Results 111 to 120 of about 11,234 (241)

Long‐Term Effects of Land Use and Cover Change and Dam Rupture on Ichthyofauna in a Neotropical Stream

International Review of Hydrobiology, EarlyView.
ABSTRACT This study evaluates land use and land cover (LULC) changes and their impacts on the fish community of a neotropical stream in the Sorocaba River basin, Brazil, from 2006 to 2023. The watershed experienced landscape changes over time, categorized into four periods: rural interventions, urban interventions, restorative interventions, and post ...
Nícholas de P. Nicomedes, Thiago M. R. Santos, Luís G. N. de Carvalho, Beatriz C. G. Prieto, Camila S. Bento, Larissa L. M. Silva, Flavia C. de Paiva, Natalia S. Alves, Welber S. Smith   +8 more
wiley   +1 more source

Physics-constrained Active Learning for Soil Moisture Estimation and Optimal Sensor Placement [PDF]

arXiv
Soil moisture is a crucial hydrological state variable that has significant importance to the global environment and agriculture. Precise monitoring of soil moisture in crop fields is critical to reducing agricultural drought and improving crop yield.
arxiv  

A short history of the phosphorus index and Andrew Sharpley's contributions from inception through development and implementation

Journal of Environmental Quality, EarlyView.
Abstract In the 1980s, growing recognition of agricultural phosphorus (P) sources to surface water eutrophication led to scrutiny of animal feeding operations. In 1990, the USDA‐Natural Resources Conservation Service (NRCS) invited prominent scientists to find a solution. It was at an initial meeting that Dr. Andrew Sharpley suggested that P assessment
Deanna L. Osmond, Peter J. A. Kleinman, Frank Coale, Nathan O. Nelson, Carl H. Bolster, Josh McGrath   +5 more
wiley   +1 more source

Identification of salmon redds using RPV‐based imagery produces comparable estimates to ground counts with high inter‐observer variability

River Research and Applications, Volume 39, Issue 1, Page 35-45, January 2023., 2023
Abstract An integral part of population monitoring within fisheries is ground‐based surveys of fish redds. Remotely piloted vehicles or drones (RPVs) could provide a complementary method but need verification due to a host of methodological differences. To compare methods, we counted summer Chinook redds (Oncorhynchus tshawytscha) (~6 m2 in size) using
Daniel S Auerbach, Alexander K Fremier
wiley   +1 more source

Nitrous oxide and nitric oxide fluxes differ from tea plantation and tropical forest soils after nitrogen addition

Frontiers in Forests and Global Change
South Asia is experiencing a rapid increase in nitrogen (N) pollution which is predicted to continue in the future. One of the possible implications is an increase in gaseous reactive N losses from soil, notably in the form of nitrous oxide (N2O) and ...
Galina Y. Toteva, Galina Y. Toteva, David Reay, Matthew R. Jones, Nicholas Cowan, Ajinkya Deshpande, Buddhika Weerakoon, Sarath Nissanka, Julia Drewer   +8 more
doaj   +1 more source

The importance of consensus science to managing phosphorus in the environment: SERA‐17 and the legacy of Andrew Sharpley

Journal of Environmental Quality, EarlyView.
Abstract Phosphorus (P) loss from agricultural systems to surface waters, and ultimately, eutrophication, presents a wicked problem requiring transdisciplinary solutions. The mission of SERA‐17 (Southern Extension and Research Advisory Information Exchange Group‐17) has been to address this problem by developing “Innovative Solutions to Minimize ...
Merrin L. Macrae, Peter J. A. Kleinman, Deanna Osmond, Amy Shober, Nathan Nelson   +4 more
wiley   +1 more source

Turbulence signatures of natural river morphology in four dimensions

River Research and Applications, Volume 39, Issue 1, Page 122-133, January 2023., 2023
Abstract Turbulent flow in natural river channels drives geophysical processes and exerts a fundamental influence on aquatic biota. An extensive range of turbulence properties have previously been synthesized into four categories or “dimensions” with ecological relevance: intensity, periodicity, orientation and scale (IPOS).
Giuditta Trinci, Gemma L. Harvey, Alexander James Henshaw, Walter Bertoldi   +3 more
wiley   +1 more source

A review of the development and implementation of the critical source area concept: A reflection of Andrew Sharpley's role in improving water quality

Journal of Environmental Quality, EarlyView.
Abstract Critical source areas (CSAs) are small areas of a field, farm, or catchment that account for most contaminant loss by having both a high contaminant availability and transport potential. Most work on CSAs has focused on phosphorus (P), largely through the work in the 1990s initiated by Dr.
Richard McDowell, Peter J. A. Kleinman, Philip Haygarth, Joshua M. McGrath, Douglas Smith, Louise Heathwaite, Antti Iho, Oscar Schoumans, David Nash   +8 more
wiley   +1 more source

Performance triggered adaptive model reduction for soil moisture estimation in precision irrigation [PDF]

arXiv
Accurate soil moisture information is crucial for developing precise irrigation control strategies to enhance water use efficiency. Soil moisture estimation based on limited soil moisture sensors is crucial for obtaining comprehensive soil moisture information when dealing with large-scale agricultural fields.
arxiv  

Phosphorus lability across diverse agricultural contexts with legacy sources

Journal of Environmental Quality, EarlyView.
Abstract The buffering of phosphorus (P) in the landscape delays management outcomes for water quality. If stored in labile form (readily exchangeable and bioavailable), P may readily pollute waters. We studied labile P and its intensity for >600 soils and sediments across seven study locations in the United States. Stocks of labile P were large enough
Zachary P. Simpson, Joshua Mott, Kyle Elkin, Anthony Buda, Joshua Faulkner, Cathleen Hapeman, Greg McCarty, Maryam Foroughi, W. Dean Hively, Kevin King, Will Osterholz, Chad Penn, Mark Williams, Lindsey Witthaus, Martin Locke, Ethan Pawlowski, Brent Dalzell, Gary Feyereisen, Christine Dolph, David Bjorneberg, Kossi Nouwakpo, Christopher W. Rogers, Isis Scott, Carl H. Bolster, Lisa Duriancik, Peter J. A. Kleinman   +25 more
wiley   +1 more source