DOI: 10.1016/j.palaeo.2015.06.016
论文题名: Highly productive polar forests from the Permian of Antarctica
作者: Miller M.F. ; Knepprath N.E. ; Cantrill D.J. ; Francis J.E. ; Isbell J.L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 441 起始页码: 292
结束页码: 304
语种: 英语
英文关键词: Antarctica
; Fossil forest
; High paleolatitude
; Permian
英文摘要: Two stratigraphically closely spaced bedding planes exposed at Lamping Peak in the Upper Buckley Formation, Beardmore Glacier area, Antarctica contain abundant in situ stumps (n = 53, n = 21) and other plant fossils that allow reconstruction of forest structure and biomass of Glossopteris forests that thrived at ∼75° S paleolatitude in the Permian. Mean trunk diameter is 14 and 25cm, corresponding to estimated mean maximum heights of 12 and 19m. Basal areas are 65 and 80m2ha-1. The above ground biomass was calculated using allometric equations for Ginkgo biloba, yielding biomasses of 147 and 178Mgha-1. Biomass estimates based on comparison with biomass of modern forests with equivalent basal areas are higher (225-400Mgha-1). The amount of above ground biomass added each year (annual net primary productivity), based on biomass estimates and growth rings in silicified plant material from the Buckley Formation nearby, is poorly constrained, ranging from ∼100-2000gm-2yr-1.Compared to modern forests at all latitudes, the Permian forests have high basal areas and high biomass, exceeded in both only by forests of the U.S. Pacific northwest and Sequoia forests. The estimated range of productivity (ANPP) is within that of many very productive modern forests. The Lamping Peak forests' basal areas and calculated biomass are also larger than younger high paleolatitude fossil forests except for Arctic Cenozoic forests.The presence of these highly productive fossil forests at high paleolatitude is consistent with hothouse conditions during the Late Permian, prior to the eruption of the Siberian flood basalts. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68654
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Environmental Sciences, Stevenson Center 5726, Vanderbilt University, Nashville, TN, United States; Mount Isa Mines, Locked Mailbag 100, 102 Oban Road Mount Isa, Queensland, Australia; Royal Botanic Gardens Victoria, Birdwood Avenue, Melbourne, VIC, Australia; British Antarctic Survey, High Cross, Madingley Road, Cambridge, United Kingdom; Department of Geosciences, University of Wisconsin, Milwaukee, 3209 N, Maryland Ave, Milwaukee, WI, United States
Recommended Citation:
Miller M.F.,Knepprath N.E.,Cantrill D.J.,et al. Highly productive polar forests from the Permian of Antarctica[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,441