Effect of Forest Fire on the Microbial Community Activity of Forest Soil according to the Difference between Geology and Soil Depth

Ji Seul Kim; Jun Ho Kim; Hyeong Chul Jeong; Eun Young Lee

doi:10.9720/kseg.2023.1.015

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2023 Vol.33, Issue 1 Preview Page Next Page

Research Article

Effect of Forest Fire on the Microbial Community Activity of Forest Soil according to the Difference between Geology and Soil Depth 산불이 지질과 토심의 차이에 따른 산림토양 미생물 군집 활성도에 미치는 영향에 대한 연구

31 March 2023. pp. 15-25

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Abstract

The effects of forest fires on the activity of microbial communities in topsoil and subsoil were investigated. Samples were collected from Korean forest soils comprising mainly igneous and sedimentary rocks. Analysis of beta-glucosidase, found higher microbial activity in sedimentary rocks than in igneous rocks. Enzyme activity was not observed immediately after fire, but was restored over time. The enzyme activity of subsoil was inhibited by 33~46% compared with that in the topsoil, regardless of soil damage. The effect of fire on the availability of microbial substrate was investigated using EcoPlate. The percentages of average well color development values of damaged and normal topsoil were 52.7~56.8% and 62.3~83.6%, respectively. Forest fires appear to affect the diversity and substrate availability of the subsoil microbial community by accelerating the decomposition of soil organic matter. The Shanon index, representing microbial biodiversity, was high in the topsoil of all samples; it was higher for soil microorganisms in sedimentary rocks than in igneous rocks, and higher in topsoil than in subsoil.

Keywords

topsoil

subsoil

forest fire

soil microbial community activity

normal soil

damaged soil

화성암과 퇴적암으로 이루어진 국내 산림토양 중 표토와 심토에서 채취된 시료의 미생물군집 활성도에 미치는 산불의 영향을 알아보았다. 베타글루코시다아제의 분석결과, 화성암보다 퇴적암의 미생물군집에서 높게 나타났다. 산불 발생 초기에 효소 활성이 관찰되지 않았으나, 시간이 경과됨에 따라 활성이 회복되었다. 또한, 토양의 훼손여부와 상관없이 심토는 표토에 비해 활성이 33~46% 저해되었다. EcoPlate를 이용하여 산불이 미생물 기질이용성에 미친 영향을 알아보았다. 정상토와 훼손토의 평균반응구발색도 값 백분율은 표토에서 각각 52.7~56.8% 및 62.3~83.6%로 나타났다. 산불 발생은 토양 유기물의 분해를 촉진함으로 심토미생물군집의 다양성 및 기질이용성에 영향을 준 것으로 보여진다. 미생물군집의 종다양성지수인 샤논 인덱스(Shanon index, H)는 모든 시료의 표토에서 높게 나타났다. 샤논 풍부도는 퇴적암 토양미생물이 화성암에 비하여 높게 나타났으며, 표토가 심토보다 높게 나타났다.

키워드

표토

심토

산불

토양미생물군집 활성도

정상토

훼손토

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Information

Publisher :Korean Society of Engineering Geology
Publisher(Ko) :대한지질공학회
Journal Title :The Journal of Engineering Geology
Journal Title(Ko) :지질공학
Volume : 33
No :1
Pages :15-25
Received Date : 2023-11-23
Revised Date : 2023-12-14
Accepted Date : 2023-12-19
DOI :https://doi.org/10.9720/kseg.2023.1.015

The Journal of Engineering Geology ISSN:1226-5268(Print) 2287-7169(Online) 지질공학

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