On the occurrence of hypersaline sediments in James Bay coastal marshes
Measurements of soil salinity, soil moisture, and specific yield, along with depth to the water table, explain the occurrence of a band of hypersaline sediments, ubiquitous along James Bay coastal marshes, that profoundly affects vegetation development. The salinity of the hypersaline zone ranges fr...
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1991
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crcansciencepubl:10.1139/b91-293 2023-12-17T10:49:06+01:00 On the occurrence of hypersaline sediments in James Bay coastal marshes Price, Jonathan S. 1991 http://dx.doi.org/10.1139/b91-293 http://www.nrcresearchpress.com/doi/pdf/10.1139/b91-293 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 69, issue 10, page 2328-2330 ISSN 0008-4026 Plant Science journal-article 1991 crcansciencepubl https://doi.org/10.1139/b91-293 2023-11-19T13:38:39Z Measurements of soil salinity, soil moisture, and specific yield, along with depth to the water table, explain the occurrence of a band of hypersaline sediments, ubiquitous along James Bay coastal marshes, that profoundly affects vegetation development. The salinity of the hypersaline zone ranges from 8 g/kg Cl in a southern James Bay marsh, to 28 g/kg in the north, nearly an order of magnitude more than local sediments outside this zone. This common, yet previously unexplained, feature restricts the vegetation development to salt-tolerant species such as Salicornia maritima, Puccinellia phryganodes, and Triglochlin maritimum. The hypersaline zone is rarely inundated by tides, but frequent inundation of the seaward zone maintains a high water table there, with soil salinity, hence vegetation patterns that reflect the ambient tidewater salinity. At sites inland of the hypersaline band the development of an organic layer with a high moisture content supplied by meteoric water and high specific yield maintains relatively fresh water near the surface, imposing minimal salinity restrictions to vegetation. Intermediate to these zones of high water table is the hypersaline band, which has no organic layer and whose surface is not wetted by tides. Its depressed water table causes flow convergence, and the only water sink is through evaporation, which concentrates the salt imported in groundwater. Key words: James Bay, marsh, salinity, hydrology, vegetation. Article in Journal/Newspaper Puccinellia phryganodes James Bay Canadian Science Publishing (via Crossref) Canadian Journal of Botany 69 10 2328 2330 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Plant Science |
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Plant Science Price, Jonathan S. On the occurrence of hypersaline sediments in James Bay coastal marshes |
topic_facet |
Plant Science |
description |
Measurements of soil salinity, soil moisture, and specific yield, along with depth to the water table, explain the occurrence of a band of hypersaline sediments, ubiquitous along James Bay coastal marshes, that profoundly affects vegetation development. The salinity of the hypersaline zone ranges from 8 g/kg Cl in a southern James Bay marsh, to 28 g/kg in the north, nearly an order of magnitude more than local sediments outside this zone. This common, yet previously unexplained, feature restricts the vegetation development to salt-tolerant species such as Salicornia maritima, Puccinellia phryganodes, and Triglochlin maritimum. The hypersaline zone is rarely inundated by tides, but frequent inundation of the seaward zone maintains a high water table there, with soil salinity, hence vegetation patterns that reflect the ambient tidewater salinity. At sites inland of the hypersaline band the development of an organic layer with a high moisture content supplied by meteoric water and high specific yield maintains relatively fresh water near the surface, imposing minimal salinity restrictions to vegetation. Intermediate to these zones of high water table is the hypersaline band, which has no organic layer and whose surface is not wetted by tides. Its depressed water table causes flow convergence, and the only water sink is through evaporation, which concentrates the salt imported in groundwater. Key words: James Bay, marsh, salinity, hydrology, vegetation. |
format |
Article in Journal/Newspaper |
author |
Price, Jonathan S. |
author_facet |
Price, Jonathan S. |
author_sort |
Price, Jonathan S. |
title |
On the occurrence of hypersaline sediments in James Bay coastal marshes |
title_short |
On the occurrence of hypersaline sediments in James Bay coastal marshes |
title_full |
On the occurrence of hypersaline sediments in James Bay coastal marshes |
title_fullStr |
On the occurrence of hypersaline sediments in James Bay coastal marshes |
title_full_unstemmed |
On the occurrence of hypersaline sediments in James Bay coastal marshes |
title_sort |
on the occurrence of hypersaline sediments in james bay coastal marshes |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/b91-293 http://www.nrcresearchpress.com/doi/pdf/10.1139/b91-293 |
genre |
Puccinellia phryganodes James Bay |
genre_facet |
Puccinellia phryganodes James Bay |
op_source |
Canadian Journal of Botany volume 69, issue 10, page 2328-2330 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b91-293 |
container_title |
Canadian Journal of Botany |
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69 |
container_issue |
10 |
container_start_page |
2328 |
op_container_end_page |
2330 |
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1785573463284514816 |