DOI: 10.1016/j.foreco.2015.08.020
Scopus记录号: 2-s2.0-84939785362
论文题名: Influence of selection systems and shelterwood methods on understory plant communities of longleaf pine forests in flatwoods and uplands
作者: Brockway D.G. ; Outcalt K.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 357 起始页码: 138
结束页码: 150
语种: 英语
英文关键词: Even-aged silviculture
; Foliar cover
; Pinus palustris Mill.
; Pro-B method
; Species diversity
; Uneven-aged silviculture
Scopus关键词: Biodiversity
; Ecology
; Landforms
; Seed
; Site selection
; B method
; Even-aged silviculture
; Foliar cover
; Pinus palustris Mill
; Uneven-aged silviculture
; Forestry
; coniferous forest
; habitat selection
; plant community
; population decline
; shelter
; silviculture
; species diversity
; terrestrial ecosystem
; understory
; upland region
; vegetation cover
; Hardwoods
; Pinus Palustris
; Seedlings
; Species Identification
; Trees
; United States
; Andropogon virginicus
; Aristida beyrichiana
; Chamaecrista fasciculata
; Filicophyta
; Gaylussacia
; Ilex glabra
; Licania michauxii
; Pinus palustris
; Pityopsis graminifolia
; Quercus
; Serenoa repens
; Vaccinium
英文摘要: Although longleaf pine (Pinus palustris Mill.) forests have mostly been managed with even-aged methods, interest has been rising in uneven-aged systems, as a means of achieving a broader range of stewardship objectives. Selection silviculture has been practiced on a limited scale in longleaf pine, but difficulty of using traditional approaches and absence of an evaluation across a range of site types has left managers in doubt about its suitability. This study was conducted to quantify the effects on understory plant communities of applying single-tree selection, group selection, irregular shelterwood and uniform shelterwood in longleaf pine forests on flatwoods and uplands of the southeastern United States. Wiregrass (Aristida beyrichiana Trin. & Rupr.) and numerous other graminoids are highly desirable understory species, because they facilitate the essential ecological process of recurrent surface fire that sustains longleaf pine ecosystems. Forbs such as partridge pea (Chamaecrista fasciculata (Michx.) Greene) and low shrubs such as gopherapple (Licania michauxii Prance), blueberries (Vaccinium spp. L.) and huckleberries (Gaylussacia spp. Kunth) are also desirable as components of good wildlife habitat. Selection treatments reduced stand basal area to ~11.5m2ha-1 and shelterwood treatments left a basal area of ~5.8m2ha-1. While higher levels of logging traffic from shelterwood treatment caused a significant decline in saw-palmetto (Serenoa repens W. Bartram) cover and increases in wiregrass at the flatwoods site, on the upland site it resulted in a sharp decline in wiregrass and silverthread goldaster (Pityopsis graminifolia (Michx.) Nutt.). Absence of prescribed fire during the post-treatment years led to progressive increases for shrub cover broadly across the flatwoods. Group selection caused modest understory change in flatwoods (temporary decrease in shrubs and increase in wiregrass), but resulted in a doubling of understory plant cover on uplands, with significant increases for hardwood tree seedlings, shrubs, vines, wiregrass, forbs and ferns. Single-tree selection caused no lasting impact on saw-palmetto, a decline in gallberry (Ilex glabra (L.) A. Gray) and increase in wiregrass in flatwoods and was related on uplands to increases in oak (Quercus spp. L.), dangleberry (Gaylusaccia frondosa (L.) Torr. & A. Gray ex. Torr.), broomsedge bluestem (Andropogon virginicus L.) and several forbs. Single-tree selection produced less change in the forest than group selection, which caused less alteration than shelterwood treatment. Selection silviculture appears to be a lower risk option for guiding longleaf pine forests along a trajectory of gradual improvement, with adjustments provided by frequent surface fires and periodic tree harvest. Long-term observation is needed to verify that selection can sustain diverse plant communities on sites characterized by differing environments. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65276
Appears in Collections: 影响、适应和脆弱性
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作者单位: Southern Research Station, USDA Forest Service, 521 Devall Drive, Auburn, AL, United States; Southern Research Station, USDA Forest Service, 320 Green Street, Athens, GA, United States
Recommended Citation:
Brockway D.G.,Outcalt K.W.. Influence of selection systems and shelterwood methods on understory plant communities of longleaf pine forests in flatwoods and uplands[J]. Forest Ecology and Management,2015-01-01,357