Carrie Givens
Science and Products
Widespread use of the nitrification inhibitor nitrapyrin: Assessing benefits and costs to agriculture, ecosystems, and environmental health
Agricultural production and associated applications of nitrogen (N) fertilizers have increased dramatically in the last century, and current projections to 2050 show that demands will continue to increase as the human population grows. Applied in both organic and inorganic fertilizer forms, N is an essential nutrient in crop productivity....
Woodward, Emily; Edwards, Thea Margaret; Givens, Carrie E; Kolpin, Dana W.; Hladik, Michelle Comparison of specimen and image-based morphometrics in Cisco
Morphometric data from fish are typically generated using one of two methods: from direct measurements made on a specimen, or by extracting distances from a digital picture. We compared data on twelve morphometrics collected with these two different methods on the same collection of Cisco Coregonus artedi to assess the degree of bias in...
O'Malley, Brian; Schmitt, Joseph; Holden, Jeremy P.; Weidel, Brian C. Three-dimensional distribution of residence time metrics in the glaciated United States using metamodels trained on general numerical models
Residence time distribution (RTD) is a critically important characteristic of groundwater flow systems; however, it cannot be measured directly. RTD can be inferred from tracer data with analytical models (few parameters) or with numerical models (many parameters). The second approach permits more variation in system properties but is used less...
Starn, J. Jeffrey; Kauffman, Leon J.; Carlson, Carl S.; Reddy, James E.; Fienen, Michael N. Historic population estimates for bottlenose dolphins (Tursiops truncatus) in Aragua, Venezuela indicate monitoring need
This study reports historic capture-mark-recapture survival and abundance estimates of common bottlenose dolphins (Tursiops truncatus) based on photo-identification surveys of coastal Venezuela (along the Aragua coast between Turiamo Bay and Puerto Colombia). We used the most recent data available: dolphins identified by unique dorsal fin marks...
Cobarrubia-Russo, Sergio; Barber-Meyer, Shannon; Barreto, Guillermo R.; Molero-Lizarraga, Alimar Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters
Harmful algal blooms produce toxins that bioaccumulate in the food web and adversely affect humans, animals, and entire marine ecosystems. Blooms of the diatom Pseudo-nitzschia can produce domoic acid (DA), a toxin that most commonly causes neurological disease in endothermic animals, with cardiovascular effects that were first...
Moriarty, Megan E; Tinker, M Tim; Miller, Melissa; Tomoleoni, Joseph; Staedler, Michelle M.; Fujii, Jessica A.; Batac, Francesca I.; Dodd, Erin M.; Kudela, Raphael M.; Zubkousky-White, Vanessa; Johnson, Christine K. Gondwanic inheritance on the building of the western Central Andes (Domeyko Range, Chile): Structural and thermochronological approach (U-Pb and 40Ar-39Ar)
Tectonics inheritance controls the evolution of many orogens. To unravel the role of the Gondwanan heritage (late Paleozoic to Triassic) over the building of the Central Andes in northern Chile (Domeyko Range), we performed detrital U‐Pb zircon and 40Ar/39Ar muscovite geochronology along with structural analyses (kinematics and structural...
Espinoza, Mauricio; Oliveros, Veronica; Vasquez, Paulina; Giambiagi, Laura; Morgan, Leah E.; Gonzalez, Rodrigo; Solari, Luigi; Bechis, Florencia User Guide: Creating a WHISPers morbidity/mortality event
A step-by-step guide to “put a dot on the WHISPers map” by creating an event. Available to users assigned Partner User, Partner Manager, and Partner Administrator roles.
Miller, Kimberli J. Eroding Cascadia—Sediment and solute transport and landscape denudation in western Oregon and northwestern California
Riverine measurements of sediment and solute transport give empirical basin-scale estimates of bed-load, suspended-sediment, and silicate-solute fluxes for 100,000 km2 of northwestern California and western Oregon. This spatially explicit sediment budget shows the multifaceted control of geology and physiography on the rates and processes of...
O'Connor, Jim E.; Mangano, Joseph F.; Wise, Daniel R.; Roering, Joshua R. Upland burning and grazing as strategies to offset climate-change effects on wetlands
Wetland ecosystems perform a multitude of services valued by society and provide critical habitat for migratory birds and other wildlife. Despite their importance, wetlands have been lost to different local, regional, and global drivers. Remaining wetlands are extremely sensitive to changing temperature and precipitation regimes. Management of...
McKenna, Owen P.; Renton, David A.; Mushet, David M.; Edward S. DeKeyser Thermal constraints on energy balance, behaviour and spatial distribution of grizzly bears
1. Heat dissipation limit theory posits that energy available for growth and reproduction in endotherms is limited by their ability to dissipate heat. In mammals, endogenous heat production increases markedly during gestation and lactation, and thus female mammals may be subject to greater thermal constraints on energy expenditure than males. Such...
Rogers, Savannah A.; Robbins, Charlie T.; Mathewson, Paul D.; Carnahan, Anthony M.; van Manen, Frank T.; Haroldson, Mark A.; Porter, Warren P.; Rogers, Taylor R.; Soule, Terrence; Long, Ryan A.
Quality of surface water in Missouri, water year 2019
The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, designed and operates a network of monitoring stations on streams and springs throughout Missouri known as the Ambient Water-Quality Monitoring Network (AWQMN). During water year 2019 (October 1, 2018, through September 30, 2019), water-quality data were...
Kay, Robert T. Uranium(VI) attenuation in a carbonate-bearing oxic alluvial aquifer
Uranium minerals are commonly found in soils and sediment across the United States at an average concentration of 2–4 mg/kg. Uranium occurs in the environment primarily in two forms, the oxidized, mostly soluble uranium(VI) form, or the reduced, sparingly soluble reduced uranium(IV) form. Here we describe subsurface geochemical conditions...
Nolan, PJ; Bone, S; Campbell, Kate M.; Pannell, David; Healy, O; Stange, M; Bargar, J; Weber, KA