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Articles 1 - 30 of 40
Full-Text Articles in Life Sciences
Acid-Triggered Self-Assembled Egg White Protein-Coated Gold Nanoclusters For Selective Fluorescent Detection Of Fe3+, No2-, And Cysteine, Wenyan Li, Xiangping Wen, Hemiao Zhao, Wenjun Yan, John F. Trant, Yingqi Li
Acid-Triggered Self-Assembled Egg White Protein-Coated Gold Nanoclusters For Selective Fluorescent Detection Of Fe3+, No2-, And Cysteine, Wenyan Li, Xiangping Wen, Hemiao Zhao, Wenjun Yan, John F. Trant, Yingqi Li
Chemistry and Biochemistry Publications
Herein, we present a simple and economical synthesis for the first multianalyte probe able to selectively quantify the concentrations of Fe3+, NO2-, and cysteine. It comprises H+-triggered self-assembled gold nanoclusters (AuNCs@EW/H+, AuEHs), showing enhanced red fluorescence at 640 nm. The AuEH is a good fluorescent nanosensor for Fe3+ and NO2- with detection limits of 1.40 and 2.82 nM, respectively. Iron detection, through fluorescence quenching, occurs because of nanocluster aggregation elicited by the complexation of Fe3+ with amino acids on the surface of AuEH; nitrite detection likely proceeds through fluorescence quenching via the disassembly of the nanoclusters following irreversible oxidation by …
Preferential Reaching And End-State Comfort: How Task Demands Influence Motor Planning., Danielle Salters, P. Camila Rios, Eliza Ramsay, Sara Scharoun Benson
Preferential Reaching And End-State Comfort: How Task Demands Influence Motor Planning., Danielle Salters, P. Camila Rios, Eliza Ramsay, Sara Scharoun Benson
Human Kinetics Publications
No abstract provided.
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 …
A First Look At The Metabolic Rate Of Greenland Sharks (Somniosus Microcephalus) In The Canadian Arctic, Eric Ste-Marie, Yuuki Y. Watanabe, Jayson M. Semmens, Marianne Marcoux, Nigel E. Hussey
A First Look At The Metabolic Rate Of Greenland Sharks (Somniosus Microcephalus) In The Canadian Arctic, Eric Ste-Marie, Yuuki Y. Watanabe, Jayson M. Semmens, Marianne Marcoux, Nigel E. Hussey
Integrative Biology Publications
Metabolic rate is intricately linked to the ecology of organisms and can provide a framework to study the behaviour, life history, population dynamics, and trophic impact of a species. Acquiring measures of metabolic rate, however, has proven difficult for large water-breathing animals such as sharks, greatly limiting our understanding of the energetic lives of these highly threatened and ecologically important fish. Here, we provide the first estimates of resting and active routine metabolic rate for the longest lived vertebrate, the Greenland shark (Somniosus microcephalus). Estimates were acquired through field respirometry conducted on relatively large-bodied sharks (33–126 kg), including the largest …
Calling Songs Of Neotropical Katydids (Orthoptera: Tettigoniidae) From Panama, Hannah M. Ter Hofstede, Laurel B. Symes, Sharon J. Martinson, Tony Robillard, Paul Faure, Shyam Madhusudhana, Rachel A. Page
Calling Songs Of Neotropical Katydids (Orthoptera: Tettigoniidae) From Panama, Hannah M. Ter Hofstede, Laurel B. Symes, Sharon J. Martinson, Tony Robillard, Paul Faure, Shyam Madhusudhana, Rachel A. Page
Integrative Biology Publications
Understanding the ecology and evolution of animal communication systems requires detailed data on signal structure and variation across species. Here, we describe the male acoustic signals of 50 species of Neotropical katydids (Orthoptera: Tettigoniidae) from Panama, with the goal of providing data and recordings for future research on katydid communication, evolution, ecology, and conservation. Male katydids were recorded individually using an ultrasound-sensitive microphone and high-sampling rate data acquisition board to capture both audible and ultrasonic components of calls. Calls varied enormously in duration, temporal patterning, peak frequency, and bandwidth both across and within subfamilies. We confirm previous studies showing that …
An In Silico Approach To Enzymatic Synthesis Of Fucooligosaccharides Using Α-L-Fucosidase From Thermotoga Maritima, Emmanuel Pérez-Escalante, Luis Guillermo González-Olivares, Araceli Castañeda-Ovando, Alma Elizabeth Cruz-Guerrero, John F. Trant, Wendolyne López-Orozco, Luis Humberto Mendoza-Huizar, Sergio Alatorre-Santamaría
An In Silico Approach To Enzymatic Synthesis Of Fucooligosaccharides Using Α-L-Fucosidase From Thermotoga Maritima, Emmanuel Pérez-Escalante, Luis Guillermo González-Olivares, Araceli Castañeda-Ovando, Alma Elizabeth Cruz-Guerrero, John F. Trant, Wendolyne López-Orozco, Luis Humberto Mendoza-Huizar, Sergio Alatorre-Santamaría
Chemistry and Biochemistry Publications
Abstract: Fucooligosaccharides comprise the primary group of human milk oligosaccharides. Due to their beneficial properties, a series of synthetic methods have been proposed to obtain them. Enzy- matic methods show great promise, and α-L-fucosidase from Thermotoga maritima has emerged as a powerful catalyst for their production. Nonetheless, the enzyme’s limited substrate scope has de- layed its wider application. The present work aims to compare the relative reactivity of fucose, pNP-fucose, and ethyl-fucose, while also exploring the molecular interactions of these fucosyl-donors with the enzyme through a combination DFT and docking analysis. The HOMO-LUMO band gaps range from −7.14571 to −4.24429 …
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 …
Maternal And Embryonic Trace Element Concentrations And Stable Isotope Fractionation In The Smalleye Smooth-Hound (Mustelus Higmani), Juliana De Souza-Araujo, Ryan Andrades, Marcelo De Oliveira Lima, Nigel E. Hussey, Tommaso Giarrizzo
Maternal And Embryonic Trace Element Concentrations And Stable Isotope Fractionation In The Smalleye Smooth-Hound (Mustelus Higmani), Juliana De Souza-Araujo, Ryan Andrades, Marcelo De Oliveira Lima, Nigel E. Hussey, Tommaso Giarrizzo
Integrative Biology Publications
Here, we evaluate maternal offloading of 16 trace elements (Essential: Co, Cr, Cu, Fe, Mn, Ni, Se and Zn; Nonessential: Al, As, Ba, Cd, Hg, Pb, Tl and U) and determine mother-offspring isotopic fractionation of δ13C and δ15N in muscle and liver tissue of four pregnant Mustelus higmani and 18 associated embryos sampled from the Amazon Coast of Brazil. Embryo muscle tissue had significantly higher concentrations of most trace elements when compared to mothers, with the exception of Hg. Embryo liver accumulated more nonessential elements than muscle (n = 7 vs. 0, respectively), while the Se:Hg molar ratio was >1 …
A Mechanical Mechanism For Vitamin E Acetate In E-Cigarette/Vaping-Associated Lung Injury, Mitchell Dipasquale, Omotayo Gbadamosi, Michael H.L. Nguyen, Stuart R. Castillo, Brett W. Rickeard, Elizabeth G. Kelley, Michihiro Nagao, Drew Marquardt
A Mechanical Mechanism For Vitamin E Acetate In E-Cigarette/Vaping-Associated Lung Injury, Mitchell Dipasquale, Omotayo Gbadamosi, Michael H.L. Nguyen, Stuart R. Castillo, Brett W. Rickeard, Elizabeth G. Kelley, Michihiro Nagao, Drew Marquardt
Chemistry and Biochemistry Publications
Copyright © 2020 American Chemical Society. The outbreak of electronic-cigarette/vaping-Associated lung injury (EVALI) has made thousands ill. This lung injury has been attributed to a physical interaction between toxicants from the vaping solution and the pulmonary surfactant. In particular, studies have implicated vitamin E acetate as a potential instigator of EVALI. Pulmonary surfactant is vital to proper respiration through the mechanical processes of adsorption and interface stability to achieve and maintain low surface tension at the air-liquid interface. Using neutron spin echo spectroscopy, we investigate the impact of vitamin E acetate on the mechanical properties of two lipid-only pulmonary surfactant …
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 …
Detecting Mercury (Ii) And Thiocyanate Using “Turn-On” Fluorescence Of Graphene Quantum Dots, Faezeh Askari, Abbas Rahdar, Mohadeseh Dashti, John F. Trant
Detecting Mercury (Ii) And Thiocyanate Using “Turn-On” Fluorescence Of Graphene Quantum Dots, Faezeh Askari, Abbas Rahdar, Mohadeseh Dashti, John F. Trant
Chemistry and Biochemistry Publications
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg2+. Quenching was far less efficient with other similar heavy metals, Tl+, Pb2+ and Bi3+. Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This “turn-on” fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future. [Figure not available: see fulltext.].
The Synthesis Of Methotrexate-Loaded F127 Microemulsions And Their In Vivo Toxicity In A Rat Model, Abbas Rahdar, Mohammad Reza Hajinezhad, Sarah Nasri, Hamid Beyzaei, Mahmood Barani, John F. Trant
The Synthesis Of Methotrexate-Loaded F127 Microemulsions And Their In Vivo Toxicity In A Rat Model, Abbas Rahdar, Mohammad Reza Hajinezhad, Sarah Nasri, Hamid Beyzaei, Mahmood Barani, John F. Trant
Chemistry and Biochemistry Publications
Methotrexate (MTX) has been often formulated as nano and micro-emulsions, nominally to address its poor solubility and off-target effects. Nanoformulated MTX is universally reported to be a more efficacious anti-cancer agent than direct-dissolved drug; however, these investigations generally fail to screen for in vivo toxicity. This study aims to remedy this oversight. MTX was formulated as a standard Pluronic oil-in-water microemulsion with good drug encapsulation efficiency (73.0% ± 8.4). Preliminary in vitro free radical scavenging studies found that formulation reduces drug oxidation four-fold. The toxic effects of formulated and unformulated MTX were investigated in a Wistar rat model. Rats received …
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 …
Collective Behavior In Wild Zebrafish, Delia S. Shelton, Sierra G. Shelton, Danita K. Daniel, Manickam Raja, Anuradha Bhat, Robyn L. Tanguay, Dennis M. Higgs, Emília P. Martins
Collective Behavior In Wild Zebrafish, Delia S. Shelton, Sierra G. Shelton, Danita K. Daniel, Manickam Raja, Anuradha Bhat, Robyn L. Tanguay, Dennis M. Higgs, Emília P. Martins
Integrative Biology Publications
Anthropogenic change is expected to alter environments at alarming rates. To predict the impact of modified environments on social behavior, we must study the relationship between environmental features and collective behavior in a genetically tractable model, zebrafish (Danio rerio). Here, we conducted a field study to examine the relationship between salient environmental features and collective behavior in four populations of zebrafish. We found zebrafish in flowing water formed volatile groups, whereas those in still water had more consistent membership and leadership. Groups in fast-flowing water were large (up to 2000 fish) and tightly knit with short nearest neighbor distances, whereas …
Cannabinoids And Cannabinoid Receptors: The Story So Far, Fred Shahbazi, Victoria Grandi, Abhinandan Banerjee, John F. Trant
Cannabinoids And Cannabinoid Receptors: The Story So Far, Fred Shahbazi, Victoria Grandi, Abhinandan Banerjee, John F. Trant
Chemistry and Biochemistry Publications
Like most modern molecular biology and natural product chemistry, understanding cannabinoid pharmacology centers around molecular interactions, in this case, between the cannabinoids and their putative targets, the G-protein coupled receptors (GPCRs) cannabinoid receptor 1 (CB1) and cannabinoid receptor 2 (CB2). Understanding the complex structure and interplay between the partners in this molecular dance is required to understand the mechanism of action of synthetic, endogenous, and phytochemical cannabinoids. This review, with 91 references, surveys our understanding of the structural biology of the cannabinoids and their target receptors including both a critical comparison of the extant crystal structures and the computationally derived …
The Structures Of Polyunsaturated Lipid Bilayers By Joint Refinement Of Neutron And X-Ray Scattering Data, Drew Marquardt, Frederick A. Heberle, Jianjun Pan, Xiaolin Cheng, Georg Pabst, Thad A. Harroun, Norbert Kučerka, John Katsaras
The Structures Of Polyunsaturated Lipid Bilayers By Joint Refinement Of Neutron And X-Ray Scattering Data, Drew Marquardt, Frederick A. Heberle, Jianjun Pan, Xiaolin Cheng, Georg Pabst, Thad A. Harroun, Norbert Kučerka, John Katsaras
Chemistry and Biochemistry Publications
© 2020 Elsevier B.V. We present the detailed structural analysis of polyunsaturated fatty acid-containing phospholipids namely, 1-palmitoyl-2-docosahexaenoyl-sn-glycero-3-phosphocholine (PDPC) and 1-stearoyl-2-docosahexaenoyl-sn-glycero-3-phosphocholine (SDPC). A newly developed molecular dynamics (MD) simulation parsing scheme for lipids containing fatty acids with multiple double bonds was implemented into the scattering density profile (SDP) model to simultaneously refine differently contrasted neutron and X-ray scattering data. SDP analyses of scattering data at 30 °C yielded lipid areas of 71.1 Å2 and 70.4 Å2 for PDPC and SDPC bilayers, respectively, and a model free analysis of PDPC at 30 °C resulted in a lipid area of 72 Å2. In …
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 …
Density Dependence Mediates The Ecological Impact Of An Invasive Fish, Emma M. Deroy, Ryan Scott, Nigel E. Hussey, Hugh J. Macisaac
Density Dependence Mediates The Ecological Impact Of An Invasive Fish, Emma M. Deroy, Ryan Scott, Nigel E. Hussey, Hugh J. Macisaac
Integrative Biology Publications
Aim: The way in which habitat heterogeneity and predator density affect predator–prey dynamics, space use and prey risk are understudied aspects of foraging ecology, particularly for invasive species. Likewise, how an invasive species’ impact scales with its abundance is poorly understood. We used a model invasive species—lionfish (Pterois volitans)—to understand emergent multiple predator effects and influences of habitat heterogeneity on consumption rate and prey mortality risk. Location: Florida, USA. Methods: We considered effects of both predator and prey abundance on density-dependent impact. We used functional response methodology to quantify the per-capita effect of P. volitans, assessing concomitant influences of prey …
Differential Expression Of Glucose Transporters And Hexokinases In Prostate Cancer With A Neuroendocrine Gene Signature: A Mechanistic Perspective For 18 F-Fdg Imaging Of Psma-Suppressed Tumors, Martin K. Bakht, Jessica M. Lovnicki, Janice Tubman, Keith F. Stringer, Jonathan Chiaramonte, Michael R. Reynolds, Iulian Derecichei, Rosa Maria Ferraiuolo, Bre Anne Fifield, Dorota Lubanska, So Won Oh, Gi Jeong Cheon, Cheol Kwak, Chang Wook Jeong, Keon Wook Kang, John F. Trant, Colm Morrissey, Ilsa M. Coleman, Yuzhuo Wang, Hojjat Ahmadzadehfar
Differential Expression Of Glucose Transporters And Hexokinases In Prostate Cancer With A Neuroendocrine Gene Signature: A Mechanistic Perspective For 18 F-Fdg Imaging Of Psma-Suppressed Tumors, Martin K. Bakht, Jessica M. Lovnicki, Janice Tubman, Keith F. Stringer, Jonathan Chiaramonte, Michael R. Reynolds, Iulian Derecichei, Rosa Maria Ferraiuolo, Bre Anne Fifield, Dorota Lubanska, So Won Oh, Gi Jeong Cheon, Cheol Kwak, Chang Wook Jeong, Keon Wook Kang, John F. Trant, Colm Morrissey, Ilsa M. Coleman, Yuzhuo Wang, Hojjat Ahmadzadehfar
Chemistry and Biochemistry Publications
Although the incidence of de novo neuroendocrine prostate cancer (PC) is rare, recent data suggest that low expression of prostatespecific membrane antigen (PSMA) is associated with a spectrum of neuroendocrine hallmarks and androgen receptor (AR) suppression in PC. Previous clinical reports indicate that PCs with a phenotype similar to neuroendocrine tumors can be more amenable to imaging by 18F-FDG than by PSMA-targeting radioligands. In this study, we evaluated the association between neuroendocrine gene signature and 18F-FDG uptake-associated genes including glucose transporters (GLUTs) and hexokinases, with the goal of providing a genomic signature to explain the reported 18F-FDG avidity of PSMA …
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.
Bioacoustic Analyses Reveal That Bird Communities Recover With Forest Succession In Tropical Dry Forests, Kiirsti C. Owen, Amanda D. Melin, Fernando A. Campos, Linda M. Fedigan, Thomas W. Gillespie, Daniel J. Mennill
Bioacoustic Analyses Reveal That Bird Communities Recover With Forest Succession In Tropical Dry Forests, Kiirsti C. Owen, Amanda D. Melin, Fernando A. Campos, Linda M. Fedigan, Thomas W. Gillespie, Daniel J. Mennill
Integrative Biology Publications
With expanding anthropogenic disturbances to forests around the world, forest restoration is increasingly important for bird conservation. Restoration monitoring is critical for understanding how birds respond to forest regeneration and for assessing the effectiveness of restoration efforts. Using bioacoustic monitoring, we recorded bird communities during both dry and wet seasons at 62 sites along a chronosequence of tropical dry forests in the Área de Conservación Guanacaste in Costa Rica. Tropical dry forests rank among the globe’s most imperiled ecosystems, adding special urgency to their restoration and accompanying restoration monitoring. We found that bird species diversity, richness, and abundance increase with …
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 …
Population Genomic Response To Geographic Gradients By Widespread And Endemic Fishes Of The Arabian Peninsula, Joseph D. Dibattista, Pablo Saenz-Agudelo, Marek J. Piatek, Edgar Fernando Cagua, Brian W. Bowen, John Howard Choat, Luiz A. Rocha, Michelle R. Gaither, Jean Paul A. Hobbs, Tane H. Sinclair-Taylor, Jennifer H. Mcilwain, Mark A. Priest, Camrin D. Braun, Nigel E. Hussey, Steven T. Kessel, Michael L. Berumen
Population Genomic Response To Geographic Gradients By Widespread And Endemic Fishes Of The Arabian Peninsula, Joseph D. Dibattista, Pablo Saenz-Agudelo, Marek J. Piatek, Edgar Fernando Cagua, Brian W. Bowen, John Howard Choat, Luiz A. Rocha, Michelle R. Gaither, Jean Paul A. Hobbs, Tane H. Sinclair-Taylor, Jennifer H. Mcilwain, Mark A. Priest, Camrin D. Braun, Nigel E. Hussey, Steven T. Kessel, Michael L. Berumen
Integrative Biology Publications
Genetic structure within marine species may be driven by local adaptation to their environment, or alternatively by historical processes, such as geographic isolation. The gulfs and seas bordering the Arabian Peninsula offer an ideal setting to examine connectivity patterns in coral reef fishes with respect to environmental gradients and vicariance. The Red Sea is characterized by a unique marine fauna, historical periods of desiccation and isolation, as well as environmental gradients in salinity, temperature, and primary productivity that vary both by latitude and by season. The adjacent Arabian Sea is characterized by a sharper environmental gradient, ranging from extensive coral …
Gone With The Wind: Is Signal Timing In A Neotropical Katydid An Adaptive Response To Variation In Wind-Induced Vibratory Noise?, Estefania Velilla, Matías Muñoz, Nicol Quiroga, Laurel Symes, Hannah M. Ter Hofstede, Rachel A. Page, Ralph Simon, Jacintha Ellers, Wouter Halfwerk
Gone With The Wind: Is Signal Timing In A Neotropical Katydid An Adaptive Response To Variation In Wind-Induced Vibratory Noise?, Estefania Velilla, Matías Muñoz, Nicol Quiroga, Laurel Symes, Hannah M. Ter Hofstede, Rachel A. Page, Ralph Simon, Jacintha Ellers, Wouter Halfwerk
Integrative Biology Publications
Abstract: Wind, a major source of environmental noise, forces invertebrates that communicate with plant-borne vibrations to adjust their signaling when communicating in windy conditions. However, the strategies that animals use to reduce the impact of wind noise on communication are not well studied. We investigated the effects of wind on the production of tremulatory signals in the neotropical katydid Copiphora brevirostris. First, we recorded katydid signaling activity and natural wind variation in the field. Additionally, we exposed katydid couples during their most active signaling time period to artificial wind of different levels, and we recorded the number of tremulations produced …
Stretchable Ultrasheer Fabrics As Semitransparent Electrodes For Wearable Light-Emitting E-Textiles With Changeable Display Patterns, Yunyun Wu, Sara S. Mechael, Cecilia Lerma, R. Stephen Carmichael, Tricia Breen Carmichael
Stretchable Ultrasheer Fabrics As Semitransparent Electrodes For Wearable Light-Emitting E-Textiles With Changeable Display Patterns, Yunyun Wu, Sara S. Mechael, Cecilia Lerma, R. Stephen Carmichael, Tricia Breen Carmichael
Chemistry and Biochemistry Publications
Despite the development throughout human history of a wealth of textile materials and structures, the porous structures and non-planar surfaces of textiles are often viewed as problematic for the fabrication of wearable e-textiles and smart clothing. Here, we demonstrate a new textile-centric design paradigm in which we use the textile structure as an integral part of wearable device design. We coat the open framework structure of an ultrasheer knitted textile with a conformal gold film using solution-based metallization to form gold-coated ultrasheer electrodes that are highly conductive (3.6 ± 0.9 Ω/sq) and retain conductivity to 200% strain with R/R0 < 2. The ultrasheer electrodes produce wearable, highly stretchable light-emitting e-textiles that function to 200% strain. Stencil printing a wax resist provides patterned electrodes for patterned light emission; furthermore, incorporating soft-contact lamination produces light-emitting textiles that exhibit, for the first time, readily changeable patterns of illumination.
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, …