Explanipedia

Divergent oxygen trends in ice-covered lakes driven by ice-cover decline and ecological memory Open

Joachim Jansen, Gesa A. Weyhenmeyer, Laura H. Härkönen, Andrew M. Paterson, Paul A. del Giorgio , et al. · 2025

Dissolved oxygen (DO) is an essential resource in ice-covered lakes, regulating water quality and biodiversity, including the survival of economically important fish species. Most of the world’s lakes seasonally freeze, often resulting in …

Revisiting lakes within the Rideau Canal system (Ontario, Canada) to assess the impacts of multiple environmental stressors over the past ~25 years using diatom-based paleolimnology Open

Kapillesh Balasubramaniam, Kathleen M. Rühland, Andrew M. Paterson, John P. Smol · 2025

Diatom-based paleolimnological studies conducted ~25 years ago on five lakes (i.e., Big Rideau, Upper Rideau, Lower Rideau, Indian and Otter lakes) within the Rideau Canal system (Ontario, Canada) tracked extensive catchment disturbances r…

Adaptation in a keystone grazer under novel predation pressure Open

Danai Kontou, Andrew M. Paterson, Elizabeth J. Favot, Christopher Grooms, John P. Smol , et al. · 2025

Understanding how species adapt to environmental change is necessary to protect biodiversity and ecosystem services. Growing evidence suggests species can adapt rapidly to novel selection pressures like predation from invasive species, but…

Has lake brownification ceased? Stabilization, re-browning, and other factors associated with dissolved organic matter trends in eastern Canadian lakes Open

Md Noim Imtiazy, Andrew M. Paterson, Scott N. Higgins, Huaxia Yao, Daniel Houle , et al. · 2024

The increase in dissolved organic carbon (DOC) concentrations in freshwater systems has received considerable attention due to its implications for drinking water treatment and numerous limnological processes. While past studies have docum…

Climate-driven deoxygenation of northern lakes Open

Joachim Jansen, Gavin L. Simpson, Gesa A. Weyhenmeyer, Laura H. Härkönen, Andrew M. Paterson , et al. · 2024

Oxygen depletion constitutes a major threat to lake ecosystems and the services they provide. Most of the world’s lakes are located >45° N, where accelerated climate warming and elevated carbon loads might severely increase the risk of hyp…

Using paleolimnology to assess long-term acidification and recovery trajectories in lakes from Killarney Provincial Park and Sudbury (Ontario, Canada) Open

Courtney Lanigan, Neal Michelutti, Andrew M. Paterson, Carsten Meyer‐Jacob, Brigitte Simmatis , et al. · 2024

For over a century, the copper and nickel mining centre of Sudbury in northeastern Ontario (Canada) was a major source of sulphur dioxide and other pollutants, degrading terrestrial and aquatic ecosystems in the surrounding region. In the …

Lake water chemistry and its relationship to shoreline residential development and natural landscape features in Algonquin Provincial Park, Ontario, Canada Open

Anna M. DeSellas, Andrew M. Paterson, Kathleen M. Rühland, John P. Smol · 2023

There is a scarcity of long-term chemical monitoring data for lakes in Algonquin Provincial Park (APP), with minimal understanding of the impacts of cottage-leases (e.g., cottage lots, campgrounds, and commercial leases) on lake water chem…

Low cobalt limits cyanobacteria heterocyst frequency in culture but potential for cobalt limitation of frequency in nitrogen-limited surface waters is unclear Open

Purnank Shah, Jason J. Venkiteswaran, Lewis A. Molot, Scott N. Higgins, Sherry L. Schiff , et al. · 2023

1. Impacts of three cobalt (Co) concentrations were examined on heterocyst frequency and growth rate in four diazotrophic cyanobacteria species in nitrogen (N)-depleted culture and growth rate in one non-diazotrophic species in N-replete c…

Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century Open

Elizabeth J. Favot, Claire Holeton, Anna M. DeSellas, Andrew M. Paterson · 2023

Favot EJ, Holeton C, DeSellas AM, Paterson AM. 2023. Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century. Lake Reserv Manage. 39:1–20.The Ontario Ministry of the Environment, Conservation and Pa…

Developing diatom‐based inference models to assess lake ecosystem change along a gradient of metal smelting impacts: Sudbury lakes revisited Open

Yuanyu Cheng, Neal Michelutti, Andrew M. Paterson, Carsten Meyer‐Jacob, John P. Smol · 2022

Mining and smelting activities have strongly influenced the Sudbury region (Ontario, Canada) since the late 19 th century, leading to acidification and metal contamination in many local ecosystems. Regulations on restricting acidic emissio…

Dataset: Calculation of pCO2 based on chemical variables Open

Mathilde Couturier, Yves T. Prairie, Andrew M. Paterson, Erik J. S. Emilson, Paul A. del Giorgio · 2022

The dataset contains the supplementary data generated and analyzed in the manuscript “Long term trends in pCO2 in lake surface water following rebrowning” by Couturier et al. The dataset includes 1) chemical variables (water temperature, p…

Dataset: Calculation of pCO2 based on chemical variables Open

Mathilde Couturier, Yves T. Prairie, Andrew M. Paterson, Erik J. S. Emilson, Paul A. del Giorgio · 2022

The dataset contains the supplementary data generated and analyzed in the manuscript “Long term trends in pCO2 in lake surface water following rebrowning” by Couturier et al. The dataset includes 1) chemical variables (water temperature, p…

Using diatoms to track road-salt seepage into small, shallow, softwater Ontario lakes Open

Robin E. Valleau, Kathleen M. Rühland, Andrew M. Paterson, John P. Smol · 2022

Since the 1950s, the widespread application of road salt for winter road maintenance and safety in cold regions has led to increased conductivity levels in many freshwater systems. Salting practices have adversely affected freshwater biota…

Chloride trends in Ontario’s surface and groundwaters Open

Ryan J. Sorichetti, Melanie Raby, Claire Holeton, Nadine Benoit, Lucas William Carson , et al. · 2022

The Ontario Ministry of the Environment, Conservation and Parks leads 11 long-term monitoring programs at over 2,500 surface and groundwater sampling locations across the province that report chloride (Cl−) concentration, some dating back …

Microplastics in Muskoka-Haliburton Headwater Lakes, Ontario, Canada Open

Brittany Welsh, Julian Aherne, Andrew M. Paterson, Huaxia Yao, Chris McConnell · 2022

Microplastics (mp) are a growing environmental concern due to their ubiquity in terrestrial and aquatic environments. Nonetheless, there is limited knowledge on their abundance in lakes in rural areas. In this study, we surveyed 14 headwat…

Atmospheric Deposition of Anthropogenic Particles and Microplastics in South-Central Ontario, Canada Open

Brittany Welsh, Julian Aherne, Andrew M. Paterson, Huaxia Yao, Chris McConnell · 2022

Cleaner air reveals growing influence of climate on dissolved organic carbon trends in northern headwaters Open

Heleen A. de Wit, John L. Stoddard, Donald T. Monteith, James Sample, Kari Austnes , et al. · 2021

Surface water browning, the result of increasing concentrations of dissolved organic matter (DOM), has been widespread in northern ecosystems in recent decades. Here, we assess a database of 426 undisturbed headwater lakes and streams in E…

Early presence of Bythotrephes cederströmii (Cladocera: Cercopagidae) in lake sediments in North America: evidence or artifact? Open

Nichole E. DeWeese, Elizabeth J. Favot, Donn K. Branstrator, Euan D. Reavie, John P. Smol , et al. · 2021

The spiny water flea ( Bythotrephes cederströmii ), a freshwater crustacean considered to be the world’s best-studied invasive zooplankter, was first recorded in North America in the Laurentian Great Lakes during the 1980s. Its arrival is …

Global data set of long-term summertime vertical temperature profiles in 153 lakes Open

Rachel M. Pilla, Elizabeth M. Mette, Craig E. Williamson, Б. В. Адамович, Rita Adrian , et al. · 2021

Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes around the world. Though many st…

Earlier winter/spring runoff and snowmelt during warmer winters lead to lower summer chlorophyll‐ <i>a</i> in north temperate lakes Open

Allison R. Hrycik, Peter D. F. Isles, Rita Adrian, Matthew F. Albright, Linda C. Bacon , et al. · 2021

Winter conditions, such as ice cover and snow accumulation, are changing rapidly at northern latitudes and can have important implications for lake processes. For example, snowmelt in the watershed—a defining feature of lake hydrology beca…

Widespread deoxygenation of temperate lakes Open

Stephen F. Jane, Gretchen J. A. Hansen, Benjamin M. Kraemer, Peter R. Leavitt, Joshua L. Mincer , et al. · 2021

Climate change drives widespread shifts in lake thermal habitat Open

Benjamin M. Kraemer, Rachel M. Pilla, R. Iestyn Woolway, Orlane Anneville, Syuhei Ban , et al. · 2021

Linking changes in sedimentary Cladocera assemblages to limnological variables in 67 Sudbury (Ontario, Canada) lakes reflecting various degrees of metal smelter impacts Open

Brigitte Simmatis, Andrew M. Paterson, Brie A. Edwards, John P. Smol · 2021

Despite extensive records of chemical recovery, relatively little is known about recovery of aquatic biota in Sudbury (Ontario, Canada). Cladocera (Branchiopoda) are key components of lake food webs, and understanding spatial patterns in t…

Mechanisms mediating the stimulatory effects of the boar on gilt reproduction Open

P. E. Hughes, GR Pearce, Andrew M. Paterson · 2020

Preface: paleolimnology and lake management Open

Andrew M. Paterson, Dörte Köster, Euan D. Reavie, Thomas J. Whitmore · 2020

Paterson AM, Köster D, Reavie ED, Whitmore TJ. 2020. Preface: paleolimnology and lake management. Lake Reserv Manage. 36:205–209. Paleolimnology uses information preserved in lake, river, and wetland sediments to understand past environmen…

The browning and re-browning of lakes: Divergent lake-water organic carbon trends linked to acid deposition and climate change Open

Carsten Meyer‐Jacob, Neal Michelutti, Andrew M. Paterson, Brian F. Cumming, Wendel Keller , et al. · 2019

Widespread diminishing anthropogenic effects on calcium in freshwaters Open

Gesa A. Weyhenmeyer, Jens Hartmann, Dag O. Hessen, Jiřı́ Kopáček, Josef Hejzlar , et al. · 2019

River and Lake Ice Processes—Impacts of Freshwater Ice on Aquatic Ecosystems in a Changing Globe Open

Karl‐Erich Lindenschmidt, Helen M. Baulch, Emily Cavaliere, Bailey Hewitt, Lianna Lopez , et al. · 2018

Most freshwater aquatic ecosystems have focused on open-water conditions, during spring, summer, and autumn. Studies in winter during ice-covered conditions are sparse due to the logistic difficulties of sampling during freezing weather an…

Historical Trends, Drivers, and Future Projections of Ice Phenology in Small North Temperate Lakes in the Laurentian Great Lakes Region Open

Bailey Hewitt, Lianna Lopez, Katrina Gaibisels, Alyssa Murdoch, Scott N. Higgins , et al. · 2018

Lake ice phenology (timing of ice breakup and freeze up) is a sensitive indicator of climate. We acquired time series of lake ice breakup and freeze up, local weather conditions, and large-scale climate oscillations from 1981–2015 for seve…

Increased relative abundance of colonial scaled chrysophytes since pre-industrial times in minimally disturbed lakes from the Experimental Lakes Area, Ontario Open

Graham R. Mushet, Karlee Flear, Brendan Wiltse, Andrew M. Paterson, Brian F. Cumming · 2017

A top–bottom paleolimnological analysis of 30 undisturbed lakes in the Experimental Lakes Area (ELA) in northwest Ontario showed marked increases in the relative abundance of colonial scaled chrysophyte taxa in most lakes since pre-industr…

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