| Texto completo | |
| Autor(es): |
Bombo, Aline Bertolosi
;
Fidelis, Alessandra
;
Le Stradic, Soizig
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | AMERICAN JOURNAL OF BOTANY; v. N/A, p. 10-pg., 2025-10-10. |
| Resumo | |
Premise In edaphic old-growth grasslands, the low nutrient content of the soil restricts plant species establishment. Additionally, fire remains an important factor in shaping vegetation structure and belowground biomass investment in old-growth grasslands, such as the campos rupestres. However, how fire frequency affects the belowground components of these grasslands remain poorly understood. Addressing this gap is essential for understanding plant resilience and regeneration strategies in fire-prone ecosystems worldwide and advancing trait-based perspectives on plant persistence under recurrent disturbances.Methods We compared plant belowground components across three campos rupestres sites differing in fire frequencies (1, 6, and 10 fires in 34 years). At each site, we quantified fine root biomass, specialized belowground organ biomass, bud bank size, bud-bearing organ density, and organ composition to evaluate how repeated fires shape belowground traits related to persistence and regeneration.Results High fire frequencies reduced bud bank size and belowground organ density, but altered organ composition: Graminoid and forb rhizomes declined in number, whereas woody rhizomes became more common. Overall, belowground organ biomass increased with increasing fire frequency, but fine root biomass decreased.Conclusions Our study indicates that changes in belowground components driven by fire frequency may lead to irreversible shifts in community structure, where very frequent fires can jeopardize the resilience of the campos rupestres. For such systems, novel fire regimes can have devastating effects, threatening biodiversity, compromising conservation status, and reducing ecosystem services. (AU) | |
| Processo FAPESP: | 15/06743-0 - Como a época do fogo afeta a vegetação do cerrado? |
| Beneficiário: | Alessandra Tomaselli Fidelis |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 17/02934-1 - Depois do fogo, de onde rebrotam as plantas? Avaliação do banco de gemas e órgãos subterrâneos do Cerrado |
| Beneficiário: | Aline Bertolosi Bombo |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 16/13232-5 - Cavando mais fundo: contribuição de atributos subterrâneos das plantas no funcionamento de ecossistemas herbáceos primários tropicais |
| Beneficiário: | Soizig Anne Le Stradic |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |