Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Alleles (1)
- Allopatric speciation (1)
- Antarctica (1)
- Apalachicola (1)
- Behavior type (1)
-
- Climate change (1)
- Cryptic speciation (1)
- Deep sea (1)
- Deepwater Horizon (1)
- Dermo disease (1)
- Drought (1)
- Embryology (1)
- Estrogen (1)
- Estuary (1)
- Genes (1)
- Genetic sex determination (1)
- Geographic variation (1)
- Gulf of Mexico (1)
- Hydrocarbon degradation (1)
- Indian Ocean (1)
- Life Sciences, Biology, Marine Biology (1)
- Mediating indirect interactions (1)
- Natural Sciences (1)
- Natural selection (1)
- Natural variation (1)
- Nutrients (1)
- Oil spill (1)
- Oxygen (1)
- Oyster (1)
- Sea water (1)
Articles 1 - 12 of 12
Full-Text Articles in Life Sciences
The Impact Of Coastal Phytoplankton Blooms On Ocean-Atmosphere Thermal Energy Exchange: Evidence From A Two-Way Coupled Numerical Modeling System, Jason K. Jolliff, Travis A. Smith, Charlie N. Barron, Sergio Derada, Stephanie C. Anderson, Richard W. Gould, Robert A. Arnone
The Impact Of Coastal Phytoplankton Blooms On Ocean-Atmosphere Thermal Energy Exchange: Evidence From A Two-Way Coupled Numerical Modeling System, Jason K. Jolliff, Travis A. Smith, Charlie N. Barron, Sergio Derada, Stephanie C. Anderson, Richard W. Gould, Robert A. Arnone
Faculty Publications
A set of sensitivity experiments are performed with a two-way coupled and nested ocean-atmosphere forecasting system in order to deconvolve how dense phytoplankton stocks in a coastal embayment may impact thermal energy exchange processes. Monterey Bay simulations parameterizing solar shortwave transparency in the surface ocean as an invariant oligotrophic oceanic water type estimate consistently colder sea surface temperature (SST) than simulations utilizing more realistic, spatially varying shortwave attenuation terms based on satellite estimates of surface algal pigment concentration. These SST differences lead to an similar to 88% increase in the cumulative turbulent thermal energy transfer from the ocean to the …
Assimilating Altimetric Data Into A South China Sea Model, Chau-Ron Wu, Ping-Tung Shaw, Shenn-Yu Chao
Assimilating Altimetric Data Into A South China Sea Model, Chau-Ron Wu, Ping-Tung Shaw, Shenn-Yu Chao
Faculty Publications
Sea surface heights from the TOPEX/Poseidon altimeter are assimilated into a three-dimensional primitive equation model to derive the circulation in the South China Sea. With data assimilation the model resolves not only the basinwide circulation but also a dipole off Vietnam and a low/high feature near the Luzon Strait. Mesoscale features are missing in the simulation without data assimilation because of poor resolution in the wind field and inadequate knowledge of the transport through the Luzon Strait. Compared to the case without data assimilation, data assimilation reduces the root mean square error between the simulated and observed sea surface heights …
Modeling Photosynthesis Of Spartina Alterniflora (Smooth Cordgrass) Impacted By The Deepwater Horizon Oil Spill Using Bayesian Inference, Wei Wu, Patrick D. Biber, Mark S. Peterson, Chongfeng Gong
Modeling Photosynthesis Of Spartina Alterniflora (Smooth Cordgrass) Impacted By The Deepwater Horizon Oil Spill Using Bayesian Inference, Wei Wu, Patrick D. Biber, Mark S. Peterson, Chongfeng Gong
Faculty Publications
To study the impact of the Deepwater Horizon oil spill on photosynthesis of coastal salt marsh plants in Mississippi, we developed a hierarchical Bayesian (HB) model based on field measurements collected from July 2010 to November 2011. We sampled three locations in Davis Bayou, Mississippi (30.375 degrees N, 88.790 degrees W) representative of a range of oil spill impacts. Measured photosynthesis was negative (respiration only) at the heavily oiled location in July 2010 only, and rates started to increase by August 2010. Photosynthesis at the medium oiling location was lower than at the control location in July 2010 and it …
Nutrient Depletion As A Proxy For Microbial Growth In Deepwater Horizon Subsurface Oil/Gas Plumes, Alan M. Shiller, Dongjoo Joung
Nutrient Depletion As A Proxy For Microbial Growth In Deepwater Horizon Subsurface Oil/Gas Plumes, Alan M. Shiller, Dongjoo Joung
Faculty Publications
The Deepwater Horizon accident resulted in a substantial uncontrolled hydrocarbon release to the northern Gulf of Mexico, much of which was entrained in deep submerged plumes. While bio-degradation of the hydrocarbons has been inferred from microbial biomass and genetics, the amount of conversion of oil and gas carbon to biomass remains uncertain having only been estimated in modeling studies. Here we examine correlated depletions of nitrate, phosphate and oxygen in the submerged plumes and conclude that a substantial portion of hydrocarbons in these plumes was converted to biomass (0.8-2 x 10(10) mol C). This contrasts with nutrient-limited surface waters where …
A New Us Polar Research Vessel For The Twenty-First Century, Robert B. Dunbar, Jon Alberts, Carin Ashjian, Vernon Asper, Dale Chayes, Eugene Domack, Hugh Ducklow, Bruce Huber, Lawrence Lawver, Daniel Oliver, Doug Russell, Craig R. Smith, Maria Vernet
A New Us Polar Research Vessel For The Twenty-First Century, Robert B. Dunbar, Jon Alberts, Carin Ashjian, Vernon Asper, Dale Chayes, Eugene Domack, Hugh Ducklow, Bruce Huber, Lawrence Lawver, Daniel Oliver, Doug Russell, Craig R. Smith, Maria Vernet
Faculty Publications
Scientific and political interests at the poles are significant and rapidly increasing, driven in part by the effects of climate change and emerging geopolitical realities. The polar regions provide important services to global ecosystems and humankind, ranging from food and energy to freshwater and biodiversity. Yet the poles are experiencing changes at rates that far outpace the rest of the planet. Coastal Arctic communities are impacted by climate change through coastal erosion, sea level rise, ice loss, and altered marine food webs, threatening the future of their subsistence lifestyle. Climate change has dramatically increased the melt rate of ice sheets …
The Role Of Individual Behavior Type In Mediating Indirect Interactions, Blaine D. Griffen, Benjamin J. Toscano, John Gatto
The Role Of Individual Behavior Type In Mediating Indirect Interactions, Blaine D. Griffen, Benjamin J. Toscano, John Gatto
Faculty Publications
Trait-mediated indirect interactions (TMII) play an important role in structuring natural communities, and numerous studies have experimentally demonstrated their presence in a variety of systems. However, these studies have largely examined the presence or absence of traits that are responsible for these interactions, without considering natural variation between individuals in the extent to which these traits are manifested. We used a well-documented TMII to investigate the importance of individual behavior type for determining the strength of the TMII. The toadfish Opsanus tau has an indirect positive influence on bivalve survival because the mud crab Panopeus herbstii, a consumer of bivalves, …
Evolution Of A Sexually Dimorphic Trait In A Broadly Distributed Topminnow (Fundulus Olivaceus), Jacob F. Schaefer, David D. Duvernell, Brian R. Kreiser, Charles Champagne, Scott R. Clark, Melissa Gutierrez, Laura K. Stewart, Chazz Coleman
Evolution Of A Sexually Dimorphic Trait In A Broadly Distributed Topminnow (Fundulus Olivaceus), Jacob F. Schaefer, David D. Duvernell, Brian R. Kreiser, Charles Champagne, Scott R. Clark, Melissa Gutierrez, Laura K. Stewart, Chazz Coleman
Faculty Publications
Understanding the interaction between sexual and natural selection within variable environments is crucial to our understanding of evolutionary processes. The handicap principle predicts females will prefer males with exaggerated traits provided those traits are indicators of male quality to ensure direct or indirect female benefits. Spatial variability in ecological factors is expected to alter the balance between sexual and natural selection that defines the evolution of such traits. Male and female blackspotted topminnows (Fundulidae: Fundulus olivaceus) display prominent black dorsolateral spots that are variable in number across its broad range. We investigated variability in spot phenotypes at 117 sites …
Impacts Of Upstream Drought And Water Withdrawals On The Health And Survival Of Downstream Estuarine Oyster Populations, Laura E. Petes, Alicia J. Brown, Carley R. Knight
Impacts Of Upstream Drought And Water Withdrawals On The Health And Survival Of Downstream Estuarine Oyster Populations, Laura E. Petes, Alicia J. Brown, Carley R. Knight
Faculty Publications
Increases in the frequency, duration, and severity of regional drought pose major threats to the health and integrity of downstream ecosystems. During 2007-2008, the U.S. southeast experienced one of the most severe droughts on record. Drought and water withdrawals in the upstream watershed led to decreased freshwater input to Apalachicola Bay, Florida, an estuary that is home to a diversity of commercially and ecologically important organisms. This study applied a combination of laboratory experiments and field observations to investigate the effects of reduced freshwater input on Apalachicola oysters. Oysters suffered significant disease-related mortality under high-salinity, drought conditions, particularly during the …
Were Multiple Stressors A "Perfect Storm" For Northern Gulf Of Mexico Bottlenose Dolphins (Tursiops Truncatus) In 2011?, Ruth H. Carmichael, William M. Graham, Allen Aven, Graham Worthy, Stephan D. Howden
Were Multiple Stressors A "Perfect Storm" For Northern Gulf Of Mexico Bottlenose Dolphins (Tursiops Truncatus) In 2011?, Ruth H. Carmichael, William M. Graham, Allen Aven, Graham Worthy, Stephan D. Howden
Faculty Publications
An unusual number of near term and neonatal bottlenose dolphin (Tursiops truncatus) mortalities occurred in the northern Gulf of Mexico (nGOM) in 2011, during the first calving season after two well documented environmental perturbations; sustained cold weather in 2010 and the Deepwater Horizon oil spill (DWHOS). Preceding the stranding event, large volumes of cold freshwater entered the nGOM due to unusually large snowmelt on the adjacent watershed, providing a third potential stressor. We consider the possibility that this extreme cold and freshwater event contributed to the pattern of perinatal dolphin strandings along the nGOM coast. During the 4-month period starting …
Diversity Of Tanaidacea (Crustacea: Peracarida) In The World's Oceans - How Far Have We Come?, Gary Anderson, Magdalena Blazewicz-Paszkowycz, Roger Bamber
Diversity Of Tanaidacea (Crustacea: Peracarida) In The World's Oceans - How Far Have We Come?, Gary Anderson, Magdalena Blazewicz-Paszkowycz, Roger Bamber
Faculty Publications
Tanaidaceans are small peracarid crustaceans which occur in all marine habitats, over the full range of depths, and rarely into fresh waters. Yet they have no obligate dispersive phase in their life-cycle. Populations are thus inevitably isolated, and allopatric speciation and high regional diversity are inevitable; cosmopolitan distributions are considered to be unlikely or non-existent. Options for passive dispersion are discussed. Tanaidaceans appear to have first evolved in shallow waters, the region of greatest diversification of the Apseudomorpha and some tanaidomorph families, while in deeper waters the apseudomorphs have subsequently evolved two or three distinct phyletic lines. The Neotanaidomorpha has …
An Unbiased Approach To Identify Genes Involved In Development In A Turtle With Temperature-Dependent Sex Determination, Jena L. Chojnowski, Edward L. Braun
An Unbiased Approach To Identify Genes Involved In Development In A Turtle With Temperature-Dependent Sex Determination, Jena L. Chojnowski, Edward L. Braun
Faculty Publications
Many reptiles exhibit temperature-dependent sex determination (TSD). The initial cue in TSD is incubation temperature, unlike genotypic sex determination (GSD) where it is determined by the presence of specific alleles (or genetic loci). We used patterns of gene expression to identify candidates for genes with a role in TSD and other developmental processes without making a priori assumptions about the identity of these genes (ortholog-based approach). We identified genes with sexually dimorphic mRNA accumulation during the temperature sensitive period of development in the Red-eared slider turtle (Trachemys scripta), a turtle with TSD. Genes with differential mRNA accumulation in response to …
Discrimination Of Juvenile Red Snapper Otolith Chemical Signatures From Gulf Of Mexico Nursery Regions, Michelle Zapp Sluis, Beverly K. Barnett, William F. Patterson Iii, Alan M. Shiller
Discrimination Of Juvenile Red Snapper Otolith Chemical Signatures From Gulf Of Mexico Nursery Regions, Michelle Zapp Sluis, Beverly K. Barnett, William F. Patterson Iii, Alan M. Shiller
Faculty Publications
Age-0 red snapper Lutjanus campechanus from the 2005-2007 year-classes were sampled in six regions across the Gulf of Mexico (Gulf) to develop nursery signatures from otolith element : Ca ratios (Ba:Ca, Mg:Ca, Mn:Ca, Sr:Ca, and Li:Ca) and stable isotope delta values (delta C-13 and delta O-18). Element : Ca ratios were analyzed with sector field inductively coupled plasma mass spectrometry on dissolved right sagittae; isotope ratio mass spectrometry was employed to analyze pulverized left otoliths for delta C-13 and delta O-18. Otolith chemical signatures were significantly different among regions in each year. Year-class-specific quadratic discriminant function analysis (QDFA) distinguished nursery …