Jennifer Lento

Jennifer Lento
University of New Brunswick · Department of Biology

PhD Biology

About

54
Publications
25,540
Reads
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424
Citations
Citations since 2016
40 Research Items
376 Citations
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2016201720182019202020212022020406080100
Introduction
Jennifer Lento is a Research Scientist with the Canadian Rivers Institute at the Department of Biology, University of New Brunswick. She conducts research in Freshwater Ecology, with an emphasis on benthic assemblages. She is Science Coordinator of the Freshwater Steering Group of the Circumpolar Biodiversity Monitoring Program (CBMP), part of the CAFF working group of the Arctic Council, and co-chair of the Freshwater Biodiversity Observation Network (FW BON) of GEOBON.
Additional affiliations
August 2014 - present
Canadian Rivers Institute, University of New Brunswick
Position
  • Researcher
February 2010 - August 2014
Canadian Rivers Institute, University of New Brunswick
Position
  • Postdoctoral Fellowship
Education
January 2005 - May 2010
University of Ottawa
Field of study
  • Biology
September 2002 - December 2004
Trent University
Field of study
  • Watershed Ecosystems
September 1998 - June 2002
University of Guelph
Field of study
  • Environmental Protection

Publications

Publications (54)
Presentation
Full-text available
Eskers are complex geological formation that provide crucial resources in northern countries such as drinking water, sand/gravel, outdoor recreational sites, and productive forests. However, there is a huge knowledge gap about the biodiversity and functioning of eskers. Esker lakes are different from other boreal lakes as they are mainly fed by gro...
Presentation
Full-text available
Eskers are complex geological formations formed by glaciers during the last ice age. Now, Eskers provide crucial resources in northern countries such as drinking water, sand/gravel, outdoor recreational sites, and productive forests. However, there is a huge knowledge gap about the biodiversity and functioning of eskers. Esker lakes are different f...
Article
Full-text available
In most countries, major development projects must satisfy an Environmental Impact Assessment (EIA) process that considers positive and negative aspects to determine if it meets environmental standards and appropriately mitigates or offsets negative impacts on the values being considered. The benefits of before-after-control-impact monitoring desig...
Poster
Full-text available
Eskers are complex geological formation that provide crucial resources in northern countries such as drinking water, sand/gravel, outdoor recreational sites, and productive forests. However, there is a huge knowledge gap about the biodiversity and functioning of eskers. Esker lakes are different from other boreal lakes as they are mainly fed by gro...
Article
The cover image is based on the Original Article Temperature and spatial connectivity drive patterns in freshwater macroinvertebrate diversity across the Arctic, by Jennifer Lento et al. https://doi.org/10.1111/fwb.13805.
Chapter
Aim The unique aspects of high latitude rivers are discussed including environmental drivers of biotic structure and function, and the effects of development and climate warming on these ecosystems. Ecology of high latitude rivers The physical-chemical environment of these rivers is dominated by cold temperatures and river ice. Spring ice breakup c...
Article
Full-text available
• Climate warming and subsequent landscape transformations result in rapid ecological change in Arctic freshwaters. Here we provide a synthesis of the diversity of benthic diatoms, plankton, macrophytes, macroinvertebrates, and fish in Arctic freshwaters. • We developed a multi-organism measure of α diversity to characterise circumpolar spatial pat...
Poster
Full-text available
Eskers are complex geological formation formed by glaciers during the last ice age. Eskers provide now crucial resources in all northern countries such as drinking water, sand/gravel, outdoor recreational sites and productive forests. However, there is a huge knowledge gap about the biodiversity and functioning of eskers, and baseline ecological in...
Poster
Full-text available
ARCTIC-BIODIVER is a large and multidisciplinary collaboration among research groups of Europe and North America that aims to facilitate development of biodiversity scenarios at national and circumpolar scales. In this poster, we present the extent and geographic distribution of a dataset of >100 lakes and streams covering broad latitudinal and eco...
Article
Full-text available
• Climate change is predicted to have dramatic effects on Arctic freshwater ecosystems through changes to the abiotic template that are expected to influence biodiversity. Changes are already ongoing in Arctic systems, but there is a lack of coordinated monitoring of Arctic freshwaters that hinders our ability to assess changes in biodiversity. • T...
Article
Full-text available
• Warming in the Arctic is predicted to change freshwater biodiversity through loss of unique taxa and northward range expansion of lower latitude taxa. Detecting such changes requires establishing circumpolar baselines for diversity, and understanding the primary drivers of diversity. • We examined benthic macroinvertebrate diversity using a circu...
Article
Full-text available
• Arctic freshwaters are facing multiple environmental pressures, including rapid climate change and increasing land-use activities. Freshwater plankton assemblages are expected to reflect the effects of these stressors through shifts in species distributions and changes to biodiversity. These changes may occur rapidly due to the short generation t...
Presentation
Climate change is one of the most important threats to aquatic biodiversity worldwide, but especially in Arctic freshwaters, where it is expected to cause changes in mean water temperatures, catchment properties and water quality. Climate-driven changes in inputs of nutrients and organic matter from the catchment are expected to affect community c...
Presentation
Assessments of diversity in Arctic freshwaters generally focus on structural diversity, i.e., the number and composition of taxa at local or regional scales. However, changes in community structure may not result in alterations to ecosystem function if there is strong niche overlap among taxa, leading to functional redundancy. In Arctic freshwaters...
Chapter
River ecosystems have adapted to a natural range of variability in magnitude, timing, duration, and predictability of key hydrograph components, such as high- and low-flow periods. However, the timing, magnitude, and variability of cold region flow regimes are changing in response to a warming climate, water abstraction, and building of impoundment...
Article
Full-text available
Retrogressive thaw slumps are areas of unstable degraded permafrost that often drain into nearby watersheds, leading to increased sediment loads and changes in water quality. Thaw slumps are prevalent across the Arctic, including western Canada, Alaska, and Russia, and high-altitude areas of western China. Over the past several decades, increased t...
Article
Full-text available
• Freshwater chemistry across the circumpolar region was characterised using a pan‐Arctic data set from 1,032 lake and 482 river stations. Temporal trends were estimated for Early (1970–1985), Middle (1986–2000), and Late (2001–2015) periods. Spatial patterns were assessed using data collected since 2001. • Alkalinity, pH, conductivity, sulfate, ch...
Article
Full-text available
• Arctic freshwaters support biota adapted to the harsh conditions at these latitudes, but the climate is changing rapidly and so are the underlying environmental filters. Currently, we have limited understanding of broad‐scale patterns of Arctic riverine biodiversity and the correlates of α‐ and β‐diversity. • Using information from a database set...
Article
• Climate change poses a significant threat to Arctic freshwater biodiversity, but impacts depend upon the strength of organism response to climate‐related drivers. Currently, there is insufficient knowledge about Arctic freshwater biodiversity patterns to guide assessment, prediction, and management of biodiversity change. • As part of the Circump...
Article
• Indigenous Peoples in the Arctic have for millennia relied on freshwaters for drinking water and freshwater species that comprise important subsistence harvests, which promotes a strong connection to the land and unique understanding of organisms and ecosystem processes and changes. Despite the importance of freshwater biodiversity and ecosystem...
Article
Shale-gas production could impact freshwater quality through contamination of the physical and chemical habitat (e.g., fracturing fluids, untreated or treated effluent) or development-related impacts. Despite environmental concerns, information is lacking to support biomonitoring as a diagnostic tool to assess impacts of shale-gas production. We ch...
Article
1.Arctic regions support a wide variety of freshwater ecosystems. These naturally oligotrophic and cold‐water streams, rivers, ponds and lakes are currently being impacted by a diversity of anthropogenic pressures, such as accelerated climate change, permafrost thaw, land‐use change, eutrophication, brownification, and the replacement of northern b...
Article
Full-text available
Comprehensive assessments of contemporary diatom distributions across the Arctic remain scarce. Furthermore, studies tracking species compositional differences across space and time, as well as diatom responses to climate warming, are mainly limited to paleolimnological studies due to a lack of routine monitoring in lakes and streams across vast ar...
Article
Parasites can compromise the health and fitness of individual fish, and it is important to generate baseline information that can then be used to document changes in the abundance and distribution of potentially pathogenic parasites. The ectoparasitic copepod Salmincola edwardsii was assessed with respect to prevalence (percentage of infected fish...
Article
Arctic and sub‐Arctic lakes in northern Europe are increasingly threatened by climate change, which can affect their biodiversity directly by shifting thermal and hydrological regimes, and indirectly by altering landscape processes and catchment vegetation. Most previous studies of northern lake biodiversity responses to environmental changes have...
Article
Full-text available
Climate change, biological invasions, and anthropogenic disturbance pose a threat to the biodiversity and function of Arctic freshwater ecosystems. Understanding potential changes in fish species distribution and richness is necessary, given the great importance of fish to the function of freshwater ecosystems and as a resource to humans. However,...
Technical Report
Full-text available
CAFF Circumpolar Biodiversity Monitoring Program State of Arctic Freshwater Biodiversity Report.
Article
Full-text available
Potential for shale gas production is linked to regional geology, which influences water chemistry of freshwater systems. However, there has been little work to establish baseline ecological conditions of rivers within areas of shale gas development. In this study, water chemistry and monitoring metrics for fish and benthic macroinvertebrates were...
Article
• Increasing rates of precipitation and higher air temperatures have increased the size and frequency of retrogressive thaw slumps—large depressions of thawed permafrost that form on the landscape—in north‐western Canada. Many of these thaw slumps flow into nearby stream systems, leading to increased sediment, solute and nutrient loads. • We evalua...
Chapter
Full-text available
This chapter aims to assist biodiversity observation networks across the world in coordinating comprehensive freshwater biodiversity observations at national, regional or continental scales. We highlight special considerations for freshwater biodiversity and methods and tools available for monitoring. We also discuss options for storing, accessing,...
Article
Intensification of permafrost thaw has increased the frequency and magnitude of large permafrost slope disturbances (mega slumps) in glaciogenic terrain of northwestern Canada. Individual thermokarst disturbances up to 40 ha in area have made large volumes of previously frozen, highly weatherable fine-grained sediments available for leaching and tr...
Article
Studies of stream benthic macroinvertebrate size distributions describe assemblages from random small area samplers or cobbles. Large organisms are often underestimated in these samples because of their mobility or low densities. This study compared the performance of cobble collection and a Hess sampler with electrobugging (using a backpack electr...
Article
We explored the importance of environmental drivers in structuring benthic macroinvertebrate communities along a spatial hierarchy (local to landscape scale) in Low Arctic stream systems that were previously unstudied. Macroinvertebrate communities from 29 sites in Low Arctic areas of northern Labrador and Québec, Canada, were quantified by taxonom...
Article
Full-text available
Arctic freshwater ecosystems are facing unique challenges through the interaction of natural and human-induced stressors such as climate change and industrial development. Much is unknown about the biodiversity of Arctic freshwaters, although it is believed to have already been affected by climate change. A pan-Arctic monitoring strategy is critica...
Article
Full-text available
The Mann-Kendall test has been proposed as a nonparametric method to evaluate trends in long-term water quality datasets with missing values, serial correlation, and non-normality. However, this test has rarely been used to evaluate long-term trends in biological data. In this study, we used the Mann-Kendall test to evaluate trends in 15 years of d...
Article
Benthic diatom assemblages respond to changes in water quality, and this response is evidenced by shifts in taxonomic composition. As a result, several taxon-based indices have been developed for monitoring purposes. Some authors have suggested that diatom body size might provide a simpler method for bioassessment than taxonomy-based approaches. Mo...
Article
Full-text available
Few studies of biological recovery from acidification have dealt with community responses to changes in water chemistry, despite the importance of environmental tolerance and biological interactions that may only be visible by examining the community as a whole. In this study, we examined the ability of pH and several water chemistry covariables to...
Article
Benthic macroinvertebrates can be strong indicators of lake conditions, integrating the effects of all physical and chemical aspects of the environment. In lake systems that have been exposed to acid deposition, benthic community structure may be impacted by changes in water chemistry associated with either acidification or subsequent recovery. Mul...

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Projects

Projects (4)
Project
The project aims to facilitate development of biodiversity scenarios at national and circumpolar scales. A primary focus will be to develop strong links between climate change predictions, biodiversity scenarios, and the consequences for ecosystem services in Arctic freshwaters. ARCTIC-BIODIVER will also contribute to circumpolar harmonization of sampling methods, data storage, and large-scale analysis to promote future circumpolar assessments of biodiversity change. For more information about our specific work packages, visit the ARCTIC-BIODIVER webpage https://www.slu.se/en/departments/aquatic-sciences-assessment/research/forskningsprojekt/active-research-projects/arctic-biodiver/ Follow us on twitter: @arcticbiodiver
Project
The Freshwater Steering Group of the Circumpolar Biodiversity Monitoring Program is conducting the first regional and circumpolar assessments of the state of biodiversity in Arctic freshwaters. National Freshwater Expert Networks compiled raw data from numerous sources including national monitoring programs, academia, and industry. The data will be used to assess status and trends in fish, benthic macroinvertebrates, plankton, benthic algae, and macrophytes in relation to environmental drivers across the Arctic and will provide a valuable baseline to inform future monitoring and assessment activities. The assessments will form the basis for the CAFF-CBMP State of Arctic Freshwater Biodiversity Report and a special issue of the journal Freshwater Biology.