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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2014.6
- 수록면
- 247 - 247 (1page)
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초록· 키워드
In northern boreal ecosystems fire is one of the most important disturbance factors and it is expected that the frequency and severity of these fires will increase due to global climate change. Fungi and bacteria are important drivers of soil organic matter decomposition, as they produce extracellular enzymes required to degrade litter inputs of the plants, animals and microbes. There is increasing interest in the role of boreal forests in the global carbon cycle and in feedbacks between climate change, forest fires and the carbon cycle. A more complex understanding of the way in which fire affects soil microbes and fungal communities is necessary to predict ecosystem carbon dynamics under future global change. If fire affects decomposition processes, through changes in enzymatic activity and changes in fungal and microbial community, this could be significant at the ecosystem scale and would result in changes in carbon and nutrient cycling. We measured changes in litter enzymatic activities, soil microbial and fungal biomasses and soil carbon dynamics following fire disturbance in Scots pine (Pinus sylvestris L.) stands in the northern boreal forests, of eastern Lapland, Värriö Strict Nature Reserve, Finland (67°46' N, 29°35' E). The sites are situated north of the Arctic Circle, near to the northern timberline at an average of 300 m altitude. We have established 8 sample areas (with two replicate plots in each) in a chronosequence of 4 age classes (2 to 152 years since the last fire). The chronosequence consisted of four types of areas: (i) fire 2 years ago, (ii) fire 42 years ago, (ii ... 전체 초록 보기
#Boreal forests
#forest fire
#enzyme activity
#microbial biomass
#soil respiration
#ergosterol content
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