DOI: 10.1016/j.foreco.2014.12.016
Scopus记录号: 2-s2.0-84921064274
论文题名: Managing early succession for biodiversity and long-term productivity of conifer forests in southwestern Oregon
作者: Bormann B.T. ; Darbyshire R.L. ; Homann P.S. ; Morrissette B.A. ; Little S.N.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 340 起始页码: 114
结束页码: 125
语种: 英语
英文关键词: Biodiversity
; Early succession
; Early-seral
; Long-term productivity
; N2 fixation
Scopus关键词: Biodiversity
; Climate change
; Fires
; Forestry
; Hardwoods
; Plants (botany)
; Water supply
; Aboveground biomass increments
; Early succession
; Early-seral
; Natural regeneration
; Primary productivity
; Pseudotsuga menziesii
; Soil organic matters
; Stand reconstruction
; Reforestation
; aboveground biomass
; biodiversity
; coniferous forest
; deciduous tree
; harvesting
; nitrogen fixation
; plantation forestry
; productivity
; shrub
; succession
; wildfire
; Biodiversity
; Plants
; Productivity
; Pseudotsuga Menziesii
; Softwoods
; Oregon
; United States
; Coniferophyta
; Pinus attenuata
; Pseudotsuga
; Pseudotsuga menziesii
英文摘要: Early-successional stages have been truncated and altered in many western U.S. forest landscapes by planting conifers, controlling competing vegetation, suppressing fire, and focusing on maintaining late-seral species and undisturbed riparian zones. Declining area of early-successional stages may be reducing resilience and sustainability on landscapes that experience elevated disturbance related to future climate changes. In this study, two post-harvest early-successional treatments were compared to each other and to two mature-forest treatments using 20years of evidence from replicated 7-ha experimental units in a southwestern Oregon forest dominated by Douglas-fir (Pseudotsuga menziesii Mirb. Franco). One early- successional treatment (Douglas-fir plantation) planted Douglas-fir and was followed by a brushing to reduce hardwood competition to move quickly to the conifer stem-exclusion stage the other (Early-seral plantation) favored natural sprouting and regeneration of hardwood shrubs and trees and planted scattered knobcone pines (Pinus attenuata Lemmon) and Douglas-fir. Plant diversity in the Early-seral plantation was 56% (year 2) and 26% (year 6) higher than in the Douglas-fir plantation. Both early-successional treatments far exceeded plant diversity in Unaltered and Thinned mature stands. Fifteen years of growth of shrubs and hardwood trees in the Early-seral plantation was remarkable, resulting in total aboveground biomass increment (18Mgha-1yr-1) double that of the Douglas-fir plantations. Important process effects related to primary productivity were noted: losses of soil organic matter from the B horizon in young Douglas-fir, and, after wildfire, increases in N2-fixing plant cover in Early-seral plantation. The burl-sprouting and deep rooting of many hardwoods also created opportunities for nutrient retention and release from primary minerals as well as deep-profile water supply. Recognizing the importance of intentionally managing for shrubs and hardwood trees is particularly relevant at this site, because stand reconstruction and historical records indicate these species, along with knobcone pine, dominated the site for 40years before the current mature Douglas-fir forest started gaining dominance. In contrast, the prolific natural regeneration of Douglas-fir after recent harvest and wildfire suggests that what comes back "naturally" in modern times will not allow this history to be repeated. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65546
Appears in Collections: 影响、适应和脆弱性
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作者单位: USDA Forest Service, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR, United States; USDA Forest Service, Pacific Northwest Regional Office, 1220 SW 3rd Ave, Portland, OR, United States; Dept. of Environmental Sciences, Huxley College of the Environment, Western Washington Univ., Bellingham, WA, United States; Dept. of Forest Ecosystems and Society, Oregon State Univ., Corvallis, OR, United States; USDA Forest Service, Pacific Northwest Research Station, Portland, OR, United States; Retired, Portland, OR, United States
Recommended Citation:
Bormann B.T.,Darbyshire R.L.,Homann P.S.,et al. Managing early succession for biodiversity and long-term productivity of conifer forests in southwestern Oregon[J]. Forest Ecology and Management,2015-01-01,340