DOI: 10.1016/j.foreco.2017.02.042
Scopus记录号: 2-s2.0-85014172475
论文题名: Changes in soil microbial response across year following a wildfire in tropical dry forest
作者: Singh A.K. ; Kushwaha M. ; Rai A. ; Singh N.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 391 起始页码: 458
结束页码: 468
语种: 英语
英文关键词: Fire
; Microbial properties
; Physicochemical properties
; Seasonal variation
; Soil enzymes
Scopus关键词: Ecology
; Ecosystems
; Enzymes
; Forestry
; Organic carbon
; Phosphatases
; Soils
; Tropics
; Ecological disturbance
; Microbial biomass carbon
; Microbial properties
; Microbial respiration
; Nitrogen and phosphorus
; Physicochemical property
; Seasonal variation
; Soil enzymes
; Fires
英文摘要: Wildfire is a recurrent ecological disturbance in the tropical dry forest (TDF) due to high fuel load and lengthy dry season. TDF covers a large area of the tropics, but relatively few studies have documented how wildfires influence soil microbial properties. Here, we have explored its influence on microbial biomass carbon (Cmic), microbial respiration (CmicR), and on representatives of hydrolytic (acid and alkaline phosphatase, β-glucosidase and dehydrogenase) and oxidative enzymes (phenol oxidase; Phenox and peroxidase; Perox). Two wildfires affected TDF (India) sites (multi- and mono-specific) were examined. Soil sampling was carried out across a year after one, three, eight and thirteen months of fire. The result of our study indicates that the wildfire resulted in significant increase in Cmic, CmicR, hydrolytic enzymes (except acid phosphatase) and decreased (Phenox) or had no effect (Perox) on oxidative enzymes. The levels of changes in these microbial properties were higher after one month of fire compared to levels after thirteen months of fire and was linked to shift in soils available nutrients (nitrogen and phosphorus). Moreover, the extents of changes in these microbial properties were higher at denser and higher litter mass site (multi-specific forest). Wildfires have not altered the seasonality of these microbial properties, with Cmic, CmicR, hydrolytic enzymes were higher during the summer month (June) and lower during the rainy (August) in the both burned and control plots. However, oxidative enzymes were greater during the rainy season when soil substrate (organic carbon) was at the minimum level. Additionally, two peaks in Perox activity was detected at the mono-specific site. These findings indicate that the role of oxidative enzymes in TDF is very critical for the ecosystems functioning. We concluded that the wildfire resulted in a significant effect on soil microbial properties, and that these changes may exist for short-period, though it may lead to some critical changes in ecosystem functioning. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64406
Appears in Collections: 影响、适应和脆弱性
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作者单位: Academy of Scientific and Innovative Research (AcSIR), CSIR-National Botanical Research Institute (CSIR-NBRI) Campus, Rana Pratap Marg, Lucknow, India; Plant Ecology and Environmental Science Division, National Botanical Research Institute, Lucknow, India
Recommended Citation:
Singh A.K.,Kushwaha M.,Rai A.,et al. Changes in soil microbial response across year following a wildfire in tropical dry forest[J]. Forest Ecology and Management,2017-01-01,391