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Articles 361 - 369 of 369
Full-Text Articles in Physical Sciences and Mathematics
First Records Of Perdita Bequaerti (Hymenopertera: Andrenidae) From New England, Justin C. Roch, Deicy Carolina Muñoz Agudelo, Lynn S. Adler, Joan Milam
First Records Of Perdita Bequaerti (Hymenopertera: Andrenidae) From New England, Justin C. Roch, Deicy Carolina Muñoz Agudelo, Lynn S. Adler, Joan Milam
Environmental Conservation Faculty Publication Series
We document the first New England records of the bee Perdita bequaerti Viereck. Perdita bequaerti is a specialist on Asteraceae flowers, especially Helianthus, and is native to much of eastern North America, where it is often associated with predominantly sandy habitats. Previous records indicated P. bequaerti reached the northeastern extent of its range in the state of New York, but in August 2019, during a survey of bees on Helianthus, we collected five specimens of P. bequaerti at two sites in western Massachusetts. Both sites were located on small-scale farms with abundant non-native Helianthus, on soils characteristic …
Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne
Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne
Articles
Ireland has one of the highest rates of emissions per capita in the world and its residential sector is responsible for approximately 10% of total national CO2 emissions. Therefore, reducing the CO2 emissions in this sector will play a decisive role in achieving EU targets of reducing emissions by 40% by 2030. To better inform decisions regarding retrofit of the existing building stock, this study proposes Optimum Insulation Thicknesses (OIT) for typical walls in 25 regions in Ireland. The calculation of OIT includes annual heat energy expenditure, CO2 emissions, and material payback period. The approach taken is based on Heating …
Ua12/13 Student Affairs - Sustainability, Wku Archives
Ua12/13 Student Affairs - Sustainability, Wku Archives
WKU Archives Collection Inventories
Records created by and about the Office of Sustainability.
Phylogenomics Reveals Ancient And Contemporary Gene Flow Contributing To The Evolutionary History Of Sea Ducks (Tribe Mergini), Philip Lavretsky, Robert E. Wilson, Sandra L. Talbot, Sarah A. Sonsthagen
Phylogenomics Reveals Ancient And Contemporary Gene Flow Contributing To The Evolutionary History Of Sea Ducks (Tribe Mergini), Philip Lavretsky, Robert E. Wilson, Sandra L. Talbot, Sarah A. Sonsthagen
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Insight into complex evolutionary histories continues to build through broad comparative phylogenomic and population genomic studies. In particular, there is a need to understand the extent and scale that gene flow contributes to standing genomic diversity and the role introgression has played in evolutionary processes such as hybrid speciation. Here, we investigate the evolutionary history of the Mergini tribe (sea ducks) by coupling multi-species comparisons with phylogenomic analyses of thousands of nuclear ddRAD-seq loci, including Z-sex chromosome and autosomal linked loci, and the mitogenome assayed across all extant sea duck species in North America. All sea duck species are strongly …
The 3H/3He Groundwater Age-Dating Method And Applications, Troy E. Gilmore, Mikaela L. Cherry, Didier Gastmans, Douglas Kip Solomon, Eric Christopher Humphrey
The 3H/3He Groundwater Age-Dating Method And Applications, Troy E. Gilmore, Mikaela L. Cherry, Didier Gastmans, Douglas Kip Solomon, Eric Christopher Humphrey
School of Natural Resources: Faculty Publications
Groundwater age-dating is an important tool for quantifying and managing water resources. Groundwater age is the elapsed time between recharge (at the land surface or water table) and the time when groundwater is sampled. If groundwater is sampled at the point of discharge from an aquifer, then the age represents the groundwater transit time. Groundwater that has recharged in recent decades is considered young groundwater. In many areas, the quality and quantity of young groundwater has been impacted by human activities and groundwater age-dating is useful for quantifying current and historical water and contaminant fluxes into and through aquifers. This …
Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow
Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow
Daugherty Water for Food Global Institute: Faculty Publications
There is a need to evaluate high surface nitrate concentrations across agricultural watersheds, both spatially and temporally, to increase understanding of source and timing of nitrogen loads in streams and rivers. Bazile Creek is a high-nitrate stream originating in the agriculturally intensive Bazile Groundwater Management Area of Eastern Nebraska, USA. It is a gaining stream that receives groundwater with high nitrate concentrations originating from nonpoint sources. The objective of this study was to determine spatial and temporal variability of baseflow nitrate concentrations in Bazile Creek and its tributaries and to relate this variability to watershed characteristics. Surface-water nitrate samples were …
The Great Plains Irrigation Experiment (Grainex), Eric Rappin, Rezaul Mahmood, Udaysankar S. Nair, Roger A. Pielke Sr., William Brown, Steven Oncley, Joshua Wurman, Karen Kosiba, Aaron Kaulfus, Chris Phillips, Emilee Lachenmeier, Joseph A. Santanello Jr., Edward Kim, Patricia Lawston-Parker
The Great Plains Irrigation Experiment (Grainex), Eric Rappin, Rezaul Mahmood, Udaysankar S. Nair, Roger A. Pielke Sr., William Brown, Steven Oncley, Joshua Wurman, Karen Kosiba, Aaron Kaulfus, Chris Phillips, Emilee Lachenmeier, Joseph A. Santanello Jr., Edward Kim, Patricia Lawston-Parker
School of Natural Resources: Faculty Publications
Extensive expansion in irrigated agriculture has taken place over the last half century. Due to increased irrigation and resultant land use land cover change, the central United States has seen a decrease in temperature and changes in precipitation during the second half of 20th century. To investigate the impacts of widespread commencement of irrigation at the beginning of the growing season and continued irrigation throughout the summer on local and regional weather, the Great Plains Irrigation Experiment (GRAINEX) was conducted in the spring and summer of 2018 in southeastern Nebraska. GRAINEX consisted of two, 15-day intensive observation periods. Observational platforms …
Challenges Of Brush Management Treatment Effectiveness In Southern Great Plains, United States, Rheinhardt Scholtz, Samuel D. Fuhlendorf, Daniel R. Uden, Brady W. Allred, Matthew O. Jones, David E. Naugle, Dirac Twidwell
Challenges Of Brush Management Treatment Effectiveness In Southern Great Plains, United States, Rheinhardt Scholtz, Samuel D. Fuhlendorf, Daniel R. Uden, Brady W. Allred, Matthew O. Jones, David E. Naugle, Dirac Twidwell
School of Natural Resources: Faculty Publications
Woodland expansion is a global challenge documented under varying degrees of disturbance, climate, and land ownership patterns. In North American rangelands, mechanical and chemical brush management practices and prescribed fire are frequently promoted by agencies and used by private landowners to reduce woody plant cover. We assess the distribution of agency-supported cost sharing of brush management (2000−2017) in the southern Great Plains, United States, and evaluate the longevity of treatment application. We test the general expectation that the current brush management paradigm in the southern Great Plains reduces woody plants and conserves rangeland resources at broad scales. This study represents …
Reconstruction Of Ancient Microbial Genomes From The Human Gut, M. C. Wibowo, Z. Yang, M. Borry, A. Hubner, K. D. Huang, B. T. Tierney, S. Zimmerman, F. Barajas-Olmos, C. Contreras-Cubas, H. Garcia-Ortiz, A. Martinez-Hernandez, J. M. Luber, K. Reinhard Et Al.
Reconstruction Of Ancient Microbial Genomes From The Human Gut, M. C. Wibowo, Z. Yang, M. Borry, A. Hubner, K. D. Huang, B. T. Tierney, S. Zimmerman, F. Barajas-Olmos, C. Contreras-Cubas, H. Garcia-Ortiz, A. Martinez-Hernandez, J. M. Luber, K. Reinhard Et Al.
School of Natural Resources: Faculty Publications
No abstract provided.