A5060538497- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Ecology and Management Studies
- Marine and coastal ecosystems
- Soil and Water Nutrient Dynamics
- Aquatic Invertebrate Ecology and Behavior
- Aquatic Ecosystems and Biodiversity
- Microbial Community Ecology and Physiology
- Arctic and Antarctic ice dynamics
- Water Quality and Pollution Assessment
- Peatlands and Wetlands Ecology
- Hydrology and Watershed Management Studies
- Soil erosion and sediment transport
- Marine Biology and Ecology Research
- Climate change and permafrost
- Biocrusts and Microbial Ecology
- Freshwater macroinvertebrate diversity and ecology
- Coastal wetland ecosystem dynamics
- Environmental Toxicology and Ecotoxicology
- Mercury impact and mitigation studies
- Atmospheric and Environmental Gas Dynamics
- Cryospheric studies and observations
- Ecology and biodiversity studies
- Geology and Paleoclimatology Research
- Biomedical and Engineering Education
- Mollusks and Parasites Studies
University of Missouri
2017-2025
Duke University
2024
University of Saskatchewan
2013-2023
Virginia Tech
2023
Global Institute for Water Security
2013-2017
Trent University
2011-2015
University of Waterloo
2005-2012
The (Lower) Lake of Zurich provides an ideal system for studying the long-term impact environmental change on deep-water hypoxia because its sensitivity to climatic forcing, history eutrophication and subsequent oligotrophication, quality length data set. Based 39 years (1972-2010) measured profiles temperature, oxygen concentration phosphorus (P) concentration, potentially confounding effects oligotrophication forcing occurrence extent in lake were investigated. time-series Nürnberg's...
Abstract Freshwater cyanobacterial blooms have become ubiquitous, posing major threats to ecological and public health. Decades of research focused on understanding drivers these with a primary focus eutrophic systems; however, also occur in oligotrophic systems, but received far less attention, resulting gap our overall. In this review, we explore evidence freshwater systems provide explanations for those occurrences. We show that through their unique physiological adaptations,...
Abstract Cyanobacterial blooms have substantial direct and indirect negative impacts on freshwater ecosystems including releasing toxins, blocking light needed by other organisms, depleting oxygen. There is growing concern over the potential for climate change to promote cyanobacterial blooms, as positive effects of increasing lake surface temperature growth are well documented in literature; however, there evidence that also being initiated persisting relatively cold‐water temperatures...
Three nutrient enrichment experiments involving the addition and removal of iron (Fe) alone, as well in combination with phosphorus (P) and/or nitrogen (N), were conducted offshore nearshore waters eastern basin Lake Erie. Erie phytoplankton are at times colimited by P, N, Fe. This was most clearly demonstrated offshore, strongly stratified waters, where Fe concentration below detection (DL = 2.0 nmol L −1 ), limitation indicators (APA, P debt, C: N: N N) indicated strong moderate...
The Boreal Plains Ecozone ( BPE ) in Western Canada is expected to be an area of maximum ecological sensitivity the 21st century. Successful climate adaptation and sustainable forest management require a better understanding interactions between hydrology, climate, vegetation. This paper provides perspective on changing water cycle from interdisciplinary team researchers, seeking identify critical knowledge gaps. Our review suggests will likely become drier undergo more frequent disturbance...
Abstract Among its many impacts, climate warming is leading to increasing winter air temperatures, decreasing ice cover extent, and changing precipitation patterns over the Laurentian Great Lakes their watershed. Understanding predicting consequences of these changes impeded by a shortage winter‐period studies on most aspects Lake limnology. In this review, we summarize what known about during 3–6 months identify key open questions physics, chemistry, biology other large, seasonally frozen...
Abstract Lakes are classified by thermal mixing regimes, with shallow waterbodies historically categorized as continuously systems. Yet, recent studies demonstrate extended summertime stratification in ponds, underscoring the need to reassess classifications for waterbodies. In this study, we examined dynamics of 34 ponds and lakes across temperate North America Europe categorize identify drivers different regimes. We identified three regimes: rarely ( n = 18), intermittently 10), often 6)...
Abstract The world's 1.4 million lakes (≥10 ha) provide many ecosystem services that are essential for human well‐being; however, only if their health status is good. Here, we reviewed common lake issues and classified them using a simple health‐based approach to outline living systems in need of oxygen, clean water balanced energy nutrient supply. main reason adopting some the terminology classification increase awareness understanding global issues. We show exposed various anthropogenic...
Abstract Winter is an important season for many limnological processes, which can range from biogeochemical transformations to ecological interactions. Interest in the structure and function of lake ecosystems under ice on rise. Although limnologists working at polar latitudes have a long history winter work, required knowledge successfully sample conditions not widely available relatively few receive formal training. In particular, deployment operation equipment below 0°C temperatures pose...
Temperate lakes are ice covered for much of the year; however, winter lake conditions have not been well studied and undergoing rapid change. Using data collected during ice-on periods from 4 north-temperate water bodies, we report observations stable surface layers, solar-induced convective mixed their potential impacts on phytoplankton. The layer is defined as region where Richardson number (Ri) ≤1. In absence a layer, peaks in chlorophyll were near ice–water interface. Light here seemed...
Abstract In a multihospital cohort study of 3392 patients, positive urinalysis parameters had poor predictive value for diagnosing urinary tract infection (UTI). Combined (pyuria or nitrite) performed better than pyuria alone ruling out UTI. However, performance all was in older women.
Lake Simcoe, the largest lake in southern Ontario outside of Laurentian Great Lakes, is affected by numerous stressors including eutrophication resulting from total phosphorus (TP) loading, climate change, and invasions exotic species. We synthesized long-term responses Simcoe to these assessing trends water quality biological composition over multiple trophic levels. Evidence for change included increasing thermal stability changes subfossil diatom communities time. Although deep dissolved...
Come to the Queen City—the greenest city in United States—to talk limnology and oceanography with your favorite scientists at ASM 2025 meeting Charlotte, North Carolina! We'll be uptown Charlotte watershed divide of Catawba Yadkin rivers; uniquely nested within 3 hours from mountains beaches close Lake Norman—the largest humanmade lake Carolina. Whether you're a National Association for Stock Car Auto Racing (NASCAR) enthusiast or white-water rafter—this cosmopolitan has something everyone...
Abstract Declining oxygen concentrations in the deep waters of lakes worldwide pose a pressing environmental and societal challenge. Existing theory suggests that low deep‐water dissolved (DO) could trigger positive feedback through which anoxia (i.e., very DO) during given summer begets increasingly severe occurrences following summers. Specifically, anoxic conditions can promote nutrient release from sediments, thereby stimulating phytoplankton growth, subsequent decomposition fuel...