Dale Griffin, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 87
Terrestrial microorganisms at an altitude of 20,000 m in Earth's atmosphere Terrestrial microorganisms at an altitude of 20,000 m in Earth's atmosphere
A joint effort between the U.S. Geological Survey's (USGS) Global Desert Dust and NASA's Stratospheric and Cosmic Dust Programs identified culturable microbes from an air sample collected at an altitude of 20,000 m. A total of 4 fungal (Penicillium sp.) and 71 bacteria colonyforming units (70 colonies of Bacillus luciferensis believed to have originated from a single cell collected at...
Authors
Dale W. Griffin
Pathogenic human viruses in coastal waters Pathogenic human viruses in coastal waters
This review addresses both historical and recent investigations into viral contamination of marine waters. With the relatively recent emergence of molecular biology-based assays, a number of investigations have shown that pathogenic viruses are prevalent in marine waters being impacted by sewage. Research has shown that this group of fecal-oral viral pathogens (enteroviruses, hepatitis A...
Authors
Dale W. Griffin, Kim A. Donaldson, J.H. Paul, Joan B. Rose
Supraglacial sulfur springs and associated biological activity in the Canadian high arctic - signs of life beneath the ice Supraglacial sulfur springs and associated biological activity in the Canadian high arctic - signs of life beneath the ice
Unique springs, discharging from the surface of an arctic glacier, release H2S and deposit native sulfur, gypsum, and calcite. The presence of sulfur in three oxidation states indicates a complex series of redox reactions. Physical and chemical conditions of the spring water and surrounding environment, as well as mineralogical and isotopic signatures, suggest biologically mediated...
Authors
Stephen E. Grasby, Carlton C. Allen, Teresa G. Longazo, John T. Lisle, Dale W. Griffin, Benoit Beauchamp
African and Asian dust: from desert soils to coral reefs African and Asian dust: from desert soils to coral reefs
Many hypotheses have been proposed to explain the decline of coral reefs throughout the world, but none adequately accounts for the lack of recovery of reefs or the wide geographical distribution of coral diseases. The processes driving the decline remain elusive. Hundreds of millions of tons of dust transported annually from Africa and Asia to the Americas may be adversely affecting...
Authors
Virginia H. Garrison, Eugene A. Shinn, William T. Foreman, Dale W. Griffin, Charles W. Holmes, Christina A. Kellogg, Michael S. Majewski, Laurie L. Richardson, Kim B. Ritchie, Garriet W. Smith
Atmospheric transport of mold spores in clouds of desert dust Atmospheric transport of mold spores in clouds of desert dust
Fungal spores can be transported globally in clouds of desert dust. Many species of fungi (commonly known as molds) and bacteria--including some that are human pathogens--have characteristics suited to long-range atmospheric transport. Dust from the African desert can affect air quality in Africa, Europe, the Middle East, and the Americas. Asian desert dust can affect air quality in Asia...
Authors
E.A. Shinn, Dale W. Griffin, D.B. Seba
African dust carries microbes across the ocean: are they affecting human and ecosystem health? African dust carries microbes across the ocean: are they affecting human and ecosystem health?
Atmospheric transport of dust from northwest Africa to the western Atlantic Ocean region may be responsible for a number of environmental hazards, including the demise of Caribbean corals; red tides; amphibian diseases; increased occurrence of asthma in humans; and oxygen depletion (eutrophication) in estuaries. Studies of satellite images suggest that hundreds of millions of tons of...
Authors
Christina A. Kellogg, Dale W. Griffin
Science and Products
Filter Total Items: 87
Terrestrial microorganisms at an altitude of 20,000 m in Earth's atmosphere Terrestrial microorganisms at an altitude of 20,000 m in Earth's atmosphere
A joint effort between the U.S. Geological Survey's (USGS) Global Desert Dust and NASA's Stratospheric and Cosmic Dust Programs identified culturable microbes from an air sample collected at an altitude of 20,000 m. A total of 4 fungal (Penicillium sp.) and 71 bacteria colonyforming units (70 colonies of Bacillus luciferensis believed to have originated from a single cell collected at...
Authors
Dale W. Griffin
Pathogenic human viruses in coastal waters Pathogenic human viruses in coastal waters
This review addresses both historical and recent investigations into viral contamination of marine waters. With the relatively recent emergence of molecular biology-based assays, a number of investigations have shown that pathogenic viruses are prevalent in marine waters being impacted by sewage. Research has shown that this group of fecal-oral viral pathogens (enteroviruses, hepatitis A...
Authors
Dale W. Griffin, Kim A. Donaldson, J.H. Paul, Joan B. Rose
Supraglacial sulfur springs and associated biological activity in the Canadian high arctic - signs of life beneath the ice Supraglacial sulfur springs and associated biological activity in the Canadian high arctic - signs of life beneath the ice
Unique springs, discharging from the surface of an arctic glacier, release H2S and deposit native sulfur, gypsum, and calcite. The presence of sulfur in three oxidation states indicates a complex series of redox reactions. Physical and chemical conditions of the spring water and surrounding environment, as well as mineralogical and isotopic signatures, suggest biologically mediated...
Authors
Stephen E. Grasby, Carlton C. Allen, Teresa G. Longazo, John T. Lisle, Dale W. Griffin, Benoit Beauchamp
African and Asian dust: from desert soils to coral reefs African and Asian dust: from desert soils to coral reefs
Many hypotheses have been proposed to explain the decline of coral reefs throughout the world, but none adequately accounts for the lack of recovery of reefs or the wide geographical distribution of coral diseases. The processes driving the decline remain elusive. Hundreds of millions of tons of dust transported annually from Africa and Asia to the Americas may be adversely affecting...
Authors
Virginia H. Garrison, Eugene A. Shinn, William T. Foreman, Dale W. Griffin, Charles W. Holmes, Christina A. Kellogg, Michael S. Majewski, Laurie L. Richardson, Kim B. Ritchie, Garriet W. Smith
Atmospheric transport of mold spores in clouds of desert dust Atmospheric transport of mold spores in clouds of desert dust
Fungal spores can be transported globally in clouds of desert dust. Many species of fungi (commonly known as molds) and bacteria--including some that are human pathogens--have characteristics suited to long-range atmospheric transport. Dust from the African desert can affect air quality in Africa, Europe, the Middle East, and the Americas. Asian desert dust can affect air quality in Asia...
Authors
E.A. Shinn, Dale W. Griffin, D.B. Seba
African dust carries microbes across the ocean: are they affecting human and ecosystem health? African dust carries microbes across the ocean: are they affecting human and ecosystem health?
Atmospheric transport of dust from northwest Africa to the western Atlantic Ocean region may be responsible for a number of environmental hazards, including the demise of Caribbean corals; red tides; amphibian diseases; increased occurrence of asthma in humans; and oxygen depletion (eutrophication) in estuaries. Studies of satellite images suggest that hundreds of millions of tons of...
Authors
Christina A. Kellogg, Dale W. Griffin