DOI: 10.1016/j.quascirev.2015.10.032
Scopus记录号: 2-s2.0-84947445007
论文题名: Recent and Holocene climate change controls on vegetation and carbon accumulation in Alaskan coastal muskegs
作者: Peteet D.M. ; Nichols J.E. ; Moy C.M. ; McGeachy A. ; Perez M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 131 起始页码: 168
结束页码: 178
语种: 英语
英文关键词: Alaska
; Alnus
; Carbon
; Macrofossils
; Pollen
; Vegetation
Scopus关键词: Carbon
; Digital storage
; Peat
; Vegetation
; Wetlands
; Alaska
; Alnus
; Andromeda polifolia
; Carbon accumulation
; Holocene climate change
; Macrofossils
; Pollen
; Temperature increase
; Climate change
; carbon sequestration
; climate variation
; coastal zone
; depositional environment
; geoaccumulation
; global warming
; gyttja
; Holocene
; moss
; peatland
; population decline
; shrub
; temperature effect
; vegetation structure
; Alaska
; Cordova Harbor
; United States
; Alnus
; Alnus crispa
; Andromeda polifolia
; Cyperaceae
; Nuphar polysepalum
; Potamogeton
; Rhododendron
; Sphagnum
英文摘要: Pollen, spore, macrofossil and carbon data from a peatland near Cordova, Alaska, reveal insights into the climate-vegetation-carbon interactions from the initiation of the Holocene, c. the last 11.5 ka, to the present (1 ka = 1000 calibrated years before present where 0 = 1950 CE). The Holocene period is characterized by early deposition of gyttja in a pond environment with aquatics such as Nuphar polysepalum and Potamogeton, and a significant regional presence of Alnus crispa subsp. sinuata. Carbon accumulation (50 g/m2/a) was high for a short interval in the early Holocene when Sphagnum peat accumulated, but was followed by a major decline to 13 g/m2/a from 7 to 3.7 ka when Cyperaceae and ericads such as Rhododendron (formerly Ledum) groenlandicum expanded. This shift to sedge growth is representative of many peatlands throughout the south-central region of Alaska, and indicates a drier, more evaporative environment with a large decline in carbon storage. The subsequent return to Sphagnum peat after 4 ka in the Neoglacial represents a widespread shift to moister, cooler conditions, which favored a resurgence of ericads, such as Andromeda polifolia, and increased carbon accumulation rate. The sustained Alnus expansion visible in the top 10 cm of the peat profile is correlative with glacial retreat and warming of the region in the last century, and suggests this colonization will continue as temperature increases and ice melts. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59738
Appears in Collections: 过去全球变化的重建
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作者单位: NASA Goddard Institute for Space Studies, New York, NY, United States; Lamont-Doherty Earth Observatory, Palisades, NY, United States; Geology Dept., University of Otago, PO Box 56, Dunedin, New Zealand; Spelman College, Atlanta, GA, United States; Binghamton University, Binghamton, NY, United States; Northwestern University, Chicago, IL, United States
Recommended Citation:
Peteet D.M.,Nichols J.E.,Moy C.M.,et al. Recent and Holocene climate change controls on vegetation and carbon accumulation in Alaskan coastal muskegs[J]. Quaternary Science Reviews,2016-01-01,131