
Effects of water surplus over a secondary forest remain after 16 years in the Amazonia
Julia Isabella de Matos Rodrigues (1) , Walmer Bruno Rocha Martins (1-2), Victor Pereira de Oliveira (3), Hiago Felipe Cardoso Pacheco (1), José Rozendo de Lima Silva (4), Francisco de Assis Oliveira (1-4), Gustavo Schwartz (1-5)
iForest - Biogeosciences and Forestry, Volume 18, Issue 5, Pages 234-241 (2025)
doi: https://doi.org/10.3832/ifor4537-018
Published: Sep 06, 2025 - Copyright © 2025 SISEF
Research Articles
Abstract
Water and Nutrient Manipulation in a Secondary Forest (MANFLORA) was conducted in the eastern Amazon region over eight years. In this experiment, three treatments were established: Control (CTL), Litter Removal (REM), and Soil Irrigation (IRR) within the secondary forest. The objective was to understand the effects of resource management on forest dynamics after slash-and-burn agriculture. The floristic composition and vegetation structure were evaluated 16 years after the experiment’s conclusion. The absolute number of species and individuals varied among CTL, IRR, and REM. Hierarchical clustering based on Jaccard’s index revealed similarity in floristic composition between CTL and IRR, both for individuals ≥ 15 cm in circumference at breast height and those in natural regeneration. Nutrient shortage through litter removal and periodic irrigation did not significantly affect the vegetation structure, likely due to the greater adaptability of species to soil and climate changes. Regarding floristic composition, REM presented long-term losses, indicating that soil nutrient availability can be a critical factor for the recovery of floristic composition in secondary forests.
Keywords
Forest Succession, Resource Management, Structural Indicators, Composition Indicators
Authors’ Info
Authors’ address
Walmer Bruno Rocha Martins 0000-0001-8795-1703
Hiago Felipe Cardoso Pacheco 0000-0002-1920-0227
Francisco de Assis Oliveira 0000-0002-3872-8342
Gustavo Schwartz 0000-0002-1717-4491
Graduate Program in Forestry Science, Av. Presidente Tancredo Neves, 2501, Belém, Pará, 66077-530 (Brazil)
Federal Rural University of Amazonia, Tv. Pau Amarelo, Capitão Poço, Pará, 68650-000 (Brazil)
National Institute of Amazonia Research, Av. Constelação Cruzeiro do Sul, Manaus, Amazonas, 69060-062 (Brazil)
Francisco de Assis Oliveira 0000-0002-3872-8342
Federal Rural University of Amazonia, Department of Agrarian Science, Av. Presidente Tancredo Neves, 2501, Belém, Pará, 66077-530 (Brazil)
Embrapa Eastern Amazonia, Tv. Dr. Enéas Pinheiro, Belém, Pará, 66095-903 (Brazil)
Corresponding author
Paper Info
Citation
Rodrigues JIM, Martins WBR, Oliveira VP, Pacheco HFC, Silva JRL, Oliveira FA, Schwartz G (2025). Effects of water surplus over a secondary forest remain after 16 years in the Amazonia. iForest 18: 234-241. - doi: 10.3832/ifor4537-018
Academic Editor
Paola Mairota
Paper history
Received: Dec 05, 2023
Accepted: Apr 03, 2025
First online: Sep 06, 2025
Publication Date: Oct 31, 2025
Publication Time: 5.20 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2025
Open Access
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