Effects of sediment deposition on aboveground net primary productivity, vegetation composition, and structure in riparian forests

Cavalcanti, Guadalupe G.; Lockaby, B. Graeme

doi:10.1672/0277-5212(2006)26[400:eosdoa]2.0.co;2

Cited by 23 publications

(24 citation statements)

References 30 publications

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“…Even at watershed 3, which has a B25 years old riparian forest, the course of recovery towards a C 3 signal can be seen in most parts of the transects. This is in accordance with findings that show that soils dominated by C 4 organic matter became dominated by C 3 organic matter within approximately 10 years after reforestation (Cook et al 2014). …”

Section: Variability Within Riparian Areassupporting

confidence: 93%

“…Several studies have documented the strong deposition rates of overland-flow derived materials within riparian areas, especially in flow convergence zones (i.e. depressions) (Lowrance et al 1986, Cooper et al 1987, Cavalcanti & Lockaby 2005, Cavalcanti & Lockaby 2006, Schoonover et al 2006, Pires et al 2009, Kreutzweiser et al 2009, Mamoli et al 2012. Moreover, there is the fact that tussocks of this grass were observed in the forest during our field campaigns, suggesting that this C 4 signal might be derived from this persistent grass species (Guarantini et al 2008, Griscom et al 2009, Brancalion et al 2009).…”

Section: Variability Within Riparian Areasmentioning

confidence: 55%

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Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination

et al. 2016

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In this article, by using carbon stable isotopes, we assessed the past and present land use influences that riparian areas are subject within agricultural landscapes. Emphasis is given to the understanding of the effects of the 2012 Brazilian Forest Act on such areas. We selected five riparian areas within a highly C4 dominated agricultural landscape. Three of them had 30 meters native riparian forest buffer (NRFB) and two of them had 8 meter and no NRFB. We used three 100 meter-transects located 5, 15 and 30 meters relative to stream channel to obtain soil samples (0 - 10 cm). All riparian areas presented soil carbon isotopic signatures that are not C3 (native forests) irrespective of having or not 30 meters NRFB. Two cases presenting less than 30 meters NRFB had higher C4 derived carbon contribution. All of the other three areas that followed the 30 meters NRFB presented, to some degree, C4 derived carbon, which was attributed to C4 organic matter deposition originated from cultivated areas and, in one case, to the persistence of former exotic grasses. With the 2012 Forest Act allowing narrower buffers (< 30 meters), we expect C4 contributions to soil organic matter to remain high in riparian areas and streams within agricultural landscapes dominated by C4 plants where 30 meter NRFB is no longer required. Such contributions will likely continue to have detrimental effects on stream water quality and biota.

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Section: Variability Within Riparian Areassupporting

confidence: 93%

Section: Variability Within Riparian Areasmentioning

confidence: 55%

Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination

et al. 2016

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“…High rates of sediment deposition have been associated with overstory mortality (Cavalcanti and Lockaby 2006) and loss of microtopography (Werner and Zedler 2002). It is likely that changes in abiotic soil factors such as moisture and bulk density may lead to increased overstory mortality, which in turn would influence understory light and soil temperatures.…”

Section: Abiotic Soil Factorsmentioning

confidence: 99%

“…Sediment deposition may also affect community composition by altering ground surface microtopography, changing mineral soil substrate, damaging plants, and altering propagule availability. It has been suggested that sedimentation will allow opportunistic and early seral species to become established in gaps created by disturbance (Cavalcanti and Lockaby 2006;Levine and Stromberg 2001;Wardrop and Brooks 1998).…”

Section: Introductionmentioning

confidence: 99%

Changes in riparian forest composition along a sedimentation rate gradient

2010

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Riparian forests are highly valued for maintaining water quality through the retention of sediments and nutrients. They also provide some of the most diverse and species-rich habitats in the world. What is largely unknown, however, is how sediment deposition affects plant community composition in these forests. The objective of this study was to examine changes in plant community composition across a gradient of increasing rates of sedimentation in riparian forests in the southeastern Coastal Plain, USA. Seventeen plots were established within riparian forests receiving between 0 and 5.5 cm year -1 of sediment deposits. Species density and biomass estimates were collected annually from 2002 to 2006 for overstory and mid-story plant species within each plot. Percent cover and nested frequency of understory plant species were determined annually during 2004-2006. Measures of community composition in the understory, mid-story, and overstory layers of forests were compared to changes in environmental factors associated with increased sedimentation. In the understory, annual, exotic, and upland species had higher importance values in plots receiving high sediment deposition. The densities of shade-intolerant and N-fixing species in the mid-story also increased with increasing sedimentation rates. Increased overstory mortality was associated with high sedimentation rates, though increases in understory light levels in these gaps were not the main driver of understory species changes. Edaphic factors, such as soil texture, moisture, and temperature, were significantly correlated to species composition in all three forest layers, suggesting that changes in soil physical structure due to sedimentation may drive community-level changes in these forests.

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“…Têm a função de regular as transferências de energia e nutrientes de um ecossistema para outro (Paula Lima, 1989;Correll, 2001;Kageyama et al, 2002;Cavalcanti & Lockaby, 2006;Collins, 2010). Também são denominadas como zonas ripárias ou zonas-tampão.…”

Section: Introductionunclassified

Retenção de sedimentos removidos de área de lavoura pela mata ciliar, em Goiatuba (GO)

Santos¹,

Sparovek

2011

Rev. Bras. Ciênc. Solo

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RESUMOMatas ciliares são geralmente associadas à retenção de sedimentos e à mitigação dos impactos extrínsecos da erosão do solo em áreas de lavoura. No entanto, existem poucos estudos quantitativos sobre o tema. O objetivo deste trabalho foi analisar a eficiência de uma mata ciliar na retenção dos sedimentos produzidos na área de lavoura utilizando a técnica do 137 Cs. A amostragem foi realizada em julho de 2005, em transector alocado em área sob intenso uso agrícola, na região central do Brasil, cultivada com algodão em sistema de plantio convencional. A técnica do 137 Cs mostrou-se adequada para a determinação de perdas e ganhos de solo nesse tipo de estudo, evidenciando o depósito de sedimentos na área ciliar coberta de mata, bem como a eficácia dessa formação na retenção dos sedimentos advindos da área de lavoura.Termos indexação: erosão, 137 Cs, área de preservação permanente, sedimentos.

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Effects of sediment deposition on aboveground net primary productivity, vegetation composition, and structure in riparian forests

Cited by 23 publications

References 30 publications

Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination

Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination

Changes in riparian forest composition along a sedimentation rate gradient

Retenção de sedimentos removidos de área de lavoura pela mata ciliar, em Goiatuba (GO)

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