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Full-Text Articles in Life Sciences
The Growth Response Of Two Diatom Species To Atmospheric Dust From The Last Glacial Maximum, Tim M. Conway, Linn J. Hoffmann, Eike Breitbarth, Robert F. Strzepek, Eric W. Wolff
The Growth Response Of Two Diatom Species To Atmospheric Dust From The Last Glacial Maximum, Tim M. Conway, Linn J. Hoffmann, Eike Breitbarth, Robert F. Strzepek, Eric W. Wolff
Marine Science Faculty Publications
Relief of iron (Fe) limitation in the surface Southern Ocean has been suggested as one driver of the regular glacial-interglacial cycles in atmospheric carbon dioxide (CO2). The proposed cause is enhanced deposition of Fe-bearing atmospheric dust to the oceans during glacial intervals, with consequent effects on export production and the carbon cycle. However, understanding the role of enhanced atmospheric Fe supply in biogeochemical cycles is limited by knowledge of the fluxes and 'bioavailability' of atmospheric Fe during glacial intervals. Here, we assess the effect of Fe fertilization by dust, dry-extracted from the Last Glacial Maximum portion of the EPICA Dome …
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Marine Science Faculty Publications
The Deepwater Horizon (DWH) spill released 4.9 million barrels of oil into the Gulf of Mexico (GoM) over 87 days. Sediment and water sampling efforts were concentrated SW of the DWH and in coastal areas. Here we present geochemistry data from sediment cores collected in the aftermath of the DWH event from 1000-1500 m water depth in the DeSoto Canyon, NE of the DWH wellhead. Cores were analyzed at high-resolution (at 2 mm and 5 mm intervals) in order to evaluate the concentration, composition and input of hydrocarbons to the seafloor. Specifically, we analyzed total organic carbon (TOC), aliphatic, polycyclic …
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
Marine Science Faculty Publications
Sediment cores were collected from three sites (1000-1200 m water depth) in the northeastern Gulf of Mexico from December 2010 to June 2011 to assess changes in benthic foraminiferal density related to the Deepwater Horizon (DWH) event (April-July 2010, 1500 m water depth). Short-lived radioisotope geochronologies (²¹⁰Pb, ²³⁴Th), organic geochemical assessments, and redox metal concentrations were determined to relate changes in sediment accumulation rate, contamination, and redox conditions with benthic foraminiferal density. Cores collected in December 2010 indicated a decline in density (80-93%). This decline was characterized by a decrease in benthic foraminiferal density and benthic foraminiferal accumulation rate (BFAR) …