Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic
Surface sediment diatom assemblages were examined from 26 freshwater sites near Isachsen (78 47 ¢ N, 103 32 ¢ W), Ellef Ringnes Island, a region of diverse and atypical water chemistry for high arctic sites. One hundred and sixty eight diatom taxa were identified from these samples, over 50 % of whi...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.469.4218 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.469.4218 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.469.4218 2023-05-15T14:46:37+02:00 Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic Dermot Antoniades Marianne S. V. Douglas John P. Smol The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.469.4218 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.469.4218 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf Key words diatoms High Arctic biogeography species–environment relationships inference models conductivity text 2004 ftciteseerx 2016-01-08T07:08:21Z Surface sediment diatom assemblages were examined from 26 freshwater sites near Isachsen (78 47 ¢ N, 103 32 ¢ W), Ellef Ringnes Island, a region of diverse and atypical water chemistry for high arctic sites. One hundred and sixty eight diatom taxa were identified from these samples, over 50 % of which had not previously been recorded in the Canadian High Arctic. Variations in diatom assemblages were related to changes in measured environmental variables using multivariate techniques. Canonical correspondence analysis (CCA) indicated that five variables contributed significantly to explaining patterns of diatom variation (i.e., COND, DIC, Mn, TPF, TPU). The first CCA axis (k 0.44) was primarily controlled by conductivity-related variables, while CCA axis 2 (k 0.21) was related to particulate concentrations. Diatom-based inference models were generated for the reconstruction of conductivity (RMSEPjack 0.32, r2jack 0.76) and pH (RMSEPjack 0.40, r2jack 0.69). The strengths of these models indicate that it will be possible to reliably infer past trends in conductivity and pH from diatom assemblages preserved in dated sediment cores from the Isachsen region. Text Arctic Ellef Ringnes Island Unknown Arctic Ellef Ringnes Island ENVELOPE(-102.256,-102.256,78.502,78.502) Isachsen ENVELOPE(-103.505,-103.505,78.785,78.785) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Key words diatoms High Arctic biogeography species–environment relationships inference models conductivity |
spellingShingle |
Key words diatoms High Arctic biogeography species–environment relationships inference models conductivity Dermot Antoniades Marianne S. V. Douglas John P. Smol Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic |
topic_facet |
Key words diatoms High Arctic biogeography species–environment relationships inference models conductivity |
description |
Surface sediment diatom assemblages were examined from 26 freshwater sites near Isachsen (78 47 ¢ N, 103 32 ¢ W), Ellef Ringnes Island, a region of diverse and atypical water chemistry for high arctic sites. One hundred and sixty eight diatom taxa were identified from these samples, over 50 % of which had not previously been recorded in the Canadian High Arctic. Variations in diatom assemblages were related to changes in measured environmental variables using multivariate techniques. Canonical correspondence analysis (CCA) indicated that five variables contributed significantly to explaining patterns of diatom variation (i.e., COND, DIC, Mn, TPF, TPU). The first CCA axis (k 0.44) was primarily controlled by conductivity-related variables, while CCA axis 2 (k 0.21) was related to particulate concentrations. Diatom-based inference models were generated for the reconstruction of conductivity (RMSEPjack 0.32, r2jack 0.76) and pH (RMSEPjack 0.40, r2jack 0.69). The strengths of these models indicate that it will be possible to reliably infer past trends in conductivity and pH from diatom assemblages preserved in dated sediment cores from the Isachsen region. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Dermot Antoniades Marianne S. V. Douglas John P. Smol |
author_facet |
Dermot Antoniades Marianne S. V. Douglas John P. Smol |
author_sort |
Dermot Antoniades |
title |
Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic |
title_short |
Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic |
title_full |
Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic |
title_fullStr |
Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic |
title_full_unstemmed |
Diatom species–environment relationships and inference models from Isachsen, Ellef Ringnes Island, Canadian High Arctic |
title_sort |
diatom species–environment relationships and inference models from isachsen, ellef ringnes island, canadian high arctic |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.469.4218 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf |
long_lat |
ENVELOPE(-102.256,-102.256,78.502,78.502) ENVELOPE(-103.505,-103.505,78.785,78.785) |
geographic |
Arctic Ellef Ringnes Island Isachsen |
geographic_facet |
Arctic Ellef Ringnes Island Isachsen |
genre |
Arctic Ellef Ringnes Island |
genre_facet |
Arctic Ellef Ringnes Island |
op_source |
http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.469.4218 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/Antoniades2004.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766317833393799168 |