Now showing items 1-10 of 183
Characterizing the controls on surface alkalinity in Nootka Sound, British Columbia
[author abstract] Understanding the processes that alter alkalinity in estuarine systems is essential to understanding distributions of surface ocean alkalinity and by extension, atmospheric CO2 levels, as a whole. Biological activity and mixing of distinct riverine sources can alter alkalinity before it reaches the open ...
Tidal flow over a sill in Muchalat Inlet, Nootka Sound, and the resultant mixing processes
[author abstract] The tidal flow over Williamson Sill, situated in Nootka Sound, is analyzed by reviewing the changes in the density and velocity field across the sill and over the tidal cycle. The density is calculated from the raw data collected by UCTD casts while the velocity data was acquired from the ADCP. It was ...
Analyzing drifter designs and data gathering methods in complex estuarine environments
[author abstract] The ability to accurately and consistently map ocean circulation is important for understanding marine processes like sediment transport, pollution distribution, and plankton migration. My study compares three distinct drifter designs and evaluates the effectiveness of each design in terms of build-ability, ...
Growing biofuel outdoors in Seattle: effects of natural light level and temperature on marine microalgal culture density and lipid content in contained natural exposure systems
[author abstract] The effects of natural light and temperature on the growth rate, culture density, and lipid content of marine micro algae species Pavlova lutheri and Pavlova sp. were investigated to potentially lend precedent for further algae growth in the Pacific Northwest. Culture cycles grown in the laboratory and an ...
The influence of salinity and sea star wasting syndrome on sea star species composition and distribution in Nootka Sound, British Columbia
[author abstract] The effect of salinity and Sea Star Wasting Syndrome on the distribution and composition of sea star species was studied in Nootka Sound. Using an underwater camera survey were conducted over four days the Muchalat, Tlupana and Tahsis Inlets of Nootka Sound. These surveys revealed that not only do the sea ...
Beryllium-7 sorption to inorganic particles in Tahsis Inlet, Nootka Sound, B.C.
[author abstract] Sediment deposition from fluvial inputs is one of the main ways new sediment is introduced into seabeds, but many other processes can occur before the sediment reaches the seafloor. Beryllium-7 (⁷Be) is a radioisotope that is produced in the atmosphere, brought down to the earth via rainfall and binds to ...
Zooplankton distributions relative to a shallow hydrothermal plume
This study used acoustic backscattering to locate zooplankton within the water column above and near the shallow seamount, Rumble III. Cofirmed was the earlier finding that zooplankton gather above the plume, but not in the plume. Additionally, sound scattering layers (SSLs) were located at surface waters above the plume, and ...
Chemical dynamics based on methane, light backscatter, and redox potential of hydrothermal plumes at Rumble III, Kermadec arc, New Zealand
This study characterized the chemical ecology of the Rumble III plume by comparing data from CDTO sensors. The plume is 250 meters below the surface of the water. A reduction in oxygen, higher particulate numbers, and reduced chemical species such as methane defined the plume.
Determining geological relationships that lead to the locations of focused and diffuse vents on the Brothers Volcano, using seafloor imaging and EM300 multibeam bathymetry
The Brothers volcano in the Kermadec Arc has an active and extensive hydrothermal venting system. Using multibeam sonar survey and an underwater camera (TowCam), this study documents the geological features association with the Brothers vents. Photographs show the seafloor with its various geological formations.
Synechococcus diversity and ecology in open ocean and coastal environments: a comparison
This project focused on analyzing two specific types of bacteria (clades I and IV) within the genus Synechococcus. Both of these clades were found to be highly abundant in nutrient rich waters and were absent in nutrient poor waters. The ratio between these organisms also shifted from an IV dominated community in the open ...