• 제목/요약/키워드: Coniferous forests

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Landsat Thematic Mapper 화상자료를 이용한 월악산 지역 산림식생의 무감독분류 (Unsupervised Classification of Forest Vegetation in the Mt. Wolak Experimental Forest Using Landsat Thematic Mapper Data)

  • 이상희;박재현;이준우;김재수
    • 한국환경복원기술학회지
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    • 제4권2호
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    • pp.36-44
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    • 2001
  • The main purpose of this study was to classify forest vegetation effectively using Landsat Thematic Mapper data(June, 1994) in mountainous region. The research area was the Mt. Wolak Experimental Forest of Chungbuk National University, near Chungju and Jecheon city, Chungcheongbuk-do. To classify forest vegetation effectively, Normalized Difference Vegetation Index(NDVI) was used to reduce topographic effects. This NDVI was modified and transformed to the value of 0 to 255, and then the modified values were combined with other Landsat Thematic Mapper bands. To classify forest and land cover types, unsupervised classification method was used. The results of this study are summarized as follows. 1. Combinations of band "3, 5, NDVI" in Landsat Thematic Mapper data showed a good separation with high accuracy. The expected classification accuracy was 95.1% in Landsat Thematic Mapper data. 2. The Land Cover types were classified into six groups : coniferous forest, deciduous forest, mixed forest, paddy and grass, non-forest, and other undetectable areas. As these classified results were compared with the reconnaissance survey and aerial black and white infrared photographs, the overall classification accuracy was 76.5% in Landsat Thematic Mapper data. 3. The portion of non-forest in Mt. Wolak area was 1.9%. The percentages of coniferous, deciduous and mixed forests were 30.9%, 35.7% and 26.4%, respectively. 4. As these classified results were compared with other reference data, the percentages of coniferous, deciduous and mixed forests increased, but the portion of non-forest was exceedingly diminished. These differences are thought to be from the different research method and the different season of received Landsat Thematic Mapper data.

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Vertical Distribution of Foraging Tits in Mixed Species Flocks in Urban Forests

  • Lee, Sang-Don
    • The Korean Journal of Ecology
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    • 제22권2호
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    • pp.65-68
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    • 1999
  • In December-January of 1996-1997 and 1997-1998, information was gathered about vertical distribution of foraging sites of tits in 34 flocks in coniferous and deciduous forests. There was a significant effect of forest type on the distribution of foraging sites of each species. Habitat was classified into 5 height layers vertically: ground, bushes (usually<1.5 m, up to 3 m), tree layer 1 (up to 1/3 of tree height), tree layer 2 (1/3-2/3 tree height). and tree layer 3 (>2/3 tree height). There were differences among species: great tit (Parus major) foraged mostly on the ground, coal tit (P. ater) and long-tailed tit (Acrocephalus caudatus) - on the highest tree layer, marsh tit (P. palustris) was often seen on bushes, and varied tit (P. varius) - in tree layer 2. Smaller species used upper and outer parts of trees. suggesting that, like in most other similar studies. larger dominant species prevented smaller species from using inner parts of trees.

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서울대 광양연습림내 토양 미소 절지동물에 관한 연구 - 2. 개체군밀도와 생물량 (Soil Microarthropods at the Kwangyang Experiment Plantation(2. Population Density and Biomass of Soil Microarthropods)

  • Kwak, Joon-Soo;Park, Seong-Sik;Kim, Tae-Heung
    • The Korean Journal of Ecology
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    • 제12권3호
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    • pp.183-190
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    • 1989
  • This study was carried out to investigate the population density and biomass of soil microarthropods in the forests with different flora. soil microarthropods of 29,475 individuals were identified into 6 different classes, and 18 different orders. Acarina were the most numerous with abundance of 74.8% followed by 17.9% of Collembola, comprising 92.7% of arthropod fauna. Similar dominance of the two groups was found also in biomass although the level reaching no more than 63.9%. The A/C ratio in the broad-leaved forests are higher than that in the coniferous forests.

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다중시기 위성영상과 ASTER DEM자료를 이용한 충남해안지역의 임상 변화 분석 (Analysing of Forest Types in Chungnam Coastal area Using Multi-Temporal Satellite imagery and ASTER DEM Data)

  • 김장수;장동호
    • 한국지형학회지
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    • 제19권1호
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    • pp.69-81
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    • 2012
  • 본 연구는 다중시기 위성영상과 ASTER DEM을 이용하여 기후변화에 따른 충남해안지역의 임상변화와 지형인자와의 관계를 분석하였다. 연구결과, 침엽수림 감소율은 550m까지 지속적으로 증가하다 550m 이상부터는 그 감소율이 떨어지고 있는 것으로 나타났다. 다음으로 혼효림의 변화율을 살펴보면 50m 이하에서는 감소하고 있는 것으로 나타났다. 그러나 50m 이상에서부터 700m까지 혼효림의 변화율이 증가하는 경향을 보이다, 700m 이상에서 급감하고 있는 것으로 나타났다. 마지막으로 활엽수림의 변화율을 살펴보면, 전 고도에서 비율이 증가하고 있는 것으로 나타났다. 특히 550m 이상의 구간부터는 급격한 증가세를 보이고 있는 것으로 나타났다. 사면향에 따른 임상 분포면적 변화를 살펴보면 침엽수림의 경우 전 사면향에서 감소율을 보였는데, 북향과 북서향, 서향, 북동향에서 감소율이 높은 것으로 나타났다. 혼효림의 경우 북서향과 북향, 서향에서 높은 증가율을 보인 반면, 동향과 남동향에서는 약간의 감소율을 나타내었다. 활엽수림의 경우 전 사면향에서 증가율을 보였지만 특히 동향, 남동향, 북동향, 남향에서 높은 증가율을 보였다.

금원산 자연휴양림 내 들쥐류의 종 분포 및 특성 (Species Distribution and Characteristics of Wild Mice in Mt. Keumwon Recreational Forests)

  • 이총규;강영민
    • Journal of Forest and Environmental Science
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    • 제30권1호
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    • pp.161-166
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    • 2014
  • To provide basic information for wildlife management, we investigated the distribution and ecology of wild mice in Mt. Keumwon recreational forests. The trapped wild mice were a total of 4 species such as Eothenomys regulus, Apodemus speciosus peninsulae, Apodemus agarius, and Crocidura suaveolens. A total of 79 individuals from four species were trapped. Number of Eothenomys regulus was the highest as 41 individuals followed by Apodemus speciosus peninsulae of 31 individuals, Apodemus agarius of 4 individuals, and Crocidura suaveolens of 4 individuals. Depending on forest type, 51 individuals were captured in broad-leaved forests, whereas 28 individuals were captured in coniferous forests. Average weight of the trapped Eothenomys regulus, Apodemus speciosus peninsulae, Apodemus agarius, and Crocidura suaveolens was 37.13 g, 36.29 g, 31.25 g, and 15 g, respectively. Among the trapped wild mice, vole which has the largest head and ears were Eothenomys regulus and vole which has the longest tail was Apodemus speciosus peninsulae and Apodemus agarius (p<0.5). This study might be valuable to control and predict some damages related to wild mice in Mt. Keumwon for protecting forest trees.

오대산 국립공원 노인봉 일대 삼림식생의 군락분포에 관한 연구 (Community Distribution on Mountain Forest Vegetation of the Noinbong Area in the Odaesan National Park, Korea)

  • 김창환;오장근;강은옥;최영은
    • 생태와환경
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    • 제47권2호
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    • pp.103-115
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    • 2014
  • 오대산 국립공원 노인봉(해발고도 1,338 m) 일대의 산지삼림식생은 산지낙엽활엽수림, 산지습성림, 산지침엽수림, 아고산침엽수림, 아고산활엽수림, 산지관목림, 식재림으로 세분되었으며, 평지삼림식생은 하반림, 기타식생으로 암벽식생, 농경지 등이 조사되었다. 상관대분류에 의하여 구분된 각각의 산지삼림식생을 구성하고 있는 분포군락수는 산지낙엽활엽수림은 62개 군락, 산지습성림 85개 군락, 산지침엽수림 18개 군락, 아고산침엽수림 4개 군락, 아고산활엽수림 4개 군락, 산지관목림 2개 군락, 식재림 21개 군락, 하반림 1개 군락, 기타식생 7개 군락이 조사되었다. 조사된 주요 군락의 분포 비율을 보면 산지낙엽활엽수림은 신갈나무군락이 $36,970,088.196m^2$의 48.140%로 가장 높은 분포 비율로 조사되었고, 굴참나무군락이 $3,078,054.002m^2$의 4.008%, 졸참나무군락 $2,079,416.007m^2$, 2.708%를 차지하고 있으며, 노인봉일대 산지낙엽활엽수림의 78.175%는 신갈나무가 우점 또는 차우점종으로 분포하고 있다. 산지습성림은 들메나무-층층나무군락이 전체의 15.482%를 차지하고 있으며, 들메나무와 상층부의 식피율이 비슷하여 혼생군락을 이루고 있는 군락은 8개 군락으로 전체의 17.368%를 차지하고 있다. 산지침엽수림은 소나무 군락이 전체의 78.091%로서 대부분의 산지침염수림은 소나무 1종이 상층부에서 우점종으로 나타나는 군락의 양상을 나타내고 있다. 기타식생에서 아고산침엽수림은 전나무-신갈나무군락 등 총 3개 군락이 조사되었으며 오대산 국립공원 전체 식생면적의 0.005%를 차지하고 있다. 아고산활엽수립은 사스래나무군락 등 총 4개 군락이 조사되었으며 오대산 국립공원 전체 식생면적의 0.443%를 차지하고 있다. 식재림은 일본잎갈나무가 식재림 전체의 72.222%로 가장 많이 식재되었으며, 식재림이 17.721%, 잣나무가 2.613%로 3개 수종이 전체의 92.556%로 대부분이 이들 3종에 의하여 식재되어졌다. 결론적으로 오대산 국립공원 노인봉 일대의 산림식생은 신갈나무, 소나무, 피나무, 들메나무, 층층나무, 졸참나무, 굴참나무 등 소수의 수종들이 최상층부의 우점종으로 구성되어 있으며, 이들 종들과 관련된 수많은 군락들은 식생천이 및 기후적 요인들에 의하여 군락 대체가 매우 빠르게 일어날 것으로 보인다. 따라서 이 지역 일대 잠재 자연 식생의 주요종은 산지낙엽활엽수림은 신갈나무, 산지습성림은 들메나무, 산지낙엽활엽수림과 산지습성림의 경계부 중 습도가 높은 계곡은 층층나무, 들메나무, 사면부는 피나무, 신갈나무 등에 의하여 우점될 것으로 보인다. 그러나 아고산의 침염수림은 기후온난화 등에 의하여 점차적으로 낙엽활엽수의 분포비율이 증가할 것으로 보인다.

침엽수림과 활엽수림 지역에서 박새류의 입공새집 이용 (Use of Artificial Nest Boxes of Tits in Coniferous and Deciduous Forests)

  • 임신재;손승훈;김민진;강정훈
    • 한국산림과학회지
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    • 제97권1호
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    • pp.83-87
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    • 2008
  • 본 연구는 침엽수림 지역과 활엽수림 지역에서 박새류의 인공새집 이용 특성을 파악하기 위해 각각 2006년과 2007년 3월에서 6월까지의 기간 동안 실시되었다. 두 지역에 생육하고 있는 수목의 종수, 종다양도지수, 흉고단면적은 침엽수림 지역에 비해 활엽수림 지역에서 높은 것으로 나타났다. 또한 엽층의 수직분포에 있어서도 지면에서 1m 이하의 엽층을 제외한 모든 엽층의 피도량이 활엽수림 지역에서 높은 것으로 나타났다. 2년에 걸쳐 두 지역에 설치한 인공새집에서는 곤줄박이, 쇠박새, 진박새, 박새가 번식을 한 것으로 나타났다. 침엽수림 지역보다 활엽수림 지역에서 번식쌍수가 더 높았다. 진박새의 경우, 한배산란수와 한배새끼수, 번식성공률이 침엽수림 지역에서 높은 것으로 나타났다. 또한 박새는 한배새끼수와 번식성공률이 활엽수림 지역에서 더 높았다. 서식 환경 구조 및 박새류의 종간 니치(niche)에 따라 선호하는 서식지가 다른 것으로 판단된다. 다양한 서식 환경에 설치한 인공새집이 조류 군집 및 생태에 미치는 영향을 지속적으로 파악해야 할 것이며, 이를 통해 장기적으로 인공새집을 설치 및 관리해야 할 것으로 판단된다.

Evaluation of sensitivity of soil respiration to temperature in different forest types and developmental stages of maturity using the incubation method

  • Lee, Eun-Hye;Suh, Sang-Uk;Lee, Chang-Seok;Lee, Jae-Seok
    • Journal of Ecology and Environment
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    • 제35권1호
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    • pp.1-7
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    • 2012
  • To calculate and predict soil carbon budget and cycle, it is important to understand the complex interrelationships involved in soil respiration rate (Rs). We attempted to reveal relationships between Rs and key environmental factors, such as soil temperature, using a laboratory incubation method. Soil samples were collected from mature deciduous (MD), mature coniferous (MC), immature deciduous (ID), and immature coniferous (IC) forests. Prior to measure, soils were pre-incubated for 3 days at $25^{\circ}C$ and 60% of maximum water holding capacity (WHC). Samples of gasses were collected with 0, 2, and 4 h interval after the beginning of the measurement at soil temperatures of 5, 15, 25, and $35^{\circ}C$ (at 60% WHC). Air samples were collected using a syringe attached to the cap of closed bottles that contained the soil samples. The $CO_2$ concentration of each gas sample was measured by gas chromatography. Rs was strongly correlated with soil temperature (r, 0.93 to 0.96; P < 0.001). For MD, MC, ID, and IC soils taken from 0-5 cm below the surface, exponential functions explained 90%, 82%, 92%, and 86% of the respective data plots. The temperature and Rs data for soil taken from 5-10 cm beneath the surface at MD, MC, ID, and IC sites also closely fit exponential functions, with 83%, 95%, 87%, and 89% of the data points, respectively, fitting an exponential curve. The soil organic content in mature forests was significantly higher than in soils from immature forests (P < 0.001 at 0-5 cm and P < 0.005 at 5-10 cm) and surface layer (P = 0.04 at 0-5 cm and P = 0.12). High soil organic matter content is clearly associated with high Rs, especially in the surface layer. We determined that the incubation method used in this study have the possibility for comprehending complex characteristic of Rs.

침.활엽수림에서 산림토양의 이.화학적 특성 비교 (Comparison of Soil Physical and Chemical Properties between Coniferous and Deciduous forests in Mt. Palgong)

  • 허태철;주성현
    • Current Research on Agriculture and Life Sciences
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    • 제20권
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    • pp.39-47
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    • 2002
  • This study was carried out in order to produce useful material for the forest multiple use and forest protection by soil physico-chemical analysis of studied area in Mt. Palgong. The results of soil physico-chemical analysis and statistical analysis represented as following 2 points. 1. Soil depth was in the range of average 61.1 cm and soil texture was loamy sand and sandy loam except Donghwasa area. The part of solid phase and gaseous phase were higher than other areas, but liquid phase was less in verse. Soil water content was in an average 49.5%, penetrability was average $1.95{\times}E^{-2}cm/sec$ and the average of soil hardness was $1.64Kg/cm^2$. This data showed that soil water content, penetrability and soil hardness were good at Mt. Palgong forest soils. 2. Soil pH was the range of 3.4 to 6.0, organic carbon content was 2.8% that is nearly mean of the Korea brown forest soils, total N content is somewhat smaller than that of other places, and total average C/N ratios was 13.9. Average available $P_2O_5$ concentration was 5.05 mg/kg that is lower than that of any others. The concentration of available P of coniferous forests is higher than that of deciduous forests. Exchangeable cations content is similar to those of the Korea brown forest soil and the order of the cation content extent is $Ca^{2+}$ > $Mg^{2+}$ > $Na^+$ > $K^+$.

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A Comparison of Litterfall Dynamics in Three Coniferous Plantations of Identical Age under Similar Site Conditions

  • Jeong, Jae-Yeob;Kim, Choon-Sig;An, Hyun-Chul;Cho, Hyun-Seo;Choo, Gap-Chul
    • Journal of Ecology and Environment
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    • 제32권2호
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    • pp.97-102
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    • 2009
  • This study was carried out to evaluate litterfall dynamics in three adjacent coniferous tree plantations (larch: Larix leptolepis; red pine: Pinus densiflora; rigitaeda pine: P. rigitaeda) planted in the same year (1963), and growing under similar environmental conditions in the Sambong Exhibition Forests, Hamyang-gun, Gyeongsangnam-do. Litter was collected monthly between July 2006 and June 2008. Needle, broad leaf and total litter inputs followed a similar monthly pattern in the three coniferous plantations. The amounts of needles, flowers, and miscellaneous litter were significantly lower in the larch than in the two pine plantations, while branch litter was significantly higher in the larch than in the two pine plantations. Average total litterfall for two years was significantly higher for the pine (5,475 kg $ha^{-1}\;yr^{-1}$ for red pine and 5,290 kg $ha^{-1}\;yr^{-1}$ for rigitaeda pine) plantations than for the larch (3,953 kg $ha^{-1}\;yr^{-1}$ plantation. Needle litter comprised about 73.1% of total litterfall for the rigitaeda pine, 70.8% for the red pine and 62.9% for the larch plantations. Our results demonstrate that litterfall inputs can be affected by tree species.