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Ecosystem metabolism (e.g., gross primary production [GPP], respiration [R], and net ecosystem production) integrates the activity of aerobic organisms and is an indicator of environmental change. Microplastics (i.e., particles 1–5 mm) are widespread in freshwater ecosystems and are colonized by biofilms and other organisms. However, microplastics' effects on ecosystem‐level processes including metabolism or other gas fluxes i...
Acoustic Monitoring Enables Multi‐Taxa Conservation Assessment and Prioritisation Over Large Scales and for Rare and Cryptic SpeciesNARA Subscribed
Aim To combat the global biodiversity crisis, robust and scalable data are needed to target, monitor and evaluate conservation efforts, particularly in data‐poor regions and for cryptic taxa. Passive acoustic monitoring (PAM) has the potential to provide solutions, but real‐world examples are still rare. We demonstrate how PAM data can be used to rapidly and effectively map distributions of multiple taxa over large scales, in...
Eutrophication and Warming Drive Algal Community Shifts in Synchronised Time Series of Experimental LakesNARA Subscribed
Lake ecosystems are increasingly impacted by eutrophication and climate change. Whole‐lake experiments have provided ecosystem‐scale insights into the effects of freshwater stressors, yet these are constrained to the duration of monitoring programmes. Here, we leveraged multidecadal monitoring records and century‐scale paleogenetic reconstructions for experimentally fertilised and unmanipulated lakes in the IISD Experimental L...
Warming combined with experimental eutrophication intensifies lake phytoplankton bloomsNARA Subscribed
Phytoplankton blooms are a global water quality issue, and successful management depends on understanding their responses to multiple and interacting drivers, including nutrient loading and climate change. Here, we examine a long‐term dataset from Lake 227, a site subject to a fertilization experiment (1969–present) with changing nitrogen:phosphorus (N:P) ratios. We applied a process‐oriented model, MyLake, and updated the mod...
Phytoplankton and cyanobacteria abundances in mid‐21st century lakes depend strongly on future land use and climate projectionsNARA Subscribed
Land use and climate change are anticipated to affect phytoplankton of lakes worldwide. The effects will depend on the magnitude of projected land use and climate changes and lake sensitivity to these factors. We used random forests fit with long‐term (1971–2016) phytoplankton and cyanobacteria abundance time series, climate observations (1971–2016), and upstream catchment land use (global Clumondo models for the year 2000) da...
Multidecadal carbon sequestration in a headwater boreal lakeNARA Subscribed
Dissolved organic carbon (DOC) was measured continuously since 1970 in a pristine headwater boreal lake and its catchment at the IISD‐Experimental Lakes Area (Ontario, Canada). Mass balanced accounting of DOC concentrations in precipitation, watershed runoff, and inflow and outflow streams, and integrated weekly hydrological data determined annual mass flux of DOC to and from the lake. Inputs minus outputs represented two resi...
Ecology under lake iceNARA Subscribed
Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer ‘growing seasons’. We executed the first global quantitative synthesis on under‐ice lake ecology, including 36 abiotic and biotic variables from 42 research groups and 101 lakes, examining...
Potential for large‐bodied zooplankton and dreissenids to alter the productivity and autotrophic structure of lakesNARA Subscribed
While limnological studies have emphasized the importance of grazers on algal biomass and primary production in pelagic habitats, few studies have examined their potential role in altering total ecosystem primary production and it's partitioning between pelagic and benthic habitats. We modified an existing ecosystem production model to include biotic feedbacks associated with two groups of large‐bodied grazers of phytoplankton...
Gene expression in closely related species mirrors local adaptation: consequences for responses to a warming worldNARA Subscribed
Local adaptation of populations could preclude or slow range expansions in response to changing climate, particularly when dispersal is limited. To investigate the differential responses of populations to changing climatic conditions, we exposed poleward peripheral and central populations of two L epidoptera to reciprocal, common‐garden climatic conditions and compared their whole‐transcriptome expression. We found evidence of...
Rates of epilithic N 2 fixation in the rocky littoral zones of Lake Malawi, determined by in situ incubations and the acetylene reduction method, declined with depth, were highly correlated to light intensity and heterocyst biovolume, and are among the highest observed values for freshwater or marine systems. Daytime N 2 fixation rates were similar between sites at similar depths, except at sediment and nutrient impacted sites...
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