Multiple drivers of ecological change in Arctic lakes and ponds.

Griffiths et al. (2017) analyzed several ponds and lakes from the Cape Herschel region of Ellesmere Island in order to "…explicitly examine the role of ice cover as the dominant driver of diatom assemblage change…". I reanalyze their data and suggest that their classification scheme, that...

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Autor principal:	Konrad Gajewski
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/71e52580867e4a0984ff186f42d1db4e
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id	oai:doaj.org-article:71e52580867e4a0984ff186f42d1db4e
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spelling	oai:doaj.org-article:71e52580867e4a0984ff186f42d1db4e2021-12-02T20:08:47ZMultiple drivers of ecological change in Arctic lakes and ponds.1932-620310.1371/journal.pone.0254257https://doaj.org/article/71e52580867e4a0984ff186f42d1db4e2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254257https://doaj.org/toc/1932-6203Griffiths et al. (2017) analyzed several ponds and lakes from the Cape Herschel region of Ellesmere Island in order to "…explicitly examine the role of ice cover as the dominant driver of diatom assemblage change…". I reanalyze their data and suggest that their classification scheme, that they propose is due to differences in ice cover seasonality ("warm", "cool", "cold", and "oasis"), is confounded with other morphological and chemical variables that better explain the differences between the groups. The "cold" sites are the deepest (lakes) and differ from the small, shallow ponds that occasionally dry, which would therefore have different diatom assemblages and histories. The "oasis" sites are nutrient enriched and probably have more stable water supplies, thereby enabling an aquatic flora providing habitats for diatoms. A key part of their interpretation is that "warm" sites have responded more rapidly to recent climate change than "cold" or "cool" sites, but their chronologies do not allow for such a conclusion. There is no clear difference between "cool" and "warm" sites, and problems in dating the sequences means inferences about their histories are not supported by data. Their results, which are restricted to the past century, are contradicted by a Holocene sequence from the region.Konrad GajewskiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254257 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Konrad Gajewski Multiple drivers of ecological change in Arctic lakes and ponds.
description	Griffiths et al. (2017) analyzed several ponds and lakes from the Cape Herschel region of Ellesmere Island in order to "…explicitly examine the role of ice cover as the dominant driver of diatom assemblage change…". I reanalyze their data and suggest that their classification scheme, that they propose is due to differences in ice cover seasonality ("warm", "cool", "cold", and "oasis"), is confounded with other morphological and chemical variables that better explain the differences between the groups. The "cold" sites are the deepest (lakes) and differ from the small, shallow ponds that occasionally dry, which would therefore have different diatom assemblages and histories. The "oasis" sites are nutrient enriched and probably have more stable water supplies, thereby enabling an aquatic flora providing habitats for diatoms. A key part of their interpretation is that "warm" sites have responded more rapidly to recent climate change than "cold" or "cool" sites, but their chronologies do not allow for such a conclusion. There is no clear difference between "cool" and "warm" sites, and problems in dating the sequences means inferences about their histories are not supported by data. Their results, which are restricted to the past century, are contradicted by a Holocene sequence from the region.
format	article
author	Konrad Gajewski
author_facet	Konrad Gajewski
author_sort	Konrad Gajewski
title	Multiple drivers of ecological change in Arctic lakes and ponds.
title_short	Multiple drivers of ecological change in Arctic lakes and ponds.
title_full	Multiple drivers of ecological change in Arctic lakes and ponds.
title_fullStr	Multiple drivers of ecological change in Arctic lakes and ponds.
title_full_unstemmed	Multiple drivers of ecological change in Arctic lakes and ponds.
title_sort	multiple drivers of ecological change in arctic lakes and ponds.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/71e52580867e4a0984ff186f42d1db4e
work_keys_str_mv	AT konradgajewski multipledriversofecologicalchangeinarcticlakesandponds
_version_	1718375129899073536

Multiple drivers of ecological change in Arctic lakes and ponds.

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