DOI: 10.1007/s10533-016-0213-9
Scopus记录号: 2-s2.0-84983050149
论文题名: Trees: a powerful geomorphic agent governing the landscape evolution of a subtropical wetland
作者: Sullivan P.L. ; Price R.M. ; Ross M.S. ; Stoffella S.L. ; Sah J.P. ; Scinto L.J. ; Cline E. ; Dreschel T.W. ; Sklar F.H.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 128, 期: 3 起始页码: 369
结束页码: 384
语种: 英语
英文关键词: Everglades
; Plant-groundwater–surface water interactions
; Soil formation
; Tree islands
; Weathering
Scopus关键词: aboveground biomass
; accretion
; biomass allocation
; constructed wetland
; evapotranspiration
; feedback mechanism
; geomorphology
; groundwater-surface water interaction
; ionic composition
; landscape evolution
; marsh
; nutrient availability
; pedogenesis
; subtropical region
; transpiration
; tree
; weathering
; Everglades
; Florida [United States]
; United States
英文摘要: Transpiration-driven ion accumulation in soil has been invoked as a biological and physical feedback mechanism in wetlands that governs topographic differences by regulating soil accretion—with greater transpiration, ion accumulation and soil accretion occurring on tree islands as compared to the surrounding marsh. The strength of this mechanism is hypothesized to be controlled by the ratio of evapotranspiration (ET) to precipitation (P), where under greater ET to P conditions soil accretion may move from organic to mineral in nature. We tested the existence of this mechanism on tree islands in a subtropical wetland, determined if it supports mineral soil formation, and assessed its control on the development of nutrient resource contrasts (tree islands–marsh). To test our hypotheses, biannual measurements of groundwater, surface water and aboveground biomass were made from 2007 to 2012. Water samples were analyzed for water isotopes, concentrations of major ions, and total and dissolved nutrients on constructed tree islands. We found that tree transpiration led to the advective movement of water and associated ions toward the center of the tree islands, supporting CaCO3 precipitation. CaCO3 accretion on the tree islands was estimated at roughly 1 mm per decade, and represented 5 % of the total soil accretion since the islands’ planting. We also observed depletion in groundwater nutrient concentrations as tree biomass accumulated, indicative of tight nutrient cycling. This work provides direct evidence that trees can act as powerful geomorphic agents in wetland systems, forming mineral soils that support landscape heterogeneity on time scales of centuries to millennia. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83391
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Geography and Atmospheric Science, University of Kansas, Lawrence, KS, United States; Department of Earth and Environment, Florida International University, Miami, FL, United States; Southeast Environmental Research Center, Florida International University, Miami, FL, United States; Everglades Systems Assessment Section, South Florida Water Management District, West Palm Beach, FL, United States
Recommended Citation:
Sullivan P.L.,Price R.M.,Ross M.S.,et al. Trees: a powerful geomorphic agent governing the landscape evolution of a subtropical wetland[J]. Biogeochemistry,2016-01-01,128(3)