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- Climate change (2)
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- AAP community composition (1)
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Articles 1 - 16 of 16
Full-Text Articles in Marine Biology
Physical Drivers Facilitating A Toxigenic Cyanobacterial Bloom In A Major Great Lakes Tributary, Paul G. Matson, Gregory L. Boyer, Thomas B. Bridgeman, George S. Bullerjahn, Douglas D. Kane, Robert M.L. Mckay, Katelyn M. Mckindles, Heather A. Raymond, Brenda K. Snyder, Richard P. Stumpf, Timothy W. Davis
Physical Drivers Facilitating A Toxigenic Cyanobacterial Bloom In A Major Great Lakes Tributary, Paul G. Matson, Gregory L. Boyer, Thomas B. Bridgeman, George S. Bullerjahn, Douglas D. Kane, Robert M.L. Mckay, Katelyn M. Mckindles, Heather A. Raymond, Brenda K. Snyder, Richard P. Stumpf, Timothy W. Davis
Great Lakes Institute for Environmental Research Publications
The Maumee River is the primary source for nutrients fueling seasonal Microcystis-dominated blooms in western Lake Erie's open waters though such blooms in the river are infrequent. The river also serves as source water for multiple public water systems and a large food services facility in northwest Ohio. On 20 September 2017, an unprecedented bloom was reported in the Maumee River estuary within the Toledo metropolitan area, which triggered a recreational water advisory. Here we (1) explore physical drivers likely contributing to the bloom's occurrence, and (2) describe the toxin concentration and bacterioplankton taxonomic composition. A historical analysis using 10-years …
Dissolved Microcystin Release Coincident With Lysis Of A Bloom Dominated By Microcystis Spp. In Western Lake Erie Attributed To A Novel Cyanophage, Katelyn M. Mckindles, Makayla A. Manes, Jonathan R. Demarco, Andrew Mcclure, R. Michael Mckay, Timothy W. Davis, George S. Bullerjahn
Dissolved Microcystin Release Coincident With Lysis Of A Bloom Dominated By Microcystis Spp. In Western Lake Erie Attributed To A Novel Cyanophage, Katelyn M. Mckindles, Makayla A. Manes, Jonathan R. Demarco, Andrew Mcclure, R. Michael Mckay, Timothy W. Davis, George S. Bullerjahn
Great Lakes Institute for Environmental Research Publications
Western Lake Erie (Laurentian Great Lakes) is prone to annual cyano- bacterial harmful algal blooms (cHABs) dominated by Microcystis spp. that often yield microcystin toxin concentrations exceeding the federal EPA recreational con-tact advisory of 8 μg liter-1. In August 2014, microcystin levels were detected in fin-ished drinking water above the World Health Organization 1.0 μg liter-1 threshold for consumption, leading to a 2-day disruption in the supply of drinking water for >400,000 residents of Toledo, Ohio (USA). Subsequent metatranscriptomic analysis of the 2014 bloom event provided evidence that release of toxin into the water sup-ply was likely caused by cyanophage …
Mimicking Transgenerational Signals Of Future Stress: Thermal Tolerance Of Juvenile Chinook Salmon Is More Sensitive To Elevated Rearing Temperature Than Exogenously Increased Egg Cortisol, Theresa R. Warriner, Christina A.D. Semeniuk, Trevor E. Pitcher, Daniel D. Heath, Oliver P. Love
Mimicking Transgenerational Signals Of Future Stress: Thermal Tolerance Of Juvenile Chinook Salmon Is More Sensitive To Elevated Rearing Temperature Than Exogenously Increased Egg Cortisol, Theresa R. Warriner, Christina A.D. Semeniuk, Trevor E. Pitcher, Daniel D. Heath, Oliver P. Love
Great Lakes Institute for Environmental Research Publications
Elevated temperatures resulting from climate change are expected to disproportionately affect ectotherms given their biological function has a direct link to environmental temperature. Thus, as climate change leads to rapid increases in water temperatures in rivers, aquatic ectotherms, such as fish may be highly impacted. Organisms can respond to these stressors through flexible and rapid phenotypic change induced via developmental and/or transgenerational plasticity. In oviparous species, gravid females may translate environmental stress across generations via increased exposure of eggs to maternally derived glucocorticoids (i.e., maternal stress), which has been shown to result in diverse phenotypic effects in offspring. Recent studies …
Comparing Temporal Patterns In Body Condition Of Ringed Seals Living Within Their Core Geographic Range With Those Living At The Edge, Steven H. Ferguson, David J. Yurkowski, Brent G. Young, Aaron T. Fisk, Derek C.G. Muir, Xinhua Zhu, Gregory W. Thiemann
Comparing Temporal Patterns In Body Condition Of Ringed Seals Living Within Their Core Geographic Range With Those Living At The Edge, Steven H. Ferguson, David J. Yurkowski, Brent G. Young, Aaron T. Fisk, Derek C.G. Muir, Xinhua Zhu, Gregory W. Thiemann
Great Lakes Institute for Environmental Research Publications
Ecological theory suggests that demographic responses by populations to environmental change vary depending on whether individuals inhabit central or peripheral regions within the species’ geographic range. Here, we tested this prediction by comparing a population of ringed seals Pusa hispida located at high latitudes as part of their core range (core) with a population located at the southern extremity of their range (peripheral). First, we compared the two regions’ environmental trends in timing of sea-ice breakup and freeze-up, open-water duration and the North Atlantic Oscillation (NAO). We found that the core region shifted to progressively warmer conditions in the early …
Foraging Tactics In Dynamic Sea-Ice Habitats Affect Individual State In A Long-Ranging Seabird, Arnaud Tarroux, Yves Cherel, Per Fauchald, Akiko Kato, Oliver P. Love, Yan Ropert-Coudert, Gunnar Spreen, Øystein Varpe, Henri Weimerskirch, Nigel G. Yoccoz, Sandrine Zahn, Sébastien Descamps
Foraging Tactics In Dynamic Sea-Ice Habitats Affect Individual State In A Long-Ranging Seabird, Arnaud Tarroux, Yves Cherel, Per Fauchald, Akiko Kato, Oliver P. Love, Yan Ropert-Coudert, Gunnar Spreen, Øystein Varpe, Henri Weimerskirch, Nigel G. Yoccoz, Sandrine Zahn, Sébastien Descamps
Great Lakes Institute for Environmental Research Publications
Individual heterogeneity in diet and foraging behaviour is common in wild animal populations, and can be a strong determinant of how populations respond to environmental changes. Within populations, variation in foraging behaviour and the occurrence of individual tactics in relation to resources distribution can help explain differences in individual fitness, and ultimately identify important factors affecting population dynamics. We examined how foraging behaviour and habitat during the breeding period related to the physiological state of a long-ranging seabird adapted to sea ice, the Antarctic petrel Thalassoica antarctica. Firstly, using GPS tracking and state-switching movement modelling (hidden Markov models) on 124 …
Identification Of Predation Events In Wild Fish Using Novel Acoustic Transmitters, Amy A. Weinz, Jordan K. Matley, Natalie V. Klinard, Aaron T. Fisk, Scott F. Colborne
Identification Of Predation Events In Wild Fish Using Novel Acoustic Transmitters, Amy A. Weinz, Jordan K. Matley, Natalie V. Klinard, Aaron T. Fisk, Scott F. Colborne
Great Lakes Institute for Environmental Research Publications
Background: Acoustic telemetry is a commonly used tool to gain knowledge about aquatic animal ecology through the study of their movements. In telemetry studies researchers must make inferences regarding the movements and the fates of tagged animals. Until recently, predation has been inferred in telemetry data using a variety of methods including abrupt changes in movement patterns or habitat use. An acoustic telemetry transmitter has been developed to detect predation events of tagged animals, and while they have performed well in controlled laboratory trials, literature regarding the application of these novel transmitters in field settings is limited. The objective of …
Community Dynamics And Function Of Algae And Bacteria During Winter In Central European Great Lakes, George S. Bullerjahn, Robert Michael L. Mckay, Gábor Bernát, Ondřej Prášil, Lajos Vörös, Károly Pálffy, Nóra Tugyi, Boglárka Somogyi
Community Dynamics And Function Of Algae And Bacteria During Winter In Central European Great Lakes, George S. Bullerjahn, Robert Michael L. Mckay, Gábor Bernát, Ondřej Prášil, Lajos Vörös, Károly Pálffy, Nóra Tugyi, Boglárka Somogyi
Great Lakes Institute for Environmental Research Publications
Abundant phytoplankton and bacteria were identified by microscopy and high-throughput 16S rRNA tag Illumina sequencing of samples from water- and ice phases collected during winter at two central European Great Lakes, Balaton and Fertő (Neusiedlersee). Bacterial reads at all sites were dominated (>85%) by Bacteroidetes and Proteobacteria. Amongst phototrophs, microscopy and 16S sequencing revealed that both phytoplankton and cyanobacteria were represented, with a median of 1500 cyanobacterial sequence reads amongst 13 samples analyzed. The sequence analysis compared replicate Balaton and Fertő ice and water samples with an outgroup from three Hungarian soda lakes. In particular, both water and ice …
Erratum For Piwosz Et Al., “Light And Primary Production Shape Bacterial Activity And Community Composition Of Aerobic Anoxygenic Phototrophic Bacteria In A Microcosm Experiment”, Kasia Piwosz, Ana Vrdoljak, Thijs Frenken, Juan Manuel Gonzalez-Olalla, Danijela Šantić, R. Michael Mckay, Kristian Spilling, Lior Guttman, Petr Znachor, Izabela Mujakić, Lívia Kolesár Fecskeová, Luca Zoccarato, Martina Hanusová, Andrea Pessina, Tom Reich, Hans Peter Grossart, Michal Koblížek
Erratum For Piwosz Et Al., “Light And Primary Production Shape Bacterial Activity And Community Composition Of Aerobic Anoxygenic Phototrophic Bacteria In A Microcosm Experiment”, Kasia Piwosz, Ana Vrdoljak, Thijs Frenken, Juan Manuel Gonzalez-Olalla, Danijela Šantić, R. Michael Mckay, Kristian Spilling, Lior Guttman, Petr Znachor, Izabela Mujakić, Lívia Kolesár Fecskeová, Luca Zoccarato, Martina Hanusová, Andrea Pessina, Tom Reich, Hans Peter Grossart, Michal Koblížek
Great Lakes Institute for Environmental Research Publications
No abstract provided.
Light And Primary Production Shape Bacterial Activity And Community Composition Of Aerobic Anoxygenic Phototrophic Bacteria In A Microcosm Experiment, Kasia Piwosz, Ana Vrdoljak, Thijs Frenken, Juan Manuel González-Olalla, Danijela Šantić, R. Michael Mckay, Kristian Spilling, Lior Guttman, Petr Znachor, Izabela Mujakić, Lívia Kolesár Fecskeová, Luca Zoccarato, Martina Hanusová, Andrea Pessina, Tom Reich, Hans Peter Grossart, Michal Koblížek
Light And Primary Production Shape Bacterial Activity And Community Composition Of Aerobic Anoxygenic Phototrophic Bacteria In A Microcosm Experiment, Kasia Piwosz, Ana Vrdoljak, Thijs Frenken, Juan Manuel González-Olalla, Danijela Šantić, R. Michael Mckay, Kristian Spilling, Lior Guttman, Petr Znachor, Izabela Mujakić, Lívia Kolesár Fecskeová, Luca Zoccarato, Martina Hanusová, Andrea Pessina, Tom Reich, Hans Peter Grossart, Michal Koblížek
Great Lakes Institute for Environmental Research Publications
Phytoplankton is a key component of aquatic microbial communities, and metabolic coupling between phytoplankton and bacteria determines the fate of dissolved organic carbon (DOC). Yet, the impact of primary production on bacterial activity and community composition remains largely unknown, as, for example, in the case of aerobic anoxygenic phototrophic (AAP) bacteria that utilize both phytoplankton-derived DOC and light as energy sources. Here, we studied how reduction of primary production in a natural freshwater community affects the bacterial community composition and its activity, focusing primarily on AAP bacteria. The bacterial respiration rate was the lowest when photosynthesis was reduced by direct …
Bloom Announcement: An Early Autumn Cyanobacterial Bloom Co-Dominated By Aphanizomenon Flos-Aquae And Planktothrix Agardhii In An Agriculturally-Influenced Great Lakes Tributary (Thames River, Ontario, Canada), R. Michael Mckay, Thijs Frenken, Ngan Diep, William R. Cody, Sophie Crevecoeur, Alice Dove, Kenneth G. Drouillard, Xavier Ortiz, Jason Wintermute, Arthur Zastepa
Bloom Announcement: An Early Autumn Cyanobacterial Bloom Co-Dominated By Aphanizomenon Flos-Aquae And Planktothrix Agardhii In An Agriculturally-Influenced Great Lakes Tributary (Thames River, Ontario, Canada), R. Michael Mckay, Thijs Frenken, Ngan Diep, William R. Cody, Sophie Crevecoeur, Alice Dove, Kenneth G. Drouillard, Xavier Ortiz, Jason Wintermute, Arthur Zastepa
Great Lakes Institute for Environmental Research Publications
No abstract provided.
The Complicated And Confusing Ecology Of Microcystis Blooms, Steven W. Wilhelm, George S. Bullerjahn, R. Michael L. Mckay
The Complicated And Confusing Ecology Of Microcystis Blooms, Steven W. Wilhelm, George S. Bullerjahn, R. Michael L. Mckay
Great Lakes Institute for Environmental Research Publications
Blooms of the toxin-producing cyanobacterium Microcystis are increasing globally, leading to the loss of ecosystem services, threats to human health, as well as the deaths of pets and husbandry animals. While nutrient availability is a well-known driver of algal biomass, the factors controlling “who” is present in fresh waters are more complicated. Microcystis possesses multiple strategies to adapt to temperature, light, changes in nutrient chemistry, herbivory, and parasitism that provide a selective advantage over its competitors. Moreover, its ability to alter ecosystem pH provides it a further advantage that helps exclude many of its planktonic competitors. While decades of nutrient …
Exposure To Exogenous Egg Cortisol Does Not Rescue Juvenile Chinook Salmon Body Size, Condition, Or Survival From The Effects Of Elevated Water Temperatures, Theresa R. Warriner, Christina A.D. Semeniuk, Trevor E. Pitcher, Oliver P. Love
Exposure To Exogenous Egg Cortisol Does Not Rescue Juvenile Chinook Salmon Body Size, Condition, Or Survival From The Effects Of Elevated Water Temperatures, Theresa R. Warriner, Christina A.D. Semeniuk, Trevor E. Pitcher, Oliver P. Love
Great Lakes Institute for Environmental Research Publications
Climate change is leading to altered temperature regimes which are impacting aquatic life, particularly for ectothermic fish. The impacts of environmental stress can be translated across generations through maternally derived glucocorticoids, leading to altered offspring phenotypes. Although these maternal stress effects are often considered negative, recent studies suggest this maternal stress signal may prepare offspring for a similarly stressful environment (environmental match). We applied the environmental match hypothesis to examine whether a prenatal stress signal can dampen the effects of elevated water temperatures on body size, condition, and survival during early development in Chinook salmon Oncorhynchus tshawytscha from Lake Ontario, …
Consequences Of Being Phenotypically Mismatched With The Environment: Rapid Muscle Ultrastructural Changes In Cold-Shocked Black-Capped Chickadees (Poecile Atricapillus), François Vézina, Emily Cornelius Ruhs, Erin S. O'Connor, Audrey Le Pogam, Lyette Régimbald, Oliver P. Love, Ana Gabriela Jimenez
Consequences Of Being Phenotypically Mismatched With The Environment: Rapid Muscle Ultrastructural Changes In Cold-Shocked Black-Capped Chickadees (Poecile Atricapillus), François Vézina, Emily Cornelius Ruhs, Erin S. O'Connor, Audrey Le Pogam, Lyette Régimbald, Oliver P. Love, Ana Gabriela Jimenez
Great Lakes Institute for Environmental Research Publications
Phenotypic flexibility has received considerable attention in the last decade; however, whereas many studies have reported amplitude of variation in phenotypic traits, much less attention has focused on the rate at which traits can adjust in response to sudden changes in the environment. We investigated whole animal and muscle phenotypic changes occurring in black-capped chickadees (Poecile atricapillus) acclimated to cold (-5°C) and warm (20°C) temperatures in the first 3 h following a 15°C temperature drop (over 3 h). Before the temperature change, cold-acclimated birds were consuming 95% more food, were carrying twice as much body fat, and had 23% larger …
Reframing Conservation Physiology To Be More Inclusive, Integrative, Relevant And Forward-Looking: Reflections And A Horizon Scan, Steven J. Cooke, Christine L. Madliger, Rebecca L. Cramp, John Beardall, Gary Burness, Steven L. Chown, Timothy D. Clark, Ben Dantzer, Erick De La Barrera, Nann A. Fangue, Craig E. Franklin, Andrea Fuller, Lucy A. Hawkes, Kevin R. Hultine, Kathleen E. Hunt, Oliver P. Love, Heath A. Macmillan, John W. Mandelman
Reframing Conservation Physiology To Be More Inclusive, Integrative, Relevant And Forward-Looking: Reflections And A Horizon Scan, Steven J. Cooke, Christine L. Madliger, Rebecca L. Cramp, John Beardall, Gary Burness, Steven L. Chown, Timothy D. Clark, Ben Dantzer, Erick De La Barrera, Nann A. Fangue, Craig E. Franklin, Andrea Fuller, Lucy A. Hawkes, Kevin R. Hultine, Kathleen E. Hunt, Oliver P. Love, Heath A. Macmillan, John W. Mandelman
Great Lakes Institute for Environmental Research Publications
Applying physiological tools, knowledge and concepts to understand conservation problems (i.e. conservation physiology) has becomecommonplace and confers an ability to understand mechanistic processes,develop predictive models and identify cause-and-effect relationships. Conservation physiology is making contributions to conservation solutions; the number of 'success stories' is growing, but there remain unexplored opportunities for which conservation physiology shows immense promise and has the potential to contribute to major advances in protecting and restoring biodiversity. Here, we consider howconservation physiology has evolved with a focus on reframing the discipline to be more inclusive and integrative.Using a 'horizon scan',we further exploreways in which conservation physiology can …
Changes In The Distribution Of Nesting Arctic Seaducks Are Not Strongly Related To Variation In Polar Bear Presence, Cody J. Dey, Christina A.D. Semeniuk, Samuel A. Iverson, H. Grant Gilchrist
Changes In The Distribution Of Nesting Arctic Seaducks Are Not Strongly Related To Variation In Polar Bear Presence, Cody J. Dey, Christina A.D. Semeniuk, Samuel A. Iverson, H. Grant Gilchrist
Great Lakes Institute for Environmental Research Publications
Contemporary climate change is predicted to expose some species to altered predation regimes. Losses of Arctic sea ice are causing polar bears to increasingly forage on colonial seaduck eggs in lieu of ice-based hunting of marine mammals. Although polar bear predation of bird eggs has now been widely documented, it is unclear whether this change in predator behavior is having population-level consequences for Arctic breeding birds. In this study, we tested whether changes in the number of common eider nests on 76 islands in Hudson Strait, Canada, were related to variation in polar bear presence. We found that polar bear …
Non-Invasive Method For Leptin Supplementation In Zebrafish (Danio Rerio), Regan Mcnamara
Non-Invasive Method For Leptin Supplementation In Zebrafish (Danio Rerio), Regan Mcnamara
Williams Honors College, Honors Research Projects
I tested the hypothesis that recombinant leptin protein can be introduced to zebrafish in vivo through non-invasive soaking in a solution containing the protein. One way to study various molecules’ effects in vivo is through intraperitoneal or intracerebroventricular injections during the embryonic or larval stage, which is invasive, difficult to administer, and can have a high mortality rate. 48 hours post fertilization (hpf) zebrafish were soaked in a His-tagged recombinant leptin protein solution at 10 nM and 100 nM concentrations (produced by Genscript). After soaking, zebrafish larvae were washed extensively to remove all recombinant protein on their exterior before homogenization. …