lindl. var. pubescens community (Group VI), and C. turczaninowii - S. japonicus community (Group VII), crown density was analyzed as a factor influencing vegetation distribution.
Journal of Korean Academy of Nursing Administration
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v.1
no.2
/
pp.285-324
/
1995
The purpose of this study was to describe the nature of nursing and life style of nurses. This study was conducted from march, 1994 to May, 1995. There are two kinds of data used in this research. To discern the nature of nursing and life style of nurses, 34 articles selected from nursing journals and text books, and the data which were collected by unstructured questionare with two main open ended questions were analyzed using Strauss and Corbin's method. The questions were "what is nature of nursing?" "When do you feel your professionl life worth?" 29 participants were nurses working at two university hospitals and two general hospitals in Seoul, understood the study purpose. The results were as follows : (1) The nursing is evolving phenomenon which is developed, and changed. (1) ${\lceil}$encounter${\rfloor}$${\lceil}$trust${\rfloor}$${\lceil}$interrelationship${\rfloor}$have been identified as the causal condition of nursing phenomenon. (2) ${\lceil}$concern${\rfloor}$has been identified as the central phenomenon of nursing. (3) ${\lceil}$humanity${\rfloor}$${\lceil}$sincerity${\rfloor}$${\lceil}$nursing spirit${\rfloor}$${\lceil}$empathy${\rfloor}$${\lceil}$understanding${\rfloor}$have been identified as intervening condition and context of nursing phenomenon. (4) ${\lceil}$helping behavior${\rfloor}$has been identified as action/strategy of nursing phenomenon. (5) ${\lceil}$caring${\rfloor}$${\lceil}$observation${\rfloor}$${\lceil}$comfort${\rfloor}$${\lceil}$problem solving${\rfloor}$${\lceil}$co-ordination${\rfloor}$${\lceil}$education${\rfloor}$${\lceil}$stimulus${\rfloor}$have been as helping behavior. (6) ${\lceil}$change${\rfloor}$${\lceil}$growth and development${\rfloor}$${\lceil}$to do by oneself${\rfloor}$ have been as consequences of nursing phenomenon. (2) the nature of nursing have been classified into five properties ; ${\lceil}$relational property${\rfloor}$${\lceil}$moral property${\rfloor}$${\lceil}$technological property${\rfloor}$${\lceil}$behavioral property${\rfloor}$${\lceil}$objective property${\rfloor}$ (3) The life style of nurses is not considered as ${\lceil}$to have${\rfloor}$ living mode, but ${\lceil}$to be${\rfloor}$ living mode because the professional life of nurses is chracterized by ${\lceil}$encounter${\rfloor}$${\lceil}$trust${\rfloor}$${\lceil}$humanity${\rfloor}$${\lceil}$understanding${\rfloor}$${\lceil}$concern${\rfloor}$${\lceil}$togetherness with human being${\rfloor}$${\lceil}$growth and development${\rfloor}$ and others, which are properties of the nature of nursing, and are also considered as esential factors of real existence of professional nurse as a human being in nursing situation.
This study was carried out to investigate vegetation structure and soil properties of Tilingia tsusimensis population found to be distributed in Mt. Gaya and Mt. Keumo. The Tilingia tsusimensis population was classified as Tilingia tsusimensis-typical dominant population and Tilingia tsusimensis-Thalictrum uchiyamai dominant population. It was found out that the organic matter content in the distributed areas for Tilingia tsusiensis population was $25.0{\sim}32.3%$; content of nitrate nitrogen was $0.83{\sim}1.04%;\;5.58{\sim}20.76\;ppm$ for available phosphorous; $46.3{\sim}62.9$ for CEC, and 4.5 to 5.1 for soil pH. The results of the correlation between Tilingia tsusimensis population and environmental factor are as follows; the Tilingia tsusimensis-typical dominant population was found in the areas of low elevation and had somewhat high interchangeable Na, Ca, Mg and CEC among nutrients; on the other hand, Tilingia tsusimensis-Thalictrum uchiyamai-dominant population was found in the areas of somewhat higher elevation and had a little lower interchangeable Na, Ca, Mg and CEC among nutrients than those of the Tilingia tsusimensis-typical dominant population.
This study was carried out to classify and describe the vegetation of algific talus in Korea by methods of the ZM school of Phytosociology. A part of slope or a hollow at the foot of talus in which cool air exhausts from underground through gaps of accumulated rock debris is called algific talus. From the sixty three stands obtained, the following two community and their four subcommunity were recognized: A. Quercus variabilis - Cystopteris fragilis com. B. Quercus mongolica - Betula schmidtii com. B-1. Quercus serrata - Urtica angustifolia subcom. B-2. Sorbus commixta - Spiraea chamaedryfolia subcom. B-3. Zabelia biflora - Astilboides tabularis subcom. B-4. Typical subcom. A. Quercus variabilis - Cystopteris fragilis com.. As a result of DCCA ordination, Quercus variabilis - Cystopteris fragilis com. has Quercus variabilis, Ligustrum var. obtusifolium, Zelkova serrata, Viburnum carlesii etc. as differential species, which showed the higher correlation with area of high Warmth index (WI) and precipitation than Quercus mongolica - Betula schmidtii com. has Quercus mongolica, Sorbaria var. sorbifolia, Magnolia sieboldii, Acer pseudosieboldianum, Rosa acicularis etc. as differential species. Sorbus commixta - Spiraea chamaedryfolia subcom. has Spiraea chamaedryfolia, Sorbus commixta, Rosa koreana, Vaccinium var. hirtum, Acer tegmentosum, Dryopteris expansa, Abies holophylla etc. as differential species. and Typical subcom in Quercus mongolica - Betula schmidtii com. were distributed in higher altitude and precipitation area than others. Zabelia biflora - Astilboides tabularis subcom. has Spiraea chinensis, Zabelia biflora, Astilboides tabularis, Gymnocarpium jessoense, Saussurea mongolica, Larix kaempferi etc. as differential species, which was distributed in area with high amounts of sunlight exposure by human activities.
Journal of the Korean Society of Marine Environment & Safety
/
v.19
no.2
/
pp.101-110
/
2013
In order to classify the trophic state and environmental quality of marine coastal system, an approach using the characteristics and biochemical composition in the sediments can be available. This research, including 25 coastal bay, belong to 131 stations, was carried out along the south coasts of Korea in February 2007. Type of sediment, total ogranic carbon, total nitrogen, phytopigments and biochemical composition(proteins, lipids, carbohydrates) were analyzed. Result from Multi-dimensional Scaling(MDS) ordination indicates that four group can be identified. The result of ANOVA with tukey test shows that the concentrations of proteins, carbohydrates and biopolymeric carbon were significantly different to four groups. We propose the trophic state classification for these groups using the biochemical composition of sediment organic matter. I group(Masan, Jinhae, Haengam) has been defined as hypertrophic state, II group(Tongyeong, Goseong;Jaran, Geoje et al.), as eutrophic; III group(Gamak, Deungnyang, Yeoja et al.), as mesotrophic and IV group(Sinan, Jindo, Muan), as oligotrophic. On the basis of results reported in this study, the biochemical composition of sediment organic matter could be considered an useful and sensitive tool for the classification of the trophic state of marine coastal systems.
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