From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds

Abstract Biological invasion and environmental change pose major threats to ecosystems. While long‐term ecological change is commonly evaluated through sediment cores in lakes, it is generally not feasible for smaller ponds, and spatial resolution is limited. Here, we analyze pond diatom communities...

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Autores principales:	Tyler J. Kohler, Adrian Howkins, Eric R. Sokol, Katerina Kopalová, Aneliya Cox, Joshua P. Darling, Michael N. Gooseff, Diane M. McKnight
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/29c54ae23d2840f0a4bc02179fa0c589
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spelling	oai:doaj.org-article:29c54ae23d2840f0a4bc02179fa0c5892021-11-08T07:38:25ZFrom the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds2378-224210.1002/lol2.10200https://doaj.org/article/29c54ae23d2840f0a4bc02179fa0c5892021-12-01T00:00:00Zhttps://doi.org/10.1002/lol2.10200https://doaj.org/toc/2378-2242Abstract Biological invasion and environmental change pose major threats to ecosystems. While long‐term ecological change is commonly evaluated through sediment cores in lakes, it is generally not feasible for smaller ponds, and spatial resolution is limited. Here, we analyze pond diatom communities collected during Shackleton's Nimrod expedition at Cape Royds, Antarctica, to compare with the same waterbodies a century later. We find historical samples to be almost identical to modern counterparts, and provide no evidence of exotic introductions despite increasing human activity. However, a shift occurred in the pond nearest Shackleton's hut, Pony Lake, which was dominated by Luticola muticopsis a century ago, and was replaced by Craspedostauros laevissimus. Both are endemic species previously and currently present at Cape Royds, and we hypothesize that a shift in conductivity accompanying changing precipitation patterns may be responsible. Collectively, these results provide important data for assessing human and climate impacts among Antarctic lacustrine habitats.Tyler J. KohlerAdrian HowkinsEric R. SokolKaterina KopalováAneliya CoxJoshua P. DarlingMichael N. GooseffDiane M. McKnightWileyarticleOceanographyGC1-1581ENLimnology and Oceanography Letters, Vol 6, Iss 6, Pp 379-387 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Oceanography GC1-1581
spellingShingle	Oceanography GC1-1581 Tyler J. Kohler Adrian Howkins Eric R. Sokol Katerina Kopalová Aneliya Cox Joshua P. Darling Michael N. Gooseff Diane M. McKnight From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds
description	Abstract Biological invasion and environmental change pose major threats to ecosystems. While long‐term ecological change is commonly evaluated through sediment cores in lakes, it is generally not feasible for smaller ponds, and spatial resolution is limited. Here, we analyze pond diatom communities collected during Shackleton's Nimrod expedition at Cape Royds, Antarctica, to compare with the same waterbodies a century later. We find historical samples to be almost identical to modern counterparts, and provide no evidence of exotic introductions despite increasing human activity. However, a shift occurred in the pond nearest Shackleton's hut, Pony Lake, which was dominated by Luticola muticopsis a century ago, and was replaced by Craspedostauros laevissimus. Both are endemic species previously and currently present at Cape Royds, and we hypothesize that a shift in conductivity accompanying changing precipitation patterns may be responsible. Collectively, these results provide important data for assessing human and climate impacts among Antarctic lacustrine habitats.
format	article
author	Tyler J. Kohler Adrian Howkins Eric R. Sokol Katerina Kopalová Aneliya Cox Joshua P. Darling Michael N. Gooseff Diane M. McKnight
author_facet	Tyler J. Kohler Adrian Howkins Eric R. Sokol Katerina Kopalová Aneliya Cox Joshua P. Darling Michael N. Gooseff Diane M. McKnight
author_sort	Tyler J. Kohler
title	From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds
title_short	From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds
title_full	From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds
title_fullStr	From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds
title_full_unstemmed	From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds
title_sort	from the heroic age to today: what diatoms from shackleton's nimrod expedition can tell us about the ecological trajectory of antarctic ponds
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/29c54ae23d2840f0a4bc02179fa0c589
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From the Heroic Age to today: What diatoms from Shackleton's Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds

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