Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1080/01916122.2017.1386843 http://hdl.handle.net/11449/170399 |
Resumo: | This work presents the first description of a palynological assemblage preserved in sediments deposited in a saline lake (salina) in the Nhecolândia area of the Brazilian Pantanal. Pollen studies from salinas have been underappreciated due to inferred taphonomic issues related to elevated alkalinity. We have found a well-preserved assemblage that allowed the reconstruction of the history of local vegetation. Radiocarbon dating revealed a constant deposition since ∼3760 calibrated years before present (cal yrs BP), and pollen analyses suggested two main phases of vegetation and environmental development. From 3760 to 1510 cal yrs BP, the site was a swamp to shallow lake dominated by cattails (Typha domingensis) and Poaceae. From 1510 cal yrs BP to the present the herbaceous community is enriched with Cyperaceae and Bromeliaceae, and with tree taxa such as the Arecaceae (palm trees), evidencing the local development of a fringe vegetation. These two phases were interpreted as a change from drier to wetter settings, largely in agreement with regional lake and speleothem records, as well as pollen and carbon isotope studies from other locations in central South America during the latest Holocene. Given that salinas are non-floodable and pollen was found to be well preserved, we highlight the potential of palaeopalynology in these environments as a source of palaeoecological information for the Pantanal Basin. |
id |
UNSP_d2f720df4f87ea999f7cbe8d7a778924 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/170399 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazilenvironmental changepollenQuaternarysaline lakeTaquari megafanwetlandThis work presents the first description of a palynological assemblage preserved in sediments deposited in a saline lake (salina) in the Nhecolândia area of the Brazilian Pantanal. Pollen studies from salinas have been underappreciated due to inferred taphonomic issues related to elevated alkalinity. We have found a well-preserved assemblage that allowed the reconstruction of the history of local vegetation. Radiocarbon dating revealed a constant deposition since ∼3760 calibrated years before present (cal yrs BP), and pollen analyses suggested two main phases of vegetation and environmental development. From 3760 to 1510 cal yrs BP, the site was a swamp to shallow lake dominated by cattails (Typha domingensis) and Poaceae. From 1510 cal yrs BP to the present the herbaceous community is enriched with Cyperaceae and Bromeliaceae, and with tree taxa such as the Arecaceae (palm trees), evidencing the local development of a fringe vegetation. These two phases were interpreted as a change from drier to wetter settings, largely in agreement with regional lake and speleothem records, as well as pollen and carbon isotope studies from other locations in central South America during the latest Holocene. Given that salinas are non-floodable and pollen was found to be well preserved, we highlight the potential of palaeopalynology in these environments as a source of palaeoecological information for the Pantanal Basin.Paleontology and Palynology Laboratory, Department of Geosciences, Universidade Federal de Mato Grosso (UFMT), Av. Fernando Corrêa da Costa 2367, Boa Esperança, Cuiabá-MT 78060-900, BrazilInstituto de Geociências, Unesp – Univ Estadual Paulista Rio Claro-SP, Av. 24 A, 1515, Rio Claro-SP 13506-900, BrazilInstituto Federal do Paraná (IFPR), Campus Assis Chateaubriand, Av. Cívica475, Centro Cívico, Assis Chateaubriand-PR 85935-000 BrazilSmithsonian Tropical Research Institute (STRI), Box 0843-03092, Balboa, Ancon, Republic of PanamaUniversidade Estadual Paulista (Unesp)Becker, B. F.da Silva-Caminha, S. A.F.Guerreiro, R. L.de Oliveira, E. J.D'Apolito, C.Assine, M. L.2018-12-11T16:50:38Z2018-12-11T16:50:38Z2017-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-9application/pdfhttp://dx.doi.org/10.1080/01916122.2017.1386843Palynology, p. 1-9.0191-6122http://hdl.handle.net/11449/17039910.1080/01916122.2017.13868432-s2.0-850346349862-s2.0-85034634986.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPalynology0,590info:eu-repo/semantics/openAccess2023-10-23T06:09:08Zoai:repositorio.unesp.br:11449/170399Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-23T06:09:08Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
title |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
spellingShingle |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil Becker, B. F. environmental change pollen Quaternary saline lake Taquari megafan wetland |
title_short |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
title_full |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
title_fullStr |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
title_full_unstemmed |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
title_sort |
Late Holocene palynology of a saline lake in the Pantanal of Nhecolândia, Brazil |
author |
Becker, B. F. |
author_facet |
Becker, B. F. da Silva-Caminha, S. A.F. Guerreiro, R. L. de Oliveira, E. J. D'Apolito, C. Assine, M. L. |
author_role |
author |
author2 |
da Silva-Caminha, S. A.F. Guerreiro, R. L. de Oliveira, E. J. D'Apolito, C. Assine, M. L. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Becker, B. F. da Silva-Caminha, S. A.F. Guerreiro, R. L. de Oliveira, E. J. D'Apolito, C. Assine, M. L. |
dc.subject.por.fl_str_mv |
environmental change pollen Quaternary saline lake Taquari megafan wetland |
topic |
environmental change pollen Quaternary saline lake Taquari megafan wetland |
description |
This work presents the first description of a palynological assemblage preserved in sediments deposited in a saline lake (salina) in the Nhecolândia area of the Brazilian Pantanal. Pollen studies from salinas have been underappreciated due to inferred taphonomic issues related to elevated alkalinity. We have found a well-preserved assemblage that allowed the reconstruction of the history of local vegetation. Radiocarbon dating revealed a constant deposition since ∼3760 calibrated years before present (cal yrs BP), and pollen analyses suggested two main phases of vegetation and environmental development. From 3760 to 1510 cal yrs BP, the site was a swamp to shallow lake dominated by cattails (Typha domingensis) and Poaceae. From 1510 cal yrs BP to the present the herbaceous community is enriched with Cyperaceae and Bromeliaceae, and with tree taxa such as the Arecaceae (palm trees), evidencing the local development of a fringe vegetation. These two phases were interpreted as a change from drier to wetter settings, largely in agreement with regional lake and speleothem records, as well as pollen and carbon isotope studies from other locations in central South America during the latest Holocene. Given that salinas are non-floodable and pollen was found to be well preserved, we highlight the potential of palaeopalynology in these environments as a source of palaeoecological information for the Pantanal Basin. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-11-01 2018-12-11T16:50:38Z 2018-12-11T16:50:38Z |
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 |
http://dx.doi.org/10.1080/01916122.2017.1386843 Palynology, p. 1-9. 0191-6122 http://hdl.handle.net/11449/170399 10.1080/01916122.2017.1386843 2-s2.0-85034634986 2-s2.0-85034634986.pdf |
url |
http://dx.doi.org/10.1080/01916122.2017.1386843 http://hdl.handle.net/11449/170399 |
identifier_str_mv |
Palynology, p. 1-9. 0191-6122 10.1080/01916122.2017.1386843 2-s2.0-85034634986 2-s2.0-85034634986.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Palynology 0,590 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-9 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964671255511040 |