A5043646221- Marine and fisheries research
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
- Oceanographic and Atmospheric Processes
- Marine and coastal plant biology
- Marine animal studies overview
- Marine Bivalve and Aquaculture Studies
- Microbial Community Ecology and Physiology
- Coastal wetland ecosystem dynamics
- Polar Research and Ecology
- Arctic and Antarctic ice dynamics
- Coastal and Marine Management
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Advanced Computational Techniques and Applications
- Ocean Acidification Effects and Responses
- Arctic and Russian Policy Studies
- Fish Ecology and Management Studies
- Environmental Monitoring and Data Management
- Marine Toxins and Detection Methods
- Island Studies and Pacific Affairs
- Algal biology and biofuel production
- Peatlands and Wetlands Ecology
Oregon State University
2010-2024
Woods Hole Oceanographic Institution
2013-2017
Oceanography Society
2014-2017
Using multiple lines of evidence, we demonstrate that volcanic ash deposition in August 2008 initiated one the largest phytoplankton blooms observed subarctic North Pacific. Unusually widespread transport from a eruption Aleutian Islands, Alaska deposited over much NE Pacific, followed by large increases satellite chlorophyll. Surface ocean pCO 2 , pH, and fluorescence reveal bloom started few days after ashfall. Ship‐based measurements showed increased dominance diatoms. This evidence...
Abstract The biodiversity and high productivity of coastal terrestrial aquatic habitats are the foundation for important benefits to human societies around world. These globally distributed need frequent broad systematic assessments, but field surveys only cover a small fraction these areas. Satellite‐based sensors can repeatedly record visible near‐infrared reflectance spectra that contain absorption, scattering, fluorescence signatures functional phytoplankton groups, colored dissolved...
A new 30-m spatial resolution global shoreline vector (GSV) was developed from annual composites of 2014 Landsat satellite imagery. The semi-automated classification the imagery accomplished by manual selection training points representing water and non-water classes along entire coastline. Polygon topology applied to GSV, resulting in a characterisation number size islands. Three islands were mapped: continental mainlands (5), greater than 1 km2 (21,818), smaller (318,868). GSV represents...
Abstract For terrestrial and marine benthic ecologists, landscape ecology provides a framework to address issues of complexity, patchiness, scale—providing theory context for ecosystem based management in changing climate. Marine pelagic ecosystems are likewise response warming, chemistry, resource exploitation. However, unlike spatial landscapes that migrate slowly with time, seascapes embedded turbulent, advective ocean. Adaptations from must consider the nature scale biophysical...
FACING PAGE.Three-dimensional visualization of the ecological marine units (EMUs) for Banda Sea.EMUs are depicted as bands on cylinders, and pink colors indicate warmer EMUs, where blue represent colder EMUs.On land, global land (ELUs) Sayre et al. (2014) shown.
Climate change is altering global ocean phenology, the timing of annually occurring biological events. We examined changing phenology phytoplankton accumulation season west Antarctic Peninsula to show that blooms are shifting later in over time ice-associated waters. The start date and peak occurred from 1997 2022 marginal ice zone continental shelf. A divergence was seen between offshore waters waters, with bloom becoming earlier, yet shelf later. Higher chlorophyll a (chl ) concentration...
The U.S. Northeast Continental Shelf is experiencing rapid warming, with potentially profound consequences to marine ecosystems. While satellites document multiple scales of spatial and temporal variability on the surface, our understanding status, trends, drivers benthic environmental change remains limited. We interpolated sparse temperature data along New England upper Slope using a seasonally dynamic, regionally specific linear regression model that merged in situ remote sensing data....
Coastal water clarity varies at high temporal and spatial scales due to weather, climate, human activity along coastlines. Systematic observations are crucial assessing the impact of change on aquatic habitats. In this study, Secchi disk depths (ZSD) from Boston Harbor, Buzzards Bay, Cape Cod Narragansett Bay quality monitoring organizations were compiled validate ZSD derived Landsat 8 (L8) imagery, generate resolution maps. From 58 L8 images, acceptable agreement was found between in situ...
Many coastal areas host rich marine ecosystems and are also centers of economic activities, including fishing, shipping recreation. Due to the socioeconomic ecological importance these areas, predicting relevant indicators ecosystem state on sub-seasonal interannual timescales is gaining increasing attention. Depending application, forecasts may be sought for variables spanning physics (e.g., sea level, temperature, currents), chemistry nutrients, oxygen, pH), biology (from viruses top...
The region of the eastern North Pacific coastline dominated by California Current was surveyed annually from 2001‐2003 to examine (1) benthic macro‐invertebrate and algal populations, (2) magnitude patterns key environmental variables, (3) how dynamic populations communities macroalgae invertebrates respond spatial differences in nearshore geomorphology, wave dynamics, oceanography coastal shelf. We used a highly replicated spatially nested sampling design consisting 144 shore segments...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 524:11-26 (2015) - DOI: https://doi.org/10.3354/meps11189 Effect of continental shelf canyons on phytoplankton biomass and community composition along western Antarctic Peninsula M. T. Kavanaugh1,*, F. N. Abdala2, H. Ducklow3, D. Glover1, W. Fraser4, Martinson5, S. Stammerjohn6, O. Schofield7, C. Doney1...
Marine biodiversity is a fundamental characteristic of our planet that depends on and influences climate, water quality, many ocean state variables. It also at the core ecosystem services can make or break economic development in any region. Our purpose to highlight need for marine biological observations inform science conservation management support blue economy. We provide ten recommendations, applicable now, measure forecast Essential Ocean Variables (EOVs) as part monitoring efforts....
Current ocean color sensors, for example SeaWiFS and MODIS, are well suited sampling the open ocean. However, coastal environments spatially optically more complex require frequent higher spatial resolution sensors with additional spectral channels. We have conducted experiments data from Hyperion airborne hyperspectral imagers to evaluate these needs a variety of environments. Here we present results an analysis Harmful Algal Bloom in Monterey Bay. Based on earlier studies recommend...
Benthic primary producer abundance and satellite-derived chlorophyll concentrations are strongly negatively correlated along the Oregon Northern California coast, suggesting an antagonistic interaction. Direct field observations of interannual among-site changes in low intertidal macrophytes also suggest a negative Several years (2001–2006) quantification surf-zone light reaching benthos suggested that severe attenuation from dense phytoplankton blooms is important mechanism underlying this...
Rates of net community production ( NCP ) and air‐sea CO 2 flux in the Northeast Pacific subarctic, transition zone subtropical regions (22°N–50°N, 145°W–152°W) were determined on a cruise August–September 2008 by continuous measurement surface values ratio dissolved oxygen to argon (O /Ar) partial pressure p ). These estimates compared with simultaneous measurements sea temperature (SST), chlorophyll‐a chl ‐ ), flow cytometry, discrete nutrient concentrations. influx greatest subarctic...
Author Posting. © The Oceanography Society, 2014. This article is posted here by permission of Society for personal use, not redistribution. definitive version was published in 27, no. 2 (2014): 18-23, doi:10.5670/oceanog.2014.56.
Abstract Sea surface temperatures of the northwest Atlantic have warmed dramatically over last several decades, while benthic increased at a slower pace. Here we analyze subset CMIP5 global Earth system model ensemble using statistical downscaling approach to determine potential future changes in on continental shelf and slope (<500 m). We put context possible impacts ocean warming high‐value, wild‐caught American Lobster ( Homarus americanus ) fishery. Future bottom under...
Abstract A coupled global numerical simulation (conducted with the Community Earth System Model) is used in conjunction satellite remote sensing observations to examine role of top‐down (grazing pressure) and bottom‐up (light, nutrients) controls on marine phytoplankton bloom dynamics Southern Ocean. Phytoplankton seasonal phenology evaluated context recently proposed “disturbance‐recovery” hypothesis relative more traditional, exclusively “bottom‐up” frameworks. All blooms occur when...
Our synthesis combines inferences from a long-term fisheries monitoring survey and principles of ecosystem oceanography to inform benefit biodiversity modeling studies within the California Current Large Marine Ecosystem. We review history, research, application Rockfish Recruitment Ecosystem Assessment Survey, highlighting how one life can illuminate understanding pelagic patterns function (from micronekton top predators services) that may be easily extended other surveys strengthen...
Global analyses of satellite-and modeled data suggest decreased phytoplankton abundance and primary productivity in oligotrophic gyres as they expand response to increased surface temperatures, shoaling mixed layers, supply subsurface macronutrients. However, concomitant changes have not been evident situ at Hawaii Ocean Time-series (HOT) Station ALOHA, suggesting physiological or structural reorganization observed from space, uncharacterized spatiotemporal variability, uncorrected sensor...
Chinese coastal waters support vast fisheries and vital economies, but their productivity is threatened by increasingly frequent harmful algal blooms (HABs). Here we provide direct experimental evidence that atmospheric deposition, along with riverine input, opens new niches for bloom-forming dinoflagellates diatoms in the East China Sea (ECS) increasing ratio of nitrogen to phosphorus (N:P), inducing severe P limitation, altering trace metal micronutrient inventories. Remote sensing...
Coastal ecosystems are rapidly changing due to human-caused global warming, rising sea level, circulation patterns, ice loss, and acidification that in turn alter the productivity composition of marine biological communities. In addition, regional pressures associated with growing human populations economies result changes infrastructure, land use, other development; greater extraction fisheries natural resources; alteration benthic seascapes; increased pollution; eutrophication....
The western Antarctic Peninsula (WAP) is a bellwether of global climate change and natural laboratory for identifying interactions between ecosystems. Palmer Long-Term Ecological Research (LTER) project has collected data on key ecological environmental processes along the WAP since 1993. To better understand how parameters are changing across space time, we developed novel seascape classification approach based in situ temperature, salinity, chlorophyll a, nitrate + nitrite, phosphate,...