| Texto completo | |
| Autor(es): |
Chiminazzo, Marco Antonio
;
Fidelis, Alessandra
;
Alvarez, Felipe
;
Charles-Dominique, Tristan
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ANNALS OF BOTANY; v. N/A, p. 10-pg., 2026-01-14. |
| Resumo | |
Background and Aims Growth patterns in tropical savanna woody plants remain poorly understood across their vast diversity of strategies and plant forms. Whether tropical woody species exhibit rhythmic or seasonal growth remains understudied. This study investigates growth rhythmicity in Cerrado woody species, focusing on their post-fire resprouting patterns and their relationship to rainfall seasonality and fire.Methods We analysed the number and characteristics of growth units produced after fire events (2020 and 2021 wildfires) in 21 Cerrado species. Satellite imagery and morphological markers along stems - such as internode length and bud scars - were used to assess growth cycles.Key Results Cerrado species exhibited clear annual growth, typically producing one growth unit per year, closely aligned with the rainy season. Morphological traits reliably marked these cycles. Primary growth was consistently greater in the first growth unit produced after fire, probably due to increased carbohydrate allocation and reduced apical dominance of previous existing stems. This enhanced growth may help position foliage above future flame zones, improving survival. As species exhibited an annual growth pattern, we observed synchrony between the number of growth units and the number of years since the last fire.Conclusions Woody plants in the Cerrado grow through annual growth units formed from buds with preformed structures that elongate during the rainy season. The extent of this growth varies among species and individual life histories. Fire, a frequent disturbance, stimulates the production of larger growth units. This response indicates that savanna woody plants can rapidly rebuild above-ground biomass after burning, probably supported by stored carbohydrates and the release of apical dominance. These patterns highlight the resilience of Cerrado vegetation. To deepen our understanding of tropical plant development, future work should relate growth units to species phenology, rainfall variability and vegetation types. (AU) | |
| Processo FAPESP: | 21/09269-9 - Savanas, florestas e zonas de transição: métodos integrados para identificar a coexistência de biomas |
| Beneficiário: | Marco Antonio Chiminazzo |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 23/09208-5 - Arquitetura de espécies lenhosas do Cerrado e suas relações com o ambiente |
| Beneficiário: | Marco Antonio Chiminazzo |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 23/16620-0 - Fogo como ferramenta de manejo e restauração no Cerrado no Antropoceno |
| Beneficiário: | Alessandra Tomaselli Fidelis |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOTA - Temático |