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Title: Impact of climatic and hydrological disturbances on blackwater floodplain forests in Central Amazonia
Authors: Neves, Juliana Rocha Duarte
Piedade, Maria Teresa Fernandez
Resende, Angélica Faria de
Feitosa, Yuri Oliveira
Schöngart, Jochen
Keywords: Age Structure
Climate Effect
Extreme Event
Floodplain Forest
Hydroelectric Power Plant
Hydrological Regime
Hydrological Response
Topographic Effect
Balbina Reservoir
Issue Date: 2019
metadata.dc.publisher.journal: Biotropica
metadata.dc.relation.ispartof: Volume 51, Número 4, Pags. 484-489
Abstract: Extreme climatic events and anthropic disturbances affect the hydrological regime of Amazonian rivers and connected floodplain forests. This study aims to investigate the impacts of the Balbina hydroelectric power plant on the floodplain forests of the Uatumã River, in the Central Amazon. For this, tree age and diameter increment from the most abundant tree species of three different topographic levels were obtained and analyzed in the affected area downstream of the Balbina dam (Uatumã River) and compared to an undisturbed site (Abacate River, affluent) considering age structure and mean diameter increments between the topographic levels and the two systems. The occurrence of old trees is much lower at the disturbed site compared to the undisturbed system. Especially at the middle topography of the Uatumã site, we observed tree species with high mean diameter increment indicating a strong disturbance. We suggest that the disturbances may be associated with extreme hydro-climatic events, such as extreme droughts that occurred during the El Niño years 1925/26 and 1982/83 and that these events may increase vulnerability of igapó floodplains to wildfires. Abstract in Portuguese is available with online material. © 2019 The Association for Tropical Biology and Conservation
metadata.dc.identifier.doi: 10.1111/btp.12667
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