DOI: 10.1016/j.foreco.2016.07.026
Scopus记录号: 2-s2.0-84994519373
论文题名: Partitioning soil respiration across four age classes of loblolly pine (Pinus taeda L.) on the Virginia Piedmont
作者: McElligott K.M. ; Seiler J.R. ; Strahm B.D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 378 起始页码: 173
结束页码: 180
语种: 英语
英文关键词: Carbon fluxes
; Heterotrophic respiration
; Loblolly pine plantations
; Soil respiration
Scopus关键词: Budget control
; Ecosystems
; Soils
; Carbon fluxes
; Heterotrophic respiration
; Interactive effect
; Loblolly pine (pinus taeda l.)
; Loblolly pine plantations
; Repeated measures
; Silvicultural management
; Soil respiration
; Forestry
; age class
; carbon flux
; coniferous tree
; ecosystem function
; estimation method
; forest ecosystem
; niche partitioning
; plantation forestry
; seasonality
; silviculture
; soil respiration
; stand structure
; United States
; Virginia
; Pinus taeda
英文摘要: Quantification of the heterotrophic component of total soil respiration is important for estimating forest carbon pools and fluxes, and for understanding carbon dynamics associated with stand development and silvicultural management. We measured the proportion of heterotrophic respiration (RH) to total soil respiration (RS) in extensively managed loblolly pine (Pinus taeda L.) stands of four age classes in the Piedmont physiographic province of Virginia. Our objectives were to evaluate the influence of stand age and seasonality on the proportion of RH to RS (RH:RS). RH was partitioned using root exclusion cores, and both RS and RH were measured 90 days following installation of cores for five seasons. Repeated measures analysis revealed that stand age and measurement season each had a significant effect on RH:RS (P < 0.001), but that there were no interactive effects (P = 0.202). Mean RH:RS during the 12-month study declined with stand age, and were 0.82, 0.73, 0.59, and 0.50 for 3-year-old, 9-year-old, 18- year-old, and 25-year-old stands, respectively. Across all age classes, the winter season had the highest mean RH:RS of 0.85 while summer had the lowest of 0.55. This study provides estimates of RH:RS in managed loblolly pine systems, and demonstrates the need to consider the impact of stand age and seasonal patterns when estimating net annual carbon (C) budgets of forest ecosystems and to identify the point at which plantations switch from functioning as C sources to a C sinks. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64766
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Resources & Environmental Conservation, 228 Cheatham Hall (0324), Virginia Tech, Blacksburg, VA, United States
Recommended Citation:
McElligott K.M.,Seiler J.R.,Strahm B.D.. Partitioning soil respiration across four age classes of loblolly pine (Pinus taeda L.) on the Virginia Piedmont[J]. Forest Ecology and Management,2016-01-01,378