Topsoil depth influences the recovery of rupestrian grasslands degraded by mining

Rezende, Lina Andrade Lobo de; Fernandes, Geraldo Wilson; Braga, Ramon de Paula; Dias, Luiz Eduardo; Gomes, Vanessa Matos

doi:10.36783/18069657rbcs20210056

Cited by 1 publication

(3 citation statements)

References 24 publications

(28 reference statements)

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“…However, transferring deeper topsoil samples in degraded cangas showed more promising results with restored areas recovering a considerable percentage of floristic and functional composition (Onésimo et al . 2021; Rezende et al . 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Second, soil samples –especially thicker ones– might contain a considerable amount of exotic and non-target species (Le Stradic et al . 2018; Rezende et al . 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, studies in the campo rupestre have shown impoverished soil seed banks (Medina and Fernandes 2007;Le Stradic et al 2018;Luz et al 2018), hence topsoil transfer (5 cm) has shown little use for ecological restoration (Le Stradic et al 2018). However, transferring deeper topsoil samples in degraded cangas showed more promising results with restored areas recovering a considerable percentage of floristic and functional composition (Onésimo et al 2021;Rezende et al 2021). However, this technique has two major limitations.…”

Section: Implications For Seed Banking and Seed-based Restorationmentioning

confidence: 99%

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Seed functional ecology in Brazilian rock outcrop vegetation: an integrative synthesis

Ordóñez‐Parra

Medeiros

Dayrell

et al. 2023

Preprint

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Background and Aims: Rock outcrop vegetation is distributed worldwide and hosts a diverse, specialised, and unique flora that evolved under extremely harsh environmental conditions. The germination ecology in such ecosystems has received little attention, especially regarding the association between seed traits, germination responses and adult plants ecology. Here, we provide a quantitative and meta–analytical review of the seed functional ecology of Brazilian rocky outcrop vegetation, focusing on four vegetation types:campo rupestre,canga,campo de altitudeand inselbergs. Methods: Using a database with functional trait data for 383 taxa and 10,187 germination records for 281 taxa, we calculated the phylogenetic signal of seven seed traits and tested whether they varied among growth forms, geographical distributions, and microhabitats. We also conducted a meta–analysis to understand the effects of light, temperature, and fire–related cues on the germination ofcampo rupestrespecies and how the before mentioned ecological groups and seed mass affect such responses. Key Results: All traits showed a strong phylogenetic signal.Campo rupestrespecies responded positively to light and had optimal germination between 20–30 °C. The effect of temperatures below and above this range was modulated by growth form, with shrubs requiring and tolerating higher temperatures to germinate. We only found evidence of a moderating effect of seed mass for responses to heat shocks, with larger, dormant seeds tolerating heat better. Heat shocks above 200 °C killed seeds, but smoke accelerated germination. No consistent differences in germination responses were found between restricted and widespread species or microhabitats. Still, species from xeric habitats evolved phenological strategies to synchronise germination with higher soil water availability. Conclusions: Evolutionary history plays a major role in the seed ecology of Brazilian rock outcrop vegetation. However, seed traits and germination responses did not explain species geographic distribution and microhabitats, suggesting other traits are more likely to explain such differences.

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Section: Discussionmentioning

confidence: 99%

“…Second, soil samples –especially thicker ones– might contain a considerable amount of exotic and non-target species (Le Stradic et al . 2018; Rezende et al . 2021).…”

Section: Discussionmentioning

confidence: 99%