DOI: 10.1016/j.foreco.2014.01.018
Scopus记录号: 2-s2.0-84902163696
论文题名: Shifts in functional traits among tree communities across succession in eastern deciduous forests
作者: Wilfahrt P.A. ; Collins B. ; White P.S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 324 起始页码: 179
结束页码: 185
语种: 英语
英文关键词: Disturbance
; Forest succession
; Functional traits
Scopus关键词: Hardwoods
; Nitrogen
; Vegetation
; Complex topographies
; Disturbance
; Forest inventory and analysis
; Forest succession
; Functional diversity
; Functional traits
; Soil nitrogen content
; Unimodal distribution
; Reforestation
; community composition
; coniferous forest
; deciduous forest
; disturbance
; ecoregion
; forest dynamics
; forest ecosystem
; forest inventory
; functional role
; plant community
; succession
; Hardwoods
; Nitrogen
; Plants
; Reforestation
; Betula papyrifera
; Coniferophyta
; Populus tremuloides
英文摘要: Throughout the eastern deciduous forest (EDF) region, disturbances, including fire, wind storms, and landslides, interweave with complex topography and vegetation history to produce a mosaic of forest types and ages. Forest composition and dynamics following disturbance can depend on the interaction of plant traits related to resource capture, regeneration, and growth with changes in the post-disturbance environment. Appropriate traits should vary predictably with the stand age of a forest community as this acts as a proxy for time since last disturbance. We used Forest Inventory and Analysis data to investigate the hypothesis that community level means of seed mass and wood density increase, and leaf nitrogen decreases, with age of eastern deciduous forests, reflecting a shift from light-seeded, fast-growing early successional vegetation to heavier-seeded, slower-growing vegetation. As hypothesized, seed mass and wood density were positively correlated with stand a≥ however, the relationship differed among ecoregions of the EDF. Northern forests in the Warm Continental Division showed lower seed mass and wood density values in young stands, with a stronger increase in these values as succession advanced relative to more southerly ecoregions. This could reflect slower succession, preponderance of light-seeded and low wood density early post-disturbance deciduous trees such as Populus tremuloides and Betula papyrifera, or presence of conifers in early successional stands. Leaf nitrogen showed no consistent relationship with stand age, suggesting no consistent relationship of photosynthetic rate or soil nitrogen content with tree composition over succession throughout the EDF. Instead, leaf nitrogen differed among the ecoregion divisions and showed a unimodal distribution with latitude, peaking near the middle latitudes of the Hot Continental and Prairie Divisions. Collectively, the results indicate functional trait shifts over succession throughout the EDF, in agreement with a shift from ruderal to more competitive or stress-tolerant strategies, but also point to differences in the strength and shape of that shift among ecoregions. Early post-disturbance forest harbors a unique combination of functional traits. Further, disturbance that creates a mosaic of forest stand ages is important for maximizing not just species diversity, but functional diversity as well. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65940
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Curriculum for the Environment and Ecology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3275, United States; Department of Biology, Western Carolina University, Cullowhee, NC 28723, United States; Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, United States
Recommended Citation:
Wilfahrt P.A.,Collins B.,White P.S.. Shifts in functional traits among tree communities across succession in eastern deciduous forests[J]. Forest Ecology and Management,2014-01-01,324