The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest
The current reconstruction of the vegetation of eastern North America at the last glacial maximum postulates a very wide zone of tundra and boreal forest south of the ice. This reconstruction requires that the deciduous forest retreated far to the south. The authors believe that this reconstruction...
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Argonne National Laboratory
1998
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ftunivnotexas:info:ark/67531/metadc694578 2023-05-15T18:40:14+02:00 The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest Loehle, C. Iltis, H. United States. Department of Energy. Office of Energy Research. 1998-12-31 53 p. Text https://doi.org/10.2172/564104 http://digital.library.unt.edu/ark:/67531/metadc694578/ English eng Argonne National Laboratory other: DE97008109 rep-no: ANL/ER/PP--90468 grantno: W-31109-ENG-38 doi:10.2172/564104 osti: 564104 http://digital.library.unt.edu/ark:/67531/metadc694578/ ark: ark:/67531/metadc694578 Other Information: PBD: [1998] Population Dynamics Forests Terrestrial Ecosystems Environmental Impacts Climatic Change North America Pleistocene Epoch 54 Environmental Sciences Numerical Data Report 1998 ftunivnotexas https://doi.org/10.2172/564104 2015-12-19T23:12:10Z The current reconstruction of the vegetation of eastern North America at the last glacial maximum postulates a very wide zone of tundra and boreal forest south of the ice. This reconstruction requires that the deciduous forest retreated far to the south. The authors believe that this reconstruction is seriously in error. Geologic evidence for glacial activity or tundra is absent from the southern Appalachians. Positive evidence for boreal forest is based on pollen identifications for Picea, Betula, and Pinus, when in reality southern members of these genera have pollen that cannot be distinguished from that of northern members. Further, pollen of typical southern species such as oaks and hickories occurs throughout profiles that past authors had labeled boreal. Pollen evidence for a far southern deciduous forest refuge is lacking. Data on endemics are particularly challenging for the scenario in which deciduous forest migrated to the south and back. The southern Appalachian region is rife with endemics that are often extreme-habitat specialists unable to migrate. The previously glaciated zone is almost completely lacking in endemics. Outlier populations, range boundaries, and absence of certain hybrids all argue against a large boreal zone. The new reconstruction postulates a cold zone no more than 75--100 miles wide south of the ice in the East. Report Tundra University of North Texas: UNT Digital Library |
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Open Polar |
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University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Population Dynamics Forests Terrestrial Ecosystems Environmental Impacts Climatic Change North America Pleistocene Epoch 54 Environmental Sciences Numerical Data |
spellingShingle |
Population Dynamics Forests Terrestrial Ecosystems Environmental Impacts Climatic Change North America Pleistocene Epoch 54 Environmental Sciences Numerical Data Loehle, C. Iltis, H. The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest |
topic_facet |
Population Dynamics Forests Terrestrial Ecosystems Environmental Impacts Climatic Change North America Pleistocene Epoch 54 Environmental Sciences Numerical Data |
description |
The current reconstruction of the vegetation of eastern North America at the last glacial maximum postulates a very wide zone of tundra and boreal forest south of the ice. This reconstruction requires that the deciduous forest retreated far to the south. The authors believe that this reconstruction is seriously in error. Geologic evidence for glacial activity or tundra is absent from the southern Appalachians. Positive evidence for boreal forest is based on pollen identifications for Picea, Betula, and Pinus, when in reality southern members of these genera have pollen that cannot be distinguished from that of northern members. Further, pollen of typical southern species such as oaks and hickories occurs throughout profiles that past authors had labeled boreal. Pollen evidence for a far southern deciduous forest refuge is lacking. Data on endemics are particularly challenging for the scenario in which deciduous forest migrated to the south and back. The southern Appalachian region is rife with endemics that are often extreme-habitat specialists unable to migrate. The previously glaciated zone is almost completely lacking in endemics. Outlier populations, range boundaries, and absence of certain hybrids all argue against a large boreal zone. The new reconstruction postulates a cold zone no more than 75--100 miles wide south of the ice in the East. |
author2 |
United States. Department of Energy. Office of Energy Research. |
format |
Report |
author |
Loehle, C. Iltis, H. |
author_facet |
Loehle, C. Iltis, H. |
author_sort |
Loehle, C. |
title |
The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest |
title_short |
The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest |
title_full |
The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest |
title_fullStr |
The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest |
title_full_unstemmed |
The Pleistocene biogeography of eastern North America: A nonmigration scenario for deciduous forest |
title_sort |
pleistocene biogeography of eastern north america: a nonmigration scenario for deciduous forest |
publisher |
Argonne National Laboratory |
publishDate |
1998 |
url |
https://doi.org/10.2172/564104 http://digital.library.unt.edu/ark:/67531/metadc694578/ |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Other Information: PBD: [1998] |
op_relation |
other: DE97008109 rep-no: ANL/ER/PP--90468 grantno: W-31109-ENG-38 doi:10.2172/564104 osti: 564104 http://digital.library.unt.edu/ark:/67531/metadc694578/ ark: ark:/67531/metadc694578 |
op_doi |
https://doi.org/10.2172/564104 |
_version_ |
1766229508253286400 |