Search Results - "Figueiredo, Ricardo O"

Dissolved CO2 in small catchment streams of eastern Amazonia: A minor pathway of terrestrial carbon loss by Davidson, Eric A., Figueiredo, Ricardo O., Markewitz, Daniel, Aufdenkampe, Anthony K.

“…Production of carbon dioxide (CO2) in soils can lead to supersaturation of dissolved free CO2 (pCO2) in groundwater, which later evades to the atmosphere as…”
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Nitrogen Fixation Inputs in Pasture and Early Successional Forest in the Brazilian Amazon Region: Evidence From a Claybox Mesocosm Study by Davidson, Eric A., Markewitz, Daniel, O. Figueiredo, Ricardo, Camargo, Plínio B.

“…The role of biological nitrogen fixation (BNF) during secondary forest succession and in tropical pastures has been investigated and debated for several…”
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Runoff sources and land cover change in the Amazon: an end-member mixing analysis from small watersheds by Neill, Christopher, Chaves, Joaquin E., Biggs, Trent, Deegan, Linda A., Elsenbeer, Helmut, Figueiredo, Ricardo O., Germer, Sonja, Johnson, Mark S., Lehmann, Johannes, Markewitz, Daniel, Piccolo, Marisa C.

“…The flowpaths by which water moves from watersheds to streams has important consequences for the runoff dynamics and biogeochemistry of surface waters in the…”
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Control of cation concentrations in stream waters by surface soil processes in an Amazonian watershed by Krusche, Alex V, Markewitz, Daniel, Victoria, Reynaldo L, Davidson, Eric A, Figueiredo, Ricardo de O

“…The chemical composition of ground waters and stream waters is thought to be determined primarily by weathering of parent rock. In relatively young soils such…”
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Hydrological and biogeochemical processes in a changing Amazon: results from small watershed studies and the large-scale biosphere-atmosphere experiment by Neill, Christopher, Elsenbeer, Helmut, Krusche, Alex V., Lehmann, Johannes, Markewitz, Daniel, de O. Figueiredo, Ricardo

“…The Amazon Basin is the world's largest tropical forest region and one where rapid human changes to land cover have the potential to cause significant changes…”
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Land-use effects on the chemical attributes of low-order streams in the eastern Amazon by Figueiredo, Ricardo O., Markewitz, Daniel, Davidson, Eric A., Schuler, Azeneth E., dos S. Watrin, Orlando, de Souza Silva, Patrício

“…Deforestation is altering small catchment hydrobiogeochemistry in the Amazon. To evaluate land use change effects on water chemistry and other measures of…”
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Soil and tree response to P fertilization in a secondary tropical forest supported by an Oxisol by Markewitz, Daniel, Figueiredo, Ricardo de O., de Carvalho, Cláudio J. Reis, Davidson, Eric A.

“…Mature tropical forests are considered to be P limited and to cycle P efficiently. Whether P limitations are significant in younger secondary tropical forests,…”
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Objective indicators of pasture degradation from spectral mixture analysis of Landsat imagery by Davidson, Eric A., Asner, Gregory P., Stone, Thomas A., Neill, Christopher, Figueiredo, Ricardo O.

“…Degradation of cattle pastures is a management concern that influences future land use in Amazonia. However, “degradation” is poorly defined and has different…”
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Five native tree species and manioc under slash-and-mulch agroforestry in the eastern Amazon of Brazil: plant growth and soil responses by Joslin, Aaron H, Markewitz, Daniel, Morris, Lawrence A, DeAssis Oliveira, Francisco, Figueiredo, Ricardo O, Kato, Oswaldo R

“…Throughout the Amazon of Brazil, manioc (Manihot esculenta) is a staple crop produced through slash-and-burn agriculture. Nutrient losses during slash-and-burn…”
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Discharge—calcium concentration relationships in streams of the Amazon and Cerrado of Brazil: soil or land use controlled by Markewitz, Daniel, Lamon, E. Conrad, Bustamante, Mercedes C., Chaves, Joaquin, Figueiredo, Ricardo O., Johnson, Mark S., Krusche, Alex, Neill, Christopher, Silva, José S. O.

“…Stream discharge-concentration relationships are indicators of terrestrial ecosystem function. Throughout the Amazon and Cerrado regions of Brazil rapid…”
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Water storage and runoff processes in plinthic soils under forest and pasture in eastern Amazonia by de Moraes, Jorge M., Schuler, Azeneth E., Dunne, Thomas, Figueiredo, Ricardo de O., Victoria, Reynaldo L.

“…Extensive areas of the Amazon River basin are underlain by soils with shallow impeding horizons. To evaluate how the distinctive hydraulic properties of soil…”
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Nitrogen and Phosphorus Limitation of Biomass Growth in a Tropical Secondary Forest by Davidson, Eric A., Cláudio J. Reis de Carvalho, Ima C. G. Vieira, Ricardo de O. Figueiredo, Paulo Moutinho, Françoise Yoko Ishida, Maria Tereza Primo dos Santos, José Benito Guerrero, Kemel Kalif, Renata Tuma Sabá

“…Understanding secondary successional processes in Amazonian terrestrial ecosystems is becoming increasingly important as continued deforestation expands the…”
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Urbanization and small household agricultural land use choices in the Brazilian Amazon and the role for the water chemistry of small streams by Cak, Anthony D., Moran, Emilio F., Figueiredo, Ricardo de O., Lu, Dengsheng, Li, Guiying, Hetrick, Scott

“…Many small watersheds and streams in the Brazilian Amazon have been impacted by agriculture and urban development, often due to household economic needs and…”
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Dissolved rainfall inputs and streamwater outputs in an undisturbed watershed on highly weathered soils in the Brazilian cerrado by Markewitz, Daniel, Resende, Julio C. F., Parron, Lucilia, Bustamante, Mercedes, Klink, Carlos A., Figueiredo, Ricardo de O., Davidson, Eric A.

“…The cerrados of Brazil cover 2 million km2. Despite the extent of these seasonally dry ecosystems, little watershed research has been focused in this region,…”
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Dissolved CO 2 in small catchment streams of eastern Amazonia: A minor pathway of terrestrial carbon loss by Davidson, Eric A., Figueiredo, Ricardo O., Markewitz, Daniel, Aufdenkampe, Anthony K.

“…Production of carbon dioxide (CO 2 ) in soils can lead to supersaturation of dissolved free CO 2 (pCO 2 ) in groundwater, which later evades to the atmosphere…”
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Objective indicators of pasture degradation from spectral mixture analysis of Landsat imagery : Scaling amazonian Carbon dynamics by DAVIDSON, Eric A, ASNER, Gregory P, STONE, Thomas A, NEILL, Christopher, FIGUEIREDO, Ricardo O

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Discharge-calcium concentration relationships in streams of the Amazon and Cerrado of Brazil: soil or land use controlled: Land-Water Interaction Studies of the Large-Scale Biosphere-Atmosphere Experiment in Amazônia by MARKEWITZ, Daniel, LAMON, E. Conrad, BUSTAMANTE, Mercedes C, CHAVES, Joaquin, FIGUEIREDO, Ricardo O, JOHNSON, Mark S, KRUSCHE, Alex, NEILL, Christopher, SILVA, José S. O

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Runoff sources and land cover change in the Amazon: an end-member mixing analysis from small watersheds: Land-Water Interaction Studies of the Large-Scale Biosphere-Atmosphere Experiment in Amazônia by NEILL, Christopher, CHAVES, Joaquin E, PICCOLO, Marisa C, BIGGS, Trent, DEEGAN, Linda A, ELSENBEER, Helmut, FIGUEIREDO, Ricardo O, GERMER, Sonja, JOHNSON, Mark S, LEHMANN, Johannes, MARKEWITZ, Daniel

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Organic carbon fluxes within and streamwater exports from headwater catchments in the southern Amazon by Johnson, Mark S., Lehmann, Johannes, Selva, Evandro Carlos, Abdo, Mara, Riha, Susan, Couto, Eduardo Guimarães

“…Forms and quantities of organic carbon (C) fluxes at the soil surface, and organic C exports from four small (1–2 ha) headwater catchments were quantified and…”
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The biogeochemistry of dissolved nitrogen, phosphorus, and organic carbon along terrestrial-aquatic flowpaths of a montane headwater catchment in the Peruvian Amazon by Saunders, Thomas J., McClain, Michael E., Llerena, Carlos A.

“…Dissolved nitrogen (N), phosphorus (P), and organic carbon (C) were sampled along two transects in a first‐order montane tropical (2414 m.a.s.l.) rainforest…”
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