Post-fire recovery of savanna vegetation from rocky outcrops

Gomes, Letícia; Maracahipes, Leandro; Marimon, Beatriz Schwantes; Reis, Simone Matias; Elias, Fernando; Maracahipes‐Santos, Leonardo; Lenza, Eddie

doi:10.1016/j.flora.2014.02.006

Cited by 33 publications

(38 citation statements)

References 43 publications

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“…Inulin sphero-crystals were also distributed in the parenchyma cells of secondary vascular tissue in the xylopodium of D. vestitum. The location of fructans in vascular tissues as already documented for other species , the rapid polymerization and depolymerization process of such polysaccharides (Pollock 1986) and their adherence to cell walls, as in C. chlorolepis (Vilhalva et al 2011) provide evidences that fructans may play important roles in the adaptation of species to campos rupestres, as it has been proposed for other Cerrado physiognomies with fire occurrence (Gomes et al 2014) and unfavorable conditions of soil, water and temperature (Dias-Tagliacozzo et al 1999, Portes et al 2008). …”

Section: Discussionsupporting

confidence: 54%

“…This is probably due to the presence of several features in 806 TAIZA M. SILVA et al their shoots and underground organs that allow its resilience over seasonal drought and fire occurrence, environmental constraints typically found in rupestrian environments (Gomes et al 2014). One prominent feature of D. vestitum leaves is the pubescence, a structural property that influences reflectance and contributes to temperature reduction in leaves, especially in plants from arid and warm environments (Press 1999).…”

Section: Discussionmentioning

confidence: 99%

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Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Silva¹,

Vilhalva²,

Moraes³

et al. 2015

An. Acad. Bras. Ciênc.

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Among the compounds stored by plants, several functions are assigned to fructans, such as source of energy and protection against drought and extreme temperatures. In the present study we analyzed the anatomy and distribution of fructans in vegetative organs of Dimerostemma vestitum (Asteraceae), an endemic species from the Brazilian campos rupestres. D. vestitum has amphistomatic and pubescent leaves, with both glandular and non-glandular trichomes. In the basal aerial stem the medulla has two types of parenchyma, which differ from the apical portion. The xylopodium has mixed anatomical origin. Interestingly, although inulin-type fructans with high degree of polymerization were found in all analyzed organs except the leaves, the highest amount and maximum degree of polymerization were detected in the xylopodium. Inulin sphero-crystals were visualized under polarized light in the medulla and in the vascular tissues mainly in the central region of the xylopodium, which has abundant xylem parenchyma. Secretory structures accumulating several compounds but not inulin were identified within all the vegetative organs. The presence of these compounds, in addition to inulin, might be related to the strategies of plants to survive adverse conditions in a semi-arid region, affected seasonally by water restriction and frequently by fire.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Silva¹,

Vilhalva²,

Moraes³

et al. 2015

An. Acad. Bras. Ciênc.

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“…Overall changes in species richness in the Cerrado biome tend to be small and transitory (Felfili et al 2000;Aquino et al 2007), even in areas that have suffered some kind of disturbance, such as natural fire (Gomes et al 2014;Lopes et al 2009). In addition, these small changes were due to species that occur at low densities, where the death or recruitment of a small number of individuals may easily provoke a decrease or increase in species richness.…”

Section: Discussionmentioning

confidence: 99%

“…The CR plots were arranged perpendicularly to the predominant slope of the outcrop to control for possible variations in the topographic gradient, as suggested by Oliveira-Filho (1994). We measured the stem diameter of all live and dead trees with a diameter ≥ 3 cm at 30 cm height above ground level, following Gomes et al (2014). For taxonomic identification, we compared the botanical material collected in the field with voucher specimens in the collection of the NX Herbarium at Mato Grosso State University in Nova Xavantina.…”

Section: Data Collectionmentioning

confidence: 99%

“…t = time elapsed between surveys; N 0 = initial number of individuals; N t = final number of individuals; N m = number of dead individuals; N r = number of recruits; AB 0 = initial basal area; AB t = final basal area; AB m = basal area of dead individuals; AB r = basal area of recruits; ABd = decrease in basal area; ABg = increase in basal area; Ln = natural logarithm. Adapted with permission from Gomes et al (2014).…”

Section: Dynamic Parametersmentioning

confidence: 99%

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Dynamics of the woody vegetation of two areas of Cerrado sensu stricto located on different substrates

et al. 2016

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Differences in substrates can provoke distinct responses in the dynamics of a plant community. We compared changes the floristic, structural and dynamic parameters of the woody vegetation between burned sites dominated by cerrado típico (CT) and cerrado rupestre (CR), which is characterized by the presence of rocky outcrops, over time. We set up 10 plots (20 m × 50 m) at each site. All individuals (diameter of ≥ 3 cm at 30 cm height above the ground) were identified in the two censuses (2009 and 2012) and measured (stem diameter), after an accidental fire in 2008. Changes in floristic parameters between the CT and CR were not significant. However, we found significant differences (p < 0.05) in structural and dynamic parameters, such as density (CT = 1,523; CR = 2,171 ind.ha -1 ), basal area (CT = 8.70; CR = 13.00 m 2 .ha -1 ), recruitment rates (CT = 24.35; CR = 15.14% year -1 ; p = 0.01), gain (CT = 8.58; CR= 3.58% year -1 ), and the loss rates of basal area (CT = 3.88; CR= 2.45% year -1 ). These differences emphasize the need for a differential evaluation of these sites for the development of effective conservation strategies. Key words: changes, density, floristic, mortality, recruitment. ResumoA diferença de substrato pode causar respostas distintas sobre a dinâmica da comunidade vegetal. O objetivo deste trabalho foi comparar os parâmetros florístico, estruturais e de dinâmica da vegetação entre áreas queimadas de cerrado típico (CT) e cerrado rupestre (CR) (presença de afloramentos rochosos) ao longo do tempo. Foram estabelecidas 10 parcelas (20 m × 50 m) em cada local. Todos os indivíduos com diâmetro ≥ 3 cm a 30 cm de altura acima do solo foram identificados e mediu-se o diâmetro do caule tanto em 2009 quanto em 2012, depois de uma queima acidental em 2008. As mudanças nos parâmetros florísticos não foram significativas entre o CT e CR. Entretanto, foram encontradas diferenças (p < 0,05) principalmente com relação aos parâmetros estruturais e de dinâmica, como densidade (CT = 1.523; CR = 2.171 ind.ha -1 ), área basal (CT = 8,70; CR = 13,00 m 2 .ha -1 ), taxa de recrutamento (CT = 24,35; CR= 15,14% ano -1 ; p = 0,01), ganho (CT = 8,58; CR= 3,58% ano -1 ; p = 0,02) e perda em área basal (CT = 3,88; CR= 2,45% ano -1 ). Essas diferenças enfatizam a necessidade de avaliar de forma diferenciada essas fisionomias para criação de futuras estratégias de conservação. Palavras-chave: mudanças, densidade, florística, mortalidade, recrutamento.

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Tracking Changes in Vegetation Structure Following Fire in the Cerrado Biome using ICESat-2

Konduri

Morton

Andela

2022

Preprint

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Fires are an integral part in the Earth system, causing widespread changes in ecosystem structure and function, atmospheric chemistry, and climate (Bowman et al., 2009). Fire-induced changes in the horizontal and vertical structure of vegetation drive substantial shifts in ecosystem carbon storage, surface energy balance, and species' habitats (Frolking et al., 2009). Savannas and grasslands, which occupy about 20% of the land surface and store 15% of vegetation carbon stocks, account for more than 80% of the global annual burned area (Giglio et al., 2013). Fires have played an important role in the evolution of savannas and grasslands across the globe (Beerling & Osborne, 2006;Edwards et al., 2010;Van der Werf et al., 2010). Widespread changes in savanna fire regimes in response to human activity (Andela et al., 2017) and climate (Abatzoglou et al., 2019); therefore, have the potential to alter vegetation structure and carbon storage in savanna ecosystems.

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Post-fire recovery of savanna vegetation from rocky outcrops

Cited by 33 publications

References 43 publications

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Anatomy and fructan distribution in vegetative organs of Dimerostemma vestitum (Asteraceae) from the campos rupestres

Dynamics of the woody vegetation of two areas of Cerrado sensu stricto located on different substrates

Tracking Changes in Vegetation Structure Following Fire in the Cerrado Biome using ICESat-2

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