EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/26/2021 | 8:30 AM - 10:30 AM | HOW RESTORED RIPARIAN FOREST CAN ATTENUATE SEDIMENT EXPORT FROM CATCHMENTS UNDER FOREST PLANTATION MANAGEMENT? | Virtual Platform
HOW RESTORED RIPARIAN FOREST CAN ATTENUATE SEDIMENT EXPORT FROM CATCHMENTS UNDER FOREST PLANTATION MANAGEMENT?
Forest operations can alter physical, chemical and biological attributes of streams that consequently, interfere in the ecological processes of the aquatic ecosystem. The objective of this study was to assess forest operations effects on sediment export according to management intensity and riparian condition in subtropical Brazil. Three catchments, with different management systems, were evaluated: eucalyptus forest plantation (EUC), native forest plantation (NAT), and mosaic of forests plantation (MOS), in southeastern Brazil. The sediment export was estimated through a relationship between turbidity and suspended sediment concentration. The results showed that sediment export ranged from 0.032 Mg ha?1 yr?1 to 0.411 Mg ha?1 yr?1. Regarding riparian attenuation effect, two aspects should be considered. 1) the condition of riparian forest since degraded or initial stage forests maybe not function properly to protect soils; 2) the riparian forest proportion should be not enough to attenuate large managed areas. We propose that the ratio of managed area by riparian area (M/R) may explain sediment export. Taking as example the studied catchments, we could recommend M/R < 4, with riparian areas occupying at least 20% of catchments, what is usual at certified forest plantations in Brazil.
- Tropical streams and lakes
- Restoration
- Landscape
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Presenters/Authors
Matheus Ogasawara
(), University of São Paulo, matheus.ogasawara@usp.br;
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Gláucia Regina Santos
(), University of São Paulo “Luiz de Queiroz” College of Agriculture (ESALQ/USP), glauciaflorestal@usp.br;
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Carla Cassiano
(), Federal University of Mato Grosso, carlacassiano.ufmt@gmail.com;
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Beverley Wemple
(), University of Vermont, beverley.wemple@uvm.edu;
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Silvio Ferraz
(), University of São Paulo, USP/ESALQ, Dept of Forest Sciences, Brazil, silvio.ferraz@usp.br;
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