Figure 2 from the 2012 publication, "Arrival and Expansion of the Invasive Foraminifera Trochammina hadai Uchio in Padilla Bay, Washington," by McGann, et al. Trochammina hadai Uchio: A, dorsal view; B, edge view; C, ventral view.
Mary McGann (Former Employee)
Science and Products
Sediment Transport in Coastal Environments
Our research goals are to provide the scientific information, knowledge, and tools required to ensure that decisions about land and resource use, management practices, and future development in the coastal zone and adjacent watersheds can be evaluated with a complete understanding of the probable effects on coastal ecosystems and communities, and a full assessment of their vulnerability to natural...
Transport of invasive microorganisms
The objectives of his project are to investigate the vectors and timing of microbiological invasions and the subsequent dispersal of these non-native organisms due to sediment transport. We will attempt to confirm the identification of specific invasives encountered with molecular sequencing, monitor the spread of the invading populations through their recent distribution and the historic...
Coastal and Marine Geohazards of the U.S. West Coast and Alaska
Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Filter Total Items: 15
Radiochemistry (210Pb and 137Cs) of cores BC01 and BC02 obtained in 2024 off Alameda and Point Isabel in San Francisco Bay, California Radiochemistry (210Pb and 137Cs) of cores BC01 and BC02 obtained in 2024 off Alameda and Point Isabel in San Francisco Bay, California
This data release provides radiochemistry data (210Pb and 137Cs) of two sediment cores, BC01 and BC02, collected during USGS Field Activity 2024-662-FA in 2024 in San Francisco Bay, California, U.S.A., off Alameda and Point Isabel, respectively.
Census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio obtained in 1983-2010 in San Francisco Bay, California Census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio obtained in 1983-2010 in San Francisco Bay, California
This data release provides census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio in surface sediment samples obtained in San San Francisco Bay, California from 1983-2010.
Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone
Results of radiocarbon age dating of planktic foraminifera, benthic foraminifera, and pelecypod shell fragments collected from piston cores, trigger weight cores, and IKU grab samples obtained in 2015 and 2017 offshore British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone.
Sediment core data from offshore southern Cascadia during field activity 2019-643-FA Sediment core data from offshore southern Cascadia during field activity 2019-643-FA
This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data. Sediment cores were collected offshore northern California during U.S. Geological Survey cruise 2019-643-FA aboard the M/V Bold-Horizon. The cores were collected along with geophysical data to evaluate potential hazards (e.g., active fault systems, slope
Radiocarbon age dating of biological material from cores collected off central California in 1999, 2006, and 2019 Radiocarbon age dating of biological material from cores collected off central California in 1999, 2006, and 2019
Results of radiocarbon age dating of planktic and benthic foraminifera collected from cores obtained in 1999, 2006, and 2019 offshore central California in the vicinity of Morro Bay.
Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay
The urbanized area of downtown Menlo Park is subject to persistent flooding and sediment deposition by San Francisquito Creek in South San Francisco Bay. To mitigate these events, a suite of cores was collected in 2002 at the mouth of the creek to determine sediment depositional rates on the delta. One of those cores (721-1) was selected for microbiological (pollen, diatoms, and...
Digital maps of submarine landslides and mass wasting features offshore of southern California Digital maps of submarine landslides and mass wasting features offshore of southern California
This data release provides the locations and certain key metrics of landslide features offshore southern California, including landslide perimeters, scarps, evacuation zones, debris aprons, and slide-prone areas in geographic information system (GIS) shapefile format. The offshore region of southern California is a tectonically active area that includes more than 20 fault-bounded basins...
Grain-size data from core S3-15G, Monterey Fan, Central California Grain-size data from core S3-15G, Monterey Fan, Central California
This data release supersedes version 1.0, published in October 2021 at https://doi.org/10.5066/F74F1NW7. Versioning details are documented in the accompanying VersionHistory_P9DZ321R.txt file. This data release presents sediment grain-size data from samples collected from core S3-15G, a 4.72-m long gravity core collected at a depth of 3,491 meters on the western levy of the Monterey Fan...
Census counts of benthic foraminifera, environmental parameters (temperature, salinity, and oxygen concentration), and radiocarbon measurements from cores obtained under and near a whale-fall off western Vancouver Island, British Columbia, Canada Census counts of benthic foraminifera, environmental parameters (temperature, salinity, and oxygen concentration), and radiocarbon measurements from cores obtained under and near a whale-fall off western Vancouver Island, British Columbia, Canada
This data release provides census counts of benthic foraminifera (in percent for the total fauna and as raw counts for just the living specimens) as well as environmental parameters (temperature, salinity, and oxygen concentration) at the sampling sites, and radiocarbon measurements from selected push core samples obtained under and near a whale-fall off western Vancouver Island, British...
Grain-size data from core S3-15G, Monterey Fan, Central California Grain-size data from core S3-15G, Monterey Fan, Central California
This data release presents sediment grain-size data from samples collected from core S3-15G, a 4.72-m long gravity core collected at a depth of 3,491 meters on the western levy of the Monterey Fan on May 31, 1978 (USGS Field Activity S-3-78-SC).
Geophysical properties, geochronologic, and geochemical data of sediment cores collected from San Pablo Bay, California, October 17-20, 2016 Geophysical properties, geochronologic, and geochemical data of sediment cores collected from San Pablo Bay, California, October 17-20, 2016
Geophysical properties (P-wave velocity, gamma ray density, and magnetic susceptibility), geochronologic (radiocarbon, excess Lead-210, and Cesium-137), and geochemical data (organic carbon content and 60 element contents) are reported for select vibracores collected aboard the S/V Retriever October 17-20, 2016 in San Pablo Bay, California. Geophysical properties were measured with a...
Donated ROV vibracore and sampling data collected during Monterey Bay Aquarium Research Institute cruises in 2019 offshore of south-central California Donated ROV vibracore and sampling data collected during Monterey Bay Aquarium Research Institute cruises in 2019 offshore of south-central California
This dataset includes photographs of vibracores that were collected by the Monterey Bay Aquarium Research Institute (MBARI) in February 2019 and November 2019 aboard the R/V Western Flyer using the remotely operated vehicle (ROV) Doc Ricketts. The collection of these cores was funded entirely by MBARI, and the cores have been donated to the U.S. Geological Survey (USGS). The cores were...
Figure 2 from the 2012 publication, "Arrival and Expansion of the Invasive Foraminifera Trochammina hadai Uchio in Padilla Bay, Washington," by McGann, et al. Trochammina hadai Uchio: A, dorsal view; B, edge view; C, ventral view.
Filter Total Items: 75
Analysis of a human-mediated microbioinvasion: The global spread of the benthic foraminifer Trochammina hadai Uchio, 1962 Analysis of a human-mediated microbioinvasion: The global spread of the benthic foraminifer Trochammina hadai Uchio, 1962
A non-indigenous species (NIS) of benthic foraminifera was first identified in a core collected in 1993 in San Francisco Bay, California, USA, and subsequently identified as Trochammina hadai Uchio, 1962. Archived samples and literature reviews were used to determine that the species, which is native to Asia, arrived in San Francisco Bay between the early 1960s and 1983. Through...
Authors
Mary McGann, Maria Holzmann, Vincent Bouchet, Sibelle Disaró, Patricia Eichler, David Haig, Stephen Himson, Hiroshi Kitazato, Jean-Charles Pavard, Irina Polovodova Asteman, Andre Rodrigues, Clement Tremblin, Masashi Tsuchiya, Mark Williams, Phoebe O'Brien, Josefin Asplund, Malou Axelsson, Thomas Lorenson
Leisure boat harbours, hidden alien species, and pollution: A case study of Hinsholmskilen harbour (Gothenburg, Sweden) Leisure boat harbours, hidden alien species, and pollution: A case study of Hinsholmskilen harbour (Gothenburg, Sweden)
Small leisure boat harbours have important aesthetic and recreational values in any country with a coastline. In Sweden, there are about 860 000 leisure boats, which is one of the world's highest numbers in relation to the country's population. However, small boat harbours also present a wide range of environmental problems, including the introduction of alien species and high pollution...
Authors
Irina Polovodova Asteman, Emilie Jaffre, Agata Olejnik, Maria Holzmann, Mary McGann, Kjell Nordberg, Jean-Charles Pavard, Delia Rosel, Magali Schweizer
Palaeontological signatures of the Anthropocene are distinct from those of previous epochs Palaeontological signatures of the Anthropocene are distinct from those of previous epochs
The “Great Acceleration” beginning in the mid-20th century provides the causal mechanism of the Anthropocene, which has been proposed as a new epoch of geological time beginning in 1952 CE. Here we identify key parameters and their diagnostic palaeontological signals of the Anthropocene, including the rapid breakdown of discrete biogeographical ranges for marine and terrestrial species...
Authors
Mark Williams, Jan Zalasiewicz, Anthony Barnosky, Reinhold Leinfelder, Martin Head, Colin Waters, Francine McCarthy, Alejandro Cearreta, David Aldridge, Mary McGann, Bruce Hamilton, Colin Summerhayes, Jaia Syvitski, Jens Zinke, Andrew Cundy, Barbara Fialkiewicz-Koziel, J.R. McNeill, Michinobu Kuwae, Neil Rose, Simon Turner, Yoshiki Saito, Michael Wagreich, M. Stegner, Moriaki Yasuhara, Yongming Han, Amy Wrisdale, Rachael Holmes, Juan Berrio
Pockmarks offshore Big Sur, California provide evidence for recurrent, regional, and unconfined sediment gravity flows Pockmarks offshore Big Sur, California provide evidence for recurrent, regional, and unconfined sediment gravity flows
Recent surface ship multibeam surveys of the Sur Pockmark Field, offshore Central California, reveal >5,000 pockmarks in an area that is slated to host a wind farm, between 500- and 1,500-m water depth. Extensive fieldwork was conducted to characterize the seafloor environment and its recent geologic history, including visual observations with remotely operated vehicles, sediment core...
Authors
E. Lundsten, Charles Paull, R. Gwiazda, S. Dobbs, D.W. Caress, Linda Kuhnz, M. Walton, N. Nieminski, Mary McGann, Thomas Lorenson, Guy Cochrane, Jason Addison
A comprehensive assessment of submarine landslides and mass wasting processes offshore southern California A comprehensive assessment of submarine landslides and mass wasting processes offshore southern California
It is critical to characterize submarine landslide hazards near dense coastal populations, especially in areas with active faults, which can trigger slope failure, subsequent tsunamis, and damage seabed infrastructure during earthquake shaking. Offshore southern California, numerous marine geophysical surveys have been conducted over the past decade, and high-resolution bathymetric and...
Authors
M. Walton, James Conrad, Antoinette Papesh, Daniel S. Brothers, Jared W. Kluesner, Mary McGann, Peter Dartnell
First Occurrence of the nonindigenous Asian foraminifera Ammonia confertitesta in the Northeastern Pacific Ocean: Vancouver Island, British Columbia, Canada First Occurrence of the nonindigenous Asian foraminifera Ammonia confertitesta in the Northeastern Pacific Ocean: Vancouver Island, British Columbia, Canada
Observations in 2022 of intertidal and subtidal foraminiferal faunas at four localities along the central-eastern side of Vancouver Island, British Columbia, Canada, and molecular analyses have documented the first occurrence of the nonindigenous Asian species Ammonia confertitesta Zheng in the northwestern Pacific Ocean. The species was present at three of these localities: Davis Lagoon...
Authors
Mary McGann, Maria Holzmann
Where ice gave way to fire: Deglacial volcanic activity at the edge of the Coast Mountains in Milbanke Sound, BC Where ice gave way to fire: Deglacial volcanic activity at the edge of the Coast Mountains in Milbanke Sound, BC
Kitasu Hill and MacGregor Cone formed along the Principe Laredo Fault on British Columbia’s central coast as the Wisconsinan ice sheet withdrew from the Coast Mountains. These small-volume Milbanke Sound Volcanoes (MSV) provide remarkable evidence for the intimate relationship between volcanic and glacial facies. The lavas are within-plate, differentiated (low MgO
Authors
Tark Hamilton, Randolph J. Enkin, Zhen Li, Jan M. Bednarski, Cooper Stacey, Mary McGann, Britta Jensen
The invasive Asian benthic foraminifera Trochammina hadai Uchio, 1962: Identification of a new local in Normandy (France) and a discussion on its putative introduction pathways The invasive Asian benthic foraminifera Trochammina hadai Uchio, 1962: Identification of a new local in Normandy (France) and a discussion on its putative introduction pathways
The invasive benthic foraminifera Trochammina hadai has been found for the first time in Europe along the coast of Normandy. Its native range of distribution is in Asia (Japan and Korea), and it has also been introduced along the coasts of western North America, Brazil and Australia. Morphological and molecular assessments confirm that specimens found in Le Havre and Caen-Ouistreham...
Authors
Vincent Bouchet, Jean-Charles Pavard, Maria Holzmann, Mary McGann, Eric Armynot de Chatelet, Apolyne Courleux, Jean-Phillipe Pezy, Jean-Claude Dauvin, Laurent Seuront
Sediment gravity flow frequency offshore central California diminished significantly following the Last Glacial Maximum Sediment gravity flow frequency offshore central California diminished significantly following the Last Glacial Maximum
A high-resolution multibeam survey from a portion of the San Simeon Channel (offshore Morro Bay, California) captured a zone of recurring troughs and ridges adjacent to prominent submarine meander bends. Through an integrated study using surveying data, sediment core analysis, radiocarbon dating, and stable isotope measurements, we hypothesize that turbidity current event frequency was...
Authors
Stephen Dobbs, Charles Paull, Eve Lundsten, Roberto Gwiazda, David Caress, Mary McGann, Marianne Coholich, Maureen Walton, Nora Nieminski, Timothy McHargue, Steven Graham
The San Francisco Estuary, USA as a reference section for an Anthropocene series The San Francisco Estuary, USA as a reference section for an Anthropocene series
A San Francisco Estuary core was analysed at high resolution to assess its component stratigraphic signatures of the Anthropocene in the form of non-native species, Hg, spheroidal carbonaceous particles, δ13Corg, δ15N, radiogenic materials, and heavy metals. Time series analysis of the core using Ti data provides a chronology to depth 167 cm into the 1960s. Below this, to depth 230 cm...
Authors
Stephen Himson, Mark Williams, Jan Zalasiewicz, Colin Waters, Mary McGann, Richard England, Bruce Jaffe, Arnoud Boom, Rachael Holmes, Sue Sampson, Cerin Pye, Juan Berrio, Genevieve Tyrrell, Ian Wilkinson, Neil Rose, Pawel Gaca, Andrew Cundy
Affinity of the benthic foraminifer Cassidulinoides parkeriana (Brady) for whale-falls: Evidence from off western Vancouver Island, British Columbia, Canada Affinity of the benthic foraminifer Cassidulinoides parkeriana (Brady) for whale-falls: Evidence from off western Vancouver Island, British Columbia, Canada
A partial skeleton of a blue or fin whale, estimated to have been 16.5 m in length and thought to have been lying on the seafloor for less than 10 years, was observed at a depth of 1288 m off western Vancouver Island, British Columbia, Canada (48.68° N, 126.84° W). Four push cores were taken at the site, three (15-26 cm in length) directly under caudal vertebrae and one 18 cm long...
Authors
Mary McGann, Charles Paull
Planetary-scale change to the biosphere signalled by global species translocations can be used to identify the Anthropocene Planetary-scale change to the biosphere signalled by global species translocations can be used to identify the Anthropocene
We examine three distinctive biostratigraphic signatures associated with: hunting and gathering, landscape domestication, and globalisation. All three signatures have significant fossil records of regional importance that can be correlated inter-regionally and help describe the developing pattern of human expansion and appropriation of resources. While none have individual first or last
Authors
Mark Williams, Reinhold Leinfelder, Anthony Barnosky, Martin J Head, Francine McCarthy, Cearreta. Alejandro, Stephen Himson, Rachael Holmes, Colin Waters, Jan Zalasiewicz, Simon Turner, Mary McGann, Elizabeth Hadly, M. Stegner, Paul Pilkington, Jerome Kaiser, Juan Berrio, Ian Wilkinson, Jens Zinke, Kristine L. DeLong
Science and Products
Sediment Transport in Coastal Environments
Our research goals are to provide the scientific information, knowledge, and tools required to ensure that decisions about land and resource use, management practices, and future development in the coastal zone and adjacent watersheds can be evaluated with a complete understanding of the probable effects on coastal ecosystems and communities, and a full assessment of their vulnerability to natural...
Transport of invasive microorganisms
The objectives of his project are to investigate the vectors and timing of microbiological invasions and the subsequent dispersal of these non-native organisms due to sediment transport. We will attempt to confirm the identification of specific invasives encountered with molecular sequencing, monitor the spread of the invading populations through their recent distribution and the historic...
Coastal and Marine Geohazards of the U.S. West Coast and Alaska
Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Filter Total Items: 15
Radiochemistry (210Pb and 137Cs) of cores BC01 and BC02 obtained in 2024 off Alameda and Point Isabel in San Francisco Bay, California Radiochemistry (210Pb and 137Cs) of cores BC01 and BC02 obtained in 2024 off Alameda and Point Isabel in San Francisco Bay, California
This data release provides radiochemistry data (210Pb and 137Cs) of two sediment cores, BC01 and BC02, collected during USGS Field Activity 2024-662-FA in 2024 in San Francisco Bay, California, U.S.A., off Alameda and Point Isabel, respectively.
Census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio obtained in 1983-2010 in San Francisco Bay, California Census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio obtained in 1983-2010 in San Francisco Bay, California
This data release provides census counts of the non-indigenous benthic foraminifera Trochammina hadai Uchio in surface sediment samples obtained in San San Francisco Bay, California from 1983-2010.
Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone
Results of radiocarbon age dating of planktic foraminifera, benthic foraminifera, and pelecypod shell fragments collected from piston cores, trigger weight cores, and IKU grab samples obtained in 2015 and 2017 offshore British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone.
Sediment core data from offshore southern Cascadia during field activity 2019-643-FA Sediment core data from offshore southern Cascadia during field activity 2019-643-FA
This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data. Sediment cores were collected offshore northern California during U.S. Geological Survey cruise 2019-643-FA aboard the M/V Bold-Horizon. The cores were collected along with geophysical data to evaluate potential hazards (e.g., active fault systems, slope
Radiocarbon age dating of biological material from cores collected off central California in 1999, 2006, and 2019 Radiocarbon age dating of biological material from cores collected off central California in 1999, 2006, and 2019
Results of radiocarbon age dating of planktic and benthic foraminifera collected from cores obtained in 1999, 2006, and 2019 offshore central California in the vicinity of Morro Bay.
Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay
The urbanized area of downtown Menlo Park is subject to persistent flooding and sediment deposition by San Francisquito Creek in South San Francisco Bay. To mitigate these events, a suite of cores was collected in 2002 at the mouth of the creek to determine sediment depositional rates on the delta. One of those cores (721-1) was selected for microbiological (pollen, diatoms, and...
Digital maps of submarine landslides and mass wasting features offshore of southern California Digital maps of submarine landslides and mass wasting features offshore of southern California
This data release provides the locations and certain key metrics of landslide features offshore southern California, including landslide perimeters, scarps, evacuation zones, debris aprons, and slide-prone areas in geographic information system (GIS) shapefile format. The offshore region of southern California is a tectonically active area that includes more than 20 fault-bounded basins...
Grain-size data from core S3-15G, Monterey Fan, Central California Grain-size data from core S3-15G, Monterey Fan, Central California
This data release supersedes version 1.0, published in October 2021 at https://doi.org/10.5066/F74F1NW7. Versioning details are documented in the accompanying VersionHistory_P9DZ321R.txt file. This data release presents sediment grain-size data from samples collected from core S3-15G, a 4.72-m long gravity core collected at a depth of 3,491 meters on the western levy of the Monterey Fan...
Census counts of benthic foraminifera, environmental parameters (temperature, salinity, and oxygen concentration), and radiocarbon measurements from cores obtained under and near a whale-fall off western Vancouver Island, British Columbia, Canada Census counts of benthic foraminifera, environmental parameters (temperature, salinity, and oxygen concentration), and radiocarbon measurements from cores obtained under and near a whale-fall off western Vancouver Island, British Columbia, Canada
This data release provides census counts of benthic foraminifera (in percent for the total fauna and as raw counts for just the living specimens) as well as environmental parameters (temperature, salinity, and oxygen concentration) at the sampling sites, and radiocarbon measurements from selected push core samples obtained under and near a whale-fall off western Vancouver Island, British...
Grain-size data from core S3-15G, Monterey Fan, Central California Grain-size data from core S3-15G, Monterey Fan, Central California
This data release presents sediment grain-size data from samples collected from core S3-15G, a 4.72-m long gravity core collected at a depth of 3,491 meters on the western levy of the Monterey Fan on May 31, 1978 (USGS Field Activity S-3-78-SC).
Geophysical properties, geochronologic, and geochemical data of sediment cores collected from San Pablo Bay, California, October 17-20, 2016 Geophysical properties, geochronologic, and geochemical data of sediment cores collected from San Pablo Bay, California, October 17-20, 2016
Geophysical properties (P-wave velocity, gamma ray density, and magnetic susceptibility), geochronologic (radiocarbon, excess Lead-210, and Cesium-137), and geochemical data (organic carbon content and 60 element contents) are reported for select vibracores collected aboard the S/V Retriever October 17-20, 2016 in San Pablo Bay, California. Geophysical properties were measured with a...
Donated ROV vibracore and sampling data collected during Monterey Bay Aquarium Research Institute cruises in 2019 offshore of south-central California Donated ROV vibracore and sampling data collected during Monterey Bay Aquarium Research Institute cruises in 2019 offshore of south-central California
This dataset includes photographs of vibracores that were collected by the Monterey Bay Aquarium Research Institute (MBARI) in February 2019 and November 2019 aboard the R/V Western Flyer using the remotely operated vehicle (ROV) Doc Ricketts. The collection of these cores was funded entirely by MBARI, and the cores have been donated to the U.S. Geological Survey (USGS). The cores were...
Trochammina hadai Uchio
Figure 2 from the 2012 publication, "Arrival and Expansion of the Invasive Foraminifera Trochammina hadai Uchio in Padilla Bay, Washington," by McGann, et al. Trochammina hadai Uchio: A, dorsal view; B, edge view; C, ventral view.
Figure 2 from the 2012 publication, "Arrival and Expansion of the Invasive Foraminifera Trochammina hadai Uchio in Padilla Bay, Washington," by McGann, et al. Trochammina hadai Uchio: A, dorsal view; B, edge view; C, ventral view.
Filter Total Items: 75
Analysis of a human-mediated microbioinvasion: The global spread of the benthic foraminifer Trochammina hadai Uchio, 1962 Analysis of a human-mediated microbioinvasion: The global spread of the benthic foraminifer Trochammina hadai Uchio, 1962
A non-indigenous species (NIS) of benthic foraminifera was first identified in a core collected in 1993 in San Francisco Bay, California, USA, and subsequently identified as Trochammina hadai Uchio, 1962. Archived samples and literature reviews were used to determine that the species, which is native to Asia, arrived in San Francisco Bay between the early 1960s and 1983. Through...
Authors
Mary McGann, Maria Holzmann, Vincent Bouchet, Sibelle Disaró, Patricia Eichler, David Haig, Stephen Himson, Hiroshi Kitazato, Jean-Charles Pavard, Irina Polovodova Asteman, Andre Rodrigues, Clement Tremblin, Masashi Tsuchiya, Mark Williams, Phoebe O'Brien, Josefin Asplund, Malou Axelsson, Thomas Lorenson
Leisure boat harbours, hidden alien species, and pollution: A case study of Hinsholmskilen harbour (Gothenburg, Sweden) Leisure boat harbours, hidden alien species, and pollution: A case study of Hinsholmskilen harbour (Gothenburg, Sweden)
Small leisure boat harbours have important aesthetic and recreational values in any country with a coastline. In Sweden, there are about 860 000 leisure boats, which is one of the world's highest numbers in relation to the country's population. However, small boat harbours also present a wide range of environmental problems, including the introduction of alien species and high pollution...
Authors
Irina Polovodova Asteman, Emilie Jaffre, Agata Olejnik, Maria Holzmann, Mary McGann, Kjell Nordberg, Jean-Charles Pavard, Delia Rosel, Magali Schweizer
Palaeontological signatures of the Anthropocene are distinct from those of previous epochs Palaeontological signatures of the Anthropocene are distinct from those of previous epochs
The “Great Acceleration” beginning in the mid-20th century provides the causal mechanism of the Anthropocene, which has been proposed as a new epoch of geological time beginning in 1952 CE. Here we identify key parameters and their diagnostic palaeontological signals of the Anthropocene, including the rapid breakdown of discrete biogeographical ranges for marine and terrestrial species...
Authors
Mark Williams, Jan Zalasiewicz, Anthony Barnosky, Reinhold Leinfelder, Martin Head, Colin Waters, Francine McCarthy, Alejandro Cearreta, David Aldridge, Mary McGann, Bruce Hamilton, Colin Summerhayes, Jaia Syvitski, Jens Zinke, Andrew Cundy, Barbara Fialkiewicz-Koziel, J.R. McNeill, Michinobu Kuwae, Neil Rose, Simon Turner, Yoshiki Saito, Michael Wagreich, M. Stegner, Moriaki Yasuhara, Yongming Han, Amy Wrisdale, Rachael Holmes, Juan Berrio
Pockmarks offshore Big Sur, California provide evidence for recurrent, regional, and unconfined sediment gravity flows Pockmarks offshore Big Sur, California provide evidence for recurrent, regional, and unconfined sediment gravity flows
Recent surface ship multibeam surveys of the Sur Pockmark Field, offshore Central California, reveal >5,000 pockmarks in an area that is slated to host a wind farm, between 500- and 1,500-m water depth. Extensive fieldwork was conducted to characterize the seafloor environment and its recent geologic history, including visual observations with remotely operated vehicles, sediment core...
Authors
E. Lundsten, Charles Paull, R. Gwiazda, S. Dobbs, D.W. Caress, Linda Kuhnz, M. Walton, N. Nieminski, Mary McGann, Thomas Lorenson, Guy Cochrane, Jason Addison
A comprehensive assessment of submarine landslides and mass wasting processes offshore southern California A comprehensive assessment of submarine landslides and mass wasting processes offshore southern California
It is critical to characterize submarine landslide hazards near dense coastal populations, especially in areas with active faults, which can trigger slope failure, subsequent tsunamis, and damage seabed infrastructure during earthquake shaking. Offshore southern California, numerous marine geophysical surveys have been conducted over the past decade, and high-resolution bathymetric and...
Authors
M. Walton, James Conrad, Antoinette Papesh, Daniel S. Brothers, Jared W. Kluesner, Mary McGann, Peter Dartnell
First Occurrence of the nonindigenous Asian foraminifera Ammonia confertitesta in the Northeastern Pacific Ocean: Vancouver Island, British Columbia, Canada First Occurrence of the nonindigenous Asian foraminifera Ammonia confertitesta in the Northeastern Pacific Ocean: Vancouver Island, British Columbia, Canada
Observations in 2022 of intertidal and subtidal foraminiferal faunas at four localities along the central-eastern side of Vancouver Island, British Columbia, Canada, and molecular analyses have documented the first occurrence of the nonindigenous Asian species Ammonia confertitesta Zheng in the northwestern Pacific Ocean. The species was present at three of these localities: Davis Lagoon...
Authors
Mary McGann, Maria Holzmann
Where ice gave way to fire: Deglacial volcanic activity at the edge of the Coast Mountains in Milbanke Sound, BC Where ice gave way to fire: Deglacial volcanic activity at the edge of the Coast Mountains in Milbanke Sound, BC
Kitasu Hill and MacGregor Cone formed along the Principe Laredo Fault on British Columbia’s central coast as the Wisconsinan ice sheet withdrew from the Coast Mountains. These small-volume Milbanke Sound Volcanoes (MSV) provide remarkable evidence for the intimate relationship between volcanic and glacial facies. The lavas are within-plate, differentiated (low MgO
Authors
Tark Hamilton, Randolph J. Enkin, Zhen Li, Jan M. Bednarski, Cooper Stacey, Mary McGann, Britta Jensen
The invasive Asian benthic foraminifera Trochammina hadai Uchio, 1962: Identification of a new local in Normandy (France) and a discussion on its putative introduction pathways The invasive Asian benthic foraminifera Trochammina hadai Uchio, 1962: Identification of a new local in Normandy (France) and a discussion on its putative introduction pathways
The invasive benthic foraminifera Trochammina hadai has been found for the first time in Europe along the coast of Normandy. Its native range of distribution is in Asia (Japan and Korea), and it has also been introduced along the coasts of western North America, Brazil and Australia. Morphological and molecular assessments confirm that specimens found in Le Havre and Caen-Ouistreham...
Authors
Vincent Bouchet, Jean-Charles Pavard, Maria Holzmann, Mary McGann, Eric Armynot de Chatelet, Apolyne Courleux, Jean-Phillipe Pezy, Jean-Claude Dauvin, Laurent Seuront
Sediment gravity flow frequency offshore central California diminished significantly following the Last Glacial Maximum Sediment gravity flow frequency offshore central California diminished significantly following the Last Glacial Maximum
A high-resolution multibeam survey from a portion of the San Simeon Channel (offshore Morro Bay, California) captured a zone of recurring troughs and ridges adjacent to prominent submarine meander bends. Through an integrated study using surveying data, sediment core analysis, radiocarbon dating, and stable isotope measurements, we hypothesize that turbidity current event frequency was...
Authors
Stephen Dobbs, Charles Paull, Eve Lundsten, Roberto Gwiazda, David Caress, Mary McGann, Marianne Coholich, Maureen Walton, Nora Nieminski, Timothy McHargue, Steven Graham
The San Francisco Estuary, USA as a reference section for an Anthropocene series The San Francisco Estuary, USA as a reference section for an Anthropocene series
A San Francisco Estuary core was analysed at high resolution to assess its component stratigraphic signatures of the Anthropocene in the form of non-native species, Hg, spheroidal carbonaceous particles, δ13Corg, δ15N, radiogenic materials, and heavy metals. Time series analysis of the core using Ti data provides a chronology to depth 167 cm into the 1960s. Below this, to depth 230 cm...
Authors
Stephen Himson, Mark Williams, Jan Zalasiewicz, Colin Waters, Mary McGann, Richard England, Bruce Jaffe, Arnoud Boom, Rachael Holmes, Sue Sampson, Cerin Pye, Juan Berrio, Genevieve Tyrrell, Ian Wilkinson, Neil Rose, Pawel Gaca, Andrew Cundy
Affinity of the benthic foraminifer Cassidulinoides parkeriana (Brady) for whale-falls: Evidence from off western Vancouver Island, British Columbia, Canada Affinity of the benthic foraminifer Cassidulinoides parkeriana (Brady) for whale-falls: Evidence from off western Vancouver Island, British Columbia, Canada
A partial skeleton of a blue or fin whale, estimated to have been 16.5 m in length and thought to have been lying on the seafloor for less than 10 years, was observed at a depth of 1288 m off western Vancouver Island, British Columbia, Canada (48.68° N, 126.84° W). Four push cores were taken at the site, three (15-26 cm in length) directly under caudal vertebrae and one 18 cm long...
Authors
Mary McGann, Charles Paull
Planetary-scale change to the biosphere signalled by global species translocations can be used to identify the Anthropocene Planetary-scale change to the biosphere signalled by global species translocations can be used to identify the Anthropocene
We examine three distinctive biostratigraphic signatures associated with: hunting and gathering, landscape domestication, and globalisation. All three signatures have significant fossil records of regional importance that can be correlated inter-regionally and help describe the developing pattern of human expansion and appropriation of resources. While none have individual first or last
Authors
Mark Williams, Reinhold Leinfelder, Anthony Barnosky, Martin J Head, Francine McCarthy, Cearreta. Alejandro, Stephen Himson, Rachael Holmes, Colin Waters, Jan Zalasiewicz, Simon Turner, Mary McGann, Elizabeth Hadly, M. Stegner, Paul Pilkington, Jerome Kaiser, Juan Berrio, Ian Wilkinson, Jens Zinke, Kristine L. DeLong