Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada
ABSTRACT. Marine molluscs, including bivalves, gastropods and scaphopods, were recovered by dredging at depths of 3–82 m in Expedition Fiord, Axel Heiberg Island, Canada. Cluster analysis, based on presence/absence data at 27 stations, defined two mollusc associations within the fiord. A Portlandia-...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1995
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.9536 http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.574.9536 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.574.9536 2023-05-15T14:19:43+02:00 Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada Alec E. Aitken Robert Gilbert The Pennsylvania State University CiteSeerX Archives 1995 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.9536 http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.9536 http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf Key words mollusca fiords Canadian Arctic Axel Heiberg Island Greenland ecology zoogeography text 1995 ftciteseerx 2016-01-08T12:42:42Z ABSTRACT. Marine molluscs, including bivalves, gastropods and scaphopods, were recovered by dredging at depths of 3–82 m in Expedition Fiord, Axel Heiberg Island, Canada. Cluster analysis, based on presence/absence data at 27 stations, defined two mollusc associations within the fiord. A Portlandia-Thyasira association, characterized by the abundance of Portlandia arctica and Thyasira gouldi, inhabits silty clay substrates at depths of 32–82 m throughout the fiord. An Astarte association, characterized by the abundance of Astarte borealis and Astarte warhami, inhabits sandy mud substrates at depths of 3–32 m in the middle and outer fiord. The absence of this mollusc association at the fiord head suggests that the suspension-feeding molluscs that constitute this association, such as Astarte, Hiatella, Mya and Trichotropis, are intolerant of the lowered salinities and high suspended-sediment concentrations created by the discharge of Expedition River into the fiord-head environment. The Expedition Fiord molluscan fauna is compared to the molluscan fauna recorded in Jørgen Brønlund Fjord, Greenland. In the latter fiord, shallow-water (5–19 m) molluscan faunas are characterized by the abundance of Portlandia arctica and Hiatella arctica, while deep-water (22–48 m) faunas are characterized by the abundance of Thyasira dunbari. Molluscs recovered live in both of these fiords are distributed widely in high-latitude fiord and continental shelf environments. Text Arctic Arctic Axel Heiberg Island Greenland Northwest Territories Unknown Arctic Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Canada Expedition Fiord ENVELOPE(-92.001,-92.001,79.335,79.335) Expedition River ENVELOPE(-91.117,-91.117,79.369,79.369) Greenland Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Jørgen Brønlund Fjord ENVELOPE(-30.750,-30.750,82.183,82.183) Northwest Territories |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Key words mollusca fiords Canadian Arctic Axel Heiberg Island Greenland ecology zoogeography |
spellingShingle |
Key words mollusca fiords Canadian Arctic Axel Heiberg Island Greenland ecology zoogeography Alec E. Aitken Robert Gilbert Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada |
topic_facet |
Key words mollusca fiords Canadian Arctic Axel Heiberg Island Greenland ecology zoogeography |
description |
ABSTRACT. Marine molluscs, including bivalves, gastropods and scaphopods, were recovered by dredging at depths of 3–82 m in Expedition Fiord, Axel Heiberg Island, Canada. Cluster analysis, based on presence/absence data at 27 stations, defined two mollusc associations within the fiord. A Portlandia-Thyasira association, characterized by the abundance of Portlandia arctica and Thyasira gouldi, inhabits silty clay substrates at depths of 32–82 m throughout the fiord. An Astarte association, characterized by the abundance of Astarte borealis and Astarte warhami, inhabits sandy mud substrates at depths of 3–32 m in the middle and outer fiord. The absence of this mollusc association at the fiord head suggests that the suspension-feeding molluscs that constitute this association, such as Astarte, Hiatella, Mya and Trichotropis, are intolerant of the lowered salinities and high suspended-sediment concentrations created by the discharge of Expedition River into the fiord-head environment. The Expedition Fiord molluscan fauna is compared to the molluscan fauna recorded in Jørgen Brønlund Fjord, Greenland. In the latter fiord, shallow-water (5–19 m) molluscan faunas are characterized by the abundance of Portlandia arctica and Hiatella arctica, while deep-water (22–48 m) faunas are characterized by the abundance of Thyasira dunbari. Molluscs recovered live in both of these fiords are distributed widely in high-latitude fiord and continental shelf environments. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Alec E. Aitken Robert Gilbert |
author_facet |
Alec E. Aitken Robert Gilbert |
author_sort |
Alec E. Aitken |
title |
Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada |
title_short |
Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada |
title_full |
Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada |
title_fullStr |
Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada |
title_full_unstemmed |
Marine Mollusca from Expedition Fiord, Western Axel Heiberg Island, Northwest Territories, Canada |
title_sort |
marine mollusca from expedition fiord, western axel heiberg island, northwest territories, canada |
publishDate |
1995 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.9536 http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf |
long_lat |
ENVELOPE(-91.001,-91.001,79.752,79.752) ENVELOPE(-92.001,-92.001,79.335,79.335) ENVELOPE(-91.117,-91.117,79.369,79.369) ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-30.750,-30.750,82.183,82.183) |
geographic |
Arctic Axel Heiberg Island Canada Expedition Fiord Expedition River Greenland Heiberg Jørgen Brønlund Fjord Northwest Territories |
geographic_facet |
Arctic Axel Heiberg Island Canada Expedition Fiord Expedition River Greenland Heiberg Jørgen Brønlund Fjord Northwest Territories |
genre |
Arctic Arctic Axel Heiberg Island Greenland Northwest Territories |
genre_facet |
Arctic Arctic Axel Heiberg Island Greenland Northwest Territories |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.9536 http://pubs.aina.ucalgary.ca/arctic/Arctic49-1-29.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291463486832640 |