Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds
Recent climate change has been especially pronounced in the High Arctic, however, the responses of aquatic biota, such as diatoms, can be modified by site-specific environmental characteristics. To assess if climate-mediated ice cover changes affect the diatom response to climate, we used paleolimno...
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Dryad
2017
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Online Access: | https://doi.org/10.5061/dryad.g7h7n |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::f44ef0c8c1f6e4ea83087d31841d7d81 2023-05-15T14:48:41+02:00 Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds Griffiths, Katherine Michelutti, Neal Sugar, Madeline Douglas, Marianne S.V. Smol, John P. Douglas, Marianne S. V. 2017-03-30 https://doi.org/10.5061/dryad.g7h7n en eng Dryad http://dx.doi.org/10.5061/dryad.g7h7n https://dx.doi.org/10.5061/dryad.g7h7n lic_creative-commons 10.5061/dryad.g7h7n oai:easy.dans.knaw.nl:easy-dataset:95693 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:95693 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 re3data_____::r3d100000044 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 Anthropocene diatoms Ice cover paleolimnology Bacillariophyceae Life sciences medicine and health care climate change Arctic Canadian High Arctic Ellesmere Island Pim Island envir geo Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2017 fttriple https://doi.org/10.5061/dryad.g7h7n 2023-01-22T16:51:58Z Recent climate change has been especially pronounced in the High Arctic, however, the responses of aquatic biota, such as diatoms, can be modified by site-specific environmental characteristics. To assess if climate-mediated ice cover changes affect the diatom response to climate, we used paleolimnological techniques to examine shifts in diatom assemblages from ten High Arctic lakes and ponds from Ellesmere Island and nearby Pim Island (Nunavut, Canada). The sites were divided a priori into four groups (“warm”, “cool”, “cold”, and “oasis”) based on local elevation and microclimatic differences that result in differing lengths of the ice-free season, as well as about three decades of personal observations. We characterized the species changes as a shift from Condition 1 (i.e. a generally low diversity, predominantly epipelic and epilithic diatom assemblage) to Condition 2 (i.e. a typically more diverse and ecologically complex assemblage with an increasing proportion of epiphytic species). This shift from Condition 1 to Condition 2 was a consistent pattern recorded across the sites that experienced a change in ice cover with warming. The “warm” sites are amongst the first to lose their ice covers in summer and recorded the earliest and highest magnitude changes. The “cool” sites also exhibited a shift from Condition 1 to Condition 2, but, as predicted, the timing of the response lagged the “warm” sites. Meanwhile some of the “cold” sites, which until recently still retained an ice raft in summer, only exhibited this shift in the upper-most sediments. The warmer “oasis” ponds likely supported aquatic vegetation throughout their records. Consequently, the diatoms of the “oasis” sites were characterized as high-diversity, Condition 2 assemblages throughout the record. Our results support the hypothesis that the length of the ice-free season is the principal driver of diatom assemblage responses to climate in the High Arctic, largely driven by the establishment of new aquatic habitats, resulting in increased ... Dataset Arctic Climate change Ellesmere Island Nunavut Unknown Arctic Nunavut Ellesmere Island Canada Pim Island ENVELOPE(-74.430,-74.430,78.725,78.725) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Anthropocene diatoms Ice cover paleolimnology Bacillariophyceae Life sciences medicine and health care climate change Arctic Canadian High Arctic Ellesmere Island Pim Island envir geo |
spellingShingle |
Anthropocene diatoms Ice cover paleolimnology Bacillariophyceae Life sciences medicine and health care climate change Arctic Canadian High Arctic Ellesmere Island Pim Island envir geo Griffiths, Katherine Michelutti, Neal Sugar, Madeline Douglas, Marianne S.V. Smol, John P. Douglas, Marianne S. V. Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds |
topic_facet |
Anthropocene diatoms Ice cover paleolimnology Bacillariophyceae Life sciences medicine and health care climate change Arctic Canadian High Arctic Ellesmere Island Pim Island envir geo |
description |
Recent climate change has been especially pronounced in the High Arctic, however, the responses of aquatic biota, such as diatoms, can be modified by site-specific environmental characteristics. To assess if climate-mediated ice cover changes affect the diatom response to climate, we used paleolimnological techniques to examine shifts in diatom assemblages from ten High Arctic lakes and ponds from Ellesmere Island and nearby Pim Island (Nunavut, Canada). The sites were divided a priori into four groups (“warm”, “cool”, “cold”, and “oasis”) based on local elevation and microclimatic differences that result in differing lengths of the ice-free season, as well as about three decades of personal observations. We characterized the species changes as a shift from Condition 1 (i.e. a generally low diversity, predominantly epipelic and epilithic diatom assemblage) to Condition 2 (i.e. a typically more diverse and ecologically complex assemblage with an increasing proportion of epiphytic species). This shift from Condition 1 to Condition 2 was a consistent pattern recorded across the sites that experienced a change in ice cover with warming. The “warm” sites are amongst the first to lose their ice covers in summer and recorded the earliest and highest magnitude changes. The “cool” sites also exhibited a shift from Condition 1 to Condition 2, but, as predicted, the timing of the response lagged the “warm” sites. Meanwhile some of the “cold” sites, which until recently still retained an ice raft in summer, only exhibited this shift in the upper-most sediments. The warmer “oasis” ponds likely supported aquatic vegetation throughout their records. Consequently, the diatoms of the “oasis” sites were characterized as high-diversity, Condition 2 assemblages throughout the record. Our results support the hypothesis that the length of the ice-free season is the principal driver of diatom assemblage responses to climate in the High Arctic, largely driven by the establishment of new aquatic habitats, resulting in increased ... |
format |
Dataset |
author |
Griffiths, Katherine Michelutti, Neal Sugar, Madeline Douglas, Marianne S.V. Smol, John P. Douglas, Marianne S. V. |
author_facet |
Griffiths, Katherine Michelutti, Neal Sugar, Madeline Douglas, Marianne S.V. Smol, John P. Douglas, Marianne S. V. |
author_sort |
Griffiths, Katherine |
title |
Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds |
title_short |
Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds |
title_full |
Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds |
title_fullStr |
Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds |
title_full_unstemmed |
Data from: Ice-cover is the principal driver of ecological change in High Arctic lakes and ponds |
title_sort |
data from: ice-cover is the principal driver of ecological change in high arctic lakes and ponds |
publisher |
Dryad |
publishDate |
2017 |
url |
https://doi.org/10.5061/dryad.g7h7n |
long_lat |
ENVELOPE(-74.430,-74.430,78.725,78.725) |
geographic |
Arctic Nunavut Ellesmere Island Canada Pim Island |
geographic_facet |
Arctic Nunavut Ellesmere Island Canada Pim Island |
genre |
Arctic Climate change Ellesmere Island Nunavut |
genre_facet |
Arctic Climate change Ellesmere Island Nunavut |
op_source |
10.5061/dryad.g7h7n oai:easy.dans.knaw.nl:easy-dataset:95693 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:95693 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 re3data_____::r3d100000044 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 |
op_relation |
http://dx.doi.org/10.5061/dryad.g7h7n https://dx.doi.org/10.5061/dryad.g7h7n |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.g7h7n |
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1766319776374718464 |