The effect of fire on seed germination of campo rupestre species in the South American Cerrado

Fernandes, Alessandra F.; Oki, Yumi; Fernandes, Geraldo Wilson; Moreira, Bruno

doi:10.1007/s11258-020-01086-1

Cited by 24 publications

(15 citation statements)

References 64 publications

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“…Over 90% of the mature individuals of the species were affected, with very few individuals remaining in the undisturbed area. Resprouting could occur by individuals less affected by the fire, as well as recruitment from the soil seed bank in areas where the fire was less intense and did not consume the soil peat layer (Fernandes et al 2021). Fire can also be a facilitator for the expansion of alien grass species (D'Antonio & Vitousek 1992), such as Melinis minutiflora P.Beauv., which was previously identified as a threat to the native species of Serra do Padre Ângelo (Gonella et al 2015).…”

Section: Methodsmentioning

confidence: 99%

Novelties in Lepidaploinae (Asteraceae, Vernonieae) from the easternmost campos rupestres of Minas Gerais, Brazil: two new species and a range expansion

Antar¹,

Siniscalchi²,

Gonella³

et al. 2021

Pl. Ecol. Evol.

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Background – Recent collection efforts in Serra do Padre Ângelo, Pico da Aliança, and Sete Salões State Park, all located in the state of Minas Gerais, have uncovered many botanical and zoological novelties. The region is an outlying campos rupestres area inserted in the Atlantic Forest phytogeographic domain, with its flora mostly related to that of the core campos rupestres area in the Espinhaço Range. Three species of Asteraceae, one of the most representative families in the campos rupestres, have been recently described for the area. Here we report two new species from the genera Lepidaploa and Lessingianthus and one range extension in Lessingianthus, both from subtribe Lepidaploinae.Methods – This study was based on specimens from the herbaria HUFU, MBML, SPF, UFP, and on field observations. Morphological observations and measures were taken following standard practices. Preliminary conservation assessments are based on field observations and spatial analyses (i.e. extent of occurrence, area of occupancy), following IUCN guidelines and criteria.Results – Two new species are described: Lepidaploa campirupestris, related to Lepidaploa aurea, differing from the latter by leaf indumentum, pedunculate heads, and number of florets; and Lessingianthus petraeus, related to Lessingianthus adenophyllus, but differing by leaf position and leaf blade morphology. We also report a range extension for Lessingianthus squamosus, previously known only for the state of Espírito Santo, ca 200 km away. Our results shed light on the interesting biogeography of the region, which mostly contains components of other campos rupestres areas intermixed with typical inselberg vegetation. It also highlights the importance of compiling floristic inventories in poorly collected localities and the need for conservation strategies for this biodiverse region.

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Section: Methodsmentioning

confidence: 99%

Novelties in Lepidaploinae (Asteraceae, Vernonieae) from the easternmost campos rupestres of Minas Gerais, Brazil: two new species and a range expansion

Antar¹,

Siniscalchi²,

Gonella³

et al. 2021

Pl. Ecol. Evol.

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“…Open circle = no‐smoke control; filled circle = smoke pretreatment; open square = no‐heat control; filled square = fire‐type heat pretreatment. Collated from 293 tests undertaken in 12 studies (Jeffery et al ., 1988; Crosti et al ., 2006; Travlos, Economou & Karamanos, 2007; Reyes & Trabaud, 2009; Tavşanoğlu, 2011; Chou, Cox & Wester, 2012; Ribeiro, Pedrosa & Borghetti, 2013; Galindez et al ., 2016; Paredes et al ., 2018; López‐Mársico et al ., 2019; Fernandes et al ., 2020; Gorgone‐Barbosa et al ., 2020). Inset: the best‐fit curves with 95% confidence intervals (GAM, P < 0.0001; untransformed data).…”

Section: Selective Environmentsmentioning

confidence: 99%

Fire‐released seed dormancy ‐ a global synthesis

Pausas

Lamont

2022

Biological Reviews

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Seed dormancy varies greatly between species, clades, communities, and regions. We propose that fireprone ecosystems create ideal conditions for the selection of seed dormancy as fire provides a mechanism for dormancy release and postfire conditions are optimal for germination. Thus, fire-released seed dormancy should vary in type and abundance under different fire regimes. To test these predictions, we compiled data from a wide range of fire-related germination experiments for species in different ecosystems across the globe. We identified four dormancy syndromes: heat-released (physical) dormancy, smoke-released (physiological) dormancy, non-fire-released dormancy, and non-dormancy. In fireprone ecosystems, fire, in the form of heat and/or chemical by-products (collectively termed 'smoke'), are the predominant stimuli for dormancy release and subsequent germination, with climate (cold or warm stratification) and light sometimes playing important secondary roles. Fire (heat or smoke)-released dormancy is best expressed where woody vegetation is dense and fires are intense, i.e. in crown-fire ecosystems. In such environments, seed dormancy allows shade-intolerant species to take advantage of vegetation gaps created by fire and synchronize germination with optimal recruitment conditions. In grassy fireprone ecosystems (e.g. savannas), where fires are less intense but more frequent, seed dormancy is less common and dormancy release is often not directly related to fire (non-fire-released dormancy). Rates of germination, whether controls or postfire, are twice as fast in savannas than in mediterranean ecosystems. Fire-released dormancy is rare to absent in arid ecosystems and rainforests. The seeds of many species with fire-released dormancy also possess elaiosomes that promote ant dispersal. Burial by ants increases insulation of seeds from fires and places them in a suitable location for fire-released dormancy. The distribution of these dormancy syndromes across seed plants is not randomcertain dormancy types are associated with particular lineages (phylogenetic conservatism). Heat-released dormancy can be traced back to fireprone floras in the 'fiery' mid-Cretaceous, followed by smoke-released dormancy, with loss of fire-related dormancy among recent events associated with the advent of open savannas and non-fireprone habitats. Anthropogenic influences are now modifying dormancy-release mechanisms, usually decreasing the role of fire as exaptive effects. We conclude that contrasting fire regimes are a key driver of the evolution and maintenance of diverse seed dormancy types in many of the world's natural ecosystems.

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“…Plant-derived smoke has been demonstrated to act as a germination cue in a large number of species [8,18,32]. The germination stimulants in smoke, such as karrikinolide (KAR 1 ) and glyceronitrile (SP 1 ), are responsible for promoting seed germination in some plants from fire-prone or non-fire-prone ecosystems [15,16,33].…”

Section: Discussionmentioning

confidence: 99%

“…Fire can affect seed dispersal, germination, seedling establishment, flowering, and other stages of plant growth and development [7]. Seed germination is an important life-history stage, and it is also the main route for vegetation restoration following fire [8]. The immediately post-fire habitat is an advantageous environment for seed germination and seedling establishment, with low competition and high available resources [9].…”

Section: Introductionmentioning

confidence: 99%

Fire-Related Cues Significantly Promote Seed Germination of Some Salt-Tolerant Species from Non-Fire-Prone Saline-Alkaline Grasslands in Northeast China

Ooi

2021

Plants

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Seed germination in response to fire-related cues has been widely studied in species from fire-prone ecosystems. However, the germination characteristics of species from non-fire-prone ecosystems, such as the saline-alkaline grassland, where fire occasionally occurs accidentally or is used as a management tool, have been less studied. Here, we investigate the effects of different types of fire cues (i.e., heat and smoke water) and their combined effect on the seed germination of 12 species from the saline-alkaline grassland. The results demonstrated that heat shock significantly increased the germination percentage of Suaeda glauca and Kochia scoparia var. sieversiana seeds. Smoke water significantly increased the germination percentage of Setaria viridis and K. scoparia seeds. However, compared with single fire cue treatments, the combined treatment neither promoted nor inhibited seed germination significantly in most species. These results suggest that fire cues can be used as germination enhancement tools for vegetation restoration and biodiversity protection of the saline-alkaline grassland.

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The effect of fire on seed germination of campo rupestre species in the South American Cerrado

Cited by 24 publications

References 64 publications

Novelties in Lepidaploinae (Asteraceae, Vernonieae) from the easternmost campos rupestres of Minas Gerais, Brazil: two new species and a range expansion

Novelties in Lepidaploinae (Asteraceae, Vernonieae) from the easternmost campos rupestres of Minas Gerais, Brazil: two new species and a range expansion

Fire‐released seed dormancy ‐ a global synthesis

Fire-Related Cues Significantly Promote Seed Germination of Some Salt-Tolerant Species from Non-Fire-Prone Saline-Alkaline Grasslands in Northeast China

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