Index Catalog // ScholarsArchive@OSU

Creator:: Fietz, Susanne, Prahl, Fredrick G., Moraleda, Núria, and Rosell-Melé, Antoni
Abstract:: Branched glycerol dialkyl glycerol tetraethers (brGDGTs) of purportedly terrestrial origin are frequently detected in marine sediments, even in remote ocean sites where no direct impact from land erosion via rivers takes place. At these places, the most likely explanation for the presence of brGDGTs is in situ production or eolian...
Resource Type:: Article

Creator:: Rosell-Melé, Antoni and Prahl, Fredrick G.
Abstract:: The seasonality of sea surface temperatures (SST) estimated from the alkenone-U[superscript K’]₃₇ index has been a debated issue since the development of the sediment trap time series data from 34 sampling locations, we show that the maximum alkenone flux in sediment traps varies markedly across the oceans, only on latitude...
Resource Type:: Article

Creator:: Gregg, Tiffany, Prahl, Fredrick G., and Simoneit, Bernd R. T.
Abstract:: Analysis of suspended particulate material (SPM) collected from the Columbia River and its estuary in 2007–2008 revealed the ubiquitous presence of polycyclic aromatic hydrocarbons (PAHs) from several distinct sources. The two dominant ones were: (1) a suite of non-alkylated, three to five-ringed compounds derived from high temperature combustion and (2)...
Resource Type:: Article

Creator:: Woodgate, Rebecca A., Stafford, Kathleen M., and Prahl, Fredrick G.
Abstract:: The flow through the Bering Strait, the only Pacific-Arctic oceanic gateway, has dramatic local, regional, and global impacts. Advanced year-round moored technology quantifies challengingly large temporal (subdaily, seasonal, and interannual) and spatial variability in the ~85 km wide, two-channel strait. The typically northward flow, intensified seasonally in the ~10–20 km...
Resource Type:: Article

Creator:: Puigcorbé, Viena, Benitez-Nelson, Claudia R., Masqué, Pere, and Prahl, Fredrick G.
Abstract:: Summertime carbon, nitrogen, and biogenic silica export was examined using ²³⁴Th:²³⁸U disequilibria combined with free floating sediment traps and fine scale water column sampling with in situ pumps (ISP) within the Eastern Tropical North Pacific and the Gulf of California. Fine scale ISP sampling provides evidence that in this system,...
Resource Type:: Article

Creator:: White, Angelicque E., Foster, Rachel A., Benitez-Nelson, Claudia R., Masqué, Pere, Verdeny, Elisabet, Popp, Brian N., Arthur, Karen E., and Prahl, Fredrick G.
Abstract:: Di-nitrogen (N₂) fixation plays a well-recognized role in the enhancement of primary production and arguably particle export in oligotrophic regions of the subtropical and tropical oceans. However, recent evidence suggests that N₂ fixation may also be significant in regions of the surface ocean proximate to or overlying zones of intense...
Resource Type:: Article

Creator:: Feng, Xiaojuan, Benitez-Nelson, Bryan C., Montlucon, Daniel B., Prahl, Fredrick G., McNichol, Ann P., Xu, Li, Repeta, Daniel J., and Eglinton, Timothy I.
Abstract:: Plant wax lipids and lignin phenols are the two most common classes of molecular markers that are used to trace vascular plant-derived OM in the marine environment. However, their ¹³C and ¹⁴C compositions have not been directly compared, which can be used to constrain the flux and attenuation of terrestrial...
Resource Type:: Article

Creator:: Fietz, Susanne, Huguet, Carme, Bendle, James, Escala, Marina, Gallacher, Christopher, Herfort, Lydie, Jamieson, Robert, Martinez-Garcia, Alfredo, McClymont, Erin L., Peck, Vicky L., Prahl, Fredrick G., Rossi, Sergio, Rueda, Gemma, Sanson-Barrera, Anna, and Rosell-Mele, Antoni
Abstract:: Two major types of glycerol dialkyl glycerol tetraethers (GDGTs) are commonly used in paleoecological and paleoclimatological reconstructions: isoprenoidal and branched GDGTs. In aquatic environments, it was originally assumed that isoprenoidal GDGTs, especially crenarchaeol, derive mainly from aquatic Thaumarchaeota, whilst branched GDGTs are an allochthonous input derived from soil Bacteria. Recently,...
Resource Type:: Article

Creator:: Herfort, Lydie, Peterson, Tawnya D., Prahl, Fredrick G., McCue, Lee Ann, Needoba, Joseph A., Crump, Byron C., Roegner, G. Curtis, Campbell, Victoria, and Zuber, Peter
Abstract:: The localized impact of blooms of the mixotrophic ciliate Myrionecta rubra in the Columbia River estuary during 2007-2010 was evaluated with biogeochemical, light microscopy, physiological, and molecular data. M. rubra affected surrounding estuarine nutrient cycles, as indicated by high and low concentrations of organic nutrients and inorganic nitrogen, respectively, associated...
Resource Type:: Article

Creator:: Herfort, Lydie, Peterson, Tawnya D., McCue, Lee Ann, Crump, Byron C., Prahl, Fredrick G., Baptista, Antonio M., Campbell, Victoria, Warnick, Rachel, Selby, Mikaela, Roegner, G. Curtis, and Zuber, Peter
Abstract:: For several decades, annually recurring blooms of the photosynthetic ciliate Myrionecta rubra have been observed in the Columbia River estuary in late summer. In an effort to understand the dynamics of these blooms, we investigated the genetic variability of M. rubra and its cryptophyte plastids within 3 large estuarine blooms...
Resource Type:: Article

ScholarsArchive@OSU