A5020860487- Fish Ecology and Management Studies
- Marine and fisheries research
- Isotope Analysis in Ecology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Soil and Water Nutrient Dynamics
- Aquatic Invertebrate Ecology and Behavior
- Species Distribution and Climate Change
- Hydrology and Watershed Management Studies
- Wildlife Ecology and Conservation
- Hydrology and Sediment Transport Processes
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Biodiversity
- Marine Bivalve and Aquaculture Studies
- Ecology and biodiversity studies
- Water Quality and Pollution Assessment
- Freshwater macroinvertebrate diversity and ecology
- Genetic and phenotypic traits in livestock
- Genetic diversity and population structure
- Coral and Marine Ecosystems Studies
- Environmental DNA in Biodiversity Studies
- Ecosystem dynamics and resilience
- Arctic and Antarctic ice dynamics
- Marine animal studies overview
- Geology and Paleoclimatology Research
University of Washington
2016-2025
Film Independent
2025
Seattle University
2007-2023
John Wiley & Sons (United States)
2016-2019
Hudson Institute
2019
Robert Bosch (Germany)
2017-2018
NOAA National Marine Fisheries Service
2009-2018
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2009-2018
Technical Solutions (United States)
2018
Providence College
2018
Abstract In this first worldwide synthesis of in situ and satellite‐derived lake data, we find that summer surface water temperatures rose rapidly (global mean = 0.34°C decade −1 ) between 1985 2009. Our analyses show warming rates are dependent on combinations climate local characteristics, rather than just location, leading to the counterintuitive result regional consistency is exception, rule. The most lakes widely geographically distributed, their associated with interactions among...
A classic example of a sustainable fishery is that targeting sockeye salmon in Bristol Bay, Alaska, where record catches have occurred during the last 20 years. The stock complex an amalgamation several hundred discrete spawning populations. Structured within lake systems, individual populations display diverse life history characteristics and local adaptations to variation rearing habitats. This biocomplexity has enabled aggregate sustain its productivity despite major changes climatic...
The largest uncertainty in forecasting the effects of climate change on ecosystems is understanding how it will affect nature interactions among species. Climate may have unexpected consequences because different species show unique responses to changes environmental temperatures. Here we that increasingly warmer springs since 1962 disrupted trophic linkages between phytoplankton and zooplankton a large temperate lake differing sensitivity vernal warming. timing thermal stratification spring...
Lakes are complex ecosystems composed of distinct habitats coupled by biological, physical and chemical processes. While the ecological evolutionary characteristics aquatic organisms reflect habitat coupling in lakes, ecology has largely studied pelagic, benthic riparian isolation from each other. Here, we summarize several patterns that highlight importance discuss their implications for understanding ecosystem processes lakes. We pay special attention to fishes because they play...
Responses of zooplankton, pelagic primary producers, planktonic bacteria, and CO2 exchange with the atmosphere were measured in four lakes contrasting food webs under a range nutrient enrichments during seven-year period. Prior to enrichment, manipulated create contrasts between piscivore dominance planktivore dominance. Nutrient inorganic nitrogen phosphorus exhibited ratios N:P > 17:1, by atoms, maintain P limitation. An unmanipulated reference lake, Paul Lake, revealed baseline...
Phenotypic plasticity plays a key role in modulating how environmental variation influences population dynamics, but we have only rudimentary understanding of interacts with the magnitude and predictability to affect dynamics persistence. We developed stochastic individual-based model, which phenotypes could respond temporally fluctuating cue fitness depended on match between phenotype randomly trait optimum, assess absolute dynamic consequences under different levels stochasticity...
Abstract Populations living in seasonal environments are exposed to systematic changes physical conditions that restrict the growth and reproduction of many species only a short time window annual cycle. Several studies have shown climate over latter part 20th century affected phenology population dynamics single species. However, key limitation forecasting effects changing on ecosystems lies understanding how it will affect interactions among We investigated climatic biotic drivers...
Abstract: Climate change affects individual organisms by altering development, physiology, behavior, and fitness, populations genetic phenotypic composition, vital rates, dynamics. We sought to clarify how selection, plasticity, demography are linked in the context of climate change. On basis theory results recent empirical studies plants animals, we believe ecological evolutionary issues relevant population persistence as changes rate, type, magnitude, spatial pattern climate-induced...
Emphasize robustness, monitoring, and flexibility
Abstract Global environmental change has influenced lake surface temperatures, a key driver of ecosystem structure and function. Recent studies have suggested significant warming water temperatures in individual lakes across many different regions around the world. However, spatial temporal coherence associated with magnitude these trends remains unclear. Thus, global data set temperature is required to understand synthesize global, long-term inland bodies water. We assembled database summer...
Top predators and nutrient loading in lakes were manipulated to assess the influence of food web structure on carbon flux between atmosphere. Nutrient enrichment increased primary production, causing become net sinks for atmospheric (C atm ). Changes top caused shifts grazers. At identical loading, C invasion was greater a lake with low grazing than one high grazing. Carbon stable-isotope distributions corroborated drawdown dioxide traced transfer from algae predators. Thus, altered...
Coarse woody debris (CWD) is a critical input from forested watersheds into aquatic ecosystems. Human activities often reduce the abundance of CWD in fluvial systems, but little known about human impacts on lakes. We surveyed 16 north temperate lakes to assess relationships among CWD, riparian vegetation, and shoreline residential development. found strong positive correlation between density tree (r 2 = 0.78), negative cabin 0.71) at whole‐lake scale. At finer spatial scales (e.g., sampling...
Fishes are important pools of nitrogen (N) and phosphorus (P), they have direct indirect effects on cycling these potentially limiting nutrients in lakes. We used a model fish bioenergetics coupled to mass balance N P budgets investigate the stoichiometric interactions among fishes, their food, nutrient recycling that results from this predator–prey interaction. tested hypothesis N:P ratios excretion (supply ratios) high but variable because fishes' requirement likelihood limitation growth....
We assessed the effects of trophic structure on phosphorus (P) recycling by fishes, Chaoborus, and zooplankton in lakes with different food web configurations. Fishes a piscivoredominated system recycled little P compared to that regenerated Chaoborus. In plan ktivore-dominated lake, excretion fishes (especially young year) dominated algae; Chaoborus was decreased due intense predation fishes. The sum incorporated into primary production lost sedimentation piscivore-dominated lake only 77%...
We present a Bayesian statistical model of diel oxygen dynamics in aquatic ecosystems to simultaneously estimate gross primary production, ecosystem respiration, and exchange with the atmosphere (and their uncertainties) on basis changes dissolved concentration, water temperature, irradiance, and, if desired, 18 O 16 ratio (δ O‐O 2 ). test this using simulated data realistic measurement errors demonstrate that it accurately estimates parameters parameter uncertainties correctly scale error...
Abstract Interpopulation variation in dynamics can buffer species against environmental change. We compared population synchrony a group of threatened Chinook salmon the highly impacted Snake River basin (Oregon, Washington, Idaho) to that sockeye stock complex less impact Bristol Bay (Alaska). Over last 40 years, >90% populations became more synchronized with one another. However, over period, from Alaska did not exhibit systemic changes synchrony. Coincident increasing synchrony, there...
Vertical heterogeneity in the physical characteristics of lakes and oceans is ecologically salient exploited by a wide range taxa through diel vertical migration to enhance their growth survival. Whether analogous behaviors exploit horizontal habitat streams largely unknown. We investigated fish movement behavior at daily timescales explore how individuals integrated across spatial variation food abundance water temperature. Juvenile coho salmon made feeding forays into cold habitats with...
Evolutionary adaptation affects demographic resilience to climate change but few studies have attempted project changes in selective pressures or quantify impacts of trait responses on population dynamics and extinction risk. We used a novel individual-based model explore potential evolutionary migration timing the consequences for persistence sockeye salmon Oncorhynchus nerka Fraser River, Canada, under scenarios future warming. Adult are highly sensitive increases water temperature during...