Results 91 to 100 of about 79,104 (288)

Carbon, Nitrogen, and Corresponding Stable Isotope Signatures Reveal Channel Banks as Major Sediment Sources in a Tropical Agricultural Watershed

Land Degradation &Development, EarlyView.
ABSTRACT Uncertainties about the applicability of δ13C and δ15N as tracers of sediment sources in tropical river basins highlight the need for more in‐depth investigations of these isotopes. This study therefore assessed the effectiveness of δ13C and δ15N signatures in discriminating sediment sources in an agricultural catchment in Northeast Brazil ...
Fábio Farias Amorim, Yuri Jacques Agra Bezerra da Silva, Rennan Cabral Nascimento, Ygor Jacques Agra Bezerra da Silva, Angelo Jamil Maia, Tales Tiecher, Jean Paolo Gomes Minella, Yusheng Zhang, Hari Ram Upadhayay, Simon Pulley, Adrian L. Collins   +10 more
wiley   +1 more source

Modeling nitrogen loading in a small watershed in southwest China using a DNDC model with hydrological enhancements [PDF]

, 2011
The degradation of water quality has been observed worldwide, and inputs of nitrogen (N), along with other nutrients, play a key role in the process of contamination.
Deng, Jia, Jian, Z., Li, Changsheng, Wang, X., Zheng, Xunhua, Zhou, Zaixing, Zhu, Bo   +6 more
core   +5 more sources

Estimating Soil Compaction Risk at Regional Scales Using Meteorological Data and Soil Spectroscopy

Land Degradation &Development, EarlyView.
ABSTRACT Soil compaction is a significant form of soil degradation in Europe, reducing agricultural productivity, limiting carbon sequestration and increasing greenhouse gases emissions. In response, the forthcoming European Union Soil Monitoring and Resilience Law requires spatial assessment of topsoil and subsoil compaction risk at district, that is,
Felipe Bachion de Santana, Rebecca. L. Hall, Longnan Shi, Owen Fenton, Victoria Lowe, Giulia Bondi, Lilian O'Sullivan, Karen Daly   +7 more
wiley   +1 more source

How the Physical and Chemical Properties Affect the Heavy Metal Content in Surface Water in Different Types of Peatlands

Land Degradation &Development, EarlyView.
ABSTRACT Only ~3% of the global land surface is covered by peatlands, yet more than one‐third of global soil carbon is stored in these ecosystems and contaminant filtration can be provided. The extent to which peat humification (Fibric–Hemic–Sapric) is linked to dissolved heavy metals in peatland surface waters has remained poorly quantified at a ...
Stanisław Łyszczarz, Norbert Szymański, Michał Jasik, Wojciech Piaszczyk, Andrzej Szlachta, Mirosław Żelazny, Ewa Błońska, Jarosław Lasota, Stanisław Małek   +8 more
wiley   +1 more source

Simulated Biogeochemical Effects of Seawater Restoration on Diked Salt Marshes, Cape Cod National Seashore, Massachusetts, U.S.

Soil Systems
Efforts have been underway worldwide to reintroduce seawater to many historically diked salt marshes for restoration of tidal flow and associated estuarine habitat.
Craig J. Brown
doaj   +1 more source

Anaerobic Corrosion Phenomena of Cast Iron and Copper in Artificial Groundwater at Elevated Temperature

Materials and Corrosion, EarlyView.
This study examines corrosion of copper and cast iron as candidate canister materials for high‐level radioactive waste disposal in contact with bentonite suspension. The influence of three electrolyte compositions on corrosion behavior under repository‐relevant conditions is assessed.
Louisa Panjiyar, Martin Ende, Christiane Stephan‐Scherb   +2 more
wiley   +1 more source

Morphology and tectonics of the Mid-Atlantic Ridge, 7°–12°S

, 2003
We present swath bathymetric, gravity, and magnetic data from the Mid-Atlantic Ridge between the Ascension and the Bode Verde fracture zones, where significant ridge–hot spot interaction has been inferred.
Bijwaard, Bonatti, Bougault, Bourdon, Brozena, Brozena, Bruguier, Cande, Cande, Carlson, Chen, Davies, Delaney, DeMets, Dosso, Fontignie, Graham, Grindlay, Hanan, Heirtzler, Hey, Ito, Ito, J. M. Brozena, Johnson, Kincaid, Klingelhoefer, Kuo, LaBrecque, Macdonald, Malamud, Michael, Miller, Minshull, Minshull, N. J. Bruguier, Naar, Niu, O'Connor, Parker, Parker, Parsons, Phipps Morgan, Reid, Sandwell, Schilling, Schilling, Shen, Shirey, Sleep, Small, T. A. Minshull, Tucholke, van Andel, Verma, Vogt, Wolfe   +56 more
core   +1 more source

Paradigm shift in determining Neoproterozoic atmospheric oxygen [PDF]

, 2016
ACKNOWLEDGMENTS We thank the Geological Survey of Australia for permission to sample the Empress 1A and Lancer 1 cores, the Natural Sciences and Engineering Research Council of Canada for financial support (grant #7961–15) of U.
Benison, Kathleen, Blamey, Nigel J. F., Brand, Uwe, Lécuyer, Christophe, Meng, Fanwei, Ni, Pei, Parnell, John, Spear, Natalie   +7 more
core   +3 more sources

Impacts of reindeer grazing on phosphorus sorption and nutrient availability in a tundra site

Oikos, EarlyView.
Reindeer Rangifer tarandus, a large circumpolar herbivore, can influence whether nitrogen (N) or phosphorus (P) is the primary limiting nutrient in tundra plant communities. Specifically, findings from a site in northern Scandinavia suggest that under conditions where reindeer grazing stimulates inorganic N availability, grazing may drive ecosystems ...
Jerzy Szejgis, Johan Olofsson, Henni Ylänne, Michael J. Gundale, Reiner Giesler, Maja K. Sundqvist   +5 more
wiley   +1 more source

Influence of chemical reaction kinetics on electrokinetic remediation modelling results [PDF]

, 2017
A numerical model describing transport of multiple species and chemical reactions during electrokinetic treatment is presented. The transport mechanisms included in the model were electromigration and electroosmosis.
Ceccarini, Alessio, Gomez-Lahoz, Cesar, Iannelli, Renato, Masi, Matteo, Paz-Garcia, Juan Manuel, Villen-Guzman, Maria   +5 more
core