DOI: 10.1016/j.foreco.2014.05.052
Scopus记录号: 2-s2.0-84903775153
论文题名: Initial soil respiration response to biomass harvesting and green-tree retention in aspen-dominated forests of the great lakes region
作者: Kurth V.J. ; Bradford J.B. ; Slesak R.A. ; D'Amato A.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 328 起始页码: 342
结束页码: 352
语种: 英语
英文关键词: Forest aggregate
; Populus tremuloides
; Slash retention
; Stem-only harvest
; Whole-tree harvest
Scopus关键词: Aggregates
; Biomass
; Ecology
; Reforestation
; Soils
; Biomass harvesting
; Forest management practices
; Great Lakes regions
; Green-tree retention
; Management practices
; Populus tremuloides
; Slash retention
; Whole-tree harvest
; Harvesting
; biomass
; carbon cycle
; deciduous tree
; dominance
; ecosystem response
; forest management
; growing season
; harvesting
; legislative implementation
; management practice
; soil respiration
; soil temperature
; stand structure
; Great Lakes [North America]
; Minnesota
; United States
英文摘要: Contemporary forest management practices are increasingly designed to optimize novel objectives, such as maximizing biomass feedstocks and/or maintaining ecological legacies, but many uncertainties exist regarding how these practices influence forest carbon (C) cycling. We examined the responses of soil respiration (Rs) to biomass harvesting and green-tree retention in an effort to empirically assess their impacts on C cycling. We measured Rs and soil microclimatic variables over four growing seasons following implementation of these management practices using a fully replicated, operational-scale experiment in aspen-dominated forests in northern Minnesota. Treatments included three levels of biomass removal within harvested areas: whole-tree harvest (no slash deliberately retained), 20% slash retained, and stem-only harvest (all slash retained), and two levels of green-tree retention: 0.1ha aggregate or none. The relative amount of biomass removed had a negligible effect on Rs in harvested areas, but treatment effects were probably obscured by heterogeneous slash configurations and rapid post-harvest regeneration of aspen in all of the treatments. Discrete measurements of Rs and soil temperature within green-tree aggregates were not discernible from surrounding harvested areas or unharvested control stands until the fourth year following harvest, when Rs was higher in unharvested controls than in aggregates and harvested stands. Growing season estimates of Rs showed that unharvested control stands had higher Rs than both harvested stands and aggregates in the first and third years following harvest. Our results suggest that retention of larger forest aggregates may be necessary to maintain ecosystem-level responses similar to those in unharvested stands. Moreover, they highlight the innate complexity of operational-scale research and suggest that the initial impacts of biomass harvest on Rs may be indiscernible from traditional harvest in systems where incidental breakage is high. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65859
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Resources, University of Minnesota, 1530 Cleveland Ave. N., St. Paul, MN 55108, United States; US Geological Survey, Southwest Biological Science Center, Flagstaff, AZ 86001, United States; Minnesota Forest Resources Council, 1530 Cleveland Ave. N., St. Paul, MN 55108, United States
Recommended Citation:
Kurth V.J.,Bradford J.B.,Slesak R.A.,et al. Initial soil respiration response to biomass harvesting and green-tree retention in aspen-dominated forests of the great lakes region[J]. Forest Ecology and Management,2014-01-01,328