Post-fire phenology in a campo sujo vegetation in the Urucum plateau, Mato Grosso do Sul, Brazil

Neves, Danilo M.; Damasceno-Junior, Ga.

doi:10.1590/s1519-69842011000500009

Cited by 27 publications

(15 citation statements)

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“…Fire-stimulated flowering and reproduction have often been observed for subshrubs and herbaceous species in the cerrado (Munhoz and Felfili, 2005;2007;Neves and Damasceno-Junior, 2011), but fire effects on woody plants vary from inhibition to stimulation of reproduction (Hoffmann, 1998;Felfili, et al 1999;Franceschinelli and Bawa, 2005;Lucena et al, 2015). Our results corroborate this variation in the fire responses for woody species, which cannot be explained by factors such as growth form (Lamont and Downes, 2011), leaf deciduousness (Lucena et al, 2015), or seed dispersal syndromes (Lamont and Downes, 2011).…”

Section: Discussionsupporting

confidence: 81%

Effects of an accidental dry-season fire on the reproductive phenology of two Neotropical savanna shrubs

2017

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Fire is a recurrent disturbance in savanna vegetation and savanna species are adapted to it. Even so, fire may affect various aspects of plant ecology, including phenology. We studied the effects of a spatially heterogeneous fire on the reproductive phenology of two dominant woody plant species, Miconia albicans (Melastomataceae) and Schefflera vinosa (Araliaceae), in a savanna area in South-eastern Brazil. The study site was partially burnt by a dry-season accidental fire in August 2006, and we monitored the phenolology of 30 burnt and 30 unburnt individuals of each species between September 2007 and September 2008. We used restricted randomizations to assess phenological differences between the burnt and unburnt individuals. Fire had negative effects on the phenology of M. albicans, with a smaller production of reproductive structures in general and of floral buds, total fruits, and ripe fruits in burnt plants. All unburnt but only 16% of the burnt M. albicans plants produced ripe fruits during the study. Fire effects on S. vinosa were smaller, but there was a greater production of floral buds and fruits (but not ripe fruits) by burnt plants; approximately 90% of the individuals of S. vinosa produced ripe fruits during the study, regardless of having been burnt or not. The differences between the two species may be related to S. vinosa's faster growth and absence from the seed bank at the study site, whereas M. albicans grows more slowly and is dominant in the seed bank. Keywords

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Section: Discussionsupporting

confidence: 81%

Effects of an accidental dry-season fire on the reproductive phenology of two Neotropical savanna shrubs

2017

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“…In general, nectar, pollen, and oil availability were not uniformly distributed throughout the year and this is consistent with other cerrado areas (Munhoz and Felfili 2007;Neves and Damasceno-Junior 2011), whereas fleshy fruits were uniformly available throughout the year even in the post-fire scenario, which is similar to the fruiting phenology of zoochorous species in other savanna areas (Munhoz and Felfili 2007). Our results highlight that fire does not filter species offering one specific resource to the detriment of others, and also emphasize that post-fire resource fluctuations in a community are complex.…”

Section: Discussionsupporting

confidence: 86%

Does fire affect the temporal pattern of trophic resource supply to pollinators and seed-dispersing frugivores in a Brazilian savanna community?

et al. 2016

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In tropical savannas, such as the campo cerrado in Brazil, fire plays an important role, affecting plant species' life history. Since fire has the potential to modify the structure of savanna communities as a whole, it is expected that it may influence the resource supply for mutualists by altering the pattern of investment in sexual reproduction. We used an experimental approach to test if fire alters trophic resource availability to pollinators (nectar, pollen, and oil) and seed-dispersing frugivores (fleshy fruits) by altering the seasonality of reproductive phenophases in a savanna community. We sampled all individuals of 60 species that were common to both control and experimental fire treatments. Each month we recorded the number of reproductive individuals to test whether fire affected the temporal resource offered by the plant assemblage as a whole, and by each specific plant group supporting distinct groups of pollinators and seed-dispersing frugivores. We noticed that fire advanced the nectar, pollen, and fleshy fruit offered by the whole assemblage. Additionally, fire affected the temporal pattern of nectar and pollen available to various pollinator groups, and of fleshy fruits available to all seed-dispersing frugivores. In general, fire seems to have a neutral or even a positive effect on resource availability to mutualists. Nevertheless, there were differences in the availability of the resource utilized by each guild of mutualists. Keywords Cerrado Á Fire Á Flowering Á Fruiting Á Mutualism Á Phenology Communicated by Michael Lawes.

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“…O fogo também se apresenta como importante fator que modula a estrutura da vegetação (LOPES et al, 2009) e a periodicidade das fenofases (BULHÃO; FIGUEIREDO, 2002;DAMASCENO-JUNIOR, 2011;ALVARADO et al, 2014) e atua sazonalmente sobre as populações vegetais (MEDINA; SILVA, 1990;HOFFMANN, 1996;HOFFMANN, 1998;HOFFMANN, 1999;MOREIRA, 2000). Além disso, provoca comportamentos fenológicos divergentes aos padrões comumente descritos para espécies lenhosas com diferentes graus de deciduidade (BULHÃO; FIGUEIREDO, 2002).…”

Section: Introductionunclassified

A Deciduidade Foliar Indica a Vulnerabilidade De Espécies Lenhosas Ao Fogo

2015

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RESUMO -Pesquisas indicaram que a ocorrência de queimadas pode ocasionar comportamentos fenológicos divergentes aos padrões comumente descritos. Este estudo teve como objetivo avaliar se a deciduidade foliar pode indicar a vulnerabilidade de espécies lenhosas ao fogo. Os índices de atividade e intensidade de diferentes fenofases foram comparados entre indivíduos queimados e não queimados de espécies lenhosas com diferentes graus de deciduidade foliar (decídua, semidecídua e sempre-verde). Para a espécie decídua, as fenofases vegetativas foram similares entre indivíduos queimados e não queimados. Indivíduos queimados de uma espécie semidecídua apresentaram maior intensidade e atividade das fenofases vegetativas. Para as espécies sempre-verdes, foi registrado o estímulo à produção de novas folhas, retardamento de folhas expandidas e senescentes para indvíduos queimados. Quanto à fenologia reprodutiva, em indivíduos queimados, foram registradas menor intensidade e atividade de frutos verdes e maduros para espécies decídua e semidecídua, bem como o estímulo da floração e da frutificação para as espécies sempre-verdes. A periodicidade das fenofases pode ser modulada pela ocorrência do fogo mesmo após um intervalo de dois anos. O efeito do fogo foi gradualmente mais pronunciado de espécies decíduas às sempre-verdes, o que indica maior vulnerabilidade de espécies lenhosas sempre-verdes a esse distúrbio.Palavras-chave: Fenologia reprodutiva; Fenologia vegetativa; Distúrbio ambiental. LEAF FALL INDICATES VULNERABILITY OF WOODY SPECIES TO FIRE ABSTRACT -Studies demonstrated that the occurrence of fires may cause phenological behaviours that diverge from commonly described patterns. The aim of this study was to evaluate whether the vulnerability of woody species to fire can be indicated by leaf deciduousness. The activity index and the intensity index of different phenophases were compared between burned and unburned individuals of woody species with different levels of leaf deciduousness (deciduous, semideciduous and evergreen). For the deciduous species

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Post-fire phenology in a campo sujo vegetation in the Urucum plateau, Mato Grosso do Sul, Brazil

Cited by 27 publications

References 14 publications

Effects of an accidental dry-season fire on the reproductive phenology of two Neotropical savanna shrubs

Effects of an accidental dry-season fire on the reproductive phenology of two Neotropical savanna shrubs

Does fire affect the temporal pattern of trophic resource supply to pollinators and seed-dispersing frugivores in a Brazilian savanna community?

A Deciduidade Foliar Indica a Vulnerabilidade De Espécies Lenhosas Ao Fogo

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