Changes in decomposition rate and litterfall in riparian zones with different basal area of exoticEucalyptusin south-eastern Brazil

How do management alternatives of fast‐growing forests affect water quantity and quality in southeastern Brazil? Insights from a paired catchment experiment

“…Regarding water use in C2, the high proportion of native forest could explain the higher water use in this catchment (Zhang et al, 2012), which may be related to the presence of a developed root system (Christina et al, 2011) and its proximity to the water table (Salemi et al, 2012;Smethurst et al, 2015). Also, basal area of native forest at study area varies from 23.9 to 35.2 m 2 ha À1 (Santos et al, 2019) what is higher than 15.1 m 2 ha À1 , observed in high productive clones of Eucalyptus in Brazil at 5-years rotation (Scolforo et al, 2019). Considering the area-weighted contribution of native forest to the observed ET at catchment scale and assuming that the ET/P of the forest near the watercourse is higher due to water access, it is reasonable to think that the proportion (42%) of native forest vegetation in C2 may be influencing the ET rates found, as observed in other studies (Salemi et al, 2012;Zhang et al, 2012).…”

“…The catchments have riparian native vegetation buffer preserved along the watercourses, including scattered remnant trees of aged Eucalyptus saligna (from former plantation occurred at the end of the 1970's) and native species characteristic of semi‐decidual seasonal forest in secondary growth since 1985 (Santos et al, 2019). Currently, native vegetation represents 8%, 42% and 13% of the areas of the C1, C2 and C3, respectively, and those areas are not managed [unmanaged native vegetation].…”

“…The catchments have riparian native vegetation buffer preserved along the watercourses, including scattered remnant trees of aged Eucalyptus saligna (from former plantation occurred at the end of the 1970's) and native species characteristic of semi-decidual seasonal forest in secondary growth since 1985 (Santos et al, 2019) 1).…”

The big picture of field hydrology studies in Brazil

“…Replacing natural forest with cattle pasture has the potential to reduce subsurface flow, while increasing surface flow pathways (Chaves et al 2008, Germer et al 2009, Hayhoe et al 2011, Neill et al 2011). Field-based research studies have shown that LUCC affects ecological and hydrological processes in general (Reichert et al 2017); more specifically, LUCC alters soil hydraulic properties (Elsenbeer et al 1999), runoff generation (Zimmermann et al 2006, Guzha et al 2015, soil compaction and recurrence of perched water tables (Germer et al 2010), water availability for downstream users (Garcia et al 2018) and decomposition rates of native and eucalyptus leaves in riparian zones (Santos et al 2019).…”

Recuperação De Matéria Seca E Matéria Mineral De Silagem De Cana - De - Açúcar Tratada Com Inoculante E Diferentes Níveis De Aditivos Químicos

“…Alterações no uso e ocupação do solo, principalmente em ambientes anteriormente cobertos por espécies nativas, não altera somente os níveis de carbono do solo, mas proporciona mudanças na fertilidade, na densidade do solo, aumentos nos níveis de acidez e modificações na composição química da matéria orgânica do solo (MOS) (Carrasco-Letelier et al, 2004;Dick et al, 2011;Shrestha et al, 2015;Pulido et al, 2018;Santos et al, 2019). Essas modificações são mais sensíveis em regiões de clima tropical, uma vez que os solos destas regiões são altamente intemperizados, sendo, portanto, dependentes dos conteúdos de MOS (Adiaha, 2017).…”