Browsing by Subject "Phytoplankton"
Now showing items 1-20 of 20
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Assessing the Impacts of Simulated Ocean Alkalinity Enhancement on Viability and Growth of Cultures of Near-Shore Species of Phytoplankton
(2023-04-12)Over the past 250 years, atmospheric carbon dioxide concentrations have risen steadily from 277 ppm to 405 ppm, leading to the exacerbation of the effects of climate change. As a result, new technologies are being developed ... -
Biological processes and optical measurements near the sea surface: Some issues relevant to remote sensing
(1995)There is good evidence that bio-optical relationships are altered near the surface: (1) the fluorescence yield from chlorophyll declines, leading to bias in the estimation of pigment from fluorometry; (2) the modeled ... -
Carbon disulfide in the North Atlantic and Pacific Oceans
(American Geophysical Union, Washington, DC, 1999-03)No abstract available. -
A COMPARISON OF VIABILITY AND VITALITY TESTING METHODS AFTER BENCH SCALE UV- AND HEAT-TREATMENT OF THE DIATOM THALASSIOSIRA WEISSFLOGII
(2021-05-05)Thalassiosira weissflogii, a marine diatom, was inactivated using two bench-scale treatment methods: ultraviolet radiation (UV-C) and a water bath (50°C). After treatment with either UV-C or heat, and a 24-hour dark ... -
DEVELOPING A CHLOROPHYLL-BASED PREDICTION MODEL FOR EICOSAPENTAENOIC ACID (EPA) PRODUCTION IN PHYTOPLANKTON
(2020-08-18)Phytoplankton are ideal candidates for sustainable high-scale production of polyunsaturated fatty acids such as eicosapentaenoic acid (EPA). However, a rapid and reliable technique to model EPA production has yet to be ... -
EVALUATING THE POTENTIAL OF USING FOOD-GRADE WASTES TO ENHANCE PRODUCTIVITY OF MIXOTROPHIC SPECIES OF ALGAE.
(2023-04-13)Microalgae industries can produce a large variety of valuable products but are limited by high production costs. Mixotrophic growth, when paired with high-nutrient waste products, provides a solution which can reduce costs ... -
EXPANDING OUR UNDERSTANDING OF MARINE MICROBIOTA IN THE NORTHWEST ATLANTIC AND ARCTIC SECTORS: FROM COASTAL PHYTOPLANKTON TO DIAZOTROPH COMMUNITIES
(2023-04-12)High-resolution ocean time series and strategic sampling in understudied environments provide unique opportunities to advance our knowledge of microbial life in the ocean. The goal of this thesis was to expand our understanding ... -
Inferred influence of nutrient availability on the relationship between Sun-induced chlorophyll fluorescence and incident irradiance in the Bering Sea
(American Geophysical Union, 2000 Florida Ave., N.W. Washington DC 20009 USA, [mailto:service@agu.org], [URL:http://www.agu.org], 2008-08)This study examines variability in the relationship between Sun-induced chlorophyll fluorescence and incident solar irradiance as a potential diagnostic of the nutritional status of phytoplankton. The study site is the ... -
Integration of Observations and Models for an Improved Understanding of Marine Ecosystem Dynamics
(2017-10-03)While both observational and modelling approaches can improve our understanding of ocean ecology, each type of approach has intrinsic limitations. Direct observations have limited temporal/spatial coverage and many quantities ... -
Measurements of methyl chloride in the Northwest Atlantic
(American Geophysical Union, 1994-04)Methyl chloride was measured directly in seawater using a purge and trap system and gas chromatography with electron capture detection. The results indicate that surface waters of the northwest Atlantic are a source of ... -
Methyl iodide in the NW Atlantic; spatial and seasonal variation
(American Geophysical Union, Washington, DC, 2009)While the global ocean is an important source of atmospheric methyl iodide (CH (sub 3) I), the major producers of CH (sub 3) I within the ocean remain unclear. During a seasonal study in the NW Atlantic, the relationship ... -
Photosynthetic characteristics and estimated growth rates indicate grazing is the proximate control of primary production in the Equatorial Pacific
(1992)Macronutrients persist in the surface layer of the equatorial Pacific Ocean because the production of phytoplankton is limited. Measurements of photosynthesis as a function of irradiance (P-I) provide information on the ... -
Primary production of two small lakes in Atlantic Canada
(Dalhousie Printing Centre, 1988-05)At Layton’s lake, Nova Scotia, the total annual primary production was estimated to be 182 gC m<sup>-2</sup> y<sup>-1</sup> of which 87 gC m<sup>-2</sup> y<sup>-1</sup> was planktonic production. Macrophyte production ... -
Relationships between vertical mixing and photoadaptation of phytoplankton: Similarity criteria
(1984-03)In their natural environment phytoplankton are exposed to fluctuations in incident irradiance due to vertical displacements in the water column induced by turbulent fluid motion. A reaction-diffusion model is analyzed to ... -
The Source Apportionment of Airborne Particulate Matter Composition on Sable Island, Nova Scotia, Canada
(2016-04-29)Atmospheric particulate matter has been shown to have acute and chronic health impacts, potential to negatively affect ecosystems, and plays an important role in climate forcing through its role in the formation of cloud ... -
Source Apportionment of Size Resolved Airborne Particulate Matter on Sable Island, Nova Scotia, Canada
(2018-02-08)Marine biogenic VOC rapidly undergo gas-to-particle conversion, and can serve as a significant natural source of ultrafine airborne particulate matter, that can alter global climate. However, the role phytoplankton emissions ... -
Source Sector Analysis of Marine and Other Volatile Organic Compounds on Sable Island, Nova Scotia, Canada
(2017-08-17)Phytoplankton produce approximately 40% of the world’s oxygen and play a critical role in regulating global climate by the drawdown of atmospheric carbon dioxide and, as suggested by increasing evidence, through the emission ... -
Tracking Arctic/Subarctic Export Production Variability Using Compound-Specific Isotope Analysis of Amino Acids
(2024-02-20)The Arctic and subarctic seas have been experiencing dramatic reductions in sea ice extent as a result of climate change. Changes in sea ice extent and surface primary production are expected to impact the timing, composition, ... -
Using metaproteomes and models to quantify cellular trade-offs in phytoplankton
(2021-12-16)Phytoplankton fuel biogeochemical processes in the ocean and are key players influencing the global climate. All biogeochemical processes mediated by microbes are ultimately underpinned by gene expression. In this thesis, ...