4 edition of Land-use change, soil process, and trace gas fluxes in the Brazilian Amazon basin found in the catalog.
Land-use change, soil process, and trace gas fluxes in the Brazilian Amazon basin
by Marine Biological Laboratory, National Aeronautics and Space Administration, National Technical Information Service, distributor in Woods Hole, Mass, [Washington, DC, Springfield, Va
Written in English
|Other titles||Land use change, soil process, and trace gas fluxes in the Brazilian Amazon basin.|
|Statement||principal investigator, Jerry M. Melillo/Paul A. Steudler.|
|Series||[NASA contractor report] -- 206776., NASA contractor report -- NASA CR-206776.|
|Contributions||Steudler, Paul A., United States. National Aeronautics and Space Administration.|
|The Physical Object|
The study areas are located in the southwestern corner of the Brazilian Amazon Basin, near the city of Rio Branco in the state of Acre, Brazil. The regional climate has a mean annual temperature of 26 degrees C; rainfall of 1, (plus or minus ) mm with a well-defined dry season (with less than 50 mm per month from June through August. Here we demonstrate that outgassing (evasion) of CO 2 from rivers and wetlands of the central Amazon basin constitutes an important carbon loss .
The effect of land use change on Hg mobilization from Amazon soils and sediments to the atmosphere and waterways is discussed, based on decadal data on Hg distribution in soil profiles under different land use categories; primary tropical forest, slashed forest prior to burning, silviculture and pastures. 1 Introduction. The majority of anthropogenic land use change in South America has occurred in Brazil's agricultural frontier or “arc of deforestation,” located along the transition from Amazon to Cerrado (tropical savanna) biomes (Lathuillière et al., ) (Figure 1).Forest loss (quantified as a combination of tree cover and land use) in this region accounted for 41% of global forest Cited by:
The findings bolster the Amazon basin's reputation as being the lungs of the planet, taking in carbon dioxide and releasing oxygen, but show . The agricultural landscape of French Guiana (Amazonia) is expected to undergo substantial change as a result of rapid population growth in the region. Such changes in the landscape will lead to the conversion of tropical forests into land destined for agricultural use. Little information is available on the effect of different agricultural systems on greenhouse gas (GHG) emissions in French Author: Caroline Petitjean, Cécile Le Gall, Célia Pontet, Kenji Fujisaki, Bernard Garric, Jean-Claude Horth.
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Get this from a library. Land-use change, soil process, and trace gas fluxes in the Brazilian Amazon basin. [Jerry M Melillo; Paul A Steudler; United States. National Aeronautics and Space Administration.]. Land-Use Change Impacts on Soil Processes: Tropical and Savannah Ecosystems - Kindle edition by F.Q.
Brearley, A.D. Thomas. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Land-Use Change Impacts on Soil Processes: Tropical and Savannah : Francis Q.
Brearley, Andrew David. Thomas. Ecosystem modeling and dynamic effects of deforestation on trace gas fluxes in Amazon tropical forests Article (PDF Available) in Forest Ecology and Management () October with. The objectives of this study were the quantification of trace gas flux (N 2 O, CO 2 Land-use change CH 4) in soils of the lower Amazon basin that are soil process with rice and soybean, and the relation of this.
We examined patterns in fine root dynamics on two soil types in a lowland moist Amazonian forest, and determined the effect of root decay on rates of C and N trace gas fluxes. Root production averaged (±35) and (±27) g m −2 yr −1 for years 1 and 2 of the study, respectively, and did not vary significantly with soil texture.
Mean C/N ratio for the basin to a depth of 1 m was Because these data represent sites with forest vegetation in the absence of significant disturbances, they represent a valuable baseline for evaluating the effects of land-use changes on soil C stocks in the Amazon Basin.
Please view the pdf by using the Full Text (PDF) link under 'View. The full text of this article hosted at is unavailable due to technical difficulties. Discovering the Amazon; Genesis, clasificacion y aptitud de explotacion de algunos suelos de la Orinoquia y la Amazonia colombianas; Land-use change, soil process, and trace gas fluxes in the Brazilian Amazon basin [microform] / principa Amazonia saqueada / Edmar Morel.
Tropical soils account for 10%–20% of the 15–35 Tg of atmospheric methane (CH4) consumed annually by soils, although tropical deforestation could be changing the soil sink. The objectives of this study were (a) to quantify differences in soil CH4 fluxes among primary forest, secondary forest, active pasture, and degraded pasture in eastern Amazonia; and (b) to investigate Cited by: The effect of conversion from forest-to-pasture upon soil carbon stocks has been intensively discussed, but few studies focus on how this land-use change affects carbon (C) distribution across soil fractions in the Amazon basin.
We investigated this in the 20 cm depth along a chronosequence of sites from native forest to three successively older by: Purchase Approaches to Scaling of Trace Gas Fluxes in Ecosystems, Volume 24 - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1. The emission of gases that may potentially intensify the greenhouse effect has received special attention due to their ability to raise global temperatures and possibly modify conditions for life on earth.
The objectives of this study were the quantification of trace gas flux (N2O, CO2 and CH4) in soils of the lower Amazon basin that are planted with rice and soybean, and the relation of this Author: Oliveira Junior Raimundo Cosme, Keller Michael, Crill Patrick, Beldini Troy, Van Haren Joost, Camarg.
Portions of the Amazon basin are experiencing a transition in energy and water cycles. Evidence suggests that the Amazon may also be transitioning from a. Soil Mapping and Process Modeling for Sustainable Land Use Management - Kindle edition by Pereira, Paulo, Brevik, Eric, Muñoz-Rojas, Miriam, Miller, Bradley.
Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Soil Mapping and Process Modeling for Sustainable Land Use : $ Worldwide, land change is responsible for one-fifth of anthropogenic carbon emissions.
In Brazil, three-quarters of carbon emissions originate from land change. This study represents a municipal-scale study of carbon fluxes from vegetation in Rio Branco, Brazil.
Land-cover maps of pasture, forest, and secondary growth from,and were produced using an unsupervised. The list of trace gas fluxes measured by micrometeorological methods and the range of techniques employed have expanded greatly through the last Flux measurements of heat and water vapour over tropical forests began at a site close to Manaus in the Amazon basin in the The major change in land use in progress in Borneo is from Cited by: Simulating SOC changes in 11 land use change chronosequences from the Brazilian Amazon with RothC and Century models.
Agriculture, Ecosystems & Environment.pp. Modelled soil organic carbon stocks and changes in the Indo-Gangetic Plains, India from to Cited by: Brazilian basin (Moraes et al., ), assuming constant values for Db (mean Db by soil type).
A survey called RADAMBRASIL reported soil anal- yses for about 12 O00 soil horizons representing soil profiles throughout the Amazon basin.
Carbon and other soil DroDerties were routinelv measured but not. The Amazon basin in transition have led to a steep decline in forest clearing in the Brazilian Amazon, from neakm2 yr21 in to less than 7,km2yr21 in However, this progress remains fragile.
The river system Although selective logging is not an immediate land-use change, itCited by: The mathematical modelling of soil organic matter dynamics provided important data about the turnover rate of the soil organic matter on areas converted to pasture.
This kind of information will be useful for future studies of total carbon fluxes resulting from land use change in the Amazon by:. Analysis of variance (ANOVA) was used to test for differences in CH 4 and N 2 O fluxes, WFPS, soil temperature, soil bulk density, and soil chemistry parameters among land-use/disturbance categories.
Statistical analyses of fluxes, WFPS, and temperature were conducted separately by catchment zone (upland, wetland), study point (GP01, GP09, GP11 Cited by: Chapter 2 (Page no: 13) Soil and land use in the Brazilian Amazon. On the basis of the Brazil Soil Map and the current Brazilian Soil Classification System, thirteen major representative soil classes of the Brazilian territory can be distinguished.
Tropical forest ecosystems are very complex and very little information is available about their functioning, which is essential for the delivery of services to human populations.
This problem has the objective of unraveling the mechanisms of tropical forest ecosystem function through long-term studies of watersheds functioning when subject to anthropogenic and natural disturbances.