Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba
The salt marshes at La Pérouse Bay, Manitoba, are described. Unconsolidated, water-saturated sediment is colonized by Hippuris tetraphylla, Puccinellia phryganodes, and Carex subspathacea. These sediments undergo frost heave, and on elevated mounds, Elymus arenarius var. mollis and Salix brachycarpa...
Published in: | Canadian Journal of Botany |
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Language: | English |
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Canadian Science Publishing
1979
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Online Access: | http://dx.doi.org/10.1139/b79-178 http://www.nrcresearchpress.com/doi/pdf/10.1139/b79-178 |
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crcansciencepubl:10.1139/b79-178 2024-09-15T18:01:44+00:00 Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba Jefferies, R. L. Jensen, A. Abraham, K. F. 1979 http://dx.doi.org/10.1139/b79-178 http://www.nrcresearchpress.com/doi/pdf/10.1139/b79-178 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 57, issue 13, page 1439-1450 ISSN 0008-4026 journal-article 1979 crcansciencepubl https://doi.org/10.1139/b79-178 2024-07-25T04:10:03Z The salt marshes at La Pérouse Bay, Manitoba, are described. Unconsolidated, water-saturated sediment is colonized by Hippuris tetraphylla, Puccinellia phryganodes, and Carex subspathacea. These sediments undergo frost heave, and on elevated mounds, Elymus arenarius var. mollis and Salix brachycarpa become established. This last species is the dominant one of the low willow tundra, which is the characteristic vegetation of the coastal strip. Where drainage is impeded in the upper marsh, relatively high salinities occur and species such as Salicornia europaea agg. and Triglochin maritima are present.A population of 10 000 to 20 000 lesser snow geese (Anser caerulescens) feed, in summer, on Puccinellia phryganodes, Carex subspathacea, Potentilla egedii, and Elymus arenarius var. mollis. The birds strip the shallow turf of Puccinellia in low lying areas between clumps of willow. This terracing of the surface creates depressions which become filled with water and ice. The role of geese in producing these ponds in the upper levels of salt marshes in the Arctic does not appear to have been reported previously. The ponds are subsequently colonized by Carex aquatilis and Triglochin maritima. The salt marsh gives way to an extensive fresh water marsh dominated by species of Salix, Eriophorum angustifolium, Calamagrostis neglecta, and Dupontia fisheri. The results are compared with data from other salt marshes in Hudson Bay and in the Arctic. Article in Journal/Newspaper Carex aquatilis Dupontia fisheri Eriophorum Hudson Bay Puccinellia phryganodes Tundra Canadian Science Publishing Canadian Journal of Botany 57 13 1439 1450 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The salt marshes at La Pérouse Bay, Manitoba, are described. Unconsolidated, water-saturated sediment is colonized by Hippuris tetraphylla, Puccinellia phryganodes, and Carex subspathacea. These sediments undergo frost heave, and on elevated mounds, Elymus arenarius var. mollis and Salix brachycarpa become established. This last species is the dominant one of the low willow tundra, which is the characteristic vegetation of the coastal strip. Where drainage is impeded in the upper marsh, relatively high salinities occur and species such as Salicornia europaea agg. and Triglochin maritima are present.A population of 10 000 to 20 000 lesser snow geese (Anser caerulescens) feed, in summer, on Puccinellia phryganodes, Carex subspathacea, Potentilla egedii, and Elymus arenarius var. mollis. The birds strip the shallow turf of Puccinellia in low lying areas between clumps of willow. This terracing of the surface creates depressions which become filled with water and ice. The role of geese in producing these ponds in the upper levels of salt marshes in the Arctic does not appear to have been reported previously. The ponds are subsequently colonized by Carex aquatilis and Triglochin maritima. The salt marsh gives way to an extensive fresh water marsh dominated by species of Salix, Eriophorum angustifolium, Calamagrostis neglecta, and Dupontia fisheri. The results are compared with data from other salt marshes in Hudson Bay and in the Arctic. |
format |
Article in Journal/Newspaper |
author |
Jefferies, R. L. Jensen, A. Abraham, K. F. |
spellingShingle |
Jefferies, R. L. Jensen, A. Abraham, K. F. Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba |
author_facet |
Jefferies, R. L. Jensen, A. Abraham, K. F. |
author_sort |
Jefferies, R. L. |
title |
Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba |
title_short |
Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba |
title_full |
Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba |
title_fullStr |
Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba |
title_full_unstemmed |
Vegetational development and the effect of geese on vegetation at La Pérouse Bay, Manitoba |
title_sort |
vegetational development and the effect of geese on vegetation at la pérouse bay, manitoba |
publisher |
Canadian Science Publishing |
publishDate |
1979 |
url |
http://dx.doi.org/10.1139/b79-178 http://www.nrcresearchpress.com/doi/pdf/10.1139/b79-178 |
genre |
Carex aquatilis Dupontia fisheri Eriophorum Hudson Bay Puccinellia phryganodes Tundra |
genre_facet |
Carex aquatilis Dupontia fisheri Eriophorum Hudson Bay Puccinellia phryganodes Tundra |
op_source |
Canadian Journal of Botany volume 57, issue 13, page 1439-1450 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b79-178 |
container_title |
Canadian Journal of Botany |
container_volume |
57 |
container_issue |
13 |
container_start_page |
1439 |
op_container_end_page |
1450 |
_version_ |
1810438811737391104 |