Paleoecological aspects of the Red Lake Peatland, northern Minnesota
The Red Lake Peatland, situated on the eastern arm of the Lake Agassiz plain in north central Minnesota, is made up of large black spruce raised bogs separated by sedge-covered water tracks marked by string patterns and teardrop-shaped forested islands. About 3 m of peat overlie a prairie soil; the...
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Canadian Science Publishing
1977
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crcansciencepubl:10.1139/b77-025 2023-12-17T10:28:44+01:00 Paleoecological aspects of the Red Lake Peatland, northern Minnesota Griffin, Kerstin O. 1977 http://dx.doi.org/10.1139/b77-025 http://www.nrcresearchpress.com/doi/pdf/10.1139/b77-025 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 55, issue 2, page 172-192 ISSN 0008-4026 Plant Science journal-article 1977 crcansciencepubl https://doi.org/10.1139/b77-025 2023-11-19T13:38:36Z The Red Lake Peatland, situated on the eastern arm of the Lake Agassiz plain in north central Minnesota, is made up of large black spruce raised bogs separated by sedge-covered water tracks marked by string patterns and teardrop-shaped forested islands. About 3 m of peat overlie a prairie soil; the basal peat is 3170 ± 100 years old ( 14 C date). Stratigraphic distribution of pollen, macrofossils, and peat components in a series of cores along a small forested island was used to study the development of the peatland.In pollen zone RLB-1 (lowest) the upland pollen types suggest an oak savanna with a developing mesic deciduous forest. The local pollen indicates a succession from a Typha marsh to a sedge meadow. Zone 2 shows a small rise in Pinus pollen; Ericaceae pollen and Sphagnum spores indicate the development of a bog–heath vegetation type at the coring site. An increase in pollen of spruce and larch reflects the establishment of the island forest. Zone 3 is marked by a rise in Ambrosia pollen, recording agricultural land clearance in northwestern Minnesota in about 1890.The Salix–herb macrofossil assemblage occurs at the base of some cores; it is succeeded stratigraphically by the Typha–Scirpus assemblage, which also makes up the base of the remaining cores. There follows the Carex diandra – Carex aquatilis assemblage, suggesting a sedge meadow. The overlying Menyanthes–Larix assemblage continues to the surface under the sedge fen; under the island, seeds of Chamaedaphne and needles of Picea occur in this assemblage. The incoming of the Menyanthes–Larix assemblage is believed to reflect the first development of the patterned wetland.Reed peat comprises the bottom 20–50 cm of all cores; it corresponds with the lower part of pollen zone 1 and contains the Typha–Scirpus macrofossil assemblage. Pure sedge peat or sedge peat with Bryales corresponds with zone 2 and upper zone 1 of the pollen diagram and contains the Carex diandra –C. aquatilis macrofossil assemblage. Ericaceous peat occurs only under the island, ... Article in Journal/Newspaper Carex aquatilis Canadian Science Publishing (via Crossref) Red Lake ENVELOPE(-113.118,-113.118,63.267,63.267) Teardrop ENVELOPE(163.917,163.917,-78.150,-78.150) Canadian Journal of Botany 55 2 172 192 |
institution |
Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
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English |
topic |
Plant Science |
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Plant Science Griffin, Kerstin O. Paleoecological aspects of the Red Lake Peatland, northern Minnesota |
topic_facet |
Plant Science |
description |
The Red Lake Peatland, situated on the eastern arm of the Lake Agassiz plain in north central Minnesota, is made up of large black spruce raised bogs separated by sedge-covered water tracks marked by string patterns and teardrop-shaped forested islands. About 3 m of peat overlie a prairie soil; the basal peat is 3170 ± 100 years old ( 14 C date). Stratigraphic distribution of pollen, macrofossils, and peat components in a series of cores along a small forested island was used to study the development of the peatland.In pollen zone RLB-1 (lowest) the upland pollen types suggest an oak savanna with a developing mesic deciduous forest. The local pollen indicates a succession from a Typha marsh to a sedge meadow. Zone 2 shows a small rise in Pinus pollen; Ericaceae pollen and Sphagnum spores indicate the development of a bog–heath vegetation type at the coring site. An increase in pollen of spruce and larch reflects the establishment of the island forest. Zone 3 is marked by a rise in Ambrosia pollen, recording agricultural land clearance in northwestern Minnesota in about 1890.The Salix–herb macrofossil assemblage occurs at the base of some cores; it is succeeded stratigraphically by the Typha–Scirpus assemblage, which also makes up the base of the remaining cores. There follows the Carex diandra – Carex aquatilis assemblage, suggesting a sedge meadow. The overlying Menyanthes–Larix assemblage continues to the surface under the sedge fen; under the island, seeds of Chamaedaphne and needles of Picea occur in this assemblage. The incoming of the Menyanthes–Larix assemblage is believed to reflect the first development of the patterned wetland.Reed peat comprises the bottom 20–50 cm of all cores; it corresponds with the lower part of pollen zone 1 and contains the Typha–Scirpus macrofossil assemblage. Pure sedge peat or sedge peat with Bryales corresponds with zone 2 and upper zone 1 of the pollen diagram and contains the Carex diandra –C. aquatilis macrofossil assemblage. Ericaceous peat occurs only under the island, ... |
format |
Article in Journal/Newspaper |
author |
Griffin, Kerstin O. |
author_facet |
Griffin, Kerstin O. |
author_sort |
Griffin, Kerstin O. |
title |
Paleoecological aspects of the Red Lake Peatland, northern Minnesota |
title_short |
Paleoecological aspects of the Red Lake Peatland, northern Minnesota |
title_full |
Paleoecological aspects of the Red Lake Peatland, northern Minnesota |
title_fullStr |
Paleoecological aspects of the Red Lake Peatland, northern Minnesota |
title_full_unstemmed |
Paleoecological aspects of the Red Lake Peatland, northern Minnesota |
title_sort |
paleoecological aspects of the red lake peatland, northern minnesota |
publisher |
Canadian Science Publishing |
publishDate |
1977 |
url |
http://dx.doi.org/10.1139/b77-025 http://www.nrcresearchpress.com/doi/pdf/10.1139/b77-025 |
long_lat |
ENVELOPE(-113.118,-113.118,63.267,63.267) ENVELOPE(163.917,163.917,-78.150,-78.150) |
geographic |
Red Lake Teardrop |
geographic_facet |
Red Lake Teardrop |
genre |
Carex aquatilis |
genre_facet |
Carex aquatilis |
op_source |
Canadian Journal of Botany volume 55, issue 2, page 172-192 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b77-025 |
container_title |
Canadian Journal of Botany |
container_volume |
55 |
container_issue |
2 |
container_start_page |
172 |
op_container_end_page |
192 |
_version_ |
1785580914176163840 |