DOI: 10.1016/j.foreco.2016.05.008
Scopus记录号: 2-s2.0-84969263361
论文题名: Shrub removal in reforested post-fire areas increases native plant species richness
作者: Bohlman G.N. ; North M. ; Safford H.D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 374 起始页码: 195
结束页码: 210
语种: 英语
英文关键词: High-severity fire
; Mixed-conifer forest
; Reforestation
; Richness
; Understory composition
Scopus关键词: Fires
; Plants (botany)
; Reforestation
; Seed
; Soil moisture
; High severity fires
; Mixed-conifer forests
; Natural regeneration
; Plant species richness
; Richness
; Sierra Nevada mixed conifers
; Stand-replacing fires
; Understory composition
; Forestry
; community composition
; coniferous forest
; fire history
; forest fire
; invasive species
; mixed forest
; native species
; plant community
; reforestation
; regeneration
; shade tolerance
; shrub
; species richness
; stand structure
; understory
; American River
; California
; Sierra Nevada [California]
; United States
; Coniferophyta
英文摘要: Large, high severity fires are becoming more prevalent in Sierra Nevada mixed-conifer forests, largely due to heavy fuel loading and forest densification caused by past and current management practices. In post-fire areas distant from seed trees, conifers are often planted to re-establish a forest and to prevent a potential type-conversion to shrub fields. Typical reforestation efforts promote conifer survival and growth by reducing competing shrub cover, yet the effects of these practices on plant species richness and composition are not well understood. We compared the effects of treatment and time since fire on (1) native and exotic plant species richness, (2) plant community composition, and (3) stand structure. Plots were installed throughout three different aged but proximate fires located in the canyon of the South Fork of the American River in California, 10, 22, and 41 years after fire. All three fires included large patches of stand-replacing fire that had been reforested with conifers as well as unplanted areas. Native plant species richness was significantly higher in planted areas where shrub cover was lower and planted trees successfully established. Native species richness decreased as time since fire increased, but the relationship between shrub control and richness persisted. Exotic species richness was higher on treated sites in the more recent fires, while the opposite was true in the oldest fire. As time since fire increased, understory species composition shifted from a community dominated by annuals and perennials to one dominated by shrubs and shade-tolerant trees. Shrub cover and July soil moisture were the top two factors influencing understory richness levels. Natural regeneration was low in the youngest fire and high in the oldest fire but highly heterogeneous in all three fires. Our study suggests that while retaining some shrub cover for post-fire habitat may be desirable, some level of shrub reduction does favor native plant richness and overall herbaceous cover. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64860
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Plant Sciences, University of California, 1 Shields Ave., Davis, CA, United States; USDA Forest Service, Pacific Southwest Research Station, 1731 Research Park Dr., Davis, CA, United States; USDA Forest Service, Pacific Southwest Region, 1323 Club Dr., Vallejo, CA, United States; Department of Environmental Science and Policy, University of California, 1 Shields Ave., Davis, CA, United States
Recommended Citation:
Bohlman G.N.,North M.,Safford H.D.. Shrub removal in reforested post-fire areas increases native plant species richness[J]. Forest Ecology and Management,2016-01-01,374