DOI: 10.1111/gcb.14393
Scopus记录号: 2-s2.0-85052398601
论文题名: Altered fire regimes cause long-term lichen diversity losses
作者: Miller J.E.D. ; Root H.T. ; Safford H.D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 10 起始页码: 4909
结束页码: 4918
语种: 英语
英文关键词: climate change
; cryptic degradation
; deforestation
; disturbance
; dry forests
; epiphytes
; interval squeeze
; regime shifts
Scopus关键词: Coniferophyta
; Fungi
英文摘要: Many global ecosystems have undergone shifts in fire regimes in recent decades, such as changes in fire size, frequency, and/or severity. Recent research shows that increases in fire size, frequency, and severity can lead to long-persisting deforestation, but the consequences of shifting fire regimes for biodiversity of other vegetative organisms (such as understory plants, fungi, and lichens) remain poorly understood. Understanding lichen responses to wildfire is particularly important because lichens play crucial roles in nutrient cycling and supporting wildlife in many ecosystems. Lichen responses to fire have been little studied, and most previous research has been limited to small geographic areas (e.g. studies of a single fire), making it difficult to establish generalizable patterns. To investigate long-term effects of fire severity on lichen communities, we sampled epiphytic lichen communities in 104 study plots across California's greater Sierra Nevada region in areas that burned in five wildfires, ranging from 4 to 16 years prior to sampling. The conifer forest ecosystems we studied have undergone a notable increase in fire severity in recent decades, and we sample across the full gradient of fire severity to infer how shifting fire regimes may influence landscape-level biodiversity. We find that low-severity fire has little to no effect on lichen communities. Areas that burned at moderate and high severities, however, have significantly and progressively lower lichen richness and abundance. Importantly, we observe very little postfire lichen recolonization on burned substrates even more than 15 years after fire. Our multivariate model suggests that the hotter, drier microclimates that occur after fire removes forest canopies may prevent lichen reestablishment, meaning that lichens are not likely to recolonize until mature trees regenerate. These findings suggest that altered fire regimes may cause broad and long-persisting landscape-scale biodiversity losses that could ultimately impact multiple trophic levels. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110201
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Environmental Science and Policy, University of California, Davis, Davis, CA, United States; Botany Department, Weber State University, Ogden, UT, United States; USDA Forest Service, Pacific Southwest Region, Vallejo, CA, United States
Recommended Citation:
Miller J.E.D.,Root H.T.,Safford H.D.. Altered fire regimes cause long-term lichen diversity losses[J]. Global Change Biology,2018-01-01,24(10)