Fire cues and germination of invasive and native grasses in the Cerrado
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0102-33062019abb0337 http://hdl.handle.net/11449/196718 |
Resumo: | Fire-related cues may enhance seed recruitment in flammable ecosystems and differences in fire-germination responses of invasive vs. native species can drive the invasion process. We evaluated the effects of heat shock and smoke water solution treatment on seed germination of invasive (Melinis minutiflora, Urochloa decumbens, U. brizantha) and native grasses (Axonopus pressus, Aristida setifolia, Gymnopogon foliosus) of the Cerrado. The effect of fire temperature was tested by exposing seeds to heat shock treatments of 60, 100, and 200 degrees C for one minute, comparing them to untreated seeds. The effect of smoke was tested by soaking seeds for 24-h in an aqueous smoke comparing them to seeds soaked in distilled water. Differences among treatments were evaluated by ANOVA and randomization tests. None of the tested species had germination stimulated by the temperature or smoke. Both species of Urochloa experienced decreased viability with increasing temperature, while seeds of native species and M. minutiflora tolerated heat shock up to 200 degrees C. The invasive grasses usually germinated faster than the native grasses. Germination time is therefore a crucial trait driving the invasion process, irrespective of fire-related cues. Other seed traits (e.g. dormancy) and higher resprouting capacity may help invasive species to persist in frequently burned savannas. |
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Fire cues and germination of invasive and native grasses in the CerradoAfrican grassesCerrado grassesfire temperatureMelinis minutiflorasmoke solutionUrochloa brizanthaUrochloa decumbensFire-related cues may enhance seed recruitment in flammable ecosystems and differences in fire-germination responses of invasive vs. native species can drive the invasion process. We evaluated the effects of heat shock and smoke water solution treatment on seed germination of invasive (Melinis minutiflora, Urochloa decumbens, U. brizantha) and native grasses (Axonopus pressus, Aristida setifolia, Gymnopogon foliosus) of the Cerrado. The effect of fire temperature was tested by exposing seeds to heat shock treatments of 60, 100, and 200 degrees C for one minute, comparing them to untreated seeds. The effect of smoke was tested by soaking seeds for 24-h in an aqueous smoke comparing them to seeds soaked in distilled water. Differences among treatments were evaluated by ANOVA and randomization tests. None of the tested species had germination stimulated by the temperature or smoke. Both species of Urochloa experienced decreased viability with increasing temperature, while seeds of native species and M. minutiflora tolerated heat shock up to 200 degrees C. The invasive grasses usually germinated faster than the native grasses. Germination time is therefore a crucial trait driving the invasion process, irrespective of fire-related cues. Other seed traits (e.g. dormancy) and higher resprouting capacity may help invasive species to persist in frequently burned savannas.Fundacao Grupo Boticario de Protecao a NaturezaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Paulista, Inst Biociencias, Lab Ecol Vegetacao, BR-13506900 Rio Claro, SP, BrazilUniv Sao Paulo, Inst Biociencias, Dept Ecol, BR-05508090 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Biociencias, Lab Ecol Vegetacao, BR-13506900 Rio Claro, SP, BrazilFundacao Grupo Boticario de Protecao a Natureza: 0153_2011_PRFundacao Grupo Boticario de Protecao a Natureza: 0106_ 2011_PRCNPq: 476334/2011-0CNPq: 455183/2014-7FAPESP: 2015/06743-0CNPq: 305253/2015-8CNPq: 306170/2015-9Soc Botanica BrasilUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Gorgone-Barbosa, Elizabeth [UNESP]Daibes, Luis Felipe [UNESP]Novaes, Rafael B. [UNESP]Pivello, Vania ReginaFidelis, Alessandra [UNESP]2020-12-10T19:54:01Z2020-12-10T19:54:01Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article185-191application/pdfhttp://dx.doi.org/10.1590/0102-33062019abb0337Acta Botanica Brasilica. Sao Paulo Sp: Soc Botanica Brasil, v. 34, n. 1, p. 185-191, 2020.0102-3306http://hdl.handle.net/11449/19671810.1590/0102-33062019abb0337S0102-33062020000100185WOS:000521733100018S0102-33062020000100185.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengActa Botanica Brasilicainfo:eu-repo/semantics/openAccess2023-11-07T06:16:25Zoai:repositorio.unesp.br:11449/196718Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:07:26.544216Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fire cues and germination of invasive and native grasses in the Cerrado |
title |
Fire cues and germination of invasive and native grasses in the Cerrado |
spellingShingle |
Fire cues and germination of invasive and native grasses in the Cerrado Gorgone-Barbosa, Elizabeth [UNESP] African grasses Cerrado grasses fire temperature Melinis minutiflora smoke solution Urochloa brizantha Urochloa decumbens |
title_short |
Fire cues and germination of invasive and native grasses in the Cerrado |
title_full |
Fire cues and germination of invasive and native grasses in the Cerrado |
title_fullStr |
Fire cues and germination of invasive and native grasses in the Cerrado |
title_full_unstemmed |
Fire cues and germination of invasive and native grasses in the Cerrado |
title_sort |
Fire cues and germination of invasive and native grasses in the Cerrado |
author |
Gorgone-Barbosa, Elizabeth [UNESP] |
author_facet |
Gorgone-Barbosa, Elizabeth [UNESP] Daibes, Luis Felipe [UNESP] Novaes, Rafael B. [UNESP] Pivello, Vania Regina Fidelis, Alessandra [UNESP] |
author_role |
author |
author2 |
Daibes, Luis Felipe [UNESP] Novaes, Rafael B. [UNESP] Pivello, Vania Regina Fidelis, Alessandra [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Gorgone-Barbosa, Elizabeth [UNESP] Daibes, Luis Felipe [UNESP] Novaes, Rafael B. [UNESP] Pivello, Vania Regina Fidelis, Alessandra [UNESP] |
dc.subject.por.fl_str_mv |
African grasses Cerrado grasses fire temperature Melinis minutiflora smoke solution Urochloa brizantha Urochloa decumbens |
topic |
African grasses Cerrado grasses fire temperature Melinis minutiflora smoke solution Urochloa brizantha Urochloa decumbens |
description |
Fire-related cues may enhance seed recruitment in flammable ecosystems and differences in fire-germination responses of invasive vs. native species can drive the invasion process. We evaluated the effects of heat shock and smoke water solution treatment on seed germination of invasive (Melinis minutiflora, Urochloa decumbens, U. brizantha) and native grasses (Axonopus pressus, Aristida setifolia, Gymnopogon foliosus) of the Cerrado. The effect of fire temperature was tested by exposing seeds to heat shock treatments of 60, 100, and 200 degrees C for one minute, comparing them to untreated seeds. The effect of smoke was tested by soaking seeds for 24-h in an aqueous smoke comparing them to seeds soaked in distilled water. Differences among treatments were evaluated by ANOVA and randomization tests. None of the tested species had germination stimulated by the temperature or smoke. Both species of Urochloa experienced decreased viability with increasing temperature, while seeds of native species and M. minutiflora tolerated heat shock up to 200 degrees C. The invasive grasses usually germinated faster than the native grasses. Germination time is therefore a crucial trait driving the invasion process, irrespective of fire-related cues. Other seed traits (e.g. dormancy) and higher resprouting capacity may help invasive species to persist in frequently burned savannas. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T19:54:01Z 2020-12-10T19:54:01Z 2020-01-01 |
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/10.1590/0102-33062019abb0337 Acta Botanica Brasilica. Sao Paulo Sp: Soc Botanica Brasil, v. 34, n. 1, p. 185-191, 2020. 0102-3306 http://hdl.handle.net/11449/196718 10.1590/0102-33062019abb0337 S0102-33062020000100185 WOS:000521733100018 S0102-33062020000100185.pdf |
url |
http://dx.doi.org/10.1590/0102-33062019abb0337 http://hdl.handle.net/11449/196718 |
identifier_str_mv |
Acta Botanica Brasilica. Sao Paulo Sp: Soc Botanica Brasil, v. 34, n. 1, p. 185-191, 2020. 0102-3306 10.1590/0102-33062019abb0337 S0102-33062020000100185 WOS:000521733100018 S0102-33062020000100185.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Acta Botanica Brasilica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
185-191 application/pdf |
dc.publisher.none.fl_str_mv |
Soc Botanica Brasil |
publisher.none.fl_str_mv |
Soc Botanica Brasil |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1808128758356377600 |