A5066146362- Marine and fisheries research
- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Marine animal studies overview
- Coral and Marine Ecosystems Studies
- Climate variability and models
- Fish Ecology and Management Studies
- Ocean Acidification Effects and Responses
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Coastal and Marine Management
- Turtle Biology and Conservation
- Arctic and Antarctic ice dynamics
- Species Distribution and Climate Change
- Avian ecology and behavior
- Marine and coastal plant biology
- Geology and Paleoclimatology Research
- Ichthyology and Marine Biology
- Atmospheric and Environmental Gas Dynamics
- Tropical and Extratropical Cyclones Research
- Environmental DNA in Biodiversity Studies
- Meteorological Phenomena and Simulations
- Wildlife Ecology and Conservation
- Cephalopods and Marine Biology
National Oceanic and Atmospheric Administration
2016-2025
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2016-2025
NOAA National Marine Fisheries Service
2015-2025
University of California, Santa Cruz
2016-2024
Norwegian University of Science and Technology
2024
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2010-2022
San Diego State University
2018
Farallon Institute
2010-2017
Woods Hole Oceanographic Institution
2017
Bryan College
2017
Decadal fluctuations in salinity, nutrients, chlorophyll, a variety of zooplankton taxa, and fish stocks the Northeast Pacific are often poorly correlated with most widely‐used index large‐scale climate variability region ‐ Oscillation (PDO). We define new pattern change, North Gyre (NPGO) show that its is significantly previously unexplained nutrients chlorophyll. Fluctuations NPGO driven by regional basin‐scale variations wind‐driven upwelling horizontal advection – fundamental processes...
In 1990, Andrew Bakun proposed that increasing greenhouse gas concentrations would force intensification of upwelling-favorable winds in eastern boundary current systems contribute substantial services to society. Because there is considerable disagreement about whether contemporary wind trends support Bakun's hypothesis, we performed a meta-analysis the literature on intensification. The preponderance published analyses suggests have intensified California, Benguela, and Humboldt upwelling...
We use hydrographic data from the California Cooperative Oceanic Fisheries Investigations program to explore spatial and temporal variability of dissolved oxygen (DO) in southern Current System (CCS) over period 1984–2006. Large declines DO (up 2.1 μ mol/kg/y) have been observed throughout domain, with largest relative occurring below thermocline (mean decrease 21% at 300 m). Linear trends were significant ( p < 0.05) majority stations down 500 m. The hypoxic boundary (∼60 mol/kg) has...
Most spatial marine management techniques (e.g., protected areas) draw stationary boundaries around often mobile features, animals, or resource users. While these approaches can work for relatively resources, to be most effective must as fluid in space and time the resources users we aim manage. Instead, a shift towards dynamic ocean is suggested, defined that rapidly changes response its through integration of near real-time biological, oceanographic, social and/or economic data. Dynamic...
Seafood is an essential source of protein for more than 3 billion people worldwide, yet bycatch threatened species in capture fisheries remains a major impediment to sustainability. Management measures designed reduce often result significant economic losses and even closures. Static spatial management approaches can also be rendered ineffective by environmental variability climate change, as productive habitats shift introduce new interactions between human activities protected species. We...
Abstract The 2015–2016 El Niño is by some measures one of the strongest on record, comparable to 1982–1983 and 1997–1998 events that triggered widespread ecosystem change in northeast Pacific. Here we describe impacts California Current System (CCS) place them historical context using a regional ocean model underwater glider observations. Impacts physical state CCS are weaker than expected based tropical sea surface temperature anomalies; density fields reflect persistence multiyear...
Changes in the amplitude and phasing of seasonal events (phenology) can affect functioning marine ecosystems. Phenology plays a particularly critical role eastern boundary ecosystems, which are driven largely by cycle coastal upwelling. Here we develop describe set indicators that quantify timing, evolution, intensity, duration upwelling California Current large ecosystem (CCLME). There is significant interannual variability characteristics during 1967–2007, with extended periods high...
We have developed a global biogeographic classification of the mesopelagic zone to reflect regional scales over which ocean interior varies in terms biodiversity and function. An integrated approach was necessary, as gaps information variable sampling methods preclude strictly statistical approaches. A panel combining expertise oceanography, geospatial mapping, deep-sea biology convened collate expert opinion on distributional patterns pelagic fauna relative environmental proxies...
Abstract Coastal upwelling is responsible for thriving marine ecosystems and fisheries that are disproportionately productive relative to their surface area, particularly in the world's major eastern boundary systems. Along oceanic boundaries, equatorward wind stress Earth's rotation combine drive a near‐surface layer of water offshore, process called Ekman transport . Similarly, positive curl drives divergence consequently from below, known as suction In both cases, displaced replaced by...
Abstract Upwelling is critical to the biological production, acidification, and deoxygenation of ocean's major eastern boundary current ecosystems. A leading conceptual hypothesis projects that winds induce coastal upwelling will intensify in response increased land‐sea temperature differences associated with anthropogenic global warming. We examine this using an ensemble coupled, ocean‐atmosphere models find limited evidence for intensification upwelling‐favorable or atmospheric pressure...
The IPCC AR5 provided an overview of the likely effects climate change on Eastern Boundary Upwelling Systems (EBUS), stimulating increased interest in research examining issue. We use these recent studies to develop a new synthesis describing impacts EBUS. find that model and observational data suggest coastal upwelling-favorable winds poleward portions EBUS have intensified will continue do so future. Although evidence is weak are presently available, future projections show this pattern...
Dynamic ocean management, or management that uses near real-time data to guide the spatial distribution of commercial activities, is an emerging approach balance resource use and conservation. Employing a wide range types, dynamic can be used meet multiple objectives—for example, managing target quota, bycatch reduction, reducing interactions with species conservation concern. Here, we present several prominent examples highlight utility, achievements, challenges, potential this approach....
In terrestrial systems, the green wave hypothesis posits that migrating animals can enhance foraging opportunities by tracking phenological variation in high-quality forage across space (i.e., “resource waves”). To track resource waves, may rely on proximate cues and/or memory of long-term average phenologies. Although there is growing evidence migrants, such drivers remain unevaluated migratory marine megafauna. Here we present a test system. We compare 10 years blue whale movement data...
Abstract Climate change and increased variability intensity of climate events, in combination with recovering protected species populations highly capitalized fisheries, are posing new challenges for fisheries management. We examine socio-ecological features the unprecedented 2014–2016 northeast Pacific marine heatwave to understand potential causes record numbers whale entanglements central California Current crab fishery. observed habitat compression coastal upwelling, changes availability...
Animal telemetry is a powerful tool for observing marine animals and the physical environments that they inhabit, from coastal continental shelf ecosystems to polar seas open oceans. Satellite-linked biologgers networks of acoustic receivers allow be reliably monitored over scales tens meters thousands kilometres, giving insight into their habitat use, home range size, phenology migratory patterns biotic abiotic factors drive distributions. Furthermore, environmental variables can collected...
Abstract Marine heatwaves (MHWs)—periods of exceptionally warm ocean temperature lasting weeks to years—are now widely recognized for their capacity disrupt marine ecosystems 1–3 . The substantial ecological and socioeconomic impacts these extreme events present significant challenges resource managers 4–7 , who would benefit from forewarning MHWs facilitate proactive decision-making 8–11 However, despite extensive research into the physical drivers 11,12 there has been no comprehensive...
The open ocean twilight zone holds most of the global fish biomass but is poorly understood owing to difficulties measuring subsurface ecosystem processes at scale. We demonstrate that a wide-ranging carnivore—the northern elephant seal—can serve as an sentinel for zone. link basin–scale foraging success with oceanographic indices estimate abundance five decades into past, and future. discovered small variation in maternal amplified larger changes offspring body mass enormous first-year...