Gaps critical for the survival of exposed seeds during Cerrado fires
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1071/BT17098 http://hdl.handle.net/11449/170894 |
Resumo: | The fine-scale effects of fire and the consequences for seed survival are poorly understood, especially in the Cerrado (Brazilian savannas). Thus, we investigated whether vegetation gaps (bare soil patches) influence the survival of exposed seeds during fire events in the Cerrado by serving as safe sites. We performed field fire experiments in Central Brazil to examine how gap size (% of bare soil) influences fire heat (fire temperatures and residence time) and seed survival (Experiment 1) and to determine how seed survival is affected by fixed conditions: gaps vs grass tussocks during fires (Experiment 2). We used seeds of two common Cerrado legumes, Mimosa leiocephala Benth. and Harpalyce brasiliana Benth. Seed survival was analysed using GLMMs with a binomial distribution. In Experiment 1, seeds survived (38 and 35% for M. leiocephala and H. brasiliana respectively) only when the gaps had >40% of bare soil. In Experiment 2, all seeds under grass tussocks died when exposed to fire, whereas up to 40% of seeds survived in vegetation gaps, relative to their respective controls. Because vegetation gaps influence fire heat, they are important as safe sites for seed survival in the Cerrado, allowing a significant proportion of seeds to survive when exposed at the soil surface. |
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Gaps critical for the survival of exposed seeds during Cerrado firesFabaceaefire ecologyLeguminosaeregenerationsavanna ecologyseed ecologyThe fine-scale effects of fire and the consequences for seed survival are poorly understood, especially in the Cerrado (Brazilian savannas). Thus, we investigated whether vegetation gaps (bare soil patches) influence the survival of exposed seeds during fire events in the Cerrado by serving as safe sites. We performed field fire experiments in Central Brazil to examine how gap size (% of bare soil) influences fire heat (fire temperatures and residence time) and seed survival (Experiment 1) and to determine how seed survival is affected by fixed conditions: gaps vs grass tussocks during fires (Experiment 2). We used seeds of two common Cerrado legumes, Mimosa leiocephala Benth. and Harpalyce brasiliana Benth. Seed survival was analysed using GLMMs with a binomial distribution. In Experiment 1, seeds survived (38 and 35% for M. leiocephala and H. brasiliana respectively) only when the gaps had >40% of bare soil. In Experiment 2, all seeds under grass tussocks died when exposed to fire, whereas up to 40% of seeds survived in vegetation gaps, relative to their respective controls. Because vegetation gaps influence fire heat, they are important as safe sites for seed survival in the Cerrado, allowing a significant proportion of seeds to survive when exposed at the soil surface.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista (UNESP) Instituto de Biociências Departamento de Botânica, Av. 24-A 1515Universidade Federal de Minas Gerais (UFMG) Instituto de Ciências Biológicas Departamento de Botânica, CP 486Universidade Estadual Paulista (UNESP) Instituto de Biociências Departamento de Botânica, Av. 24-A 1515FAPESP: 2015/06743-0CNPq: 455183/2014-7CNPq: 476334/2011-0Universidade Estadual Paulista (Unesp)Universidade Federal de Minas Gerais (UFMG)Daibes, L. Felipe [UNESP]Gorgone-Barbosa, Elizabeth [UNESP]Silveira, Fernando A. O.Fidelis, Alessandra [UNESP]2018-12-11T16:52:49Z2018-12-11T16:52:49Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article116-123http://dx.doi.org/10.1071/BT17098Australian Journal of Botany, v. 66, n. 2, p. 116-123, 2018.1444-98620067-1924http://hdl.handle.net/11449/17089410.1071/BT170982-s2.0-85045388410Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAustralian Journal of Botany0,393info:eu-repo/semantics/openAccess2021-10-23T15:25:11Zoai:repositorio.unesp.br:11449/170894Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:47:03.539930Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Gaps critical for the survival of exposed seeds during Cerrado fires |
title |
Gaps critical for the survival of exposed seeds during Cerrado fires |
spellingShingle |
Gaps critical for the survival of exposed seeds during Cerrado fires Daibes, L. Felipe [UNESP] Fabaceae fire ecology Leguminosae regeneration savanna ecology seed ecology |
title_short |
Gaps critical for the survival of exposed seeds during Cerrado fires |
title_full |
Gaps critical for the survival of exposed seeds during Cerrado fires |
title_fullStr |
Gaps critical for the survival of exposed seeds during Cerrado fires |
title_full_unstemmed |
Gaps critical for the survival of exposed seeds during Cerrado fires |
title_sort |
Gaps critical for the survival of exposed seeds during Cerrado fires |
author |
Daibes, L. Felipe [UNESP] |
author_facet |
Daibes, L. Felipe [UNESP] Gorgone-Barbosa, Elizabeth [UNESP] Silveira, Fernando A. O. Fidelis, Alessandra [UNESP] |
author_role |
author |
author2 |
Gorgone-Barbosa, Elizabeth [UNESP] Silveira, Fernando A. O. Fidelis, Alessandra [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Minas Gerais (UFMG) |
dc.contributor.author.fl_str_mv |
Daibes, L. Felipe [UNESP] Gorgone-Barbosa, Elizabeth [UNESP] Silveira, Fernando A. O. Fidelis, Alessandra [UNESP] |
dc.subject.por.fl_str_mv |
Fabaceae fire ecology Leguminosae regeneration savanna ecology seed ecology |
topic |
Fabaceae fire ecology Leguminosae regeneration savanna ecology seed ecology |
description |
The fine-scale effects of fire and the consequences for seed survival are poorly understood, especially in the Cerrado (Brazilian savannas). Thus, we investigated whether vegetation gaps (bare soil patches) influence the survival of exposed seeds during fire events in the Cerrado by serving as safe sites. We performed field fire experiments in Central Brazil to examine how gap size (% of bare soil) influences fire heat (fire temperatures and residence time) and seed survival (Experiment 1) and to determine how seed survival is affected by fixed conditions: gaps vs grass tussocks during fires (Experiment 2). We used seeds of two common Cerrado legumes, Mimosa leiocephala Benth. and Harpalyce brasiliana Benth. Seed survival was analysed using GLMMs with a binomial distribution. In Experiment 1, seeds survived (38 and 35% for M. leiocephala and H. brasiliana respectively) only when the gaps had >40% of bare soil. In Experiment 2, all seeds under grass tussocks died when exposed to fire, whereas up to 40% of seeds survived in vegetation gaps, relative to their respective controls. Because vegetation gaps influence fire heat, they are important as safe sites for seed survival in the Cerrado, allowing a significant proportion of seeds to survive when exposed at the soil surface. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:52:49Z 2018-12-11T16:52:49Z 2018-01-01 |
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/10.1071/BT17098 Australian Journal of Botany, v. 66, n. 2, p. 116-123, 2018. 1444-9862 0067-1924 http://hdl.handle.net/11449/170894 10.1071/BT17098 2-s2.0-85045388410 |
url |
http://dx.doi.org/10.1071/BT17098 http://hdl.handle.net/11449/170894 |
identifier_str_mv |
Australian Journal of Botany, v. 66, n. 2, p. 116-123, 2018. 1444-9862 0067-1924 10.1071/BT17098 2-s2.0-85045388410 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Australian Journal of Botany 0,393 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
116-123 |
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_ |
1808129461751644160 |