Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake

Until recently, the distribution of diatom and chironomid assemblages and their attributes (species richness/diversity) in relation to water depth and sedimentary environments have been identified but not quantified. The influence of environmental variables on assemblage distribution and taxa richness...

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Autores: Raposeiro, Pedro Miguel, Sáez, Alberto, Giralt Romeu, Santiago, Costa, Ana Cristina, Gonçalves, Vítor
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/122315
Acesso em linha:https://hdl.handle.net/2445/122315
Access Level:acceso abierto
Palavra-chave:Canvi climàtic
Paleoclimatologia
Dípters
Algues fòssils
Climatic change
Paleoclimatology
Diptera
Fossil algae
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spelling Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lakeRaposeiro, Pedro MiguelSáez, AlbertoGiralt Romeu, SantiagoCosta, Ana CristinaGonçalves, VítorCanvi climàticPaleoclimatologiaDíptersAlgues fòssilsClimatic changePaleoclimatologyDipteraFossil algaeUntil recently, the distribution of diatom and chironomid assemblages and their attributes (species richness/diversity) in relation to water depth and sedimentary environments have been identified but not quantified. The influence of environmental variables on assemblage distribution and taxa richness in a deep, monomictic lake in Sao Miguel Island is assessed. Attention is given to community variation along a water -depth gradient. Sediment core samples were analysed for diatom content, chironomids, and grain-size clastic particles along three transects from the shoreline to the central deep basin of the lake at a resolution of 1 m water depth. Linear and unimodal regressions were used to test taxon richness, taxon diversity and taxon evenness versus water depth of each transect. A hump-shaped relationship between species richness and water depth was noted, with a peak occurring at mid-depth, meaning that samples located at that depth better represented the total subfossil assemblage living in lake Azul. Moreover,data indicate that both assemblages in Lake Azul, and taphonomic effects, were influenced by processes of clastic transport depending on the lake morphology. Results from this study allow us to access the spatial distribution of biological assemblages in clastic-dominated lakes with a high topographic gradient, and provide us with principal criteria that will allow us to determine coring locations that capture the true species diversity for studies in lakes.Springer Verlag2018201920182018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion38 p.application/pdfhttps://hdl.handle.net/2445/122315Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1007/s10750-018-3557-4Hydrobiologia, 2018, vol. 815, num. 1, p. 141-163https://doi.org/10.1007/s10750-018-3557-4(c) Springer Verlag, 2018info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1223152026-05-29T05:05:01Z
dc.title.none.fl_str_mv Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
title Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
spellingShingle Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
Raposeiro, Pedro Miguel
Canvi climàtic
Paleoclimatologia
Dípters
Algues fòssils
Climatic change
Paleoclimatology
Diptera
Fossil algae
title_short Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
title_full Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
title_fullStr Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
title_full_unstemmed Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
title_sort Causes of spatial distribution of subfossil diatom and chironomid assemblages in surface sediments of a remote deep island lake
dc.creator.none.fl_str_mv Raposeiro, Pedro Miguel
Sáez, Alberto
Giralt Romeu, Santiago
Costa, Ana Cristina
Gonçalves, Vítor
author Raposeiro, Pedro Miguel
author_facet Raposeiro, Pedro Miguel
Sáez, Alberto
Giralt Romeu, Santiago
Costa, Ana Cristina
Gonçalves, Vítor
author_role author
author2 Sáez, Alberto
Giralt Romeu, Santiago
Costa, Ana Cristina
Gonçalves, Vítor
author2_role author
author
author
author
dc.subject.none.fl_str_mv Canvi climàtic
Paleoclimatologia
Dípters
Algues fòssils
Climatic change
Paleoclimatology
Diptera
Fossil algae
topic Canvi climàtic
Paleoclimatologia
Dípters
Algues fòssils
Climatic change
Paleoclimatology
Diptera
Fossil algae
description Until recently, the distribution of diatom and chironomid assemblages and their attributes (species richness/diversity) in relation to water depth and sedimentary environments have been identified but not quantified. The influence of environmental variables on assemblage distribution and taxa richness in a deep, monomictic lake in Sao Miguel Island is assessed. Attention is given to community variation along a water -depth gradient. Sediment core samples were analysed for diatom content, chironomids, and grain-size clastic particles along three transects from the shoreline to the central deep basin of the lake at a resolution of 1 m water depth. Linear and unimodal regressions were used to test taxon richness, taxon diversity and taxon evenness versus water depth of each transect. A hump-shaped relationship between species richness and water depth was noted, with a peak occurring at mid-depth, meaning that samples located at that depth better represented the total subfossil assemblage living in lake Azul. Moreover,data indicate that both assemblages in Lake Azul, and taphonomic effects, were influenced by processes of clastic transport depending on the lake morphology. Results from this study allow us to access the spatial distribution of biological assemblages in clastic-dominated lakes with a high topographic gradient, and provide us with principal criteria that will allow us to determine coring locations that capture the true species diversity for studies in lakes.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/122315
url https://hdl.handle.net/2445/122315
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1007/s10750-018-3557-4
Hydrobiologia, 2018, vol. 815, num. 1, p. 141-163
https://doi.org/10.1007/s10750-018-3557-4
dc.rights.none.fl_str_mv (c) Springer Verlag, 2018
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Springer Verlag, 2018
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 38 p.
application/pdf
dc.publisher.none.fl_str_mv Springer Verlag
publisher.none.fl_str_mv Springer Verlag
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,228081

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