Search Results - "Needoba, Joseph A"

Effect of metformin exposure on growth and photosynthetic performance in the unicellular freshwater chlorophyte, Chlorella vulgaris by Cummings, Brittany M, Needoba, Joseph A, Peterson, Tawnya D

“…Many pharmaceuticals have negative effects on biota when released into the environment. For example, recent work has shown that the commonly prescribed…”
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Chemical Sensor Networks for the Aquatic Environment by Johnson, Kenneth S, Needoba, Joseph A, Riser, Stephen C, Showers, William J

“…A discussion of chemical sensor networks that can be deployed and operated in aquatic environments without human intervention for significant periods is…”
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Coupled Nitrogen and Oxygen Isotope Fractionation of Nitrate during Assimilation by Cultures of Marine Phytoplankton by Granger, Julie, Sigman, Daniel M., Needoba, Joseph A., Harrison, Paul J.

“…We report the first measurements of coupled nitrogen (N) and oxygen (O) isotopic variations of nitrate (NO3-) during its assimilation by laboratory cultures of…”
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Coastal upwelling supplies oxygen-depleted water to the Columbia River estuary by Roegner, G Curtis, Needoba, Joseph A, Baptista, António M

“…Low dissolved oxygen (DO) is a common feature of many estuarine and shallow-water environments, and is often attributed to anthropogenic nutrient enrichment…”
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Nitrogen Fixation by Unicellular Diazotrophic Cyanobacteria in the Temperate Oligotrophic North Pacific Ocean by Needoba, Joseph A., Rachel A. Foster, Carole Sakamoto, Zehr, Jonathan P., Johnson, Kenneth S.

“…N2 fixation has been understudied in marine environments outside of the subtropical and tropical oceans and where water temperatures are typically below…”
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Phosphorus Forms in Sediments of a River-Dominated Estuary by Watson, Sheree J., Cade-Menun, Barbara J., Needoba, Joseph A., Peterson, Tawnya D.

“…Estuaries are biologically productive transition zones between land and sea that play a vital role in transforming, recycling, and sequestering nutrients and…”
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Applications of Fluorescence Spectroscopy for Predicting Percent Wastewater in an Urban Stream by Goldman, Jami H, Rounds, Stewart A, Needoba, Joseph A

“…Dissolved organic carbon (DOC) is a significant organic carbon reservoir in many ecosystems, and its characteristics and sources determine many aspects of…”
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Infrastructure for collaborative science and societal applications in the Columbia River estuary by BAPTISTA, António M., SEATON, Charles, P. WILKIN, Michael, F. RISEMAN, Sarah, NEEDOBA, Joseph A., MAIER, David, TURNER, Paul J., KÄRNÄ, Tuomas, LOPEZ, Jesse E., HERFORT, Lydie, MEGLER, V.M., McNEIL, Craig, CRUMP, Byron C., PETERSON, Tawnya D., H. SPITZ, Yvette, SIMON, Holly M.

“…To meet societal needs, modem estuarine science needs to be interdisciplinary and collaborative, combine discovery with hypotheses testing, and be responsive…”
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Use of High-Resolution Pressure Nephelometry To Measure Gas Vesicle Collapse as a Means of Determining Growth and Turgor Changes in Planktonic Cyanobacteria by Dyer, Stuart W, Needoba, Joseph A

“…Previous work has demonstrated that the physical properties of intracellular bacterial gas vesicles (GVs) can be analyzed using pressure nephelometry. In…”
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Graphical coding data and operational guidance for implementation or modification of a LabVIEW®-based pHstat system for the cultivation of microalgae by Golda, Rachel L., Golda, Mark D., Peterson, Tawnya D., Needoba, Joseph A.

“…The influence of pH on phytoplankton physiology is an important facet of the body of research on ocean acidification. We provide data developed during the…”
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Determining indicator taxa across spatial and seasonal gradients in the Columbia River coastal margin by Fortunato, Caroline S, Eiler, Alexander, Herfort, Lydie, Needoba, Joseph A, Peterson, Tawnya D, Crump, Byron C

“…Bacterioplankton communities are deeply diverse and highly variable across space and time, but several recent studies demonstrate repeatable and predictable…”
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Widespread detection of Candidatus Accumulibacter phosphatis, a polyphosphate‐accumulating organism, in sediments of the Columbia River estuary by Watson, Sheree J., Needoba, Joseph A., Peterson, Tawnya D.

“…Summary Enhanced biological phosphorus removal (EBPR) exploits the metabolism of polyphosphate‐accumulating organisms (PAOs) to remove excess phosphorus (P)…”
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Determination of intracellular pH in phytoplankton using the fluorescent probe, SNARF, with detection by fluorescence spectroscopy by Golda-VanEeckhoutte, Rachel L., Roof, Lauren T., Needoba, Joseph A., Peterson, Tawnya D.

“…The maintenance of pH homeostasis is critical for a variety of cellular metabolic processes. Although ocean acidification is likely to influence cellular…”
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Stable nitrogen isotope dynamics of a mesoscale iron enrichment experiment in the NE Subarctic Pacific by Needoba, Joseph A., Marchetti, Adrian, Henry, Mike F., Harrison, Paul J., Wong, Chi-Shing, Keith Johnson, W., Pedersen, Tom F.

“…We report the response in the natural abundance of the stable isotopes of nitrogen ( δ 15N) during the Fe-enrichment experiment SERIES (Subarctic Ecosystem…”
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Hydrologic control of dissolved organic matter concentration and quality in a semiarid artificially drained agricultural catchment by Bellmore, Rebecca A., Harrison, John A., Needoba, Joseph A., Brooks, Erin S., Kent Keller, C.

“…Agricultural practices have altered watershed‐scale dissolved organic matter (DOM) dynamics, including in‐stream concentration, biodegradability, and total…”
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Development of an economical, autonomous pHstat system for culturing phytoplankton under steady state or dynamic conditions by Golda, Rachel L., Golda, Mark D., Hayes, Jacqueline A., Peterson, Tawnya D., Needoba, Joseph A.

“…Laboratory investigations of physiological processes in phytoplankton require precise control of experimental conditions. Chemostats customized to control and…”
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Fortnightly Tidal Modulations Affect Net Community Production in a Mesotidal Estuary by Nidzieko, Nicholas J, Needoba, Joseph A, Monismith, Stephen G, Johnson, Kenneth S

“…Optical in situ chemical sensors enable sampling intervals and durations that rival acoustic techniques used for measuring currents. Coupling these…”
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A model for community-driven development of best practices: the Ocean Observatories Initiative Biogeochemical Sensor Data Best Practices and User Guide by Palevsky, Hilary I., Clayton, Sophie, Benway, Heather, Maheigan, Mairead, Atamanchuk, Dariia, Battisti, Roman, Batryn, Jennifer, Bourbonnais, Annie, Briggs, Ellen M., Carvalho, Filipa, Chase, Alison P., Eveleth, Rachel, Fatland, Rob, Fogaren, Kristen E., Fram, Jonathan Peter, Hartman, Susan E., Le Bras, Isabela, Manning, Cara C. M., Needoba, Joseph A., Neely, Merrie Beth, Oliver, Hilde, Reed, Andrew C., Rheuban, Jennie E., Schallenberg, Christina, Walsh, Ian, Wingard, Christopher, Bauer, Kohen, Chen, Baoshan, Cuevas, Jose, Flecha, Susana, Horwith, Micah, Melendez, Melissa, Menz, Tyler, Rivero-Calle, Sara, Roden, Nicholas P., Steinhoff, Tobias, Trucco-Pignata, Pablo Nicolás, Vardaro, Michael F., Yoder, Meg

“…The field of oceanography is transitioning from data-poor to data-rich, thanks in part to increased deployment of in-situ platforms and sensors, such as those…”
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Red Waters of Myrionecta rubra are Biogeochemical Hotspots for the Columbia River Estuary with Impacts on Primary/Secondary Productions and Nutrient Cycles by Herfort, Lydie, Peterson, Tawnya D., Prahl, Fredrick G., McCue, Lee Ann, Needoba, Joseph A., Crump, Byron C., Roegner, G. Curtis, Campbell, Victoria, Zuber, Peter

“…The localized impact of blooms of the mixotrophic ciliate Myrionecta rubra in the Columbia River estuary during 2007-2010 was evaluated with biogeochemical,…”
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Nitrogen isotope fractionation in 12 species of marine phytoplankton during growth on nitrate by Needoba, Joseph A., Waser, N. A., Harrison, P. J., Calvert, S. E.

“…The nitrogen isotopic composition of 12 species of marine phytoplankton were determined by isotope ratio mass spectrometry in order to investigate isotope…”
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