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- Individual variation (2)
- Laurentian Great Lakes (2)
Articles 31 - 60 of 106
Full-Text Articles in Life Sciences
Snow Buntings Maintain Winter-Level Cold Endurance While Migrating To The High Arctic, Audrey Le Pogam, Ryan S. O’Connor, Oliver P. Love, Justine Drolet, Lyette Régimbald, Gabrielle Roy, Marie Pier Laplante, Dominique Berteaux, Andrew Tam, François Vézina
Snow Buntings Maintain Winter-Level Cold Endurance While Migrating To The High Arctic, Audrey Le Pogam, Ryan S. O’Connor, Oliver P. Love, Justine Drolet, Lyette Régimbald, Gabrielle Roy, Marie Pier Laplante, Dominique Berteaux, Andrew Tam, François Vézina
Great Lakes Institute for Environmental Research Publications
Arctic breeding songbirds migrate early in the spring and can face winter environments requiring cold endurance throughout their journey. One such species, the snow bunting (Plectrophenax nivalis), is known for its significant thermogenic capacity. Empirical studies suggest that buntings can indeed maintain winter cold acclimatization into the migratory and breeding phenotypes when kept captive on their wintering grounds. This capacity could be advantageous not only for migrating in a cold environment, but also for facing unpredictable Arctic weather on arrival and during preparation for breeding. However, migration also typically leads to declines in the sizes of several body components linked …
Environmental Factors Affecting Chytrid (Chytridiomycota) Infection Rates On Planktothrix Agardhii, Katelyn M. Mckindles, Makayla A. Manes, R. Michael Mckay, Timothy W. Davis, George S. Bullerjahn
Environmental Factors Affecting Chytrid (Chytridiomycota) Infection Rates On Planktothrix Agardhii, Katelyn M. Mckindles, Makayla A. Manes, R. Michael Mckay, Timothy W. Davis, George S. Bullerjahn
Great Lakes Institute for Environmental Research Publications
Planktothrix agardhii dominates the cyanobacterial harmful algal bloom biomass in Sandusky Bay, Lake Erie (USA) from May until September. This filamentous cyanobacterium known parasites including the chytrid fungal species Rhizophydium sp. C02, which was previously isolated from this region. The purpose of our work has been to establish how parasitic interactions affect Planktothrix population dynamics during a bloom event. Samples analyzed from the 2015 to 2019 bloom seasons using quantitative PCR investigate the spatial and temporal prevalence of chytrid infections. Abiotic factors examined in lab include manipulating temperature (17-31°C), conductivity (0.226-1.225 mS/cm) and turbulence. Planktothrix-specific chytrids are present throughout the …
Comparison Of Approaches To Quantify Sars-Cov-2 In Wastewater Using Rt-Qpcr: Results And Implications From A Collaborative Inter-Laboratory Study In Canada, Alex H.S. Chik, Melissa B. Glier, Mark Servos, Chand S. Mangat, Xiao Li Pang, Yuanyuan Qiu, Patrick M. D'Aoust, Jean Baptiste Burnet, Robert Delatolla, Sarah Dorner, Qiudi Geng, John P. Giesy, Robert Mike Mckay, Michael R. Mulvey, Natalie Prystajecky, Nivetha Srikanthan, Yuwei Xie, Bernadette Conant
Comparison Of Approaches To Quantify Sars-Cov-2 In Wastewater Using Rt-Qpcr: Results And Implications From A Collaborative Inter-Laboratory Study In Canada, Alex H.S. Chik, Melissa B. Glier, Mark Servos, Chand S. Mangat, Xiao Li Pang, Yuanyuan Qiu, Patrick M. D'Aoust, Jean Baptiste Burnet, Robert Delatolla, Sarah Dorner, Qiudi Geng, John P. Giesy, Robert Mike Mckay, Michael R. Mulvey, Natalie Prystajecky, Nivetha Srikanthan, Yuwei Xie, Bernadette Conant
Great Lakes Institute for Environmental Research Publications
Detection of SARS-CoV-2 RNA in wastewater is a promising tool for informing public health decisions during the COVID-19 pandemic. However, approaches for its analysis by use of reverse transcription quantitative polymerase chain reaction (RT-qPCR) are still far from standardized globally. To characterize inter- and intra-laboratory variability among results when using various methods deployed across Canada, aliquots from a real wastewater sample were spiked with surrogates of SARS-CoV-2 (gamma-radiation inactivated SARS-CoV-2 and human coronavirus strain 229E [HCoV-229E]) at low and high levels then provided “blind” to eight laboratories. Concentration estimates reported by individual laboratories were consistently within a 1.0-log10 range for …
Limited Heat Tolerance In A Cold-Adapted Seabird: Implications Of A Warming Arctic, Emily S. Choy, Ryan S. O'Connor, H. Grant Gilchrist, Anna L. Hargreaves, Oliver P. Love, François Vézina, Kyle H. Elliott
Limited Heat Tolerance In A Cold-Adapted Seabird: Implications Of A Warming Arctic, Emily S. Choy, Ryan S. O'Connor, H. Grant Gilchrist, Anna L. Hargreaves, Oliver P. Love, François Vézina, Kyle H. Elliott
Great Lakes Institute for Environmental Research Publications
The Arctic is warming at approximately twice the global rate, with welldocumented indirect effects on wildlife. However, few studies have examined the direct effects of warming temperatures on Arctic wildlife, leaving the importance of heat stress unclear. Here, we assessed the direct effects of increasing air temperatures on the physiology of thick-billed murres (Uria lomvia), an Arctic seabird with reported mortalities due to heat stress while nesting on sun-exposed cliffs.We used flow-through respirometry to measure the response of body temperature, resting metabolic rate, evaporative water loss and evaporative cooling efficiency (the ratio of evaporative heat loss to metabolic heat production) …
The Changing Face Of Winter: Lessons And Questions From The Laurentian Great Lakes, Ted Ozersky, Andrew J. Bramburger, Ashley K. Elgin, Henry A. Vanderploeg, Jia Wang, Jay A. Austin, Hunter J. Carrick, Louise Chavarie, David C. Depew, Aaron T. Fisk, Stephanie E. Hampton, Elizabeth K. Hinchey, Rebecca L. North, Mathew G. Wells, Marguerite A. Xenopoulos, Maureen L. Coleman, Melissa B. Duhaime, Ayumi Fujisaki-Manome, R. Michael Mckay, Guy A. Meadows
The Changing Face Of Winter: Lessons And Questions From The Laurentian Great Lakes, Ted Ozersky, Andrew J. Bramburger, Ashley K. Elgin, Henry A. Vanderploeg, Jia Wang, Jay A. Austin, Hunter J. Carrick, Louise Chavarie, David C. Depew, Aaron T. Fisk, Stephanie E. Hampton, Elizabeth K. Hinchey, Rebecca L. North, Mathew G. Wells, Marguerite A. Xenopoulos, Maureen L. Coleman, Melissa B. Duhaime, Ayumi Fujisaki-Manome, R. Michael Mckay, Guy A. Meadows
Great Lakes Institute for Environmental Research Publications
Among its many impacts, climate warming is leading to increasing winter air temperatures, decreasing ice cover extent, and changing winter precipitation patterns over the Laurentian Great Lakes and their watershed. Understanding and predicting the consequences of these changes is impeded by a shortage of winter-period studies on most aspects of Great Lake limnology. In this review, we summarize what is known about the Great Lakes during their 3–6 months of winter and identify key open questions about the physics, chemistry, and biology of the Laurentian Great Lakes and other large, seasonally frozen lakes. Existing studies show that winter conditions have …
A Deep Dive Into Fat: Investigating Blubber Lipidomic Fingerprint Of Killer Whales And Humpback Whales In Northern Norway, Pierre Bories, Audun H. Rikardsen, Pim Leonards, Aaron T. Fisk, Sabrina Tartu, Emma F. Vogel, Jenny Bytingsvik, Pierre Blévin
A Deep Dive Into Fat: Investigating Blubber Lipidomic Fingerprint Of Killer Whales And Humpback Whales In Northern Norway, Pierre Bories, Audun H. Rikardsen, Pim Leonards, Aaron T. Fisk, Sabrina Tartu, Emma F. Vogel, Jenny Bytingsvik, Pierre Blévin
Great Lakes Institute for Environmental Research Publications
In cetaceans, blubber is the primary and largest lipid body reservoir. Our current understanding about lipid stores and uses in cetaceans is still limited, and most studies only focused on a single narrow snapshot of the lipidome. We documented an extended lipidomic fingerprint in two cetacean species present in northern Norway during wintertime. We were able to detect 817 molecular lipid species in blubber of killer whales (Orcinus orca) and humpback whales (Megaptera novaeangliae). The profiles were largely dominated by triradylglycerols in both species and, to a lesser extent, by other constituents including glycerophosphocholines, phosphosphingolipids, glycerophosphoethanolamines, and diradylglycerols. Through a …
A Landscape-Level Assessment Of Restoration Resource Allocation For The Eastern Monarch Butterfly, Rodrigo Solis-Sosa, Arne Mooers, Maxim Larrivée, Sean Cox, Christina A.D. Semeniuk
A Landscape-Level Assessment Of Restoration Resource Allocation For The Eastern Monarch Butterfly, Rodrigo Solis-Sosa, Arne Mooers, Maxim Larrivée, Sean Cox, Christina A.D. Semeniuk
Great Lakes Institute for Environmental Research Publications
The Monarch butterfly eastern population (Danaus plexippus) is in decline primarily due to habitat loss. Current habitat restoration programs focus on re-establishing milkweed, the primary food resource for Monarch caterpillars, in the central United States of America. However, individual components of the Monarch life cycle function as part of an integrated whole. Here we develop the MOBU-SDyM, a migration-wide systems dynamics model of the Monarch butterfly migratory cycle to explore alternative management strategies’ impacts. Our model offers several advances over previous efforts, considering complex variables such as dynamic temperature-dependent developmental times, dynamic habitat availability, and weather-related mortality across the entire …
Habitat Loss On The Breeding Grounds Is A Major Contributor To Population Declines In A Long-Distance Migratory Songbird, Michael T. Hallworth, Erin Bayne, Emily Mckinnon, Oliver Love, Junior A. Tremblay, Bruno Drolet, Jacques Ibarzabal, Steven Van Wilgenburg, Peter P. Marra
Habitat Loss On The Breeding Grounds Is A Major Contributor To Population Declines In A Long-Distance Migratory Songbird, Michael T. Hallworth, Erin Bayne, Emily Mckinnon, Oliver Love, Junior A. Tremblay, Bruno Drolet, Jacques Ibarzabal, Steven Van Wilgenburg, Peter P. Marra
Great Lakes Institute for Environmental Research Publications
Many migratory species are declining and for most, the proximate causes of their declines remain unknown. For many long-distance Neotropical migratory songbirds, it is assumed that habitat loss on breeding or non-breeding grounds is a primary driver of population declines. We integrated data collected from tracking technology, community science and remote sensing data to quantify migratory connectivity (MC), population trends and habitat loss. We quantified the correlation between forest change throughout the annual cycle and population declines of a long-distance migratory songbird, the Connecticut warbler (Oporornis agilis, observed decline: -8.99% yr -1). MC, the geographic link between populations during two …
Polar Bears Are Inefficient Predators Of Seabird Eggs, Patrick M. Jagielski, Cody J. Dey, H. Grant Gilchrist, Evan S. Richardson, Oliver P. Love, Christina A.D. Semeniuk
Polar Bears Are Inefficient Predators Of Seabird Eggs, Patrick M. Jagielski, Cody J. Dey, H. Grant Gilchrist, Evan S. Richardson, Oliver P. Love, Christina A.D. Semeniuk
Great Lakes Institute for Environmental Research Publications
Climate-mediated sea-ice loss is disrupting the foraging ecology of polar bears (Ursus maritimus) across much of their range. As a result, there have been increased reports of polar bears foraging on seabird eggs across parts of their range. Given that polar bears have evolved to hunt seals on ice, they may not be efficient predators of seabird eggs. We investigated polar bears' foraging performance on common eider (Somateria mollissima) eggs on Mitivik Island, Nunavut, Canada to test whether bear decision-making heuristics are consistent with expectations of optimal foraging theory. Using aerial-drones, we recorded multiple foraging bouts over 11 days, and …
Limited Heat Tolerance In An Arctic Passerine: Thermoregulatory Implications For Cold-Specialized Birds In A Rapidly Warming World, Ryan S. O'Connor, Audrey Le Pogam, Kevin G. Young, Francis Robitaille, Emily S. Choy, Oliver P. Love, Kyle H. Elliott, Anna L. Hargreaves, Dominique Berteaux, Andrew Tam, François Vézina
Limited Heat Tolerance In An Arctic Passerine: Thermoregulatory Implications For Cold-Specialized Birds In A Rapidly Warming World, Ryan S. O'Connor, Audrey Le Pogam, Kevin G. Young, Francis Robitaille, Emily S. Choy, Oliver P. Love, Kyle H. Elliott, Anna L. Hargreaves, Dominique Berteaux, Andrew Tam, François Vézina
Great Lakes Institute for Environmental Research Publications
Arctic animals inhabit some of the coldest environments on the planet and have evolved physiological mechanisms for minimizing heat loss under extreme cold. However, the Arctic is warming faster than the global average and how well Arctic animals tolerate even moderately high air temperatures (Ta) is unknown. Using flow-through respirometry, we investigated the heat tolerance and evaporative cooling capacity of snow buntings (Plectrophenax nivalis; ≈31 g, N = 42), a cold specialist, Arctic songbird. We exposed buntings to increasing Ta and measured body temperature (Tb), resting metabolic rate (RMR), rates of evaporative water loss (EWL), and evaporative cooling efficiency (the …
Isolation And Characterization Of Rhizophydiales (Chytridiomycota), Obligate Parasites Of Planktothrix Agardhii In A Laurentian Great Lakes Embayment, Katelyn M. Mckindles, Alejandro N. Jorge, R. Michael Mckay, Timothy W. Davis, George S. Bullerjahna
Isolation And Characterization Of Rhizophydiales (Chytridiomycota), Obligate Parasites Of Planktothrix Agardhii In A Laurentian Great Lakes Embayment, Katelyn M. Mckindles, Alejandro N. Jorge, R. Michael Mckay, Timothy W. Davis, George S. Bullerjahna
Great Lakes Institute for Environmental Research Publications
Planktothrix agardhii dominates the cyanobacterial harmful algal bloom community in Sandusky Bay, Lake Erie (USA), from May through September. This filamentous cyanobacterium is host to a known obligate parasite, the chytrid Rhizophydium sp. During the 2018 bloom season, by utilizing dilution and single-filament isolation techniques, 7 chytrid and 12 P. agardhii strains were isolated from Sandusky Bay. These 7 chytrids and a selection of P. agardhii hosts were then characterized with respect to infection rates. Infections by the isolated chytrids were specific to Planktothrix planktonic species and were not found on other filamentous cyanobacterial taxa present in the bay (Aphanizomenon …
No Common Pesticides Detected In Snow Buntings Utilizing A Farmland Landscape In Eastern Québec, Emily Cornelius Ruhs, Oliver P. Love, Louis Drainville, François Vézina
No Common Pesticides Detected In Snow Buntings Utilizing A Farmland Landscape In Eastern Québec, Emily Cornelius Ruhs, Oliver P. Love, Louis Drainville, François Vézina
Great Lakes Institute for Environmental Research Publications
Many species of migratory birds are declining worldwide, including throughout North America. Some of the most cited causes of decline are linked to climate change, urbanization, and growth in agriculture. Across eastern Canada, a number of insecticides and herbicides are commonly sprayed before and during the grain growing season to control pests and foliage competitors. During wintering and migration, a declining Arctic-breeding songbird, the snow bunting (Plectrophenax nivalis), utilizes open farmlands of southern Canada; therefore, this could be a period when the species is most exposed to these pesticides. We tested snow bunting tissues (blood and liver) for the 4 …
One Hundred Research Questions In Conservation Physiology For Generating Actionable Evidence To Inform Conservation Policy And Practice, Steven J. Cooke, Jordanna N. Bergman, Christine L. Madliger, Rebecca L. Cramp, John Beardall, Gary Burness, 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
One Hundred Research Questions In Conservation Physiology For Generating Actionable Evidence To Inform Conservation Policy And Practice, Steven J. Cooke, Jordanna N. Bergman, Christine L. Madliger, Rebecca L. Cramp, John Beardall, Gary Burness, 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
Environmental change and biodiversity loss are but two of the complex challenges facing conservation practitioners and policy makers. Relevant and robust scientific knowledge is critical for providing decision-makers with the actionable evidence needed to inform conservation decisions. In the Anthropocene, science that leads to meaningful improvements in biodiversity conservation, restoration and management is desperately needed. Conservation Physiology has emerged as a discipline that is well-positioned to identify the mechanisms underpinning population declines, predict responses to environmental change and test different in situ and ex situ conservation interventions for diverse taxa and ecosystems. Here we present a consensus list of 10 …
Researcher Perspectives On Challenges And Opportunities In Conservation Physiology Revealed From An Online Survey, Christine L. Madliger, Oliver P. Love, Vivian M. Nguyen, Neal R. Haddaway, Steven J. Cooke
Researcher Perspectives On Challenges And Opportunities In Conservation Physiology Revealed From An Online Survey, Christine L. Madliger, Oliver P. Love, Vivian M. Nguyen, Neal R. Haddaway, Steven J. Cooke
Great Lakes Institute for Environmental Research Publications
Conservation physiology represents a recently emerging arm of conservation science that applies physiological tools and techniques to understand and solve conservation issues. While a multi-disciplinary toolbox can only help to address the global biodiversity crisis, any field can face challenges while becoming established, particularly highly applied disciplines that require multi-stakeholder involvement. Gaining first-hand knowledge of the challenges that conservation physiologists are facing can help characterize the current state of the field and build a better foundation for determining how it can grow. Through an online survey of 468 scientists working at the intersection of physiology and conservation, we aimed to …
The Role Of Conservation Physiology In Mitigating Social-Ecological Traps In Wildlife-Provisioning Tourism: A Case Study Of Feeding Stingrays In The Cayman Islands, Christina A.D. Semeniuk
The Role Of Conservation Physiology In Mitigating Social-Ecological Traps In Wildlife-Provisioning Tourism: A Case Study Of Feeding Stingrays In The Cayman Islands, Christina A.D. Semeniuk
Great Lakes Institute for Environmental Research Publications
In feeding marine wildlife, tourists can impact animals in ways that are not immediately apparent (i.e. morbidity vs. mortality/reproductive failure). Inventorying the health status of wildlife with physiological indicators can provide crucial information on the immediate status of organisms and long-term consequences. However, because tourists are attempting to maximize their own satisfaction, encouraging the willingness to accept management regulations also requires careful consideration of the human dimensions of the system. Without such socio-ecological measures, the wildlife-tourism system may fall into a trap—a lose–lose situation where the pressure imposed by the social system (tourist expectations) has costs for the ecological system …
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 …