DOI: 10.1016/j.foreco.2013.01.033
Scopus记录号: 2-s2.0-84874683459
论文题名: Variation in logging debris cover influences competitor abundance, resource availability, and early growth of planted Douglas-fir
作者: Harrington T.B. ; Slesak R.A. ; Schoenholtz S.H.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 296 起始页码: 41
结束页码: 52
语种: 英语
英文关键词: Microclimate
; Soil productivity
; Vegetation management
Scopus关键词: Douglas fir
; Early growth
; Foliar nitrogen
; Forest harvesting
; Forest regeneration
; Growing conditions
; Herb cover
; Interception loss
; Microclimate
; Pacific Northwest
; Potential effects
; Pseudotsuga menziesii
; Resource availability
; Seedling growth
; Soil depth
; Soil productivity
; Soil quality
; Soil temperature
; Soil water
; Soil water availability
; Split-plot design
; Timber harvests
; Tree seedlings
; Vegetation control
; Vegetation management
; Washington
; Water potential
; Reforestation
; Soil moisture
; Vegetation
; Debris
; abundance
; competition (ecology)
; growth rate
; herb
; microclimate
; monitoring
; mulching
; precipitation (climatology)
; regeneration
; resource availability
; seedling
; soil depth
; soil temperature
; soil water
; timber harvesting
; water availability
; Oregon
; Pacific Ocean
; Pacific Ocean (Northwest)
; United States
; Washington [United States]
英文摘要: Logging debris remaining after timber harvest can modify the microclimate and growing conditions for forest regeneration. Debris also can influence tree seedlings indirectly through its effects on development of competing vegetation, although the mechanisms are poorly understood. At two sites in Washington and Oregon (USA) that differed in availability of soil water and nutrients, mechanisms were studied by which logging debris and competing vegetation interacted to influence performance of planted Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) seedlings. In a split-plot design, two levels of competing vegetation (presence and absence) and three covers of logging debris (0%, 40%, and 80%) were replicated eight times at each site on 2. ×. 2-m areas centered on individual Douglas-fir seedlings. Vegetation abundance, seedling growth, and resource availability were monitored for 4. years (2005-2008). Soil water depletion was lower and Douglas-fir water potential and foliar nitrogen were higher in the absence of competing vegetation, resulting in increased seedling growth. The highest seedling growth rates and foliar nitrogen contents occurred where absence of vegetation was combined with 80% debris cover. Where competing vegetation was present, 40% debris cover was associated with decreases in herb cover and soil water depletion and increases in seedling growth relative to 0% or 80% debris covers. At the Washington site where soil quality was lower, the combination of presence of vegetation and 80% debris cover was associated with a 2.4. °C average reduction in summer soil temperatures at 15. cm depth, reduced foliar nitrogen content, and the slowest rates of seedling growth. Potential effects of logging debris, such as mulching (i.e., reduced evaporation of soil water) and interception loss (i.e., reduced precipitation inputs), were minor to non-detectable from sensors buried at 20-40. cm soil depth. Results of the research suggest that retention of moderate levels of logging debris (i.e., 40% cover) after forest harvesting in the Pacific Northwest is likely to increase early growth of Douglas-fir by increasing soil water availability through reduced herb abundance. Where intensive vegetation control is practiced, retention of higher debris levels (i.e., 80% cover) may provide further benefits to seedling growth. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66653
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, 3625 93rd Avenue Southwest, Olympia, WA 98512-9193, United States; Minnesota Forest Resources Council, 2003 Upper Buford Circle, St. Paul, MN 55108, United States; Virginia Water Resources Research Center, College of Natural Resources and Environment, Virginia Tech, 210 Cheatham Hall (0444), Blacksburg, VA 24061-0001, United States
Recommended Citation:
Harrington T.B.,Slesak R.A.,Schoenholtz S.H.. Variation in logging debris cover influences competitor abundance, resource availability, and early growth of planted Douglas-fir[J]. Forest Ecology and Management,2013-01-01,296