Mary E. Power
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View article: James A. Estes: An ecologist’s quest to understand nature
James A. Estes: An ecologist’s quest to understand nature Open
For five decades, Jim A. Estes studied sea otters in the Aleutian archipelago of Alaska, discovering how otters structured entire communities. By consuming sea urchins, otters released kelp from herbivory, kelp beds flourished, and kelps s…
View article: Composition, Growth, Succession, and Function in the <scp> <i>Cladophora</i> </scp> Microbiome: Insights From Quantitative Stable Isotope Probing and <scp>NanoSIMS</scp> Imaging
Composition, Growth, Succession, and Function in the <span> <i>Cladophora</i> </span> Microbiome: Insights From Quantitative Stable Isotope Probing and <span>NanoSIMS</span> Imaging Open
The branching green macroalga Cladophora glomerata and its epiphytic microbiome dominate summer biomass in the Eel River, a Northern California river under Mediterranean (summer drought, winter rain) seasonality. Green Cladophora streamers…
View article: Ecosystem consequences of a nitrogen-fixing proto-organelle
Ecosystem consequences of a nitrogen-fixing proto-organelle Open
Microscale symbioses can be critical to ecosystem functions, but the mechanisms of these interactions in nature are often cryptic. Here, we use a combination of stable isotope imaging and tracing to reveal carbon (C) and nitrogen (N) excha…
View article: Salivary antibodies mirror systemic humoral immunity to SARS CoV-2 and reveal sex-specific differences in salivary anti-spike IgA and IgG levels
Salivary antibodies mirror systemic humoral immunity to SARS CoV-2 and reveal sex-specific differences in salivary anti-spike IgA and IgG levels Open
Durable antibody responses are essential for long-term protection against SARS-CoV-2. We assessed the utility of point-of-care lateral flow tests (LFTs) versus ELISA in monitoring systemic and mucosal immunity and explored saliva as a surr…
View article: Composition, growth, succession, and function in the <i>Cladophora</i> microbiome: insights from quantitative Stable Isotope Probing and NanoSIMS imaging
Composition, growth, succession, and function in the <i>Cladophora</i> microbiome: insights from quantitative Stable Isotope Probing and NanoSIMS imaging Open
The branching green macroalga Cladophora glomerata and its epiphytic microbiome dominate summer biomass in the Eel River, a Northern California river under Mediterranean (summer drought, winter rain) seasonality. Green Cladophora streamers…
View article: Anatomy of a range contraction: Flow–phenology mismatches threaten salmonid fishes near their trailing edge
Anatomy of a range contraction: Flow–phenology mismatches threaten salmonid fishes near their trailing edge Open
Climate change is redistributing life on Earth, with profound impacts for ecosystems and human well-being. While repeat surveys separated by multidecadal intervals can determine whether observed shifts are in the expected direction (e.g., …
View article: Anticipating responses to climate change and planning for resilience in California’s freshwater ecosystems
Anticipating responses to climate change and planning for resilience in California’s freshwater ecosystems Open
As human-caused climate changes accelerate, California will experience hydrologic and temperature conditions different than any encountered in recorded history. How will these changes affect the state’s freshwater ecosystems? Rivers, lakes…
View article: Foodscapes for salmon and other mobile consumers in river networks
Foodscapes for salmon and other mobile consumers in river networks Open
Mobile consumers track fluctuating resources across heterogeneous landscapes to grow and survive. In river networks, the abundance and accessibility of food and the energetic consequences of foraging vary among habitats and through time, p…
View article: Spring temperature predicts upstream migration timing of invasive Sacramento pikeminnow within its introduced range
Spring temperature predicts upstream migration timing of invasive Sacramento pikeminnow within its introduced range Open
Rapid climate change and invasive species introductions threaten ecological communities across the globe. Freshwaters are particularly vulnerable and impacted, especially when these stresses coincide. We document the migration of an invasi…
View article: Foodscapes for Salmon and Other Mobile Consumers in River Networks
Foodscapes for Salmon and Other Mobile Consumers in River Networks Open
Mobile consumers track fluctuating resources across heterogeneous landscapes to grow and survive. In river networks, the abundance and accessibility of food and the costs of foraging vary between habitats and through time, providing a shif…
View article: The salmonid and the subsurface: Hillslope storage capacity determines the quality and distribution of fish habitat
The salmonid and the subsurface: Hillslope storage capacity determines the quality and distribution of fish habitat Open
Water in rivers is delivered via the critical zone (CZ)—the living skin of the Earth, extending from the top of the vegetation canopy through the soil and down to fresh bedrock and the bottom of significantly active groundwater. Consequent…
View article: Seasonal growth potential of <i>Oncorhynchus mykiss</i> in streams with contrasting prey phenology and streamflow
Seasonal growth potential of <i>Oncorhynchus mykiss</i> in streams with contrasting prey phenology and streamflow Open
The growth of any organism depends on habitat conditions, food availability, and their seasonal interactions. Yet in the vast literature on Pacific salmon ( Oncorhynchus ), the seasonal interaction between habitat conditions and food avail…
View article: The salmonid and the subsurface: Hillslope storage capacity determines the quality and distribution of fish habitat
The salmonid and the subsurface: Hillslope storage capacity determines the quality and distribution of fish habitat Open
Water in rivers is delivered via the critical zone that mantles landscapes. Consequently, the success of stream-rearing salmonids depends on the structure and resulting water storage and release processes of this zone. Physical processes b…
View article: <i>Microcoleus</i> (Cyanobacteria) form watershed‐wide populations without strong gradients in population structure
<i>Microcoleus</i> (Cyanobacteria) form watershed‐wide populations without strong gradients in population structure Open
The relative importance of separation by distance and by environment to population genetic diversity can be conveniently tested in river networks, where these two drivers are often independently distributed over space. To evaluate the impo…
View article: Cryptic Constituents: The Paradox of High Flux–Low Concentration Components of Aquatic Ecosystems
Cryptic Constituents: The Paradox of High Flux–Low Concentration Components of Aquatic Ecosystems Open
The interface between terrestrial ecosystems and inland waters is an important link in the global carbon cycle. However, the extent to which allochthonous organic matter entering freshwater systems plays a major role in microbial and highe…
View article: Synthetic threads through the web of life
Synthetic threads through the web of life Open
CRISPR-Cas gene editing tools have brought us to an era of synthetic biology that will change the world. Excitement over the breakthroughs these tools have enabled in biology and medicine is balanced, justifiably, by concern over how their…
View article: The Functional Significance of Bacterial Predators
The Functional Significance of Bacterial Predators Open
The word “predator” may conjure images of leopards killing and eating impala on the African savannah or of great white sharks attacking elephant seals off the coast of California. But microorganisms are also predators, including bacteria t…
View article: Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms Are an Emerging Threat to Clear Lakes Worldwide
Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms Are an Emerging Threat to Clear Lakes Worldwide Open
Nearshore (littoral) habitats of clear lakes with high water quality are increasingly experiencing unexplained proliferations of filamentous algae that grow on submerged surfaces. These filamentous algal blooms (FABs) are sometimes associa…
View article: The Functional Significance of Bacterial Predators
The Functional Significance of Bacterial Predators Open
Predation structures food webs, influences energy flow, and alters rates and pathways of nutrient cycling through ecosystems, effects that are well documented for macroscopic predators. In the microbial world, predatory bacteria are common…
View article: Foraging modes and movements of <i>Oncorhynchus mykiss</i> as flow and invertebrate drift recede in a California stream
Foraging modes and movements of <i>Oncorhynchus mykiss</i> as flow and invertebrate drift recede in a California stream Open
Salmonids frequently adapt their feeding and movement strategies to cope with seasonally fluctuating stream environments. Oncorhynchus mykiss tend to drift-forage in higher velocity habitat than other salmonids, yet their presence in strea…
View article: Partial migration alters population ecology and food chain length: evidence from a salmonid fish
Partial migration alters population ecology and food chain length: evidence from a salmonid fish Open
Many migratory species, from monarch butterflies to wildebeest, express partial migration, where only a subset of a population migrates. This intraspecific variation is likely to have large ecological consequences. We studied the ecologica…
View article: Clades of huge phage from across Earth’s ecosystems
Clades of huge phage from across Earth’s ecosystems Open
Phage typically have small genomes and depend on their bacterial hosts for replication. DNA sequenced from many diverse ecosystems revealed hundreds of huge phage genomes, between 200 kbp and 716 kbp in length. Thirty-four genomes were man…
View article: Impacts of microbial assemblage and environmental conditions on the distribution of anatoxin-a producing cyanobacteria within a river network
Impacts of microbial assemblage and environmental conditions on the distribution of anatoxin-a producing cyanobacteria within a river network Open
Blooms of planktonic cyanobacteria have long been of concern in lakes, but more recently, harmful impacts of riverine benthic cyanobacterial mats been recognized. As yet, we know little about how various benthic cyanobacteria are distribut…
View article: Widespread anatoxin-a detection in benthic cyanobacterial mats throughout a river network
Widespread anatoxin-a detection in benthic cyanobacterial mats throughout a river network Open
Benthic algae fuel summer food webs in many sunlit rivers, and are hotspots for primary and secondary production and biogeochemical cycling. Concerningly, riverine benthic algal assemblages can become dominated by toxic cyanobacteria, thre…
View article: Effects of the hippopotamus on the chemistry and ecology of a changing watershed
Effects of the hippopotamus on the chemistry and ecology of a changing watershed Open
Significance Hippopotami exert a strong influence on the biogeochemistry and ecology of freshwater ecosystems by excreting terrestrially derived organic matter into these systems. These impacts are likely to be strongly controlled by hydro…
View article: Using prey availability to evaluate Lower Colorado River riparian restoration
Using prey availability to evaluate Lower Colorado River riparian restoration Open
The Lower Colorado River Multi‐species Conservation Program (MSCP) is charged with restoring habitat for 26 species such as the southwestern willow flycatcher ( Empidonax traillii extimus ) impacted by water development projects on the riv…
View article: Microbial diversity and metabolic potential in cyanotoxin producing cyanobacterial mats throughout a river network
Microbial diversity and metabolic potential in cyanotoxin producing cyanobacterial mats throughout a river network Open
Microbial mats formed by Cyanobacteria of the genus Phormidium produce the neurotoxin anatoxin-a that has been linked to animal deaths. Blooms of planktonic Cyanobacteria have long been of concern in lakes, but recognition of potential har…
View article: STUDENT AND FACULTY EXPERIENCE WITH BLENDED LEARNING IN A FIRST-YEAR CHEMISTRY FOR ENGINEERS COURSE
STUDENT AND FACULTY EXPERIENCE WITH BLENDED LEARNING IN A FIRST-YEAR CHEMISTRY FOR ENGINEERS COURSE Open
CHE 102, Chemistry for Engineers, is an introductory chemistry course taken by most engineering students at the University of Waterloo during their first term of study. In an effort to create time for more valuable instructor-student inter…