Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay

Monitoring permafrost and active layer is essential for prognostic research of future climate scenarios. Although biotic factors have a prominent role in active layer behavior, apart from vegetation effects, their influence remains little investigated. It is generally assumed that frozen ground exer...

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Autores: Schaefer, Carlos E.G.R., Pereira, Thiago T.C., Almeida, Ivan C.C., Michel, Roberto F.M., Corrêa, Guilherme R., Figueiredo, Luana P.S., Ker, João C.
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2017
País:Brasil
Recursos:Universidade Federal de Viçosa (UFV)
Repositório:LOCUS Repositório Institucional da UFV
Idioma:inglês
OAI Identifier:oai:locus.ufv.br:123456789/21667
Acesso em linha:https://doi.org/10.1016/j.catena.2016.07.021
http://www.locus.ufv.br/handle/123456789/21667
Access Level:Acceso aberto
Palavra-chave:Permafrost
Ground temperature
Ornithogenic soils
Penguin rookery
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spelling Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope BayPermafrostGround temperatureOrnithogenic soilsPenguin rookeryMonitoring permafrost and active layer is essential for prognostic research of future climate scenarios. Although biotic factors have a prominent role in active layer behavior, apart from vegetation effects, their influence remains little investigated. It is generally assumed that frozen ground exerts influence on nesting fauna, whereas, on the other hand, land colonization by birds, such as penguins can also interfere with the soil thermal regime. However, to our knowledge, no studies report on permafrost and active layer regime changes under penguin activity. We present a comparative study of two adjacent sites located in Hope Bay, one representing an active penguin rookery-S1, and another, an adjacent abandoned site currently vegetated-S2. Soil temperature and water content, and air temperature were monitored hourly from 2009 to 2011. Current penguin activity and the resulting deposition of guano during spring and summer in S1 is an important factor for explaining the higher number of thaw degree days due to direct physical impact and chemical reactions caused by rapid guano decomposition. In the vegetated S2 site, the snow pack lasted longer, showing the highest mean minimum temperature and larger thermal insulation, as well as larger FDD than those found in the bare soil of the active rookery (S1), and lower n-F, due to greater thermal insulation. Penguins played a significant role in changing the active layer depth and thermal regime, and represent a neglected actor on the ground thermal regime in Antarctic terrestrial environments.CATENA2018-09-06T11:03:20Z2018-09-06T11:03:20Z2017-02info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf0341-8162https://doi.org/10.1016/j.catena.2016.07.021http://www.locus.ufv.br/handle/123456789/21667engVolume 149, Part 2, Pages 582-591, February 2017Elsevier B.V.info:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVSchaefer, Carlos E.G.R.Pereira, Thiago T.C.Almeida, Ivan C.C.Michel, Roberto F.M.Corrêa, Guilherme R.Figueiredo, Luana P.S.Ker, João C.2024-07-12T07:36:43Zoai:locus.ufv.br:123456789/21667Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:36:43LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
title Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
spellingShingle Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
Schaefer, Carlos E.G.R.
Permafrost
Ground temperature
Ornithogenic soils
Penguin rookery
title_short Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
title_full Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
title_fullStr Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
title_full_unstemmed Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
title_sort Penguin activity modify the thermal regime of active layer in Antarctica: A case study from Hope Bay
dc.creator.none.fl_str_mv Schaefer, Carlos E.G.R.
Pereira, Thiago T.C.
Almeida, Ivan C.C.
Michel, Roberto F.M.
Corrêa, Guilherme R.
Figueiredo, Luana P.S.
Ker, João C.
author Schaefer, Carlos E.G.R.
author_facet Schaefer, Carlos E.G.R.
Pereira, Thiago T.C.
Almeida, Ivan C.C.
Michel, Roberto F.M.
Corrêa, Guilherme R.
Figueiredo, Luana P.S.
Ker, João C.
author_role author
author2 Pereira, Thiago T.C.
Almeida, Ivan C.C.
Michel, Roberto F.M.
Corrêa, Guilherme R.
Figueiredo, Luana P.S.
Ker, João C.
author2_role author
author
author
author
author
author
dc.subject.por.fl_str_mv Permafrost
Ground temperature
Ornithogenic soils
Penguin rookery
topic Permafrost
Ground temperature
Ornithogenic soils
Penguin rookery
description Monitoring permafrost and active layer is essential for prognostic research of future climate scenarios. Although biotic factors have a prominent role in active layer behavior, apart from vegetation effects, their influence remains little investigated. It is generally assumed that frozen ground exerts influence on nesting fauna, whereas, on the other hand, land colonization by birds, such as penguins can also interfere with the soil thermal regime. However, to our knowledge, no studies report on permafrost and active layer regime changes under penguin activity. We present a comparative study of two adjacent sites located in Hope Bay, one representing an active penguin rookery-S1, and another, an adjacent abandoned site currently vegetated-S2. Soil temperature and water content, and air temperature were monitored hourly from 2009 to 2011. Current penguin activity and the resulting deposition of guano during spring and summer in S1 is an important factor for explaining the higher number of thaw degree days due to direct physical impact and chemical reactions caused by rapid guano decomposition. In the vegetated S2 site, the snow pack lasted longer, showing the highest mean minimum temperature and larger thermal insulation, as well as larger FDD than those found in the bare soil of the active rookery (S1), and lower n-F, due to greater thermal insulation. Penguins played a significant role in changing the active layer depth and thermal regime, and represent a neglected actor on the ground thermal regime in Antarctic terrestrial environments.
publishDate 2017
dc.date.none.fl_str_mv 2017-02
2018-09-06T11:03:20Z
2018-09-06T11:03:20Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 0341-8162
https://doi.org/10.1016/j.catena.2016.07.021
http://www.locus.ufv.br/handle/123456789/21667
identifier_str_mv 0341-8162
url https://doi.org/10.1016/j.catena.2016.07.021
http://www.locus.ufv.br/handle/123456789/21667
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Volume 149, Part 2, Pages 582-591, February 2017
dc.rights.driver.fl_str_mv Elsevier B.V.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Elsevier B.V.
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv pdf
application/pdf
dc.publisher.none.fl_str_mv CATENA
publisher.none.fl_str_mv CATENA
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
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institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv fabiojreis@ufv.br
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