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Gulf of mexico

Hannah B Vander Zanden, Alan B Bolten, Anton D Tucker, Kristen M Hart, Margaret M Lamont, Ikuko Fujisaki, Kimberly J Reich, David S Addison, Katherine L Mansfield, Katrina F Phillips, Mariela Pajuelo, Karen A Bjorndal
Assessments of large-scale disasters, such as the Deepwater Horizon oil spill, are problematic because while measurements of post-disturbance conditions are common, measurements of pre-disturbance baselines are only rarely available. Without adequate observations of pre-disaster organismal and environmental conditions, it is impossible to assess the impact of such catastrophes on animal populations and ecological communities. Here, we use long-term biological tissue records to provide pre-disaster data for a vulnerable marine organism...
October 2016: Ecological Applications: a Publication of the Ecological Society of America
Helen K White, Chloe H Wang, Patrick L Williams, David M Findley, Alana M Thurston, Rachel L Simister, Christoph Aeppli, Robert K Nelson, Christopher M Reddy
To investigate the long-term weathering of oil from the Deepwater Horizon (DWH) incident, oil-soaked sand patties were collected from Gulf of Mexico beaches from Florida to Alabama over a three-year period from 2012 to 2014. Analysis of oil residues by gas chromatography with flame ionization detection (GC-FID), thin-layer chromatography with flame ionization detection (TLC-FID), and Fourier transform infrared spectroscopy (FT-IR) indicated uniformity in their chemical composition. Some variability within and between samples was observed, arising from differences in exposure to light and water, which increase the amount of weathering...
October 14, 2016: Marine Pollution Bulletin
Justin R Perrault, Katherine D Bauman, Taylor M Greenan, Patricia C Blum, Michael S Henry, Catherine J Walsh
Blooms of Karenia brevis (also called red tides) occur almost annually in the Gulf of Mexico. The health effects of the neurotoxins (i.e., brevetoxins) produced by this toxic dinoflagellate on marine turtles are poorly understood. Florida's Gulf Coast represents an important foraging and nesting area for a number of marine turtle species. Most studies investigating brevetoxin exposure in marine turtles thus far focus on dead and/or stranded individuals and rarely examine the effects in apparently "healthy" free-ranging individuals...
October 1, 2016: Aquatic Toxicology
Guadalupe Barrera-Escorcia, Irma Wong-Chang, Carlos Leopoldo Fernández-Rendón, Alfonso Vázquez Botello, Bruno Gómez-Gil, Marcial Leonardo Lizárraga-Partida
Oysters can accumulate potentially pathogenic water bacteria. The objective of this study was to compare two procedures to quantify Vibrio species present in oysters to determine the most sensitive method. We analyzed oyster samples from the Gulf of Mexico, commercialized in Mexico City. The samples were inoculated in tubes with alkaline peptone water (APW), based on three tubes and four dilutions (10(-1) to 10(-4)). From these tubes, the first quantification of Vibrio species was performed (most probable number (MPN) from tubes) and bacteria were inoculated by streaking on thiosulfate-citrate-bile salts-sucrose (TCBS) petri dishes...
November 2016: Environmental Monitoring and Assessment
Ernesto Campos
New bivalve host records for four pinnotherid crabs of the Mexican Pacific are reported: Fabia subquadrata Dana, 1851, in Modiolus capax (Conrad, 1837); Opisthopus transversus Rathbun, 1893, in Tivela stultorum (Mawe, 1823); Pinnaxodes gigas (Green, 1992), in Pinna rugosa (Sowerby, 1835), and Panopea generosa Gould, 1850; and Tumidotheres margarita (Smith, 1870), in Nodipecten subnodosus (Sowerby, 1835). The southernmost distribution of F. subquadrata is extended to about 600 km along the west coast of the Baja California Peninsula; the distribution of P...
September 23, 2016: Zootaxa
Stephen E Cassle, Nelmarie Landrau-Giovannetti, Lisa L Farina, Angelique Leone, James F X Wellehan, Nicole I Stacy, Patrick Thompson, Hada Herring, Blair Mase-Guthrie, Uriel Blas-Machado, Jeremiah T Saliki, Michael T Walsh, Thomas B Waltzek
A recently deceased juvenile male bottlenose dolphin (Tursiops truncatus) was found floating in the Gulf of Mexico, off Sand Key in Clearwater, Florida. At autopsy, we identified pneumonia and a focus of malacia in the right cerebrum. Cytologic evaluation of tissue imprints from the right cerebrum revealed fungal hyphae. Fungal cultures of the lung and brain yielded Aspergillus fumigatus, which was confirmed by amplification of a portion of the fungal nuclear ribosomal internal transcribed spacer 2 region sequence...
November 2016: Journal of Veterinary Diagnostic Investigation
Kyle Donnelly, Thomas B Waltzek, James F X Wellehan, Nicole I Stacy, Maria Chadam, Brian A Stacy
Mycobacteriosis is infrequently reported in free-ranging sea turtles. Nontuberculous Mycobacterium haemophilum was identified as the causative agent of disseminated mycobacteriosis in a juvenile leatherback turtle (Dermochelys coriacea) that was found stranded on the Atlantic coast of Florida. Disseminated granulomatous inflammation was identified histologically, most notably affecting the nervous system. Identification of mycobacterial infection was based on cytologic, molecular, histologic, and microbiologic methods...
November 2016: Journal of Veterinary Diagnostic Investigation
Peter C Van Metre, Jeffrey W Frey, MaryLynn Musgrove, Naomi Nakagaki, Sharon Qi, Barbara J Mahler, Michael E Wieczorek, Daniel T Button
Nitrogen sources in the Mississippi River basin have been linked to degradation of stream ecology and to Gulf of Mexico hypoxia. In 2013, the USGS and the USEPA characterized water quality stressors and ecological conditions in 100 wadeable streams across the midwestern United States. Wet conditions in 2013 followed a severe drought in 2012, a weather pattern associated with elevated nitrogen concentrations and loads in streams. Nitrate concentrations during the May to August 2013 sampling period ranged from <0...
September 2016: Journal of Environmental Quality
Paola C López-Duarte, F Joel Fodrie, Olaf P Jensen, Andrew Whitehead, Fernando Galvez, Benjamin Dubansky, Kenneth W Able
Genomic and physiological responses in Gulf killifish (Fundulus grandis) in the northern Gulf of Mexico have confirmed oil exposure of resident marsh fish following the Macondo blowout in 2010. Using these same fish, we evaluated otolith microchemistry as a method for assessing oil exposure history. Laser-ablation inductively-coupled-plasma mass spectrometry was used to analyze the chemical composition of sagittal otoliths to assess whether a trace metal signature could be detected in the otoliths of F. grandis collected from a Macondo-oil impacted site in 2010, post-spill relative to pre-spill, as well as versus fish from areas not impacted by the spill...
2016: PloS One
Tony Gutierrez, David Berry, Andreas Teske, Michael D Aitken
The Deepwater Horizon (DWH) oil spill led to rapid microbial community shifts in the Gulf of Mexico, including the formation of unprecedented quantities of marine oil snow (MOS) and of a massive subsurface oil plume. The major taxa that bloomed in sea surface oil slicks during the spill included Cycloclasticus, and to a lesser extent Halomonas, Alteromonas, and Pseudoalteromonas-organisms that grow and degrade oil hydrocarbons aerobically. Here, we show that sea surface oil slicks at DWH contained obligate and facultative anaerobic taxa, including members of the obligate anaerobic phylum Fusobacteria that are commonly found in marine sediment environments...
July 27, 2016: Microorganisms
Nancy J Brown-Peterson, Michelle O Krasnec, Claire R Lay, Jeffrey M Morris, Robert J Griffitt
The Deepwater Horizon (DWH) oil spill released millions of barrels of crude oil into the northern Gulf of Mexico, much of which remains associated with sediments and can have continuing impacts on biota. Juvenile southern flounder (Paralichthys lethostigma) were exposed for 28 d in the laboratory under controlled conditions to reference and DWH oil-contaminated sediments collected from coastal Louisiana to assess the impacts on an ecologically and commercially important benthic fish. The measured PAH concentrations in the sediments ranged from 0...
September 27, 2016: Environmental Toxicology and Chemistry
Jesús Angel de León-González, Eduardo F Balart
A new species of Websterinereis Pettibone, 1971, Websterinereis pettiboneae sp. n. is described from La Paz Bay, Gulf of California, Mexico. This species is similar to Websterinereis foli (Fauvel, 1930) in the neuropodial falcigers shape, but can be separated by the tentacular cirri length, notopodial prechaetal lobe shape, and the size of the notopodial dorsal and ventral ligules on posterior parapodia. Websterinereis foli is redescribed based upon type material. Additional observations on the inter-annual density variation of Websterinereis pettiboneae sp...
2016: ZooKeys
Ana Rosa Vázquez-Bader, Adolfo Gracia
We examined the diversity, abundance, distribution, and average size of squat lobsters collected during eight cruises conducted on the continental shelf and slope of the Gulf of Mexico (Mexican/USA border to the Caribbean Sea). Six species belonging to two genera of Chirostyloidea, and 25 species of four genera of Galatheoidea are reported. A total of 1513 specimens were obtained of which 95 were Chirostylidae, two Galatheidae, 285 Munidopsidae, and 1131 Munididae. Of the species collected, 13.8% were only known from Caribbean Sea...
2016: ZooKeys
Prosanta Chakrabarty, Glynn A O'Neill, Brannon Hardy, Brandon Ballengee
BACKGROUND: The 2010 Gulf of Mexico Oil Spill took place over 180,000 square kilometers during a 12-week period over five years ago; however, this event continues to influence the development and distribution of organisms in and around the region of the disaster. Here we examine fish species that may have been most affected by noting their past distribution in the region of the spill and examining data of known collecting events over the last 10 years (five years prior to the spill, five years post spill)...
2016: Biodiversity Data Journal
Alejandra Martínez-Melo, Francisco Alonso Solís-Marín, Blanca Estela Buitrón-Sánchez, Alfredo Laguarda-Figueras
BACKGROUND: Research on echinoderms in Mexico began in the late nineteenth century. We present a dataset that includes the taxonomic and geographic information of irregular echinoids from Mexico, housed in four collections: 1) Colección Nacional de Equinodermos "Ma. Elena Caso Muñoz" from the Instituto de Ciencias del Mar y Limnología (ICML), Universidad Nacional Autónoma de México (UNAM); 2) Invertebrate Zoology Collection, Smithsonian Museum of Natural History, Washington, D.C...
2016: Biodiversity Data Journal
João Bráullio de L Sales, Luis F da S Rodrigues-Filho, Yrlene do S Ferreira, Jeferson Carneiro, Nils E Asp, Paul W Shaw, Manuel Haimovici, Unai Markaida, Jonathan Ready, Horacio Schneider, Iracilda Sampaio
Although recent years have seen an increase in genetic analyses that identify new species of cephalopods and phylogeographic patterns, the loliginid squid of South America remain one of the least studied groups. The suggestion that Doryteuthis plei may represent distinct lineages within its extensive distribution along the western Atlantic coasts from Cape Hatteras, USA (36°N) to northern Argentina (35°S) is consistent with significant variation in a number of environmental variables along this range including in both temperature and salinity...
September 15, 2016: Molecular Phylogenetics and Evolution
Tara A Duffy, William Childress, Ralph Portier, Edward J Chesney
Bay anchovy (Anchoa mitchilli) is an ecologically important zooplanktivorous fish inhabiting estuaries of the Gulf of Mexico and eastern North America from Maine to Florida. Because they have a protracted spawning season (spring through fall) and are abundant at all life stages in coastal estuaries, their eggs and larvae likely encountered oil that reached the coast during the Deepwater Horizon oil spill. We compared responses to oil exposure at different life stages and at lethal and sublethal conditions using acute, 24h exposures...
September 15, 2016: Ecotoxicology and Environmental Safety
Chunya Huang, Stephen W Schaeffer, Charles R Fisher, Dominique A Cowart
BACKGROUND: Vestimentiferan tubeworms are some of the most recognizable fauna found at deep-sea cold seeps, isolated environments where hydrocarbon rich fluids fuel biological communities. Several studies have investigated tubeworm population structure; however, much is still unknown about larval dispersal patterns at Gulf of Mexico (GoM) seeps. As such, researchers have applied microsatellite markers as a measure for documenting the transport of vestimentiferan individuals. In the present study, we investigate the utility of microsatellites to be cross-amplified within the escarpiid clade of seep vestimentiferans, by determining if loci originally developed for Escarpia spp...
2016: PeerJ
P Soupy Dalyander, Michelle Meyers, Brady Mattsson, Gregory Steyer, Elizabeth Godsey, Justin McDonald, Mark Byrnes, Mark Ford
Coastal ecosystem management typically relies on subjective interpretation of scientific understanding, with limited methods for explicitly incorporating process knowledge into decisions that must meet multiple, potentially competing stakeholder objectives. Conversely, the scientific community lacks methods for identifying which advancements in system understanding would have the highest value to decision-makers. A case in point is barrier island restoration, where decision-makers lack tools to objectively use system understanding to determine how to optimally use limited contingency funds when project construction in this dynamic environment does not proceed as expected...
December 1, 2016: Journal of Environmental Management
Alan J Mearns, Donald J Reish, Philip S Oshida, Ann Michelle Morrison, Mary Ann Rempel-Hester, Courtney Arthur, Nicolle Rutherford, Rachel Pryor
This review covers selected 2015 articles on the biological effects of pollutants and human physical disturbances on marine and estuarine plants, animals, ecosystems and habitats. The review, based largely on journal articles, covers field and laboratory measurement activities (bioaccumulation of contaminants, field assessment surveys, toxicity testing and biomarkers) as well as pollution issues of current interest including endocrine disrupters, emerging contaminants, wastewater discharges, dredging and disposal, etc...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
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