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        검색결과 446

        201.
        2011.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        광주광역시에 분포하는 보호수는 9분류군 68개체다. 환경백서에 기록된 보호수 가운데 광산구 운남동 신가마을의 떡갈나무는 갈참나무로, 서구 벽진동 벽진마을의 양버들은 왕버들로, 남구 석정동의 소나무는 반송으로 수정되어야 한다. IPCC는 21세기말에 평균기온은 최고 6.4℃ 및 해수면은 59 cm 상승하므로 북극빙하는 완전히 녹아 없어지고 지구상의 생물종 95%가 멸종위기에 빠질 것으로 경고하고 있다. 광주광역시의 보호수를 통해 기후변화
        4,000원
        202.
        2011.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 기후변화에 따른 한반도 난온대 상록활엽수의 생육지 변화를 예측하기 위하여 CT-model을 이용하여 현재기후(1961~1990)와 3종류의 미래기후(2081~2100) 시나리오에서의 잠재 생육지를 예측하였다. 반응변수로서 난온대 상록활엽수의 실제 분포에서 추출한 유/무자료와 4가지 기후변수(온량지수, 최한월최저기온, 동경강수량, 하계강수량)를 예측변수로 사용하였다. 현재기후에서 잠재 생육지(PH)는 28,230km2로 예측되었으며, 3종류 미래기후 시나리오(CCCMA-A2, CSIRO-A2, HADCM3-A2)에서는 77,140~89,285km2로 예측되었다. 현재기후에서 토지 이용을 고려한 잠재 생육지(PHLU)는 8,274km2로 예측되었으며, 잠재 생육지의 29.3%를 차지하였다. 미래기후에서 토지 이용을 고려한 잠재 생육지는 35,177~45,170km2로 예측되었으며, 26.9~36.9% 증가하였다. 기후변화에 따른 난온대 상록활엽수의 분포 확대는 토지 이용에 제한되어 생육지 파편 형태로 진행되고 있다. 난온대 상록활엽수의 생육지 증가는 난온대 낙엽활엽수림과의 경쟁이 예상되며, 난온대 상록활엽수림대의 확대 및 북상을 시사하고 있다.
        4,200원
        203.
        2011.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        4,600원
        204.
        2011.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Climate change is an emerging environmental issue. To prevent possible trade sanctions from the industrialized trading partners, Taiwan proposed several policies to mitigate greenhouse gas emissions. This includes their preparation of the Greenhouse Gas Reduction Act is under legislature review and the Statute for Renewable Energy Management. Because Taiwan is not a member of the United Nations, it is excluded from participation in the United Nation Convention on Climate Change and lacks access to the flexible mechanisms defined under the Kyoto Protocol. The Taiwan Environment Protection Administration plans to encourage the local emitters to acquire foreign reduction credits to offset domestic emissions. This article approaches Taiwan’s mitigation policies and measures from an international legal perspective. It also introduces adaptation policies and recommends that the government establish a special national adaptation team to prepare data and criteria for risk prioritization. Finally, this paper recommends that the Parties of the UNFCCC adopt the ‘universal apply’principle for climate change and allow any governmental agency whose governing matters are covered by the convention, to participate and share emission-reduction responsibilities.
        5,100원
        205.
        2011.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This paper examines the early operation of the Kyoto Protocol’s non-compliance procedure since 2006. Several important non-compliance cases recently or currently before the Kyoto Compliance Committee of the procedures and mechanisms deserve to be analysed and discussed. As we may see, the enforcement branch of the Compliance Committee has dealt with some important cases of non-compliance; Among them, from the viewpoint of interpretation or application of international environmental treaties, the question of compliance by Croatia would be particularly interesting. What must be noticed is that the Kyoto Protocol’s NCP has prepared a multilateral forum which enables both the parties and the enforcement branch to base their arguments on international legal perspectives. This examination will also contribute to contested theories of compliance with international legal rules.
        5,700원
        207.
        2011.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 기후변화에 따른 한반도 난온대 상록활엽수의 분포변화와 CT분석을 이용하여 난온대 상록활엽수의 분포를 규정하는 기후요인과 분포적지를 밝히는 것을 목적으로 실시하였다. CT분석을 통해 구축된 한반도 난온대 상록활엽수 분포 모델(EG-model)에서 TMC(최한월최저기온)가 분포를 규정하는 주요 요인으로 작용하였으며, TMC(최한월최저기온)의 -5.95℃이상을 난온대 상록활엽수의 분포적지로 하고 있다. 이러한 TMC값을 CMT(최한월평균기온)으로 환산한 값인 -1.7℃는 동아시아 지역 상록활엽수림의 내성한계 온도인 최한월평균기온 -1℃다 약간 낮은 것으로 분석되었다. 한반도의 난온대 상록활엽수는 최한월최저기온(TMC) -5.95℃이상의 따듯한 지역에서는 하계강수량 (PRS)이 826.5mm이상인 지역에서, 최한월최저기온(TMC) -5.95℃미만의 추운 지역에서는 하계강수량이 1219mm이상인 기후조건에서 높은 분포확률을 나타내었다. 이러한 분포경향은 일본의 난온대 상록활엽수의 분포경향과 비슷하였다. 또한, 난온대 상록활엽수는 한반도의 기온상승에 따라 고위도 및 남부내륙으로 분포를 확대하고 있으며 난온대 상록활엽수의 북방한계선 변화를 시사하고 있다.
        4,000원
        208.
        2010.10 구독 인증기관·개인회원 무료
        The diapause duration P. ussuriensis eggs is known to either one year or prolonged to additional years. This complex life cycle is mainly caused by the interruption at two embryonic stages: early stage (initial diapause) and fully developed late stage (final diapause). The environmental cues, such as temperature, is critical to determine the diapause duration but the precise diapause mechanism of P. ussuriensis eggs is unclear. We demonstrated temperature effects on the entrance of initial diapause. Newly oviposited eggs were incubated at two temperature conditions (20℃and 30℃) for 60 days. When eggs were incubated at 20℃, egg weights were not significantly changed, but at 30℃ those were gradually increased to 1.5 times for 50 days. Genomic DNA contents of eggs were similarly increased at 30℃. Total RNA contents at 30℃ were highly increased from the 15-days-old but not at 20℃. In addition, we further analysed expression levels of two heat shock protein 70 (hsp70a, hap70b) genes during embryonic development. Our results suggest that initial diapause occurred between 10 and 15 days after oviposition and its entrance was blocked by high temperature incubation.
        210.
        2009.10 구독 인증기관·개인회원 무료
        Climate change and global warming are directly effecting the population dynamics of insects of medical importance and insect pests of agricultural commodities during the last few years. The outbreak of some insect-borndiseases and decreasing yield of agricultural products are both caused and results of climate change are known everywhere in the world. Recent reports of honey bee diseases and out breaks, as well as increase in the incidence of CCD(Collapse Colonial Disease) are causing great concerns and pose big problem for our bee keepers in many countries in North America and Europe. These important infectious diseases are possible carried and propagated by bee mites primarily by Varroa mites, which have recently experienced increasing populations in USA and UK includes some European countries. Recently some Asian honey bees adapted to live in the urban areas as the example of Apis dorsata move to Mae Fah Luang Campus more than 30 colonies and even in Chulalonkorn Campus more than 10 colonies increase from few colonies in the the last few years. Apis florea have been found more than 161 colonies this year in Kanchanaburi (River Kwai province) this year(2009). The discussion of some wild honey bees migration will concentrate on research program of our bee research unit of the university in Thailand.
        211.
        2009.10 구독 인증기관·개인회원 무료
        Deciduous tree fruits such as pears and apples are widely grown in the Pacific Northwest of the United States and are well adapted to the seasonal environment in that region. Extended cold periods provide adequate chilling to break dormancy and reinitiate growth in the spring. Cold exposure synchronizes the physiological processes and makes sure that bloom is uniform and that fruit matures in a uniform manner. As a result of global warming, some fruit-growing areas may experience inadequate cold exposure during the winter months, gradually shifting the southern boundary for production of deciduous fruits further north. However, climate change will affect not only growth and fruiting habits of fruit trees but also the insect and mite pests which feed on them. There is general agreement that in temperate regions a trend towards warmer summers and milder winters will generally benefit insect and mite pests and increase their injuriousness. Temperature changes in particular will impact the development, mortality, phenology, and voltinism of fruit pests. Here we discuss how climate change may affect pests and control practices on deciduous tree fruits in the Hood River Valley of northern Oregon. This small valley extends in a north-south direction from the Columbia River to the foothills of Mt. Hood and is characterized by a varied topography and large altitudinal differences (sea level to 600 m). The major pest of pears and apples in that area is codling moth, Cydia pomonella L., a cosmopolitan pest which is present in most deciduous fruit-growing areas of the world. Like its host trees, the codling moth is well adapted to a seasonal environment. Diapause is the principal mechanism which synchronizes its phenology with the tree and the presence of fruit, the larval food source. Diapausing overwintering larvae require cold exposure (chilling) to terminate diapause in late winter or early spring. At the lower elevations close to the Columbia River the codling moth is bivoltine but gradually becomes univoltine at the higher elevations where the growing season is shorter and fewer heat units (above 10oC) are available for development. Long-term temperature records from the lower Hood River Valley indicate that the 25 years since 1985 have been considerable warmer than the 25 years prior to 1985. For instance, the average heat units available for codling moth development over a season have increased by more than 10% over the last 25 years. The codling moth is adapting to this warming trend by gradually increasing its voltinism (number of generations). As a result, the severity of codling moth as a pest can be expected to increase. Therefore, fruit growers will have to adjust and intensify control practices to keep fruit free from codling moth damage. We will also explore how other fruit and foliage feeding pests which are part of the pest complex of pears and apples in northern Oregon fare under different global warming scenarios compared to codling moth.
        212.
        2009.10 구독 인증기관 무료, 개인회원 유료
        Vector-borne diseases are transmitted to humans by blood-feeding arthropods such as mosquitoes, ticks, and fleas. These cold-blooded animals are influenced by environmental change. A recent report by IPCC showed that the emission of greenhouse gases has already changed world climates. Heat waves in Europe, rises in global mean sea level, summer droughts and wild fires, more intense precipitation, and increasing numbers of large cyclones, hurricanes and typhoon may be typical example of extreme climate phenomena related to global warming. High temperatures during winter season may increase survival rate among arthropod vectors in Temperate Zone. Warming may accelerate the spread of mosquitoes such as Aedes albopictus in the northern parts of Japan and European countries. The spread of the mosquito vector through global used-tire trading in recent decades to Africa, the Mideast, Europe, and North and South America caused an outbreak of Chikungunya fever in north Italy in 2007.
        3,000원
        213.
        2009.10 구독 인증기관 무료, 개인회원 유료
        Forest pests are one of the major disturbance factors in forest ecosystem and their outbreaks are expected to be severer under influence of climate changes. Among the forest pests, coleopterans can be key stone species because they are one of the dominant groups in forest and their ecological functions are very diverse. Moreover, saproxylic beetles contributed to ecological succession of forests thus, ecological functions of forests are changed in response to their outbreaks. The outbreaks of mountain pine beetle (MPB) were the most dramatic examples that outbreaks by climate change induce changes in ecological function of forest. Compositions of coleopteran species were variable to latitudinal changes whereas compositions of functional group were consistent. This showed that ecological function of coleopteran had resilience to climate changes and directions of changes in coleopteran communities were predictable based on species-specific latitudinal distribution. In addition, abundance of saproxylic beetles increased with increase in DBH (diameter at breast height), suggesting tree ages are one of the key factors for saproxylic beetles. Finally, potential changes in interactions between saproxylic beetles and trees under climate changes were discussed.
        3,000원
        214.
        2009.10 구독 인증기관 무료, 개인회원 유료
        Insect occurrence is closed related to crop and environment. Global climate changes as environment factor influencing not only crops but also insects on their behavior, distribution, development, survival and reproduction. Insect life stage are most often calculated using accumulated degree days from base temperature and biofix point. Temperature is also main factor to changes in moisture humidity and CO2 that effect on crop and insect development. Precipitation is another climate change on consideration factor to insect survival. Therefore, the precise impacts of climate change on insects is somewhat uncertain because it may change favor some insects while others may inhibit their development. On predicting the impact of climate change on insect is very complex exercise and need closed cooperation with experts on modeling. Some generalized predictions can be made, based on current pest distributions and severity of insect outbreaks in individual regions. At the present in Thailand, some alien insect species often present by global trades as by climate change.
        3,000원
        216.
        2009.10 구독 인증기관 무료, 개인회원 유료
        Global warming is one of the most buzzing words these days, as the average temperature increased up to 6.4℃ before the end of 21st century and the water level to 59cm causing severe draught, heavy snowfall, and monster typhoon all over the world. The capacity of natural ecosystem will not be able to contain such changes. Many of the species will be endangered and some of them are warned to be extinct, and accordingly water and food supply will not meet the demand of human. In 2007, IPCC, Inter Governmental Panel on Climate Change, made fourth report about global warming and estimated that the CO2 content in the atmosphere increased about 1.35 times to 379ppm at 2005 from 280ppm before the industrialization period pulling the average air temperature up by 0.7℃ a year. The water level as well increased by 1.8mm a year as the polar iceberg and permanent snow melt down. Global warming caused by environmental pollution and greenhouse gas may lead to the increase of price of not only agricultural product but also the industrial products as a consequence, a phenomenon so called Ecoflation, Ecology+inflation. IPCC forecasted that if the present phase use of fossil energy continues the air temperature in 2090-2099 will increase by 4℃ and the water level by 26-59cm compared to that of 1980-1999, warning particularly that the average increase of global temperature by 1.5-2.5℃ a year will put the species of 20-30% into danger of extinction. According to the report by the Korea National Statistical Office about the effect of climate change on the production of agriculture and fishery, the cultivation area of apple which is typical temperate fruit decreased to 29,204ha in 2007 from 52,447ha in 1992. On the other hand the cultivation area of peach increased greatly to 15,014ha(2005) compared to 12,000ha in 1996 as it became possible to grow wherever in Korea. Similar change can also be found for orange and grape, orange can be grown in Jeonnam and Kyuongnam province, and grape in Kangwon province. Jeju island and southern coastal area of Korea worry about the inhabitation of subtropical pests when they invade these area, in fact the pest outbreak as a result of the increase of generation a year is ever more frequent. The typical examples are Paratlanticus ussuriensis (Uvarov), the lantern fly, Lycorma delicatula, and the fruit moths like Carposina sasakii Walsingham.
        3,000원
        220.
        2009.10 구독 인증기관·개인회원 무료
        Global warming has serious implications for all aspects of human life, including elevated sea levels, crop failure and famine, changes in global rainfall patterns, changes to plant and animal populations, and serious health effects. Especially Infectious diseases are global entities that depend dynamically on the interaction between the population and the existing regional climate. The global warming requires a basic understanding of the greenhouse effect. In nature, the greenhouse effect is responsible for elevating the Earth’s temperature, making it possible for life to thrive. Greenhouse gases include carbon dioxide, methane, nitrous oxide, hydrocarbons, per fluorocarbons and sulfur hexafluoride. Population size and global warming are related because human activities increase production of greenhouse gases. This effect culminates in global warming and ecosystem. Severe weather events may result in injuries and fatalities, and heat waves can cause direct effects such as dehydration heat asthenia, hear exhaustion, heat stroke, and respiratory disease. Earth system changes increasing climate variability, increased rainfall in some areas and drought in others, and more frequent severe weather events, have considerable potential to affect human health. Impact of Climate change on Public Health is difficult to quantify the exact risk. Particularly, about infectious diseases, the impact depends on the complex interaction between the human host population and the causative infectious agent. Important human factors include crowding, food scarcity, poverty, and local environmental decline. Some health effects of climate change may result from indirect impacts on natural ecosystems Ecosystem changes can increase the rage, seasonality, and infectivity of some vector borne disease. For example, altered climatic conditions can change the habitats of vectors such as mosquitoes or rats and affect the parasites they carry. Changing the abundance and geographic range of carriers and parasites could shift the seasonal occurrence of many infectious diseases and cause them to spread. Heavy rain falls and related factors are associated with water borne disease outbreaks, and these may increase the risk of food borne illness. Higher levels of carbon dioxide and heat may promote production of allergens by such plants as ragweed, and warmer weather may promote the formation of groundlevel ozone. Humidity combined with heat facilitates fungal growth and transmission The World Health Organization estimated, in its "World Health Report 2002", that climate change was estimated to be responsible in 2000 for approximately 2.4% of worldwide diarrhoea, and 6% of malaria in some middle-income countries . However, small changes, against a noisy background of ongoing changes in other causal factors, are hard to identify. Clearly, global warming will cause changes in the epidemiology of infectious diseases. The ability of mankind to react or adapt is dependent upon the magnitude and speed of the change. The outcome will also depend on our ability to recognize epidemics early, to contain them effectively, to provide appropriate treatment, and to commit resources to prevention and research This article will introduce the concepts of global warming, focus on the impact of climate changes on human health and infectious disease, and present future strategy in KCDC