marine microbiology
November 13, 2023
North Atlantic’s marine productivity may not be declining, according to new study of older ice cores
To paraphrase Mark Twain, reports of declining phytoplankton in the North Atlantic may have been greatly exaggerated. Analysis of a Greenland ice core going back 800 years shows that atmospheric chemistry, not dwindling phytoplankton populations, explains the recent ice core trends.
September 15, 2023
Polar experiments reveal seasonal cycle in Antarctic sea ice algae
The frigid ocean surrounding Antarctica is home to much of the region’s photosynthetic life. A new University of Washington study provides the first measurements of how sea-ice algae and other single-celled life handle dramatic seasonal swings, offering clues to how this ecosystem might adapt to climate change.
February 1, 2021
Marine organisms use previously undiscovered receptors to detect, respond to light
Single-celled organisms in the open ocean use a diverse array of genetic tools to detect sunlight, even in tiny amounts, and respond. The discovery of these new genetic “light switches” could also aid in the field of optogenetics, in which a cell’s function can be controlled with light exposure.
May 28, 2020
The most common organism in the oceans harbors a virus in its DNA
A new study in Nature Microbiology shows that the most common organism in the world’s oceans — and possibly the whole planet — harbors a virus in its DNA. This virus may have helped it survive and outcompete other organisms. The study began as a UW School of Oceanography senior thesis.
September 4, 2019
New study tracks sulfur-based metabolism in the open ocean
UW oceanographers used lab experiments and seawater samples to learn how photosynthetic microbes and ocean bacteria use sulfur, a plentiful marine nutrient.
May 1, 2019
Arsenic-breathing life discovered in the tropical Pacific Ocean
In oxygen-poor parts of the ocean, some microorganisms survive by breathing arsenic. This holdover from the ancient Earth was not thought to still exist in the open ocean.
November 27, 2018
Threatened tropical coral reefs form complex, ancient associations with bacteria, researchers say
In a comprehensive study of healthy corals published Nov. 22 in the journal Nature Communications, a team of scientists from the University of Washington Bothell, Pennsylvania State University and Oregon State University report that coral bacteria are a surprisingly diverse bunch — and that different sections of the coral body can host unique communities of bacteria.
August 25, 2017
As Tolstoy noted (sort of), all unhappy microbiomes are unhappy in their own way
The bacterial communities that live inside each of our guts are relatively similar when times are good, but when stress enters the equation, those communities can react very differently from person to person.
January 18, 2017
Vitamin B-12, and a knockoff version, create complex market for marine vitamins
Vitamin B-12 exists in two different, incompatible forms in the oceans. An organism thought to supply the essential vitamin B-12 in the marine environment is actually churning out a knockoff version.
July 19, 2016
UW oceanographers grow, sequence genome of ocean microbe important to climate change
A University of Washington team has shed new light on a common but poorly understood bacteria known to live in low-oxygen areas in the ocean. By culturing and sequencing the microbe’s entire genome, the oceanographers found that it significantly contributes to the removal of life-supporting nitrogen from the water in new and surprising ways.
November 19, 2015
Sequencing algae’s genome may aid biofuel production
University of Washington scientists have sequenced the complete genetic makeup of a species of ecologically important algae, which may aid in biofuel production.
June 15, 2015
Genetic switch lets marine diatoms do less work at higher CO2
Oceanographers found the genetic ‘needles in a haystack’ to gain the first hints at how diatoms — tiny drifting algae that carry out a large part of Earth’s photosynthesis — detect and respond to increasing carbon dioxide from burning of fossil fuels.
May 27, 2015
Invisible helpers of the sea: Marine bacteria boost growth of tiny ocean algae
Using seawater collected in Seattle, Whidbey Island and other sites, UW oceanographers show that just as with plants on land, a common species of ocean diatom grows faster in the presence of helpful bacteria.
February 24, 2014
Vitamin water: Measuring essential nutrients in the ocean
Oceanographers have found that archaea, a type of marine microbe, can produce B-12 vitamins in the ocean.
December 17, 2012
Plumes across the Pacific deliver thousands of microbial species to West Coast
Microorganisms – 99 percent more kinds than had been reported in findings published just four months ago – are hitching rides in the upper troposphere from Asia.
