A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance
A flood debris assemblage of fossil Coleoptera is described from a 10 600 year old terrace deposit in southern Ontario. It is a small sample of the fauna that had colonized the region after deglaciation and although the species are extant, the assemblage is a surprising mixture of faunistic elements...
Published in: | Canadian Journal of Earth Sciences |
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Canadian Science Publishing
1977
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Online Access: | http://dx.doi.org/10.1139/e77-138 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-138 |
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crcansciencepubl:10.1139/e77-138 2023-12-17T10:26:03+01:00 A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance Ashworth, Allan C. 1977 http://dx.doi.org/10.1139/e77-138 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-138 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 14, issue 7, page 1625-1634 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1977 crcansciencepubl https://doi.org/10.1139/e77-138 2023-11-19T13:39:23Z A flood debris assemblage of fossil Coleoptera is described from a 10 600 year old terrace deposit in southern Ontario. It is a small sample of the fauna that had colonized the region after deglaciation and although the species are extant, the assemblage is a surprising mixture of faunistic elements for which there is no known modern analog. Species with wide-spread boreal, arctic-alpine, northwestern boreal, southern boreal, and eastern distributions are recorded. The present ecologic and geographic distributions of the species indicate a valley environment with similar habitat diversity and climate to those which characterize the tundra–forest transition zone of northern Canada. This interpretation is supported by macroscopic plant evidence but conflicts with pollen evidence which implies a climate with warmer summers. To resolve the problem it is proposed that the valley fauna and flora survived in an isolated cold microenvironment surrounded by regionally warmer conditions and for which analogies presently exist on the north and east shores of Lake Superior. Article in Journal/Newspaper Arctic Tundra Canadian Science Publishing (via Crossref) Arctic Canada Canadian Journal of Earth Sciences 14 7 1625 1634 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Ashworth, Allan C. A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance |
topic_facet |
General Earth and Planetary Sciences |
description |
A flood debris assemblage of fossil Coleoptera is described from a 10 600 year old terrace deposit in southern Ontario. It is a small sample of the fauna that had colonized the region after deglaciation and although the species are extant, the assemblage is a surprising mixture of faunistic elements for which there is no known modern analog. Species with wide-spread boreal, arctic-alpine, northwestern boreal, southern boreal, and eastern distributions are recorded. The present ecologic and geographic distributions of the species indicate a valley environment with similar habitat diversity and climate to those which characterize the tundra–forest transition zone of northern Canada. This interpretation is supported by macroscopic plant evidence but conflicts with pollen evidence which implies a climate with warmer summers. To resolve the problem it is proposed that the valley fauna and flora survived in an isolated cold microenvironment surrounded by regionally warmer conditions and for which analogies presently exist on the north and east shores of Lake Superior. |
format |
Article in Journal/Newspaper |
author |
Ashworth, Allan C. |
author_facet |
Ashworth, Allan C. |
author_sort |
Ashworth, Allan C. |
title |
A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance |
title_short |
A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance |
title_full |
A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance |
title_fullStr |
A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance |
title_full_unstemmed |
A late Wisconsinan Coleopterous assemblage from southern Ontario and its environmental significance |
title_sort |
late wisconsinan coleopterous assemblage from southern ontario and its environmental significance |
publisher |
Canadian Science Publishing |
publishDate |
1977 |
url |
http://dx.doi.org/10.1139/e77-138 http://www.nrcresearchpress.com/doi/pdf/10.1139/e77-138 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
Canadian Journal of Earth Sciences volume 14, issue 7, page 1625-1634 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e77-138 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
14 |
container_issue |
7 |
container_start_page |
1625 |
op_container_end_page |
1634 |
_version_ |
1785577748282998784 |