DOI: 10.1016/j.foreco.2016.06.001
Scopus记录号: 2-s2.0-84973911440
论文题名: Evaluating forest subcanopy response to moderate severity disturbance and contribution to ecosystem-level productivity and resilience
作者: Fahey R.T. ; Stuart-Haëntjens E.J. ; Gough C.M. ; De La Cruz A. ; Stockton E. ; Vogel C.S. ; Curtis P.S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 376 起始页码: 135
结束页码: 147
语种: 英语
英文关键词: Acer rubrum
; Ecological silviculture
; Great Lakes region
; Intermediate disturbance
; Northern hardwood
; Quercus rubra
Scopus关键词: Carbon
; Ecology
; Ecosystems
; Hardwoods
; Acer rubrum
; Ecological silviculture
; Great Lakes regions
; Intermediate disturbance
; Northern hardwoods
; Quercus rubra
; Forestry
; aboveground biomass
; carbon sink
; community composition
; deciduous tree
; ecosystem resilience
; environmental disturbance
; forest canopy
; forest ecosystem
; growth response
; heterogeneity
; mortality
; net primary production
; recovery plan
; silviculture
; Great Lakes [North America]
; Acer rubrum
; Quercus rubra
英文摘要: North American temperate forests have functioned as a terrestrial carbon (C) sink for more than a century, but the future of this sink is highly uncertain as disturbance frequency increases and regrown forests approach maturity. The subcanopy is integral to the functional recovery of forests, supporting short-term resilience of primary production and longer-term shifts in tree species composition and diversity. However, the factors that contribute to variation in forest subcanopy response to disturbance are not well understood. In this study, we investigated subcanopy shifts in aboveground wood net primary productivity (ANPPw) and composition following experimental moderate severity disturbance emulating natural canopy mortality from age-related senescence. We assessed the importance of variation in disturbance severity, site fertility, and community composition on subcanopy disturbance response and contribution to total (canopy and subcanopy) ANPPw response. We also assessed the effect of the moderate severity disturbance on species composition and diversity, and competitive patterns within the subcanopy layer. Subcanopy aboveground biomass and ANPPw increased substantially relative to pre-disturbance levels by a factor of 1.4 and 22.7, respectively. The subcanopy (stems <8 cm DBH) made up a large component of overall (canopy plus subcanopy) post disturbance ANPPw (16.2%) and disturbance response (post-disturbance ANPPw/pre-disturbance ANPPw; 54.1%). Subcanopy ANPPw, subcanopy post-disturbance ANPPw response, and subcanopy contribution to total post-disturbance ANPPw response were all most strongly predicted by subcanopy community composition in combination with canopy composition and site fertility. Variation in disturbance severity was not a strong predictor of subcanopy ANPPw response to disturbance. Subcanopy compositional trends and growth patterns both indicate likely increased heterogeneity in canopy composition (greater β diversity) and a potential shift toward greater dominance by mid-tolerant Quercus rubra (northern red oak). Our results illustrate the importance of the subcanopy in the response of forest productivity to moderate severity disturbance and illustrate that composition of the subcanopy layer exerts a strong influence on the growth response both of the subcanopy and the forest as a whole. Our findings highlight the unique role of moderate severity disturbance, relative to more severe disturbances, in promoting biological and structural heterogeneity in forest ecosystems and favoring underrepresented mid-tolerant species. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64824
Appears in Collections: 影响、适应和脆弱性
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作者单位: University of Connecticut, Dept. of Natural Resources and the Environment, Center for Environmental Sciences and Engineering, United States; Virginia Commonwealth University, Department of Biology, United States; University of Michigan Biological Station, United States; Ohio State University, Department of Evolution, Ecology and Organismal Biology, United States
Recommended Citation:
Fahey R.T.,Stuart-Haëntjens E.J.,Gough C.M.,et al. Evaluating forest subcanopy response to moderate severity disturbance and contribution to ecosystem-level productivity and resilience[J]. Forest Ecology and Management,2016-01-01,376