Quantifying the short-term flowering after fire in some plant communities of a cerrado grassland

Pilon, Natashi A. L.; Hoffmann, William A.; Abreu, Rodolfo Cesar Real de; Durigan, Giselda

doi:10.1080/17550874.2018.1517396

Cited by 49 publications

(64 citation statements)

References 52 publications

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“…These results suggest that increasing flowering postfire is quite general across vegetation types (Lamont & Downes, ). The high number of herbaceous species in fire‐prone environments with floral phenology synchronized by fire (Lamont & Downes, ; Pilon, Hoffmann, Abreu, & Durigan, ) can be quite attractive to pollinators, explaining the higher pollinator visitation to floral‐resource‐rich communities of recently burned sites (Mola & Williams, ; Swengel, ).…”

Section: Discussionmentioning

confidence: 99%

A global synthesis of fire effects on pollinators

Carbone

Tavella

Pausas

et al. 2019

Global Ecol Biogeogr

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Aim Understanding fire effects on pollinators is critical in the context of fire regime changes and the global pollination crisis. Through a systematic and quantitative review of the literature, we provide the first global assessment of pollinator responses to fire. We hypothesize that pollinators increase after fire and during the early postfire succession stages; however, high fire frequency has the opposite effect, decreasing pollinators. Location Terrestrial ecosystems, excluding Antarctica. Time period Data collected from 1973 to 2017. Major taxa studied Insects (Coleoptera, Diptera, Hymenoptera and Lepidoptera) and a few bird species. Methods We first compiled available studies across the globe that assessed fire effects on pollinator communities. Then, by means of hierarchical meta‐analyses, we evaluated how different fire regime parameters (fire frequency, postfire time and fire type) and habitat characteristics affect the abundance and richness of animals that act as pollinators. We also explored to what extent the responses vary among taxa groups and life history traits of pollinators (sociality system, nest location and feeding specialization), and among biomes. Results The overall effect size of fire on pollinator abundance and richness across all studies was positive. Fire effect was especially clear and significant in early postfire communities, after wildfires, and for Hymenoptera. Taxonomic resolution influenced fire effects, where only studies at the species/genus and family levels showed significant effects. The main exceptions were recurrent fires that showed a negative effect, and especially wildfire effects on Lepidoptera abundance that showed a significant negative response. Main conclusions Pollinators tend to be promoted after a wildfire event. However, short fire intervals may threat pollinators, and especially lepidopterans. Given the current fire regime changes at the global scale, it is imperative to monitor postfire pollinators across many ecosystems, as our results suggest that fire regime is critical in determining the dynamics of pollinator communities.

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Section: Discussionmentioning

confidence: 99%

A global synthesis of fire effects on pollinators

Carbone

Tavella

Pausas

et al. 2019

Global Ecol Biogeogr

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“…We found change in species richness, but only for graminoids in grassland areas, with colonization by new species triggered by fire. The arrival of 10 new species of grasses was likely favored by two fire effects: (i) intensifying sexual reproduction (Eiten, 1972;Coutinho, 1977Coutinho, , 1990Le Stradic et al, 2015;Pilon et al, 2018) and (ii) clearing the ground and thus favoring seed dispersal and germination (Coutinho, 1990;Fidelis et al, 2012), since both processes are constrained by the vast amount of biomass accumulated after a long period without fire. Studies on grasses and forbs of tropical savannas have shown that the effect of fire reducing woody biomass and cover is remarkably beneficial for the ground layer plant communities (Sheuyange et al, 2005;Zimmermann et al, 2010).…”

Section: Discussionmentioning

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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“…However, Silvério et al [199] reported that the negative effects of fire on the vegetative phenophases were normally followed by an increase in sprouting and the production of leaves, revealing an epigeous recovery mechanism from fire damage. 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: 89%

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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Quantifying the short-term flowering after fire in some plant communities of a cerrado grassland

Cited by 49 publications

References 52 publications

A global synthesis of fire effects on pollinators

A global synthesis of fire effects on pollinators

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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