干旱区生态环境知识资源中心(Arid): Uplands, lowlands, and climate: Taphonomic megabiases and the apparent rise of a xeromorphic, drought-tolerant flora during the Pennsylvanian-Permian transition

Arid

DOI	10.1016/j.palaeo.2020.109965
	Uplands, lowlands, and climate: Taphonomic megabiases and the apparent rise of a xeromorphic, drought-tolerant flora during the Pennsylvanian-Permian transition
	DiMichele, William A.; Bashforth, Arden R.; Falcon-Lang, Howard J.; Lucas, Spencer G.
通讯作者	DiMichele, WA
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2020
卷号	559
英文摘要	The Late Mississippian and Pennsylvanian have been referred to as the Coal Age due to enormous paleotropical peat accumulations (coal beds). Numerous fossil floras have been collected from these coals, and their associated seat-earth paleosols and roof-shales, over more than two centuries, leading to the inference of vast swampy wetlands covering the Pangean tropics during the Pennsylvanian. In contrast, the Permian tropics are characterized as more arid, with sparser and more heterogeneous vegetation than inferred for the Pennsylvanian. In the tropics, the Pennsylvanian to Permian transition has been described as a changeover from a pteridophytedominated Paleophytic flora, to a seed-plant dominated Mesophytic flora. This view notwithstanding, floras dominated by xeromorphic seed plants also are well known from the Pennsylvanian tropics. Some authors have characterized these plants as being occupants of uplands, subsequently transported into basinal-lowland, preservational environments. In this model, uplands are well drained, causing areas of drought under otherwise everwet climates. In this paper, we present an alternative interpretation: that the apparent transition in Pennsylvanian-Permian tropical vegetation reflects two types of taphonomic megabias. First is a preservational megabias, strongly favoring the vegetation of humid climates over that of seasonally dry climates. Accordingly, tropical-plant preservational potential fluctuated in concert with Late Paleozoic Ice Age glacial-interglacial oscillations, and contemporaneous sea-level and climatic changes. Second is an analytical megabias, strongly favoring the discovery and collection of the wetland biome from Pennsylvanian strata, overlooking the less frequently and more poorly preserved drought-tolerant biome. By Permian times, vast wetlands, and their fossil record, had largely disappeared from central Pangea (although continuing in Cathaysia), making drought-tolerant vegetation more visible to searchers, without changing its preservational circumstances. We demonstrate that the upland model is untenable, being inconsistent with the principles of plant biogeography and with geological aspects of the fossil record.
英文关键词	Wetland Dryland Paleophytic Mesophytic Late Paleozoic
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000591242700009
WOS关键词	CENTRAL APPALACHIAN BASIN ; TROPICAL RAIN-FOREST ; UPPER SILESIAN BASIN ; DESMOINESIAN-MISSOURIAN BOUNDARY ; PHYLOGENETIC NICHE CONSERVATISM ; WESTERN EQUATORIAL PANGEA ; INTRA-SUDETIC BASIN ; PALEOZOIC ICE-AGE ; LOWER CUTLER BEDS ; CONEMAUGH GROUP
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327579
作者单位	[DiMichele, William A.] Smithsonian Inst, Dept Paleobiol, Natl Museum Nat Hist, Washington, DC 20560 USA; [Bashforth, Arden R.] Univ Copenhagen, Nat Hist Museum Denmark, Oster Voldgade 57, DK-1350 Copenhagen K, Denmark; [Falcon-Lang, Howard J.] Royal Holloway Univ London, Dept Earth Sci, Egham TW20 0EX, Surrey, England; [Lucas, Spencer G.] New Mexico Museum Nat Hist & Sci, Albuquerque, NM 87104 USA
推荐引用方式 GB/T 7714	DiMichele, William A.,Bashforth, Arden R.,Falcon-Lang, Howard J.,et al. Uplands, lowlands, and climate: Taphonomic megabiases and the apparent rise of a xeromorphic, drought-tolerant flora during the Pennsylvanian-Permian transition[J]. University of London,2020,559.
APA	DiMichele, William A.,Bashforth, Arden R.,Falcon-Lang, Howard J.,&Lucas, Spencer G..(2020).Uplands, lowlands, and climate: Taphonomic megabiases and the apparent rise of a xeromorphic, drought-tolerant flora during the Pennsylvanian-Permian transition.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,559.
MLA	DiMichele, William A.,et al."Uplands, lowlands, and climate: Taphonomic megabiases and the apparent rise of a xeromorphic, drought-tolerant flora during the Pennsylvanian-Permian transition".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 559(2020).