Index Catalog // ScholarsArchive@OSU

Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini

Creator:: Dayton, Paul K., Kim, Stacy, Jarrell, Shannon C., Oliver, John S., Hammerstrom, Kamille, Fisher, Jennifer L., O'Connor, Kevin, Barber, Julie S., Robilliard, Gordon, Barry, James, Thurber, Andrew R., and Conlan, Kathy
Abstract:: Polar ecosystems are sensitive to climate forcing, and we often lack baselines to evaluate changes. Here we report a nearly 50-year study in which a sudden shift in the population dynamics of an ecologically important, structure-forming hexactinellid sponge, Anoxycalyx joubini was observed. This is the largest Antarctic sponge, with individuals...
Resource Type:: Article
Full Text:: area around McMurdo Station is normally influenced by southerly currents bringing phytoplank- ton

Comparative Composition, Diversity and Trophic Ecology of Sediment Macrofauna at Vents, Seeps and Organic Falls

Creator:: Bernardino, Angelo F., Levin, Lisa A., Thurber, Andrew R., and Smith, Craig R.
Abstract:: Sediments associated with hydrothermal venting, methane seepage and large organic falls such as whale, wood and plant detritus create deep-sea networks of soft-sediment habitats fueled, at least in part, by the oxidation of reduced chemicals. Biological studies at deep-sea vents, seeps and organic falls have looked at macrofaunal taxa, but...
Resource Type:: Article
Full Text:: than an off-seep reference station. Seep infauna includes a subset of background taxa apparently

Avian Species Richness in Relation to Intensive Forest Management Practices in Early Seral Tree Plantations

Creator:: Jones, Jay E., Kroll, Andrew J., Giovanini, Jack, Duke, Steven D., Ellis, Tana M., and Betts, Matthew G.
Abstract:: •Background: Managers of landscapes dedicated to forest commodity production require information about how practices influence biological diversity. Individual species and communities may be threatened if management practices truncate or simplify forest age classes that are essential for reproduction and survival. For instance, the degradation and loss of complex diverse forest...
Resource Type:: Article
Full Text:: with herbicides. The avian community was sampled using a single fixed-radius point count station in

Risk of Exposure to Eastern Equine Encephalomyelitis Virus Increases with the Density of Northern Cardinals

Creator:: Estep, Laura K., McClure, Christopher J. W., Vander Kelen, Patrick, Burkett-Cadena, Nathan D., Sickerman, Stephen, Hernandez, José, Jinright, Joseph, Hunt, Brenda, Lusk, John, Hoover, Victor, Armstrong, Keith, Stark, Lillian M., Hill, Geoffrey E., and Unnasch, Thomas R.
Abstract:: For a variety of infectious diseases, the richness of the community of potential host species has emerged as an important factor in pathogen transmission, whereby a higher richness of host species is associated with a lowered disease risk. The proposed mechanism driving this pattern is an increased likelihood in species-rich...
Resource Type:: Article
Full Text:: amplification. Am J Trop Med Hyg 80: 268–278. 16. Villari P, Spielman A, Komar N, McDowell M, Timperi RJ (1995

Post-Breeding Season Migrations of a Top Predator, the Harbor Seal (Phoca vitulina richardii), from a Marine Protected Area in Alaska

Creator:: Womble, Jamie N. and Gende, Scott M.
Abstract:: Marine protected areas (MPAs) are increasingly being used as a conservation tool for highly mobile marine vertebrates and the focus is typically on protecting breeding areas where individuals are aggregated seasonally. Yet movements during the non-breeding season can overlap with threats that may be equally as important to population dynamics....
Resource Type:: Article
Full Text:: Station, National Park Service, Juneau, Alaska, United States of America Abstract Marine protected areas

Cold Seep Epifaunal Communities on the Hikurangi Margin, New Zealand: Composition, Succession, and Vulnerability to Human Activities

Creator:: Bowden, David A., Rowden, Ashley A., Thurber, Andrew R., Baco, Amy R., Levin, Lisa A., and Smith, Craig R.
Abstract:: Cold seep communities with distinctive chemoautotrophic fauna occur where hydrocarbon-rich fluids escape from the seabed. We describe community composition, population densities, spatial extent, and within-region variability of epifaunal communities at methane-rich cold seep sites on the Hikurangi Margin, New Zealand. Using data from towed camera transects, we match observations to...
Resource Type:: Article
Full Text:: species at all sites (Elena Krylova personal communication) but two valves recovered from LM-9 (station

Limitations of Species Delimitation Based on Phylogenetic Analyses: A Case Study in the Hypogymnia hypotrypa Group (Parmeliaceae, Ascomycota)

Creator:: Wei, Xinli, McCune, Bruce, Lumbsch, H. Thorsten, Li, Hui, Leavitt, Steven, Yamamoto, Yoshikazu, Tchabanenko, Svetlana, and Wei, Jiangchun
Abstract:: Delimiting species boundaries among closely related lineages often requires a range of independent data sets and analytical approaches. Similar to other organismal groups, robust species circumscriptions in fungi are increasingly investigated within an empirical framework. Here we attempt to delimit species boundaries in a closely related Glade of lichen-forming fungi...
Resource Type:: Article
Full Text:: the analysis of over 500 278 specimens in our study and in agreement with previous results [33], H

Circadian Regulation of Glutathione Levels and Biosynthesis in Drosophila melanogaster

Creator:: Beaver, Laura M., Klichko, Vladimir I., Chow, Eileen S., Kotwica-Rolinska, Joanna, Williamson, Marisa, Orr, William C., Radyuk, Svetlana N., and Giebultowicz, Jadwiga M.
Abstract:: Circadian clocks generate daily rhythms in neuronal, physiological, and metabolic functions. Previous studies in mammals reported daily fluctuations in levels of the major endogenous antioxidant, glutathione (GSH), but the molecular mechanisms that govern such fluctuations remained unknown. To address this question, we used the model species Drosophila, which has a...
Resource Type:: Article
Full Text:: (Bulletin 1770 US/EG Rev A, Bio-Rad). The supernatant was divided into two aliquots. The first aliquot was

Does Temperature-Mediated Reproductive Success Drive the Direction of Species Displacement in Two Invasive Species of Leafminer Fly?

Creator:: Wang, Haihong, Reitz, Stuart R., Xiang, Juncheng, Smagghe, Guy, and Lei, Zhongren
Abstract:: Liriomyza sativae and L. trifolii (Diptera: Agromyzidae) are two highly invasive species of leafmining flies, which have become established as pests of horticultural crops throughout the world. In certain regions where both species have been introduced, L. sativae has displaced L. trifolii, whereas the opposite has occurred in other regions....
Resource Type:: Article
Full Text:: plants at the Sanya Experiment Station under controlled conditions (2561uC, 70610% relative humidity [RH

Multivariate Models of Adult Pacific Salmon Returns

Creator:: Burke, Brian J., Peterson, William T., Beckman, Brian R., Morgan, Cheryl, Daly, Elizabeth A., and Litz, Marisa
Abstract:: Most modeling and statistical approaches encourage simplicity, yet ecological processes are often complex, as they are influenced by numerous dynamic environmental and biological factors. Pacific salmon abundance has been highly variable over the last few decades and most forecasting models have proven inadequate, primarily because of a lack of understanding...
Resource Type:: Article
Full Text:: observed at the mid shelf (station NH05, Figure 1) UpwellingAnomaly A measure of upwelling anomalies for

ScholarsArchive@OSU

Recruitment, Growth and Mortality of an Antarctic Hexactinellid Sponge, Anoxycalyx joubini

Comparative Composition, Diversity and Trophic Ecology of Sediment Macrofauna at Vents, Seeps and Organic Falls

Avian Species Richness in Relation to Intensive Forest Management Practices in Early Seral Tree Plantations

Risk of Exposure to Eastern Equine Encephalomyelitis Virus Increases with the Density of Northern Cardinals

Post-Breeding Season Migrations of a Top Predator, the Harbor Seal (Phoca vitulina richardii), from a Marine Protected Area in Alaska

Cold Seep Epifaunal Communities on the Hikurangi Margin, New Zealand: Composition, Succession, and Vulnerability to Human Activities

Limitations of Species Delimitation Based on Phylogenetic Analyses: A Case Study in the Hypogymnia hypotrypa Group (Parmeliaceae, Ascomycota)

Circadian Regulation of Glutathione Levels and Biosynthesis in Drosophila melanogaster

Does Temperature-Mediated Reproductive Success Drive the Direction of Species Displacement in Two Invasive Species of Leafminer Fly?

Multivariate Models of Adult Pacific Salmon Returns

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