A5073261220- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Hydrology and Watershed Management Studies
- Freshwater macroinvertebrate diversity and ecology
- Environmental DNA in Biodiversity Studies
- Aquatic Invertebrate Ecology and Behavior
- Microbial Community Ecology and Physiology
- Species Distribution and Climate Change
- Soil erosion and sediment transport
- Climate change and permafrost
- Soil and Water Nutrient Dynamics
- Coastal wetland ecosystem dynamics
- Land Use and Ecosystem Services
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Identification and Quantification in Food
- Protist diversity and phylogeny
- Peatlands and Wetlands Ecology
- Political Influence and Corporate Strategies
- Ecology and Vegetation Dynamics Studies
- Geological Studies and Exploration
- Atmospheric and Environmental Gas Dynamics
- Media Studies and Communication
- Aquatic Ecosystems and Phytoplankton Dynamics
- Public Policy and Administration Research
University of New Brunswick
2014-2024
Environment and Climate Change Canada
2017-2024
University of North Texas
2021
University of Guelph
2021
Lancaster University
2021
QLT (Canada)
2012
Loughborough University
2001-2011
Dalhousie University
2004
Anthropogenic environmental changes, or ‘stressors’, increasingly threaten biodiversity and ecosystem functioning worldwide. Multiple-stressor research is a rapidly expanding field of science that seeks to understand ultimately predict the interactions between stressors. Reviews meta-analyses primary scientific literature have largely been specific either freshwater, marine terrestrial ecology, ecotoxicology. In this cross-disciplinary study, we review state knowledge within among these...
Biodiversity metrics are critical for assessment and monitoring of ecosystems threatened by anthropogenic stressors. Existing sorting identification methods too expensive labour-intensive to be scaled up meet management needs. Alternately, a high-throughput DNA sequencing approach could used determine biodiversity from bulk environmental samples collected as part large-scale biomonitoring program. Here we show that both morphological sequence-based analyses suitable recovery individual...
The biological assessment of rivers i.e., their through use aquatic assemblages, integrates the effects multiple-stressors on these systems over time and is essential to evaluate ecosystem condition establish recovery measures. It has been undertaken in many countries since 1990s, but not globally. And where national or multi-national monitoring networks have gathered large amounts data, poor water body classifications necessarily resulted rehabilitation rivers. Thus, here we aimed identify...
Rivers suffer from multiple stressors acting simultaneously on their biota, but the consequences are poorly quantified at global scale. We evaluated biological condition of rivers globally, including largest proportion countries Global South published to date. gathered macroinvertebrate- and fish-based assessments 72,275 37,676 sites, respectively, 64 study regions across six continents 45 nations. Because were based differing methods, different systems consolidated into a 3-class system:...
River flow regimes, controlled by climatic and catchment factors, vary over a wide range of temporal spatial scales. This hydrological dynamism is important in determining the structure functioning riverine ecosystems; however, such hydroecological associations remain poorly quantified. paper explores models relationships between suite regime predictors macroinvertebrate community metrics from 83 rivers England Wales. A two-stage analytical approach was employed: (1) classification river...
An ongoing challenge for ecological studies has been the collection of data with high precision and accuracy at a suitable scale to detect manage critical global change processes. A major hurdle time-consuming challenging process sorting identification organisms, but rapid development DNA metabarcoding as biodiversity observation tool provides potential solution. As high-throughput sequencing becomes more cost-effective, ‘big data’ revolution is anticipated, based on higher accurate...
Classical biomonitoring techniques have focused primarily on measures linked to various biodiversity metrics and indicator species. Next-generation (NGB) describes a suite of tools approaches that allow the examination broader spectrum organisational levels - from genes entire ecosystems. Here, we frame ten key questions envisage will drive field NGB over next decade. While not exhaustive, this list covers most challenges facing NGB, provides basis steps for research implementation in field....
Abstract Spatio‐temporal variability in river flow is a fundamental control on instream habitat structure and riverine ecosystem biodiversity integrity. However, long‐term ecological time‐series to test hypotheses about hydrology–ecology interactions broader temporal context are rare, studies spanning multiple rivers often limited their coverage less than five years. To address this research gap, unique spatio‐temporal hydroecological analysis was conducted of responses (1990–2000) regime at...
Abstract A wide range of ‘ecologically relevant’ hydrological indices (variables) have been identified as potential drivers riverine communities. Recently, concerns expressed regarding index redundancy (i.e. similar patterns variance) across the host descriptors on offer to researchers and water resource managers. Some guiding principles are required aid selection most statistically defensible meaningful river flow for hydroecological analysis. In this short communication, we investigate...
Aquatic ecosystems are under threat from multiple stressors, which vary in distribution and intensity across temporal spatial scales. Monitoring assessment of these have historically focussed on collection physical chemical information increasingly include associated observations biological condition. However, ecosystem is often lacking because the scale quality frequently fail to match those available measurements. The advent high-performance computing, coupled with new earth observation...
The complexity and natural variability of ecosystems present a challenge for reliable detection change due to anthropogenic influences. This issue is exacerbated by necessary trade-offs that reduce the quality resolution survey data assessments at large scales. Peace–Athabasca Delta (PAD) inland wetland complex in northern Alberta, Canada. Despite its geographic isolation, PAD threatened encroachment oil sands mining Athabasca watershed hydroelectric dams Peace watershed. Methods capable...
Environmental flows (e-flows) aim to mitigate the threat of altered hydrological regimes in river systems and connected waterbodies are an important component integrated strategies address multiple threats freshwater biodiversity. Expanding accelerating implementation e-flows can support conservation help restore biodiversity resilience hydrologically water-stressed rivers ecosystems. While there have been significant developments e-flow science, assessment, societal acceptance, within water...
Abstract As a key contribution to Canada's Ecosystem Status and Trends (ESTR) national assessment, the goal of our study was utilize available flow data as surrogate habitat suitability for aquatic ecological communities, examine temporal trends in hydroecological variables over 1970–2005 period. Daily were extracted from Reference Hydrological Basin Network, an agglomerative hierarchical classification method used identify homogenous regions with similar seasonality regime. Six regime...
In many agricultural landscapes where field drainage is required to enhance crop production, ditches, and their associated banks hedgerows can support riparian biodiversity, including bird communities. Against a global background of farmland terrestrial insect decline due intensification extensification, emerging aquatic insects in these corridors provide pulse energy-rich, nutritionally-important food for birds other wildlife. this paper, we quantify the value ditch habitats terms...
Abstract Widespread alteration of flow regimes requires guidelines for the protection river ecosystems based on sound science. Preservation biodiversity within and sustaining natural ecological functions are key aspects their management. However, relationship between biota flow‐related phenomena is poorly understood and, as a consequence, over‐simplistic hydrology‐based management have been adopted without establishing clear indicators success. In present paper, we aim to support improvement...
Abstract The taxonomic resolution of macroinvertebrate community data needs careful consideration, to ensure that research objectives in pure and applied freshwater scientific are met. level taxonomy used may be driven by time financial restrictions associated with the increasing resources effort needed identify organisms a lower resolution. This paper aims assess influence on understanding long‐term (1985–2006) benthic response changes hydrological regime. There were marked differences...
Abstract A multi‐scale hydroclimatic study of runoff generation in the Athabasca River watershed located western Canada is presented. Mann–Kendall trend detection tests performed on hydrometric data for lower (LAR) revealed predominantly significant ( p < 0.05) declines annual and open‐water season median/mean indices over 1958–2009, with ice‐influenced experiencing median not mean. The presence or absence 25 th 75 percentiles helped explain these results. only noteworthy result from...
The importance of flow regime variability for maintaining ecological functioning and integrity river ecosystems has been firmly established in both natural anthropogenically modified systems. River regimes across lowland catchments eastern England are examined using 47 variables, including those derived the Indicators Hydrologic Alteration (IHA) software. A principal component analysis method was used to identify redundant hydrological variables that best characterized series (1986–2005)....
This review presents a summary of the influences floods on river ecology, both instream and adjacent floodplain, mostly in Canadian context. It emphasizes that ecological impacts benefits can be highly dependent flood-generation processes their magnitude timing. In Canada, occur under open-water or ice-influenced conditions. The generated from ice jamming are particularly relevant ecosystems due to potentially higher water levels produced suspended sediment concentrations detrimental aquatic...
Abstract The biodiversity–ecosystem function hypothesis postulates that higher biodiversity is correlated with faster ecosystem process rates and increased stability in fluctuating environments. Exhibiting high spatiotemporal habitat diversity, floodplains are highly productive ecosystems, supporting communities naturally resilient diverse. We examined linkages among floodplain wetland habitats, invertebrate their associated traits, across 60 sites within the wetlands of lower Wolastoq |...
Abstract Excessive fine sediment (particles <2 mm) deposition in freshwater systems is a pervasive stressor worldwide. However, understanding of ecological response to excess river at the global scale limited. Here, we aim address whether there consistent increasing levels deposited by invertebrates across multiple geographic regions (Australia, Brazil, New Zealand and UK). Results indicate responses are not globally instead dependent on both region facet invertebrate diversity...
Investigate whether retinas of mice with impaired retinal cycles exposed to light or kept in the dark tolerate prolonged high-dose administration QLT091001, which contains as an active ingredient, 9-cis-retinal precursor, 9-cis-retinyl acetate.Four- six-week-old Lrat(-/-) and Rpe65(-/-) (n = 126) well crossbred Gnat1(-/-) lacking rod phototransduction 110) were gavaged weekly for 6 months 50 mg/kg either after being bleaching 30 min/wk followed by maintenance a 12-hour ≤ 10 lux)/12-hour...
Abstract Natural and anthropogenically driven changes in upstream watershed conditions strongly influence the hydrological, geomorphological ecological processes within downstream riverine deltaic ecosystems. The goal of our study was to examine temporal trends spatial patterns ecologically relevant hydrological variables Athabasca River Peace–Athabasca Delta (PAD), located northwestern Canada. Temporal for a suite indicators hydrologic alteration, appropriate cold regions environments, were...