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THE PENNSYLVANIAN-PERMIAN VEGETATIONAL TRANSITION: A TERRESTRIAL ANALOGUE TO THE ONSHORE-OFFSHORE HYPOTHESIS.
Evolution. 1992 Jun; 46(3):807-824.E

Abstract

An analysis of 68 floras from the Pennsylvanian and Early Permian of Euramerica reveals distinct patterns of environmental distribution. Wetland assemblages are the most commonly encountered floras from the Early and Middle Pennsylvanian. Floras from drier habitats characterize the Permian. Both wetland and dry-site floras occur in the Late Pennsylvanian, but floristic overlap is minimal, which implies strong environmental controls on the distributions of the component species. Drier habitats appear to be the sites of first appearance of orders that become prominent during the Late Permian and Mesozoic. Higher taxa originated in physically heterogeneous, drier habitats, which were geographically marginal throughout most of the Pennsylvanian. They then moved into the lowlands during periods of climatic drying in the Permian, replacing older wetland vegetation. This pattern is analogous to the marine onshore-offshore pattern of origination and migration. The derivation of Mesozoic wetland clades from the Permian dry-lowland vegetation completes the parallel. The similarities of the marine and terrestrial patterns suggest that the combination of evolutionary opportunity, created by physical heterogeneity of the environment, and migrational opportunity, created by changing extrinsic conditions, may be underlying factors that transcend the specifics of organism and environment.

Authors+Show Affiliations

Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20560, USA.Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20560, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28568663

Citation

DiMichele, William A., and Richard B. Aronson. "THE PENNSYLVANIAN-PERMIAN VEGETATIONAL TRANSITION: a TERRESTRIAL ANALOGUE to the ONSHORE-OFFSHORE HYPOTHESIS." Evolution; International Journal of Organic Evolution, vol. 46, no. 3, 1992, pp. 807-824.
DiMichele WA, Aronson RB. THE PENNSYLVANIAN-PERMIAN VEGETATIONAL TRANSITION: A TERRESTRIAL ANALOGUE TO THE ONSHORE-OFFSHORE HYPOTHESIS. Evolution. 1992;46(3):807-824.
DiMichele, W. A., & Aronson, R. B. (1992). THE PENNSYLVANIAN-PERMIAN VEGETATIONAL TRANSITION: A TERRESTRIAL ANALOGUE TO THE ONSHORE-OFFSHORE HYPOTHESIS. Evolution; International Journal of Organic Evolution, 46(3), 807-824. https://doi.org/10.1111/j.1558-5646.1992.tb02086.x
DiMichele WA, Aronson RB. THE PENNSYLVANIAN-PERMIAN VEGETATIONAL TRANSITION: a TERRESTRIAL ANALOGUE to the ONSHORE-OFFSHORE HYPOTHESIS. Evolution. 1992;46(3):807-824. PubMed PMID: 28568663.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - THE PENNSYLVANIAN-PERMIAN VEGETATIONAL TRANSITION: A TERRESTRIAL ANALOGUE TO THE ONSHORE-OFFSHORE HYPOTHESIS. AU - DiMichele,William A, AU - Aronson,Richard B, PY - 1990/07/02/received PY - 1991/10/29/accepted PY - 2017/6/2/entrez PY - 1992/6/1/pubmed PY - 1992/6/1/medline KW - Macroevolution KW - Pennsylvanian KW - Permian KW - onshore-offshore hypothesis KW - paleoecology KW - upland flora SP - 807 EP - 824 JF - Evolution; international journal of organic evolution JO - Evolution VL - 46 IS - 3 N2 - An analysis of 68 floras from the Pennsylvanian and Early Permian of Euramerica reveals distinct patterns of environmental distribution. Wetland assemblages are the most commonly encountered floras from the Early and Middle Pennsylvanian. Floras from drier habitats characterize the Permian. Both wetland and dry-site floras occur in the Late Pennsylvanian, but floristic overlap is minimal, which implies strong environmental controls on the distributions of the component species. Drier habitats appear to be the sites of first appearance of orders that become prominent during the Late Permian and Mesozoic. Higher taxa originated in physically heterogeneous, drier habitats, which were geographically marginal throughout most of the Pennsylvanian. They then moved into the lowlands during periods of climatic drying in the Permian, replacing older wetland vegetation. This pattern is analogous to the marine onshore-offshore pattern of origination and migration. The derivation of Mesozoic wetland clades from the Permian dry-lowland vegetation completes the parallel. The similarities of the marine and terrestrial patterns suggest that the combination of evolutionary opportunity, created by physical heterogeneity of the environment, and migrational opportunity, created by changing extrinsic conditions, may be underlying factors that transcend the specifics of organism and environment. SN - 1558-5646 UR - https://www.unboundmedicine.com/medline/citation/28568663/THE_PENNSYLVANIAN_PERMIAN_VEGETATIONAL_TRANSITION:_A_TERRESTRIAL_ANALOGUE_TO_THE_ONSHORE_OFFSHORE_HYPOTHESIS_ DB - PRIME DP - Unbound Medicine ER -
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