A5070157388- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Oceanographic and Atmospheric Processes
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Marine and fisheries research
- Atmospheric and Environmental Gas Dynamics
- Climate change and permafrost
- Ocean Acidification Effects and Responses
- Soil and Water Nutrient Dynamics
- Identification and Quantification in Food
- Coastal wetland ecosystem dynamics
- Aquatic Invertebrate Ecology and Behavior
- Atmospheric Ozone and Climate
- Genetic and phenotypic traits in livestock
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Geology and Paleoclimatology Research
- Climate variability and models
- Groundwater and Isotope Geochemistry
- Aquatic Ecosystems and Phytoplankton Dynamics
- Genetic diversity and population structure
- Marine and coastal plant biology
Tula Foundation
2023-2025
Hakai Institute
2023-2025
Woods Hole Oceanographic Institution
2014-2023
University of Victoria
2012
Abstract The genus Phaeocystis is distributed globally and has considerable ecological, biogeochemical, societal impacts. Understanding its distribution, growth ecological impacts been limited by lack of extensive observations on appropriate scales. In 2018, we investigated the biological dynamics New England continental shelf encountered a substantial bloom pouchetii . Based satellite imagery during January through April, extended over broad expanses shelf; furthermore, our demonstrated...
Large changes in marine CO2 chemistry manifest areas with weakly-buffered seawater where ocean acidification (OA) acts concert natural additions. These settings can exhibit periods of extreme OA the form multiple co-occurring stressors, including calcite undersaturation and low pH. Such conditions were observed northern Strait Georgia, on northeast Pacific coast, spanned a 3-year period. Here, we utilized an 8-year, highly-resolved record partial pressure total dissolved inorganic carbon to...
Coastal ecosystems host high levels of primary productivity leading to exceptionally dynamic elemental cycling in both water and sediments. In such environments, carbon is rapidly cycled rates burial as organic matter and/or loss the atmosphere laterally coastal ocean simpler forms, dioxide (CO2) methane (CH4). To better understand across these heterogeneous new technologies beyond discrete sample collection analysis are needed characterize spatial temporal variability. Here, we describe...
Abstract. Because of its temperate location, high dynamic range environmental conditions, and extensive human activity, the long-term ecological research site in coastal Northeastern US Shelf (NES) northwestern Atlantic Ocean offers an ideal opportunity to understand how productivity shifts response changes planktonic community composition. production trophic transfer rates, including net (NCP), primary (NPP), gross oxygen (GOP), microzooplankton grazing are key metrics for understanding...
The Arctic Ocean is changing rapidly as the global climate warms but it not well known how these changes are affecting biological productivity and carbon cycle. Here we study Beaufort Gyre region of Canada Basin in August use large reduction summertime sea ice extent from 2011 to 2012 investigate potential impacts warming on productivity. We gas tracers O2/Ar triple oxygen isotopes quantify rates net community production (NCP) gross (GOP) gyre. Comparison summer with 2012, latter which had...
Abstract The Arctic Ocean is experiencing profound environmental changes as the climate warms. Understanding how these will affect biological productivity key for predicting future ecosystems and global CO 2 balance. Here we use in situ gas measurements to quantify rates of gross oxygen production (GOP, total photosynthesis) net community (NCP, drawdown by pump) mixed layer summer or fall from 2011 2016 Beaufort Gyre. NCP GOP show spatial temporal variations with higher values linked lower...
Abstract The balance of marine autotrophy and heterotrophy regulates the ocean's ability to serve as a CO 2 sink, organic material produced by autotrophs sinks into ocean interior drive biological pump. Marine ecosystems over continental margins, especially coastal upwelling regions, account for disproportionate amount carbon export; thus, even small fluctuations in export these regions can have large impact on global cycle. In this study, we estimated rate gross oxygen production (GOP),...
Abstract Measurement of the triple oxygen isotope (TOI) composition O 2 is an established method for quantifying gross production (GOP) in natural waters. A standard assumption to this that isotopic H O, substrate photosynthetic , equivalent Vienna mean ocean water (VSMOW). We present and validate a estimating TOI based on mixing local meteoric seawater end‐members, incorporating into GOP estimates. In ocean, estimates assuming VSMOW can have systematic errors up 48% low‐salinity systems, be...
Abstract. Ocean production and trophic transfer rates, including Net Community Production (NCP), Primary (NPP), Gross Oxygen (GOP), microzooplankton grazing rates are key metrics for understanding marine ecosystem dynamics impacts on biogeochemical cycles. Because of its temperate location high dynamic range environmental conditions long-term human utilization, the ecological research site in coastal Northeastern U.S. Shelf (NES) Northwestern Atlantic offers an ideal opportunity to...