• Title/Summary/Keyword: 종의 상관

Search Result 2,102, Processing Time 0.03 seconds

Forest Community Structure of Yunhachon Valley Chirisan national Park (지리산국립공원 연하천계곡 산림군집구조)

  • 송광섭
    • Korean Journal of Environment and Ecology
    • /
    • v.13 no.4
    • /
    • pp.382-391
    • /
    • 2000
  • 지리산국립공원 연하천계곡의 식물군집구조를 조사하기 위해서 48개의 조사구(1개 조사구 단위면적 100m2)를 설정하고 식생조사를 하였다 48개의 조사구는 DCA 분석에 의하여 2개의 군집(들메나무군집 시날나무군집)으로 분류되었다 층위별상대우점치와 흉고직경급별 분포 분석결과 들메나무와 신갈나무는 현상태를 계속유지할 것으로 보이며 들메나무군집은 계곡부 토지극상림을 이루고 있었다 연하천계곡의 Shannon 종다양도지수는 들메나무군집은 1.0810 신갈나무군집은 0.2468이었다 들메나무는 함박꽃나무 물참대 참회나무 바위 마발도리 개회나무와 정의 상관관계를 보였으며 신갈나무 생강나무, 조릿대, 노린재 , 당단풍과 부의상관관계를 보였다.

  • PDF

Design of a Security Monitoring System based on correlation analysis (침해위협 상관분석 기반의 보안관제시스템 설계)

  • Jeong, Ki-Moon;Park, Hark-Soo
    • Proceedings of the Korean Society of Computer Information Conference
    • /
    • 2011.06a
    • /
    • pp.335-338
    • /
    • 2011
  • 최근 정보화가 고도화됨에 따라 해킹, 웜 바이러스 등 사이버 침해사고 또한 증가하고 있다. 이에 따라 사이버 침해사고를 예방하고 대응하기 위하여 보안관제의 필요성이 대두되고 있으며 이를 지원하기 위한 시스템이 등장하고 있다. 단순한 사이버 공격을 탐지하는 수준에서 벗어나 분석 및 대응 등 넓은 의미의 보안관제 활동을 수행하기 위한 시스템은 이기종 환경에서 대용량의 데이터를 처리하여 신속하고 정확한 탐지 결과를 보여줄 수 있어야 한다. 또한 다양한 보안관제 활동을 원활히 수행할 수 있는 기능을 제공하여야 한다. 본 논문에서는 이러한 요구사항을 반영하여 대용량 보안이벤트 데이터를 동적으로 상관 분석하여 탐지 효율성과 신속성을 향상시킬 수 있는 보안관제시스템을 설계 제안한다.

  • PDF

Long-Term Variation of the Fish Community in the Upper Region of the Gapyeong Stream, Korea (가평천 상류역 어류군집의 장기변동)

  • Yoon, Seok-Jin;Choi, Jun-Kil;Lee, Hwang-Goo
    • Korean Journal of Environment and Ecology
    • /
    • v.28 no.4
    • /
    • pp.432-441
    • /
    • 2014
  • April, 2005 to October, 2013. The collected species during the survey period were 17 species belonging to 6 families. Dominant species was Zacco koreanus(Relative abundance 59.9%) and subdominant species Pungtungia herzi(8.5%). Korea endemic species were 12, including Coreoleuciscus splendidus. The species of Hemibarbus mylodon was identified as natural monument, and Pseudopungtungia tenuicorpa and Gobiobotia brevibarba were endangered species. Water quality assessment of Gapyeong Stream, had lately maintained the rating of "very good" for nine years, based on the Ministry of the Environment standards notice. It was found that there was a tendency for populations which is Coreoperca herzi carnivorous species decreases, increases omnivorous species Zacco platypus. As a result of community analysis, dominant index was 0.58~0.86, diversity index was 0.94~1.77 and richness index was 0.99~2.39. As a result of using the Rarefaction curve, were analyzed occurrence species expected each year, number of species is estimated from a sample of 151 individuals, up to 12(2005) was at least 5(2007) species. The regression coefficient (b) in relation to length-weight on Z. koreanus population were annual average $3.29{\pm}1.11$, condition factor slope $0.0034{\pm}0.0021$, which maintained good growth condition and stabilized population.

Occurrence of Weed Species on Turf Sod Production Areas in Jangsung-gun, Jeonnam Province (전남 장성지역 한국잔디 재배지 잡초발생 현황)

  • Choi, Sung Hwan;Ahn, Soo Jeong;Lee, Dong Woon
    • Weed & Turfgrass Science
    • /
    • v.5 no.4
    • /
    • pp.247-255
    • /
    • 2016
  • This study was conducted to provide basic information for weed control by surveying the occurrence of weed species in turf sod production areas. Surveys of weed species occurred in turf sod production areas were conducted in Jangsung-gun, Jeonnam province from September 2014 to May 2016. Total 50 sites of turf sod production areas in two soil conditions were investigated. On the upland soil condition in turf sod production areas, 66 weed species in 27 families were identified and classified to 49 annuals and 17 perennials and on the paddy soil condition, 69 weed species in 22 families were identified and classified to 53 annuals and 16 perennials. Based on the importance values, the most dominant weed species on the upland soil condition in the first survey (September 2014) was Digitaria ciliaris (8.49%), followed by Erigeron annuus (7.94%) and Rorippa indica (6.56%). In the second survey (May 2016) was Oxalis corniculata (7.26%), followed by Capsella bursa-pastoris (6.21%) and Conyza canadensis (6.21%). Whereas the most dominant weed species on the paddy soil condition in the first survey (September 2014) was Erigeron annuus (9.52%), followed by Mazus pumilus (7.41%) and Cyperus iria (6.82%). In the second survey (May 2016) was Commelina communis (5.08%), followed by Alopecurus aequalis (5.08%) and Erigeron annuus (4.79%). This information could be useful for estimation of future weed occurrence and effective weed control methods in turf sod production areas in Jangsung-gun, Jeonnam Province.