Search Results - "Johengen, Thomas"

Record-setting algal bloom in Lake Erie caused by agricultural and meteorological trends consistent with expected future conditions by Michalak, Anna M., Anderson, Eric J., Beletsky, Dmitry, Boland, Steven, Bosch, Nathan S., Bridgeman, Thomas B., Chaffin, Justin D., Cho, Kyunghwa, Confesor, Rem, Daloğlu, Irem, DePinto, Joseph V., Evans, Mary Anne, Fahnenstiel, Gary L., He, Lingli, Ho, Jeff C., Jenkins, Liza, Johengen, Thomas H., Kuo, Kevin C., LaPorte, Elizabeth, Liu, Xiaojian, McWilliams, Michael R., Moore, Michael R., Posselt, Derek J., Richards, R. Peter, Scavia, Donald, Steiner, Allison L., Verhamme, Ed, Wright, David M., Zagorski, Melissa A.

“…In 2011, Lake Erie experienced the largest harmful algal bloom in its recorded history, with a peak intensity over three times greater than any previously…”
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Ecophysiological Examination of the Lake Erie Microcystis Bloom in 2014: Linkages between Biology and the Water Supply Shutdown of Toledo, OH by Steffen, Morgan M., Davis, Timothy W., McKay, R. Michael L., Bullerjahn, George S., Krausfeldt, Lauren E., Stough, Joshua M.A., Neitzey, Michelle L., Gilbert, Naomi E., Boyer, Gregory L., Johengen, Thomas H., Gossiaux, Duane C., Burtner, Ashley M., Palladino, Danna, Rowe, Mark D., Dick, Gregory J., Meyer, Kevin A., Levy, Shawn, Boone, Braden E., Stumpf, Richard P., Wynne, Timothy T., Zimba, Paul V., Gutierrez, Danielle, Wilhelm, Steven W.

“…Annual cyanobacterial blooms dominated by Microcystis have occurred in western Lake Erie (U.S./Canada) during summer months since 1995. The production of…”
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Spatial and Temporal Trends in Lake Erie Hypoxia, 1987–2007 by Zhou, Yuntao, Obenour, Daniel R, Scavia, Donald, Johengen, Thomas H, Michalak, Anna M

“…Hypoxic conditions, defined as dissolved oxygen (DO) concentrations below 2 mg/L, are a regular summertime occurrence in Lake Erie, but the spatial extent has…”
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Cyanobacterial harmful algal blooms are a biological disturbance to Western Lake Erie bacterial communities by Berry, Michelle A., Davis, Timothy W., Cory, Rose M., Duhaime, Melissa B., Johengen, Thomas H., Kling, George W., Marino, John A., Den Uyl, Paul A., Gossiaux, Duane, Dick, Gregory J., Denef, Vincent J.

“…Summary Human activities are causing a global proliferation of cyanobacterial harmful algal blooms (CHABs), yet we have limited understanding of how these…”
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Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria by Stumpf, Richard P., Davis, Timothy W., Wynne, Timothy T., Graham, Jennifer L., Loftin, Keith A., Johengen, Thomas H., Gossiaux, Duane, Palladino, Danna, Burtner, Ashley

“…Using satellite imagery to quantify the spatial patterns of cyanobacterial toxins has several challenges. These challenges include the need for surrogate…”
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Establishing spatial and temporal patterns in Microcystis sediment seed stock viability and their relationship to subsequent bloom development in Western Lake Erie by Kitchens, Christine M, Johengen, Thomas H, Davis, Timothy W

“…This study assessed the distribution, abundance, and viability of pre- and post-overwintering Microcystis sediment seed stocks in Western Lake Erie and how…”
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Reduced forms of nitrogen are a driver of non-nitrogen-fixing harmful cyanobacterial blooms and toxicity in Lake Erie by Newell, Silvia E., Davis, Timothy W., Johengen, Thomas H., Gossiaux, Duane, Burtner, Ashley, Palladino, Danna, McCarthy, Mark J.

“…[Display omitted] •Proportions of non-nitrate N (TKN) have increased coincident with those of dissolved reactive P loading in Lake Erie.•The TKN proportion of…”
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The effect of single versus dual nutrient decreases on phytoplankton growth rates, community composition, and Microcystin concentration in the western basin of Lake Erie by Baer, Mikayla M., Godwin, Casey M., Johengen, Thomas H.

“…•Dual nutrient decreases resulted in negative growth rates for cyanobacteria during late season experiments, suggesting the possibly to diminish or shorten the…”
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Verrucomicrobia are prevalent in north-temperate freshwater lakes and display class-level preferences between lake habitats by Chiang, Edna, Schmidt, Marian L, Berry, Michelle A, Biddanda, Bopaiah A, Burtner, Ashley, Johengen, Thomas H, Palladino, Danna, Denef, Vincent J

“…The bacterial phylum Verrucomicrobia was formally described two decades ago and originally believed to be a minor member of many ecosystems; however, it is now…”
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Changing Ecosystem Dynamics in the Laurentian Great Lakes: Bottom-Up and Top-Down Regulation by BUNNELL, DAVID B., BARBIERO, RICHARD P., LUDSIN, STUART A., MADENJIAN, CHARLES P., WARREN, GLENN J., DOLAN, DAVID M., BRENDEN, TRAVIS O., BRILAND, RUTH, GORMAN, OWEN T., HE, JI X., JOHENGEN, THOMAS H., LANTRY, BRIAN F., LESHT, BARRY M., NALEPA, THOMAS F., RILEY, STEPHEN C., RISENG, CATHERINE M., TRESKA, TED J., TSEHAYE, IYOB, WALSH, MAUREEN G., WARNER, DAVID M., WEIDEL, BRIAN C.

“…Understanding the relative importance of top-down and bottom-up regulation of ecosystem structure is a fundamental ecological question, with implications for…”
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Vertical distributions of blooming cyanobacteria populations in a freshwater lake from LIDAR observations by Moore, Timothy S., Churnside, James H., Sullivan, James M., Twardowski, Michael S., Nayak, Aditya R., McFarland, Malcolm N., Stockley, Nicole D., Gould, Richard W., Johengen, Thomas H., Ruberg, Steven A.

“…The vertical distributions of freshwater cyanobacteria populations are important to plankton community structure, ecology and for influencing water column…”
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A space-time geostatistical model for probabilistic estimation of harmful algal bloom biomass and areal extent by Fang, Shiqi, Del Giudice, Dario, Scavia, Donald, Binding, Caren E., Bridgeman, Thomas B., Chaffin, Justin D., Evans, Mary Anne, Guinness, Joseph, Johengen, Thomas H., Obenour, Daniel R.

“…Harmful algal blooms (HABs) have been increasing in intensity worldwide, including the western basin of Lake Erie. Substantial efforts have been made to track…”
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Correction: Verrucomicrobia are prevalent in north-temperate freshwater lakes and display class-level preferences between lake habitats by Chiang, Edna, Schmidt, Marian L, Berry, Michelle A, Biddanda, Bopaiah A, Burtner, Ashley, Johengen, Thomas H, Palladino, Danna, Denef, Vincent J

“…[This corrects the article DOI: 10.1371/journal.pone.0195112.]…”
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Heterotrophic Bacteria Dominate Catalase Expression during Microcystis Blooms by Smith, Derek J, Berry, Michelle A, Cory, Rose M, Johengen, Thomas H, Kling, George W, Davis, Timothy W, Dick, Gregory J

“…In the oligotrophic oceans, key autotrophs depend on "helper" bacteria to reduce oxidative stress from hydrogen peroxide (H O ) in the extracellular…”
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Recent Patterns in Lake Erie Phosphorus and Chlorophyll a Concentrations in Response to Changing Loads by Rowland, Freya E, Stow, Craig A, Johengen, Thomas H, Burtner, Ashley M, Palladino, Danna, Gossiaux, Duane C, Davis, Timothy W, Johnson, Laura T, Ruberg, Steve

“…Despite the initial success of extensive efforts to reduce phosphorus (P) loading to Lake Erie as a part of the Great Lakes Water Quality Agreement, Lake Erie…”
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Tracking cyanobacteria blooms: Do different monitoring approaches tell the same story? by Bertani, Isabella, Steger, Cara E., Obenour, Daniel R., Fahnenstiel, Gary L., Bridgeman, Thomas B., Johengen, Thomas H., Sayers, Michael J., Shuchman, Robert A., Scavia, Donald

“…Cyanobacteria blooms are a major environmental issue worldwide. Our understanding of the biophysical processes driving cyanobacterial proliferation and the…”
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Probabilistic forecast of microcystin toxin using satellite remote sensing, in situ observations and numerical modeling by Liu, Qianqian, Rowe, Mark D., Anderson, Eric J., Stow, Craig A., Stumpf, Richard P., Johengen, Thomas H.

“…Lake Erie has experienced a resurgence of cyanobacterial harmful algal blooms (CHABs) since the early 2000's dominated by Microcystis aeruginosa, which produce…”
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Are Oligotypes Meaningful Ecological and Phylogenetic Units? A Case Study of Microcystis in Freshwater Lakes by Berry, Michelle A, White, Jeffrey D, Davis, Timothy W, Jain, Sunit, Johengen, Thomas H, Dick, Gregory J, Sarnelle, Orlando, Denef, Vincent J

“…Oligotyping is a computational method used to increase the resolution of marker gene microbiome studies. Although oligotyping can distinguish highly similar…”
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An assessment of a biosensor system for the quantification of microcystins in freshwater cyanobacterial blooms by Chaffin, Justin D, Barker, Katelyn B, Bickman, Sarah R, Bratton, John F, Bridgeman, Thomas B, Bhatia, Mudit, Buchholz, Seth D, Bullerjahn, George S, Johengen, Thomas H, Kang, Dae-Wook, Lewis, Gregory G, Lochhead, Michael J, Macdonald, Brooks M, Petrou, Cassandra L, Platz, Michelle, Purcell, Heidi, Roser, Jack, Seo, Youngwoo, Siddiquee, Mashuk, Snyder, Brenda, Taylor, Autumn T, Verhamme, Edward M, Westrick, Judy A

“…Microcystin-producing cyanobacterial blooms are a global issue threatening drinking water supplies and recreation on lakes and beaches. Direct measurement of…”
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Considerations in Harmful Algal Bloom Research and Monitoring: Perspectives From a Consensus-Building Workshop and Technology Testing by Stauffer, Beth A., Bowers, Holly A., Buckley, Earle, Davis, Timothy W., Johengen, Thomas H., Kudela, Raphael, McManus, Margaret A., Purcell, Heidi, Smith, G. Jason, Vander Woude, Andrea, Tamburri, Mario N.

“…Recurrent blooms of harmful algae and cyanobacteria (HABs) plague many coastal and inland waters throughout the USA and have significant socioeconomic impacts…”
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