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Articles 1 - 4 of 4
Full-Text Articles in Marine Biology
Potential Virus-Mediated Nitrogen Cycling In Oxygen-Depleted Oceanic Waters, M. Consuelo Gazitúa, Dean R. Vik, Simon Roux, Ann C. Gregory, Benjamin Bolduc, Brittany Widner, Margaret R. Mulholland, Steven J. Hallam, Osvaldo Ulloa, Matthew B. Sullivan
Potential Virus-Mediated Nitrogen Cycling In Oxygen-Depleted Oceanic Waters, M. Consuelo Gazitúa, Dean R. Vik, Simon Roux, Ann C. Gregory, Benjamin Bolduc, Brittany Widner, Margaret R. Mulholland, Steven J. Hallam, Osvaldo Ulloa, Matthew B. Sullivan
OES Faculty Publications
Viruses play an important role in the ecology and biogeochemistry of marine ecosystems. Beyond mortality and gene transfer, viruses can reprogram microbial metabolism during infection by expressing auxiliary metabolic genes (AMGs) involved in photosynthesis, central carbon metabolism, and nutrient cycling. While previous studies have focused on AMG diversity in the sunlit and dark ocean, less is known about the role of viruses in shaping metabolic networks along redox gradients associated with marine oxygen minimum zones (OMZs). Here, we analyzed relatively quantitative viral metagenomic datasets that profiled the oxygen gradient across Eastern Tropical South Pacific (ETSP) OMZ waters, assessing whether OMZ …
Isolation, Structure Elucidation, And Synthesis Of Natural Products From Marine Cyanobacteria, Keren Solomon
Isolation, Structure Elucidation, And Synthesis Of Natural Products From Marine Cyanobacteria, Keren Solomon
Electronic Theses and Dissertations
This thesis describes the isolation, structure elucidation, and synthesis of natural products from marine cyanobacteria. A crude extract from a cyanobacterium collected in Curacao showed selective affinity for the dopamine D5 receptor in a screen against a panel of CNS receptors. Due to the high similarity of the D5 and D1 receptor, to date there are no known ligands that differentiate them. Attempts to purify the compound responsible for this affinity led to the isolation of the known compound caylobolide A. A second extract from a cyanobacterium collected in Panama underwent bioassay-guided fractionation and yielded the novel …
Bloom Announcement: An Early Autumn Cyanobacterial Bloom Co-Dominated By Aphanizomenon Flos-Aquae And Planktothrix Agardhii In An Agriculturally-Influenced Great Lakes Tributary (Thames River, Ontario, Canada), R. Michael Mckay, Thijs Frenken, Ngan Diep, William R. Cody, Sophie Crevecoeur, Alice Dove, Kenneth G. Drouillard, Xavier Ortiz, Jason Wintermute, Arthur Zastepa
Bloom Announcement: An Early Autumn Cyanobacterial Bloom Co-Dominated By Aphanizomenon Flos-Aquae And Planktothrix Agardhii In An Agriculturally-Influenced Great Lakes Tributary (Thames River, Ontario, Canada), R. Michael Mckay, Thijs Frenken, Ngan Diep, William R. Cody, Sophie Crevecoeur, Alice Dove, Kenneth G. Drouillard, Xavier Ortiz, Jason Wintermute, Arthur Zastepa
Great Lakes Institute for Environmental Research Publications
No abstract provided.
The Complicated And Confusing Ecology Of Microcystis Blooms, Steven W. Wilhelm, George S. Bullerjahn, R. Michael L. Mckay
The Complicated And Confusing Ecology Of Microcystis Blooms, Steven W. Wilhelm, George S. Bullerjahn, R. Michael L. Mckay
Great Lakes Institute for Environmental Research Publications
Blooms of the toxin-producing cyanobacterium Microcystis are increasing globally, leading to the loss of ecosystem services, threats to human health, as well as the deaths of pets and husbandry animals. While nutrient availability is a well-known driver of algal biomass, the factors controlling “who” is present in fresh waters are more complicated. Microcystis possesses multiple strategies to adapt to temperature, light, changes in nutrient chemistry, herbivory, and parasitism that provide a selective advantage over its competitors. Moreover, its ability to alter ecosystem pH provides it a further advantage that helps exclude many of its planktonic competitors. While decades of nutrient …