Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14641 |
Wildfire severity reduces richness and alters composition of soil fungal communities in boreal forests of western Canada | |
Day, Nicola J.1; Dunfield, Kari E.2; Johnstone, Jill F.3,4; Mack, Michelle C.5; Turetsky, Merritt R.2; Walker, Xanthe J.5; White, Alison L.1,6; Baltzer, Jennifer L.1 | |
2019-07-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:7页码:2310-2324 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | Wildfire is the dominant disturbance in boreal forests and fire activity is increasing in these regions. Soil fungal communities are important for plant growth and nutrient cycling postfire but there is little understanding of how fires impact fungal communities across landscapes, fire severity gradients, and stand types in boreal forests. Understanding relationships between fungal community composition, particularly mycorrhizas, and understory plant composition is therefore important in predicting how future fire regimes may affect vegetation. We used an extreme wildfire event in boreal forests of Canada's Northwest Territories to test drivers of fungal communities and assess relationships with plant communities. We sampled soils from 39 plots 1 year after fire and 8 unburned plots. High-throughput sequencing (MiSeq, ITS) revealed 2,034 fungal operational taxonomic units. We found soil pH and fire severity (proportion soil organic layer combusted), and interactions between these drivers were important for fungal community structure (composition, richness, diversity, functional groups). Where fire severity was low, samples with low pH had higher total fungal, mycorrhizal, and saprotroph richness compared to where severity was high. Increased fire severity caused declines in richness of total fungi, mycorrhizas, and saprotrophs, and declines in diversity of total fungi and mycorrhizas. The importance of stand age (a surrogate for fire return interval) for fungal composition suggests we could detect long-term successional patterns even after fire. Mycorrhizal and plant community composition, richness, and diversity were weakly but significantly correlated. These weak relationships and the distribution of fungi across plots suggest that the underlying driver of fungal community structure is pH, which is modified by fire severity. This study shows the importance of edaphic factors in determining fungal community structure at large scales, but suggests these patterns are mediated by interactions between fire and forest stand composition. |
英文关键词 | disturbance functional groups global change mycorrhizas saprotrophs Taiga Plains understory |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477087100011 |
WOS关键词 | JACK PINE STANDS ; NITROGEN AVAILABILITY ; ECTOMYCORRHIZAL FUNGI ; MICROBIAL COMMUNITIES ; LITTER DECOMPOSITION ; INTERIOR ALASKA ; CLIMATE-CHANGE ; FIRE SEVERITY ; RESILIENCE ; WOOD |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184616 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Wilfrid Laurier Univ, Waterloo, ON, Canada; 2.Univ Guelph, Guelph, ON, Canada; 3.Univ Saskatchewan, Saskatoon, SK, Canada; 4.Univ Alaska Fairbanks, Fairbanks, AK USA; 5.No Arizona Univ, Flagstaff, AZ 86011 USA; 6.Ontario Minist Nat Resources & Forestry, Peterborough, ON, Canada |
推荐引用方式 GB/T 7714 | Day, Nicola J.,Dunfield, Kari E.,Johnstone, Jill F.,et al. Wildfire severity reduces richness and alters composition of soil fungal communities in boreal forests of western Canada[J]. GLOBAL CHANGE BIOLOGY,2019,25(7):2310-2324. |
APA | Day, Nicola J..,Dunfield, Kari E..,Johnstone, Jill F..,Mack, Michelle C..,Turetsky, Merritt R..,...&Baltzer, Jennifer L..(2019).Wildfire severity reduces richness and alters composition of soil fungal communities in boreal forests of western Canada.GLOBAL CHANGE BIOLOGY,25(7),2310-2324. |
MLA | Day, Nicola J.,et al."Wildfire severity reduces richness and alters composition of soil fungal communities in boreal forests of western Canada".GLOBAL CHANGE BIOLOGY 25.7(2019):2310-2324. |
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