Publicação
Cátions de fósforo e básicos impulsionam dinâmicas radiculares contrastantes em uma floresta amazônica central.
Jéssica Schmeisk-Rosa and Kelly M. Andersen and Amanda L. Cordeiro and Anna Carolina Martins Moraes
Plant and Soil
Springer Science and Business Media LLC
0032-079X | 1573-5036
| Kelly Marie Andersen | Autor | ||
| Anna Carolina Martins Moraes | Autor | ||
| Raffaello Di Ponzio | Autor | ||
| Maria Pires Martins | Autor | ||
| Hellen Cunha | Autor | ||
| Sheila Trierveiler Souza | Autor | ||
| Gyovanni Ribeiro | Autor | ||
| Adriana Castro Conceição | Autor | ||
| José Luís Campana Camargo | Autor | ||
| Iain P. Hartley | Autor | ||
| Carlos Alberto Nobre Quesada | Autor | ||
| Laynara Figueiredo Lugli | Autor |
@article{Schmeisk-Rosa2026_pdbff-0887,
author = {Jéssica Schmeisk-Rosa and Kelly M. Andersen and Amanda L. Cordeiro and Anna Carolina Martins Moraes and Ana Cláudia Francisco Salomão and Rafael Leandro de Assis and Raffaello Di Ponzio and Renata Vilar de Almeida and Maria Pires Martins and Hellen Fernanda Viana Cunha and Nathielly Pires Martins and Sheila Trierveiler de Souza and Gyovanni Augusto Aguiar Ribeiro and José Augusto Salim and Érick Oblitas and Sara Deambrozi Coelho and Adriana C. Conceição and Bruno Takeshi Tanaka Portela and Oscar J. Valverde-Barrantes and José Luís C. Camargo and Patrick Meir and Anja Rammig and Iain P. Hartley and Carlos Alberto Nobre Quesada and Laynara F. Lugli},
year = {2026},
title = {Phosphorus and base cations drive contrasting root dynamics in a central Amazon forest},
abstract = {<jats:title>Abstract</jats:title> <jats:sec> <jats:title>Background and aims</jats:title> <jats:p>In highly weathered soils of central Amazonia, where nutrients such as phosphorus (P) and base cations are scarce, fertilization experiments have demonstrated above- and belowground effects on total net primary productivity (NPP). This study examined how fine root stocks and turnover responded to added nutrients over a two-year period. We predicted that adding a limiting nutrient would decrease fine root stocks and increase turnover, with the strongest effects from P, followed by base cations, and no response to N.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>Fine roots (< 2 mm diameter) were sampled from the 0–30 cm soil layer in a low-fertility primary forest in central Amazon subjected to a large-scale factorial experiment adding P, base cations, and N over two years. Fine root turnover was calculated as the ratio between fine root productivity, measured with in-growth cores, and fine root stock.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>Fine root stocks remained unchanged with nutrient addition. However, P increased root turnover by 23% and 48% in the first and second years, respectively, while base cations addition reduced turnover by 24% in year two. N had no significant effect, though a trend toward reduced turnover was observed in the second year.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusion</jats:title> <jats:p>The results of this study show that fine root standing stock and turnover in the central Amazon are regulated by soil nutrient availability, especially P and base cations. The contrasting responses observed suggest distinct belowground resource-use strategies for different nutrients, shaped by the nutrient specific mobility in the soil and physiological role in the plant.</jats:p> </jats:sec>},
issn = {0032-079X | 1573-5036},
url = {https://doi.org/10.1007/s11104-026-08303-2},
doi = {10.1007/s11104-026-08303-2},
journal = {Plant and Soil},
publisher = {Springer Science and Business Media LLC},
pdbff_st = {PDBFF-ST-0887 - BDFFP Technical Series Number}
}