DOI: 10.1016/j.foreco.2016.07.002
Scopus记录号: 2-s2.0-84978957697
论文题名: Fires of differing intensities rapidly select distinct soil fungal communities in a Northwest US ponderosa pine forest ecosystem
作者: Reazin C. ; Morris S. ; Smith J.E. ; Cowan A.D. ; Jumpponen A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 377 起始页码: 118
结束页码: 127
语种: 英语
英文关键词: Fire intensity
; Forest fire
; Fungal communities
; Ponderosa pine
; Soil fungi
Scopus关键词: Deforestation
; Ecology
; Ecosystems
; Fires
; Forestry
; Soils
; Fire intensity
; Forest fires
; Fungal community
; Ponderosa pines
; Soil fungi
; Fungi
; coniferous forest
; ecosystem service
; environmental change
; fire management
; forest ecosystem
; fungus
; microbial community
; patch dynamics
; polymerase chain reaction
; soil microorganism
; soil surface
; Oregon
; Pringle Falls Experimental Forest
; United States
; Ascomycota
; Basidiomycota
; Fungi
; Morchella
; Otus
; Pyronema
英文摘要: Environmental change and long-term fire management in the western United States have created conditions that facilitate high-intensity burn areas in forested systems. Such burns may have dramatic effects on the soil microbial communities. In this study, we utilized experimental infrastructure in the Pringle Falls Experimental Forest in Oregon, where ten pairs of sites were assigned to either high burn (HB) or low burn (LB) intensity treatments to examine fungal community responses. In these treatments, understory shrubs and logging debris were masticated and broadcast burned (LB) or piled logs were fully combusted (HB) in a paired design. The burn treatments generated soil temperatures of ∼100 °C (LB) or up to 700 °C (HB) at the soil surface. We sampled soils (0–10 cm) one week before and three weeks after ignition and Illumina MiSeq-analyzed fungal Internal Transcribed Spacer 1 (ITS1) PCR-amplicons to deeply dissect the fungal communities. Our data indicate dramatic and rapid responses in community diversity and evenness in the HB treatment, with similar responses, but to a lesser degree, in the LB treatment. Nonmetric Multidimensional Scaling (NMS) ordinations and analyses of taxon frequencies reveal a substantial community turnover and corresponding replacement of the dominant basidiomycetes by ascomycetes in the HB treatment. Similar trends were visible, but weaker in the LB treatments. These coarse-level taxonomic responses were attributable to a few fire-responsive fungi, particularly Operational Taxonomic Units (OTUs) assigned to Pyronema sp. and Morchella sp., whose frequencies increased more than 100-fold following the HB treatment. Our study highlights the strong and rapid fungal fire responses and differences among fires of different intensities. As the high intensity fires – such as those represented here by the HB treatment – tend to be spatially confined and limited in scale, we emphasize their potential to generate distinct patches that may substantially contribute to beta diversity on small scales. Further, these data lead to questions about fungal community recovery (return to community state preceding the fire) and the importance of patch dynamics following a fire as well as function of post-fire communities and ecosystem services that they may provide. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64778
Appears in Collections: 影响、适应和脆弱性
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作者单位: Division of Biology, Kansas State University, Manhattan, KS, United States; U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, Corvallis, OR, United States; Dept. of Forest Ecosystems & Society, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Reazin C.,Morris S.,Smith J.E.,et al. Fires of differing intensities rapidly select distinct soil fungal communities in a Northwest US ponderosa pine forest ecosystem[J]. Forest Ecology and Management,2016-01-01,377