Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Ecology and Evolutionary Biology (4)
- Animal Sciences (3)
- Biology (3)
- Environmental Sciences (3)
- Physical Sciences and Mathematics (3)
-
- Terrestrial and Aquatic Ecology (3)
- Fresh Water Studies (2)
- Natural Resources and Conservation (2)
- Oceanography and Atmospheric Sciences and Meteorology (2)
- Ornithology (2)
- Aquaculture and Fisheries (1)
- Biochemistry, Biophysics, and Structural Biology (1)
- Biodiversity (1)
- Laboratory and Basic Science Research (1)
- Other Ecology and Evolutionary Biology (1)
- Plant Sciences (1)
- Institution
- Publication
- Publication Type
- File Type
Articles 1 - 15 of 15
Full-Text Articles in Marine Biology
Sedimentary Age Models, Benthic Foraminifera, Mass Accumulation Rates, And Volcanic Grain Data From R/V Justo Sierra Cruise In The Southern Gulf And Ixtoc I From 2015-08-03 To 2015-08-06, Patrick Schwing
C-IMAGE data
This dataset includes age models, benthic foraminifera species counts used for stable isotope analysis, mass accumulation rates and volcanic grain counts from 6 sediment cores collected throughout the southern Gulf of Mexico during the R/V Justo Sierra cruise in the Southern Gulf and Ixtoc I from 2015-08-03 to 2015-08-06. Samples were analyzed by gamma spectrometry with High-Purity Germanium (HPGe) gamma-ray detectors (Canberra Coaxial Planar configuration) for total 210Pb (46.5 keV), 214Pb (295 keV and 351 keV), and 214Bi (609 keV) activities. The mean activity of the 214Pb (295 keV), 214Pb (351 keV), and 214Bi (609 keV) was used as a …
A Multidecade Experiment Shows That Fertilization By Salmon Carcasses Enhanced Tree Growth In The Riparian Zone, Thomas P. Quinn, Helfield M. James, Catherine S. Austin, Rachel A. Hovel, Andrew Godard Bunn
A Multidecade Experiment Shows That Fertilization By Salmon Carcasses Enhanced Tree Growth In The Riparian Zone, Thomas P. Quinn, Helfield M. James, Catherine S. Austin, Rachel A. Hovel, Andrew Godard Bunn
Environmental Sciences Faculty and Staff Publications
As they return to spawn and die in their natal streams, anadromous, semelparous fishes such as Pacific salmon import marine‐derived nutrients to otherwise nutrient‐poor freshwater and riparian ecosystems. Diverse organisms exploit this resource, and previous studies have indicated that riparian tree growth may be enhanced by such marine‐derived nutrients. However, these studies were largely inferential and did not account for all factors affecting tree growth. As an experimental test of the contribution of carcasses to tree growth, for 20 yr, we systematically deposited all sockeye salmon (Oncorhynchus nerka) carcasses (217,055 individual salmon) in the riparian zone on one …
Gulf-Wide Seafloor Surface Benthic Foraminifera Stable Isotopes From Sediment Cores Collected On Multiple Cruises From 2010-06-13 To 2017-07-19, Patrick Schwing, David J. Hollander
Gulf-Wide Seafloor Surface Benthic Foraminifera Stable Isotopes From Sediment Cores Collected On Multiple Cruises From 2010-06-13 To 2017-07-19, Patrick Schwing, David J. Hollander
C-IMAGE data
This dataset includes baseline stable carbon and oxygen isotope measurements from benthic foraminifera throughout the Gulf of Mexico. Stable isotope measurements were performed on Cibicidoides spp. The dataset contains the sediment core information such as location, date, and depth; and benthic foraminiferal stable carbon and oxygen isotopes. Sediment cores were collected on multiple cruises from 2010-06-13 to 2017-07-19.
Integrating Complementary Methods To Improve Diet Analysis In Fishery-Targeted Species, Jordan K. Matley, Gregory E. Maes, Floriaan Devloo-Delva, Roger Huerlimann, Gladys Chua, Andrew J. Tobin, Aaron T. Fisk, Colin A. Simpfendorfer, Michelle R. Heupel
Integrating Complementary Methods To Improve Diet Analysis In Fishery-Targeted Species, Jordan K. Matley, Gregory E. Maes, Floriaan Devloo-Delva, Roger Huerlimann, Gladys Chua, Andrew J. Tobin, Aaron T. Fisk, Colin A. Simpfendorfer, Michelle R. Heupel
Great Lakes Institute for Environmental Research Publications
Developing efficient, reliable, cost-effective ways to identify diet is required to understand trophic ecology in complex ecosystems and improve food web models. A combination of techniques, each varying in their ability to provide robust, spatially and temporally explicit information can be applied to clarify diet data for ecological research. This study applied an integrative analysis of a fishery-targeted species group—Plectropomus spp. in the central Great Barrier Reef, Australia, by comparing three diet-identification approaches. Visual stomach content analysis provided poor identification with ~14% of stomachs sampled resulting in identification to family or lower. A molecular approach was successful with prey from …
Parasitic Indicators Of Foraging Strategies In Wading Birds, Sarah Gumbleton
Parasitic Indicators Of Foraging Strategies In Wading Birds, Sarah Gumbleton
HCNSO Student Theses and Dissertations
Feeding ecology and trophic interactions of six species of wading birds were explored through a combined analysis of stable isotope profiles and endoparasite communities. Stable isotopes broadly characterize the feeding preferences and geographic information, while parasite communities reflect long-term trends in feeding ecology. Deceased birds were obtained from four South Florida wildlife rehabilitation organizations. Of the 81 birds dissected, 73 contained parasites. Parasites were predominately found within the gastrointestinal tract. Host and range extensions were noted for several parasite taxa. Bird host species had a significant effect on the parasite community (P=0.001) while wildlife center location and maturity status did …
Spatial And Temporal Patterns Of Arctic Nearshore Fish Community And Food Web Structures, Mark B. Barton
Spatial And Temporal Patterns Of Arctic Nearshore Fish Community And Food Web Structures, Mark B. Barton
FIU Electronic Theses and Dissertations
Climate change and increasing anthropogenic activities are causing rapid changes to environmental and ecological processes in the Arctic Ocean. To better understand these changes, scientists have increased research efforts in these regions, but to date the number of studies on Arctic nearshore habitats are lacking. My dissertation responds to the paucity of information and investigates patterns in Arctic nearshore fish communities and food webs to gain insight to how these ecosystems may shift as these changes continue. I used multivariate statistical analysis to examine patterns in community structure and composition to determine that Arctic nearshore fish communities are largely driven …
Wageningen Aquaria/Microcosm Experiments, Benthic Foraminifera Assemblage And Stable Isotope Measurements, Patrick Schwing, David J. Hollander
Wageningen Aquaria/Microcosm Experiments, Benthic Foraminifera Assemblage And Stable Isotope Measurements, Patrick Schwing, David J. Hollander
C-IMAGE data
Dataset contains benthic foraminifera assemblage and stable isotope measurements. Stable isotope measurements are presented in δ13C and δ18O (‰). Diversity indices include Shannon, Fisher’s Alpha and evenness. Benthic foraminifera abundance is reported as individuals per unit mass (indiv./g).
Persistent Annual Migration Patterns Of A Specialist Seabird, Rachael Orben, Nobuo Kokubun, Abram Fleishman, Alexis Will, Takashi Yamamoto, Scott Shaffer, Rosana Paredes, Akinori Takahashi, Alexander Kitaysky
Persistent Annual Migration Patterns Of A Specialist Seabird, Rachael Orben, Nobuo Kokubun, Abram Fleishman, Alexis Will, Takashi Yamamoto, Scott Shaffer, Rosana Paredes, Akinori Takahashi, Alexander Kitaysky
Faculty Publications, Biological Sciences
Specialization can make animals vulnerable to rapid environmental changes. For long-lived seabirds, foraging specialization may make individuals especially sensitive, as climatic changes are currently occurring over the course of one lifetime. The Bering Sea is a dynamic subarctic and arctic ecosystem where windblown sea ice mediates annual productivity and subsequent pathways to upper trophic levels. Red-legged kittiwakes Rissa brevirostris are endemic surface foraging seabirds specializing on myctophid fishes during reproduction. Their degree of specialization outside the breeding season is less understood. We examined their non-breeding ecology (migration, distribution, isotopic niche) during 4 winters with varying sea ice extent. Although we …
Stable Isotope Analysis Reveals Different Trophic Niche Spaces For Wild And Hatchery Origin Juvenile Chinook Salmon In The Nisqually Delta, Melanie Davis, Isa Woo, Christopher S. Ellings, Sayre Hodgson, Susan De La Cruz
Stable Isotope Analysis Reveals Different Trophic Niche Spaces For Wild And Hatchery Origin Juvenile Chinook Salmon In The Nisqually Delta, Melanie Davis, Isa Woo, Christopher S. Ellings, Sayre Hodgson, Susan De La Cruz
Salish Sea Ecosystem Conference
Hatchery programs have been used as a conservation tool to bolster declining Chinook salmon (Oncorhynchus tshawytscha) populations throughout much of the Salish Sea. In many watersheds, hatchery fish are released concurrently with the natural-origin population, thus raising the potential for density dependent effects via depleted prey resources, territorial behavior, and movement into sub-optimal habitats. Competition during the critical period for early marine growth and survival might have detrimental effects for wild Chinook salmon populations, highlighting the potential importance of a productive delta habitat mosaic. We used an integrated diet approach with stomach content and stable isotope analyses to evaluate differential …
Has Primary Productivity Declined In The Strait Of Georgia Since The 1970s?, Sophia Johannessen
Has Primary Productivity Declined In The Strait Of Georgia Since The 1970s?, Sophia Johannessen
Salish Sea Ecosystem Conference
A strong decline in phytoplankton productivity has been proposed as a principal cause of the decline in salmon survival in the Strait of Georgia over the last four decades. The best estimate of total annual primary productivity in the Strait in the 1970s was 280 gC m-2 yr-1 (Harrison et al., 1983). We tested whether or not primary productivity had declined since that time by calculating recent productivity from regional nitrogen budgets. We constructed the budgets using measurements (collected 2001-2011) of dissolved and particulate nitrogen and stable isotopes of nitrogen in seawater, river water, sinking particles, bottom sediments, atmospheric deposition, …
The Influence Of River Discharge On Fishes And Invertebrates Associated With Small Oil And Gas Platforms In Nearshore Louisiana, David Bradley Reeves
The Influence Of River Discharge On Fishes And Invertebrates Associated With Small Oil And Gas Platforms In Nearshore Louisiana, David Bradley Reeves
LSU Doctoral Dissertations
The nearshore region off Louisiana’s coast is one of the most productive areas in the United States. Nutrient-rich discharge from the Mississippi and Atchafalaya rivers forms the base of this productivity, but it also contributes to the annual formation of a large hypoxic zone (DO < 2.0 mg l-1). This region contains >900 oil and gas platforms (platforms) that are de facto artificial reefs and support fish and invertebrate communities. In this dissertation, I examined how select platform-associated fishes and invertebrates responded to river-driven productivity and hypoxia. Settlement plates were used to compare barnacle production at depths of 2 and 7-m along …
Dietary Overlap Between Jellyfish And Forage Fish In The Northern Gulf Of Mexico, Isabella D'Ambra, William M. Graham, Ruth H. Carmichael, Frank J. Hernandez Jr.
Dietary Overlap Between Jellyfish And Forage Fish In The Northern Gulf Of Mexico, Isabella D'Ambra, William M. Graham, Ruth H. Carmichael, Frank J. Hernandez Jr.
Faculty Publications
Despite the speculations that jellyfish (hydromedusae, siphonophores, scyphomedusae and ctenophores) may compete with forage fish for prey, there are few direct comparisons of their diets. To determine the dietary overlap between Aurelia sp. (Cnidaria, Scyphozoa) and Brevoortia patronus (Goode, 1878) (Pisces, Clupeidae) in the northern Gulf of Mexico, we collected monthly samples in Louisiana, Mississippi and Alabama coastal waters (USA) during summer and early fall 2009−2010. We determined carbon and nitrogen stable isotope ratios in predators and their potential prey, including small plankton (<200 µm) and mesozooplankton (200− 2000 µm), and identified prey in the stomachs of adult Aurelia sp. and B. patronus. Trophic niche overlap was defined using the stable isotope Bayesian …
Stable Isotope (13c/15n) Data Of Meso- And Bathypelagic Nekton, Northern Gulf Of Mexico, March - September 2011, T. M. Richards, E. E. Gipson
Stable Isotope (13c/15n) Data Of Meso- And Bathypelagic Nekton, Northern Gulf Of Mexico, March - September 2011, T. M. Richards, E. E. Gipson
DEEPEND Datasets
These data represent stable isotope values (13C/15N) of eight species of meso- and bathypelagic nekton collected in the northern Gulf of Mexico during spring (22-March to 11-April), summer (23-June to 13-July), and fall (8-September to 27-September) of 2011. The species examined in this study include: Anoplogaster cornuta, Chauliodus sloani, Coccorella atlantica, Gigantura chuni, Gigantura indica, Omosudis lowii, Photostomias guernei, and Stomias affinis. Isotope values are derived from white muscle tissue dissected from 212 individual fish that were collected using large mid-water trawls towed from the surface to depths of either 700 or 1400 m. The samples were collected as part …
Millennial-Scale Trends And Controls In Posidonia Oceanica (L. Delile) Ecosystem Productivity, Carman Leiva-Dueñas, Lourdes López-Merino, Oscar Serrano, Antonio Martínez Cortizas, Miguel-Angel Mateo
Millennial-Scale Trends And Controls In Posidonia Oceanica (L. Delile) Ecosystem Productivity, Carman Leiva-Dueñas, Lourdes López-Merino, Oscar Serrano, Antonio Martínez Cortizas, Miguel-Angel Mateo
Research outputs 2014 to 2021
Posidonia oceanica is a marine phanerogam that buries a significant part of its belowground production forming an organic bioconstruction known as mat. Despite Posidonia seagrass mats have proven to be reliable archives of long-term environmental change, palaeoecological studies using seagrass archives are still scarce. Here we reconstruct four millennia of environmental dynamics in the NE coast of Spain by analysing the carbon and nitrogen stable isotopic composition of P. oceanica sheaths, the proportion of different seagrass organs throughout the seagrass mat and other sedimentological proxies. The palaeoenvironmental reconstruction informs on long-term ecosystem productivity and nutrient loading, which have been linked …
Energy-Rich Mesopelagic Fishes Revealed As A Critical Prey Resource For A Deep-Diving Predator Using Quantitative Fatty Acid Signature Analysis, Chandra Goetsch, Melinda G. Conners, Suzanne M. Budge, Yoko Mitani, William A. Walker, Jeffrey F. Bromaghin, Samantha E. Simmons, Colleen Reichmuth, Daniel P. Costa
Energy-Rich Mesopelagic Fishes Revealed As A Critical Prey Resource For A Deep-Diving Predator Using Quantitative Fatty Acid Signature Analysis, Chandra Goetsch, Melinda G. Conners, Suzanne M. Budge, Yoko Mitani, William A. Walker, Jeffrey F. Bromaghin, Samantha E. Simmons, Colleen Reichmuth, Daniel P. Costa
Biological Sciences Faculty Publications
Understanding the diet of deep-diving predators can provide essential insight to the trophic structure of the mesopelagic ecosystem. Comprehensive population-level diet estimates are exceptionally difficult to obtain for elusive marine predators due to the logistical challenges involved in observing their feeding behavior and collecting samples for traditional stomach content or fecal analyses. We used quantitative fatty acid signature analysis (QFASA) to estimate the diet composition of a wide-ranging mesopelagic predator, the northern elephant seal (Mirounga angustirostris), across five years. To implement QFASA, we first compiled a library of prey fatty acid (FA) profiles from the mesopelagic eastern North Pacific. Given …