DOI: 10.1016/j.foreco.2015.09.028
Scopus记录号: 2-s2.0-84943626591
论文题名: Small-scale topographic variability influences tree species distribution and canopy throughfall partitioning in a temperate deciduous forest
作者: Siegert C.M. ; Levia D.F. ; Hudson S.A. ; Dowtin A.L. ; Zhang F. ; Mitchell M.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 359 起始页码: 109
结束页码: 117
语种: 英语
英文关键词: Catchment topography
; Deciduous forest
; Forest hydrology
; Throughfall
Scopus关键词: Catchments
; Hydrology
; Plants (botany)
; Runoff
; Topography
; Water quality
; Water resources
; Catchment topography
; Deciduous forest
; Distribution of water
; Forest hydrologies
; Temperate deciduous forest
; Throughfall
; Topographic positions
; Topographic variability
; Forestry
英文摘要: At very large spatial scales, the impacts of topography, elevation, and aspect on throughfall variability are apparent. However, within relatively small catchments (<50. ha), differences in species composition induced by slight changes in elevation coupled with slope orientation, could result in sufficient canopy variability whereby throughfall hydrology would be definitively different across small gradients. This study aims to (1) quantify the differences in throughfall hydrology across small topographic gradients, (2) determine the variability of throughfall across such gradients, and (3) determine the seasonal effects on throughfall hydrology resulting from differences in species composition and growing niches.Throughfall partitioning was measured during 15 sampling periods at 4 landscape positions including 3 hillslopes with aspects facing north (NF), west (WF), and south (SF) in addition to a flat area (F) situated in the center of a 12. ha deciduous catchment. Throughfall partitioning was significantly lower on the steepest SF plot (TF = 75.0%) than on the moderately sloping NF (TF = 83.9%, p= 0.001) and F (TF = 81.7%, p= 0.037) plots. SF also had the largest degree of throughfall variability (CV = 20.1), resulting from overlapping canopies, which led to higher rates of canopy interception. NF and WF plots exhibited the largest inter-seasonal differences with decreases in throughfall partitioning of 13.2% (p= 0.013) and 12.1% (p= 0.052), respectively, and corresponded to the largest differences in plant canopy indices (PAI) between seasons. Although slope and aspect were found to be distinguishing variables in our study, it was the influence of these variables on species composition that led to differences in throughfall quantity. Our study illustrates the systematic distribution of water resources across topographic positions within a relatively small forested catchment and highlights the need for additional consideration of topography-induced controls on microclimate and growing space, which ultimately influence water quality and quantity for effective management strategies. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65223
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forestry, Mississippi State University, Mississippi State, MS, United States; Department of Geography, University of Delaware, Newark, DE, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE, United States; Key Laboratory of Western China's Environmental Systems (MOE), Lanzhou University, Lanzhou, China; College of Environmental Science and Forestry, State University of New York, Syracuse, NY, United States
Recommended Citation:
Siegert C.M.,Levia D.F.,Hudson S.A.,et al. Small-scale topographic variability influences tree species distribution and canopy throughfall partitioning in a temperate deciduous forest[J]. Forest Ecology and Management,2016-01-01,359