From ashes to flowers: a savanna sedge initiates flowers 24 h after fire

Fidelis, Alessandra; Rosalem, Patrícia Fernanda; Zanzarini, Vagner; Camargos, Liliane Santos de; Martins, Aline Redondo

doi:10.1002/ecy.2648

Cited by 29 publications

(30 citation statements)

References 12 publications

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“…In sum, our results should be viewed as supportive of the growing recognition that fire is of fundamental importance to the conservation and restoration of savannas in Brazilian Cerrado (Durigan & Ratter, 2016;Fidelis et al, 2019;Maravalhas & Vasconcelos, 2014;Ramos-Neto & Pivello, 2000;Schmidt et al, 2018;Zanzarini et al, 2019).…”

Section: Discussionsupporting

confidence: 79%

“…In Brazilian Cerrado, savannas have higher rates of flowering (Pilon, Hoffmann, et al, 2018) and increase in native herbaceous biomass after fire (Oliveras et al, 2013). Although the mechanisms by which fire directly stimulates resprouting, flowering, and seed germination are still not clear (Buisson et al, 2019;Fidelis, Rosalem, Zanzarini, & Camargos, 2019), fire does indirectly stimulate herbaceous plants by increasing light availability and soil nutrients (Araújo, Amaral, Bruna, & Vasconcelos, 2013) and increases native species richness by reducing exotic grass cover (Martins, Hay, Scaléa, & Malaquias, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…In Brazilian Cerrado, savannas have higher rates of flowering (Pilon, Hoffmann, et al, 2018) and increase in native herbaceous biomass after fire (Oliveras et al., 2013). Although the mechanisms by which fire directly stimulates resprouting, flowering, and seed germination are still not clear (Buisson et al., 2019; Fidelis, Rosalem, Zanzarini, & Camargos, 2019), fire does indirectly stimulate herbaceous plants by increasing light availability and soil nutrients (Araújo, Amaral, Bruna, & Vasconcelos, 2013) and increases native species richness by reducing exotic grass cover (Martins, Hay, Scaléa, & Malaquias, 2017). In sum, our results should be viewed as supportive of the growing recognition that fire is of fundamental importance to the conservation and restoration of savannas in Brazilian Cerrado (Durigan & Ratter, 2016; Fidelis et al., 2019; Maravalhas & Vasconcelos, 2014; Ramos‐Neto & Pivello, 2000; Schmidt et al., 2018; Zanzarini et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

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Savannas after afforestation: Assessment of herbaceous community responses to wildfire versus native tree planting

Haddad¹,

Viani²,

Cava³

et al. 2020

Biotropica

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Afforestation and fire exclusion are pervasive threats to tropical savannas. In Brazil, laws limiting prescribed burning hinder the study of fire in the restoration of Cerrado plant communities. We took advantage of a 2017 wildfire to evaluate the potential for tree cutting and fire to promote the passive restoration of savanna herbaceous plant communities after destruction by exotic tree plantations. We sampled a burned pine plantation (Burned Plantation); a former plantation that was harvested and burned (Harvested & Burned); an unburned former plantation that was harvested, planted with native trees, and treated with herbicide to control invasive grasses (Native Tree Planting); and two old-growth savannas which served as reference communities. Our results confirm that herbaceous plant communities on post-afforestation sites are very different from old-growth savannas. Among post-afforestation sites, Harvested & Burned herbaceous communities were modestly more similar in composition to old-growth savannas, had slightly higher richness of savanna plants (3.8 species per 50-m 2), and supported the greatest cover of native herbaceous plants (56%). These positive trends in herbaceous community recovery would be missed in assessments of tree cover: whereas canopy cover in the Harvested & Burned site was 6% (less than typical of savannas of the Cerrado), the Burned Plantation and Native Tree Planting supported 34% and 19% cover, respectively. By focusing on savanna herbaceous plants, these results highlight that tree cutting and fire, not simply tree planting and fire exclusion, should receive greater attention in efforts to restore savannas of the Cerrado.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Savannas after afforestation: Assessment of herbaceous community responses to wildfire versus native tree planting

Haddad¹,

Viani²,

Cava³

et al. 2020

Biotropica

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“…Keywords: cerrado, conservation, fauna, fire impact, fire management, plant functional groups, prescribed burn INTRODUCTION Fire has been a natural process for hundreds of millions of years, controlling the spatial distribution of biomes and maintaining the structure and functioning of fire-prone ecosystems (Scott, 2000;Bond and Keeley, 2005), long before humans arose (Scott, 2000). Fire has therefore been a significant evolutionary force for species living in tropical grassy biomes (Simon et al, 2009;Keeley et al, 2011;Simon and Pennington, 2012), resulting in diverse adaptations and an overall dependence on fire in many cases Fidelis et al, 2019). Despite evidence that mesic savannas need fire to maintain their structure and biodiversity (Bond and Parr, 2010;Andersen et al, 2012;Abreu et al, 2017;Rosan et al, 2019), prescribing fire is still controversial in many areas (Driscoll et al, 2010;Fidelis and Pivello, 2011;Pivello, 2017).…”

mentioning

confidence: 99%

No Net Loss of Species Diversity After Prescribed Fires in the Brazilian Savanna

Durigan

Pilon

Abreu

et al. 2020

Front. For. Glob. Change

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Although savannas are fire-adapted ecosystems, prescribing fire for biodiversity conservation remains controversial at least in some regions where savannas occur. Faced with uncertainty, many decision makers and even scientists are still reluctant to prescribe fire for conservation purposes in fire-prone ecosystems, invoking the precautionary principle. Knowledge gaps on the ideal fire regime, such as how and when to burn, and especially the fear of biodiversity losses, are among the main arguments against fire management applied to remnants of native savanna vegetation. To inform this debate, we assessed the impact of prescribed fires on diversity of plants (different growth forms), ants, frogs, lizards, birds, and small mammals, in savannas and grasslands of the Brazilian Cerrado. We assessed the existing species richness, composition, and abundance in areas subjected to long periods of fire suppression and compared to that observed over a short period after prescribed dry-season fires, within each group of plants and animals. Whenever possible, we carried out separate analyses for grassland and savanna. Burning did not significantly reduce species richness of any of the groups analyzed, but had a positive effect on richness of graminoids in grassland. When analyzed at the species level, abundance of most animal groups did not show consistent responses to fire, except for a decrease in some frog populations in grasslands. Forbs, graminoids, and subshrubs increased in abundance after fire in grassland areas, though in savanna areas, abundance of forbs, and subshrubs tended to decline after fire. Species composition changed little in response to fire as indicated by low levels of dissimilarity between burned and unburned areas. These results confirm the high resilience of Cerrado biota to fire, as expected for savanna ecosystems in general. Besides, we demonstrate here that the risk of biodiversity losses cannot justify the objections to the use of prescribed fire for conservation purposes in the Cerrado.

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“…In a reproductive approach, Pilon et al [200] reported a similar pattern, with fire triggering the production of flowers and fruits in 79% of 47 plant species such as grasses, forbs, and subshrubs. Moreover, several studies have reported flowering in several plant species after the passage of fire [201,202] and, more recently, Fidelis et al [203] reported massive [204].…”

Section: Fire As a Selective Agent For Plant Communitiesmentioning

confidence: 99%

Responses of Neotropical Savannah Plant Species to Abiotic Stresses: A Structural and Functional Overview

Castro¹,

Kuster²

2021

Abiotic Stress in Plants

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Plants under field conditions are subject to different types of abiotic stresses such as drought, salinity, and light excess that adversely affect their growth and survival. In addition, several studies have pointed out the effect of climate change such as an increase in the concentration of atmospheric CO 2 , as well as an increase in global temperature on the distribution and wealth of plants. Adaptation to abiotic stress and survival occurs on different scales, at the cellular level for each individual, and requires a range of strategies, whether morphological, physiological, molecular or structural. Such strategies may be determinant in the distribution of plant species in natural habitats, depending on ecological adaptations shaped by the evolutionary history of species. In this chapter, we discuss recent information about mechanisms of plant adaptation to abiotic stress in the Neotropical savannah based on the cell and individual scales.

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From ashes to flowers: a savanna sedge initiates flowers 24 h after fire

Cited by 29 publications

References 12 publications

Savannas after afforestation: Assessment of herbaceous community responses to wildfire versus native tree planting

Savannas after afforestation: Assessment of herbaceous community responses to wildfire versus native tree planting

No Net Loss of Species Diversity After Prescribed Fires in the Brazilian Savanna

Responses of Neotropical Savannah Plant Species to Abiotic Stresses: A Structural and Functional Overview

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