Biology: Recent submissions
Now showing items 41-60 of 597
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Seedlings of Temperate Tree Species Show Plastic Responses to Water Deficit and Heat Stress, But They Do Not Prevent Decline in Growth
(University of Waterloo, 2022-10-03)Species response to climate change is difficult to predict because warming involves the interaction of multiple stressors whose effects are simultaneous and therefore difficult to disentangle. To address this gap, I studied ... -
Indications of benthic macroinvertebrate assemblage recovery following wastewater treatment upgrades in the central Grand River
(University of Waterloo, 2022-09-28)Treated effluent from wastewater treatment plants (WWTPs) can be a source of substantial nutrient and contaminant loading, altering water chemistry and ecological conditions in receiving waters. To meet new regulations and ... -
Discovering new viral lineages and estimating their abundance in wastewater
(University of Waterloo, 2022-09-27)Wastewater surveillance of SARS-CoV-2 has emerged as a critical tool for tracking the spread of COVID-19. In addition to estimating the relative case numbers using qPCR, SARS-CoV-2 genomic RNA can be extracted from wastewater ... -
Petabase-scale Data Mining Identifies Novel Clostridial Species and Neurotoxins Associated with Ancient Human DNA
(University of Waterloo, 2022-09-08)Analyzing microbial genomes found in archaeological samples can provide insights into the origins of modern infectious diseases. A large-scale metagenomic analysis of archeological samples discovered bacterial species ... -
An Exploration of the Scope of GPCR to RTK Transactivation in HT22 and SH-SY5Y cells
(University of Waterloo, 2022-09-02)Receptor tyrosine kinase (RTK) transactivation is a mechanism by which G proteincoupled receptor (GPCR) activity induces the activation of an RTK. As separate families of receptors, they were long thought to act ... -
Wetland birds and invasive plant management
(University of Waterloo, 2022-08-31)The Great Lakes coastal wetlands are some of the most diverse ecosystems in Ontario. However, their ecological integrity is continually threatened by development, nutrient pollution, and invasive species. Over the past two ... -
Development and application of paleolimnological analyses to disentangle the roles of natural processes and anthropogenic activities on contaminant deposition and hydrological conditions across a northern delta
(University of Waterloo, 2022-08-29)Freshwater ecosystems across northern Canada provide important habitat for wildlife and have long supported the traditional lifestyles of Indigenous communities. Multiple potential stressors threaten the security of water ... -
Paleohydrology of the Wabasca River and relations with past flood regimes at the downstream Peace-Athabasca Delta
(University of Waterloo, 2022-08-22)The Peace-Athabasca Delta (PAD; northern Alberta) is internationally recognized for its ecological, historical, and cultural significance, yet controversy persists over the roles of hydroelectric regulation of Peace River ... -
Investigating the use of enhancer trapping and Cas9-induced rearrangements to characterize cis-regulatory elements in the Drosophila gene hindsight
(University of Waterloo, 2022-08-22)The gene hindsight (hnt) encodes a transcription factor that is essential for all stages of Drosophila development. Expression of hnt has been observed to promote cell specialization and differentiation of several cell ... -
Using paleolimnology to assess influence of Peace River regulation on lakes along two transects in the northern portion of the Peace-Athabasca Delta
(University of Waterloo, 2022-08-18)The Peace-Athabasca Delta (PAD), northern Alberta, Canada, is an ecologically and culturally important floodplain where debate has persisted for more than 60 years about causes of water-level drawdown of its abundant, ... -
Impacts of wastewater treatment plant effluent and pharmaceutical exposure on innate cytokine expression of darters (Etheostoma spp.) in the Grand River
(University of Waterloo, 2022-08-10)Aquatic organisms, such as fish, are in constant contact with various stressors and antigenic material present within their environments. The impact of stressors associated with wastewater-exposed environments on native ... -
Controls of Fish Mercury Concentrations in Subarctic Lakes of Canada
(University of Waterloo, 2022-07-25)Mercury (Hg) is a global pollutant that in its organic and more toxic form, methyl Hg (MeHg), can cause detrimental health effects on fish, wildlife, and humans. In lake ecosystems, concentrations of Hg ([Hg]) in fish ... -
Genome analysis reveals unexpected absence of oxygen metabolic capacity in helminths
(University of Waterloo, 2022-07-06)Oxygen metabolism in parasitic helminths differs significantly from that of most aerobic eukaryotes, as these organisms must be able to switch between aerobic and anaerobic metabolisms depending on their life-cycle stage. ... -
Mercury dynamics in the anadromous Arctic char (Salvelinus alpinus) and food webs of inner Frobisher Bay, Nunavut
(University of Waterloo, 2022-07-06)Mercury (Hg) is a ubiquitous toxic metal that bioaccumulates in organisms and biomagnifies in food webs. Evaluating Hg bioaccumulation and biomagnification in Arctic marine ecosystems is critical for understanding Hg ... -
The Reproductive Effects of Municipal Wastewater Effluents
(University of Guelph, 2017-03-01)There is a growing concern that pharmaceuticals and other chemicals present in the effluents (sewage discharged into a river) from municipal wastewater treatment plants enter the aquatic environment, where they may affect ... -
An Assessment of the Spatial and Temporal Variability of Biological Responses to Municipal Wastewater Effluent in Rainbow Darter (Etheostoma caeruleum) Collected along an Urban Gradient
(PLOS, 2016-10-24)Municipal wastewater effluent (MWWE) and its constituents, such as chemicals of emerging concern, pose a potential threat to the sustainability of fish populations by disrupting key endocrine functions in aquatic organisms. ... -
Characterizing Transcriptional Networks in Male Rainbow Darter (Etheostoma caeruleum) that Regulate Testis Development over a Complete Reproductive Cycle
(PLOS, 2016-11-18)Intersex is a condition that has been associated with exposure to sewage effluents in male rainbow darter (Etheostoma caeruleum). To better understand changes in the transcriptome that are associated with intersex, we ... -
Rainbow trout exposed to benzo[a]pyrene yields conserved microRNA binding sites in DNA methyltransferases across 500 million years of evolution
(Springer, 2017-12-04)The objective of this study was to examine the regulation of DNA methylation following acute (24 h) and prolonged (14 d) exposure to low (1 ng/L) and high (10 ng/L) benzo[a]pyrene. However, with the recent release of the ... -
Use of prospective and retrospective risk assessment methods that simplify chemical mixtures associated with treated domestic wastewater discharges
(Wiley, 2018-03-01)A framework is presented that is intended to facilitate the evaluation of potential aquatic ecological risks resulting from discharges of down-the-drain chemicals. A scenario is presented using representatives of many of ... -
Tissue storage affects lipidome profiling in comparison to in vivo microsampling approach
(Springer, 2018-05-03)Low-invasive in vivo solid-phase microextraction (SPME) was used to investigate the lipid profiles of muscle tissue of living fish. Briefly, mixed mode SPME fibers were inserted into the muscle for 20 min extraction, and ...