A5072842293- Microbial Community Ecology and Physiology
- Environmental DNA in Biodiversity Studies
- Genomics and Phylogenetic Studies
- Gut microbiota and health
- Protist diversity and phylogeny
- Marine and coastal ecosystems
- Spine and Intervertebral Disc Pathology
- Fish Ecology and Management Studies
- Fecal contamination and water quality
- Spinal Hematomas and Complications
- Morphological variations and asymmetry
- Mycobacterium research and diagnosis
- Vascular Malformations Diagnosis and Treatment
- Identification and Quantification in Food
- Coastal wetland ecosystem dynamics
- Cannabis and Cannabinoid Research
- Geology and Paleoclimatology Research
- Plant Toxicity and Pharmacological Properties
- Diet and metabolism studies
- Spinal Fractures and Fixation Techniques
- Sympathectomy and Hyperhidrosis Treatments
- Fish biology, ecology, and behavior
- Peatlands and Wetlands Ecology
- Poisoning and overdose treatments
- Genetic diversity and population structure
Concordia University
2019-2023
University of Cincinnati Medical Center
2023
Université de Montréal
2021-2023
Concord University
2022
Bureau de Coopération Interuniversitaire
2022
Laboratoire Interuniversitaire de Biologie de la Motricité
2021
Université du Québec à Montréal
2021
Wake Forest University
2020
Neurological Surgery
2020
University of Oregon
2013
The use of lake sedimentary DNA to track the long-term changes in both terrestrial and aquatic biota is a rapidly advancing field paleoecological research. Although largely applied nowadays, knowledge gaps remain this there therefore still research be conducted ensure reliability signal. Building on most recent literature seven original case studies, we synthesize state-of-the-art analytical procedures for effective sampling, extraction, amplification, quantification and/or generation...
Accurately identifying the species present in an ecosystem is vital to lake managers and successful bioassessment programs. This particularly important when monitoring cyanobacteria, as numerous taxa produce toxins can have major negative impacts on aquatic ecosystems. Increasingly, DNA-based techniques such metabarcoding are being used for measuring biodiversity, they could accelerate processing time, decrease costs reduce some of biases associated with traditional light microscopy. Despite...
Lakes are critical freshwater resources under mounting pressure from climate change and other anthropogenic stressors. The reconstruction of ecological time series sediment archives with paleolimnological techniques has been shown to be an effective means understanding how humans modifying lake ecosystems over extended timescales. In this study, we combined shotgun DNA sequencing a novel comparative analysis surface water metagenomes expose the diversity microorganisms preserved in...
Protists play key roles in aquatic food webs as primary producers, predators, nutrient recyclers, and symbionts. However, a comprehensive view of protist diversity freshwaters has been challenged by the immense environmental heterogeneity among lakes worldwide. We assessed surface waters 366 freshwater across north temperate to subarctic range covering nearly 8.4 million km2 Canada. Sampled represented broad gradients size, trophic state, watershed land use. Hypereutrophic contained least...
Biodiversity loss has accelerated over the past century and freshwater species overall are among those experiencing greatest declines. Genetic resources have potential to help evaluate full magnitude of this represent a key tool effectively allocate conservation monitor success restoration efforts. The power genetic will be realized when daunting task referencing all DNA sequences organisms is complete. Here, we quantified availability distribution barcode genome data for macroscopic in...
Study Design. Retrospective Cohort Objective. The objective of this study was to compare the rate adjacent segment disease (ASD) between lumbar disk arthroplasty (LDA) and anterior interbody fusion (ALIF). Summary Background Data. LDA ALIF are alternative surgical approaches used treat degenerative disease. However, there is a paucity studies comparing risk ASD after these procedures. Methods. Patients who underwent 1- 2-level or 2010 2022 were identified in PearlDiver Mariner insurance...
Covering 55% of Canada’s total surface area and stretching from coast to coast, the Canadian boreal zone is crucial nation’s economic ecological integrity. Although often viewed as relatively underdeveloped, it vulnerable numerous stressors such mining, forestry, anthropogenic climate change. Natural archives preserved in lake sediments can provide key insights by quantifying pre-disturbance conditions (pre-1850 CE) nature, magnitude, direction, speed environmental change induced over past...
Phenotypes may evolve to become integrated in response functional demands. Once evolved, phenotypes, often modular, can also influence the trajectory of subsequent responses selection. Clearly, connecting modularity and functionally adaptive evolution has been challenging. The teleost skull jaw structures are useful for understanding this connection because key roles that these play feeding novel environments with different prey resources. In present study, we examined such a structure...
Lakes are sentinels of environmental changes within their watersheds including those induced by a changing climate and anthropogenic activities. In particular, contamination originating from point or non-point sources (NPS) might be reflected in the bacterial composition lake water. We assessed abundance potentially pathogenic bacteria (PPB) sampled 413 lakes 8 southern Canadian ecozones that represent wide diversity watershed land use. The study objectives were (1) to explore PPB; (2) build...
Study Design. Retrospective cohort. Objective. To compare the rates of pseudarthrosis in patients undergoing 1-3 level Transforaminal Lumbar Interbody Fusion (TLIF) procedures between cannabis users and non-cannabis users. Summary Background Data. Recreational use is common, though it remains poorly studied legally ambiguous United States. Patients with back pain may turn to adjunctive manage their pain. However, implications on achievement bony fusion are not well-characterized. Methods....
Background Normative venous sinus diameters are not well established. This study seeks to compare two-dimensional digital subtraction cerebral angiographic (DSA) calibers for patients with normal intracranial pressure (ICP) and idiopathic hypertension (IIH). Methods Patients who underwent diagnostic angiography from 2016 2020 were retrospectively identified. Two independent reviewers measured anteroposterior (AP) lateral carotid injection delayed phase in two groups (group 1: ICP; group 2:...
Eukaryotic pathogens including fungi and enteroparasites infect humans, animals plants. As integrators of landscape catchment, lakes can reflect record biological geochemical events or anthropogenic changes provide useful knowledge to formulate public health, food security water policies manage prevent diseases. In this context, potentially pathogenic parasites were sampled using 18S rRNA gene amplicon sequencing in 382 displaying a broad range sizes human impact on the watershed 10 ecozones...
Abstract Molecular genetic approaches applied to environmental DNA have great potential for biodiversity research and ecosystem monitoring. A metagenome is produced via shotgun sequencing of collected directly from the environment represents a sample information all organisms captured in an sample. Metagenomes been primarily used study bacteria archaea, but promising reports focusing on metazoan diversity are emerging. However, methodological uncertainties remain, studies required validate...
Study Design. Retrospective cohort. Objective. To compare the rate of adjacent segment disease (ASD) in patients undergoing anterior lumbar interbody fusion (ALIF) versus transforaminal (TLIF) for treatment degenerative stenosis and spondylolisthesis. Summary Background Data. ALIF TLIF are frequently used to treat Lumbar While both approaches have distinct advantages, it is unclear whether there any differences rates ASD postoperative complications. Methods. A retrospective cohort study who...
Abstract Lakes are heterogenous ecosystems inhabited by a rich microbiome whose genomic diversity is poorly defined. We present continental-scale study of metagenomes representing 6.5 million km 2 the most lake-rich landscape on Earth. Analysis 308 Canadian lakes resulted in metagenome-assembled genome (MAG) catalogue 1,008 mostly novel bacterial genomospecies. Lake trophic state was leading driver taxonomic and functional among MAG assemblages, reflecting responses communities profiled 16S...
Abstract Protists play key roles in aquatic food webs as primary producers, predators, nutrient recyclers, and symbionts. Yet, a comprehensive view of protist diversity freshwaters has been challenged by the immense environmental heterogeneity among lakes worldwide. We assessed surface waters 366 freshwater across north temperate to subarctic extent covering nearly 8.4 million km 2 Canada. Sampled represented broad gradients size, trophic state, watershed land use. Hypereutrophic contained...
Abstract Molecular genetic approaches applied to environmental DNA have great potential for biodiversity research and ecosystem monitoring. A metagenome contains information from all organisms captured in an sample. It has been primarily used study bacteria archaea, but promising reports focusing on metazoan diversity are emerging. However, methodological uncertainties remain, studies required validate the power limitations of such approach when macro-eukaryotes. Here, we analyzed water...
Study Design: Retrospective cohort. Objective: To compare the rates of all-cause surgical complications synthetic interbody devices versus allograft or autograft in patients undergoing 1-2 levels anterior cervical discectomy and fusion (ACDF) procedures. Summary Background Data: Cervical degenerative disorders affect up to 60% older adults United States. Both traditional (polyetheretherketone titanium) are used for decompression arthrodesis, with increasing utilization latter. However,...