Trophic Shifts Introduced To The Saco River Estuary By A Central Secondary Consumer, The Invasive European Green Crab (Carcinus Maenas), Andrew Paul Davidsohn
All Theses And Dissertations
The European green crab (Carcinus maenus) is one of the most notorious invasive species found along the East coast of the United States. Green crabs were introduced to the US in the 1800s when they supposedly rode in ballast water across the Atlantic Ocean. Green crabs are native to the Atlantic coasts of Europe and Northern Africa. Once established on the Atlantic coast of North America, they started to migrate mostly north, and will continue to do so with warming waters due to climate change. (Glude 1955). Warmer winters will lead to greater crab egg survival, increasing the green crabs ...
Assessment Of Mesophotic Coral Ecosystem Connectivity For Proposed Expansion Of A Marine Sanctuary In The Northwest Gulf Of Mexico: Larval Dynamics, 2018 Pacific Northwest National Laboratory; Harbor Branch Oceanographic Institute
Assessment Of Mesophotic Coral Ecosystem Connectivity For Proposed Expansion Of A Marine Sanctuary In The Northwest Gulf Of Mexico: Larval Dynamics, Lysel Garavelli, Michael S. Studivan, Joshua D. Voss, Alyson Kuba, Joana Figueiredo, Laurent M. Cherubin
Oceanography Faculty Articles
In coral reef ecosystems, mesophotic coral habitat (>30 m to the end of the photic zone) are extensions of shallow reefs and contribute to the persistence of coral reef populations. In the North West Gulf of Mexico (NW GOM), the Flower Garden Banks National Marine Sanctuary (FGBNMS) is an isolated reef ecosystem comprising contiguous shallow and mesophotic reefs habitats on two central banks along the margin of the continental shelf. A future expansion of the sanctuary is proposed to include additional mesophotic banks and aims at building a network of protected areas in the NW GOM to ensure the persistence ...
Effect Of Adult Chemical Cues On Molting Of Fiddler Crab Megalopae In Low Salinity Seawater, 2018 University of San Diego
Effect Of Adult Chemical Cues On Molting Of Fiddler Crab Megalopae In Low Salinity Seawater, Sydney Rilum
Undergraduate Honors Theses
Three species of fiddler crabs, Uca minax, U. pugnax, and U. pugilator, are commonly found in estuaries along the Atlantic coast, each with distinct adult habitats differing in salinity and sediment grain size. Prior research has found evidence for larvae exhibiting selective settlement; however, the degree to which and the method by which they choose their species-appropriate habitat to settle in is still unknown. Additionally, a recent study determined that chemical cues from adult crabs stimulate molting in field-caught fiddler crab megalopae, as previously determined in lab-reared megalopae; however, in 35 ppt seawater, few U. minax molted. This study tested ...
The Distribution, Abundance, And Gut Microbiome Of Ribbed Mussel, Geukensia Demissa, Across Natural And Restored Salt Marshes In Jamaica Bay, New York, Bethany Freynk
Coastal wetlands perform valuable functions by protecting shorelines from floodwaters and storm surges, providing habitats for marine species, and improving local water quality. Unfortunately, over half of the area of global wetlands has been lost over the past century. Locally, in Jamaica Bay (Queens, NY), loss of wetlands has exceeded 98%. Restoration of Jamaica Bay marshes began in 2003. Ribbed mussels, Geukensia demissa, live symbiotically with marsh plants and have been shown to stabilize sediments and provide organic nutrients that enhance marsh plant growth. Mussels are suspension feeders, which collect algae from seawater and deposit organic matter in marsh sediments ...
Planktonic Diatom Species Succession In San Francisco Bay (September 2015 - December 2017), 2018 The University of San Francisco
Planktonic Diatom Species Succession In San Francisco Bay (September 2015 - December 2017), Theresa Keith
Undergraduate Honors Theses
Since Hutchinson first described the “Paradox of the Plankton” in 1961, research has been done to determine how and why the coexistence of so many different species of phytoplankton is possible. A critical part of this question is species succession, or how the assemblage of phytoplankton in a region changes over time. This study examines the succession of planktonic diatoms in San Francisco Bay, CA (USA) from September 2015 through December 2017 using phytoplankton samples and environmental data. Periodic sampling was conducted at a site in the Golden Gate Strait and taxa were identified using light microscopy and scanning electron ...
Regional Variation In Migratory Behavior And Reproductive Output Of The Gulf Of Mexico Blue Crab Spawning Stock, 2018 The University of Southern Mississippi
Regional Variation In Migratory Behavior And Reproductive Output Of The Gulf Of Mexico Blue Crab Spawning Stock, Adam Kemberling
The overarching goal of this research was to better understand the structure and boundaries of the blue crab stock(s) in the Gulf of Mexico, focusing on large-scale movements of spawning female crabs. Because spawning location is a primary determinant of larval transport pathways, understanding spawning locations and offshore movements of female blue crabs can inform stock identification and potentially clarify the somewhat conflicting population genetic information available for blue crabs. A large-scale mark-recapture study was conducted through the partnership of state/federal management agencies, the commercial fishing industry, recreational fisherman, tourists, and numerous academic institutions to shed light on ...
Ameliorating Ocean Acidification: A Model Relating Pco2, Irradiance And Leaf Area Index Of Zostera Marina (Eelgrass) In Padilla Bay, Wa, 2018 Western Washington University
Ameliorating Ocean Acidification: A Model Relating Pco2, Irradiance And Leaf Area Index Of Zostera Marina (Eelgrass) In Padilla Bay, Wa, Tyler Tran
Graduate Student Symposium
In nearshore, soft-sediment habitats of the Salish Sea, eelgrass (Zostera marina L.) meadows have been identified as potential mitigators of ocean acidification (OA) because their photosynthetic activity can decrease pCO2, increase pH and provide refuge for organisms sensitive to OA. The diurnal light cycle controls photosynthetic production of eelgrass and therefore, along with tidal cycles, exerts strong controls on variations in pCO2 in nearshore environment. In this study, we investigate the carbon uptake rates for eelgrass under varying light, ambient pCO2 conditions and eelgrass densities (leaf area index). The magnitude of changes predicted based on experimentally derived photosynthetic rates, measured ...
Fine Grained Compositional Analysis Of Port Everglades Inlet Microbiome Using High Throughput Dna Sequencing, 2018 Nova Southeastern University
Fine Grained Compositional Analysis Of Port Everglades Inlet Microbiome Using High Throughput Dna Sequencing, Lauren M. O'Connell, Song Gao, Donald S. Mccorquodale Jr., Jay M. Fleisher, Jose Lopez
Oceanography Faculty Articles
Similar to natural rivers, manmade inlets connect inland runoff to the ocean. Port Everglades Inlet (PEI) is a busy cargo and cruise ship port in South Florida, which can act as a source of pollution to surrounding beaches and offshore coral reefs. Understanding the composition and fluctuations of bacterioplankton communities (“microbiomes”) in major port inlets is important due to potential impacts on surrounding environments. We hypothesize seasonal microbial fluctuations, which were profiled by high throughput 16S rRNA amplicon sequencing and analysis.
Methods & Results
Surface water samples were collected every week for one year. A total of four samples per ...
Waking Students Up With Explorations Of Metabolic Dormancy: A Pilot Study Of The Killifish Cure, 2018 Portland State University
Waking Students Up With Explorations Of Metabolic Dormancy: A Pilot Study Of The Killifish Cure, Emma Goodwin, Daniel E. Zajic, Jason E. Podrabsky, Erin E. Shortlidge
Student Research Symposium
A national goal for education reform is to provide opportunities for all biology undergraduates to participate in research. Traditionally, undergraduates gain research experience by apprenticing in faculty-led research labs; however, only a fraction of undergraduates have access to these opportunities. Course-based Undergraduate Research Experiences (CUREs) are a type of laboratory course where students conduct experiments to answer relevant research questions, thus allowing undergraduates to gain authentic research experience at a large scale. To increase equity in opportunities for biology undergraduates to participate in authentic scientific research at Portland State University (PSU), we have designed and implemented a CURE to pilot ...
Ichthyology Scientific Collection Spreadsheet, 2018 Pittsburg State University
Ichthyology Scientific Collection Spreadsheet, Karisa Boyer
No abstract provided.
Spatial Variation In Basal Resources And Trophic Position Of Selected Fishes Of The North-Central Gulf Of Mexico, 2018 The University of Southern Mississippi
Spatial Variation In Basal Resources And Trophic Position Of Selected Fishes Of The North-Central Gulf Of Mexico, Christopher Fleming
The North-central Gulf of Mexico is a complex hydrologic environment with freshwater influx that varies on spatial and temporal scales. Freshwater input exerts influence on the isotope values of organisms living in coastal ecosystems. The objectives of this study were to determine relationships between total length and isotope value, estimate basal resource usage and trophic position of target species from Mississippi Sound, reef, and pelagic environments, and identify differences and similarities in spatial patterns of collection. Muscle tissue samples were collected from October 2014 through September 2015. Stable isotope analysis identified a trophic gradient extending from nearshore to offshore, with ...
Correlation Of Environmental Exposure To Polycyclic Aromatic Hydrocarbons And Polymorphisms In The Proto-Oncogene V-Rel Using Wild Atlantic Menhaden, Chelsea Rose Defelice
Seton Hall University Dissertations and Theses (ETDs)
Hurricane Sandy critically damaged the Atlantic coast of New Jersey in the fall of 2012. This was recorded as the largest storm to hit the Atlantic Ocean, which was manifested by its destruction on the homes and communities of those along the coastline. Contamination of surrounding waters due to this natural disaster was of great interest. The re-suspension of land-based pollution is proposed to make these contaminants more bioavailable to coastal species, such as Atlantic menhaden (Brevoortia tyrannus), which are a crucial biomonitoring species through their ecological and economic uses. A proposed increase of body burdens in Atlantic menhaden could ...
Virginia Game Fish Tagging Program Annual Report 2017, 2018 Virginia Institute of Marine Science
Virginia Game Fish Tagging Program Annual Report 2017, Susanna Musick, Lewis Gillingham
Through 2017, the Virginia Game Fish Tagging Program (VGFTP) has maintained a 22-year database of rec-ords for tagged and recaptured fish. The program is a cooperative project of the Virginia Saltwater Fishing Tournament (VSFT) under the Virginia Marine Resources Commission-(VMRC) and the Virginia Institute of Marine Science (VIMS) of the College of William and Mary (under the VIMS Marine Advisory Program).
Toxicological Effects Of Commercial Sunscreens On Coral Reef Ecosystems: New Protocols For Coral Restoration, 2018 Nova Southeastern University
Toxicological Effects Of Commercial Sunscreens On Coral Reef Ecosystems: New Protocols For Coral Restoration, Emilie C. Johnsen
HCNSO Student Capstones
The primary purpose of consumer-grade sunscreen is to protect skin from harmful UVA and UVB rays. This market has grown during the past 80 years, and environmental contamination from increasing amounts of sunscreen compounds have created concern. In particular, impacts on ocean ecosystems have inspired investigations and toxicological research on their effects on marine life. Unfortunately, such studies using marine flora and fauna are scarce, and the impact of chemical exposure to consumer sunscreens is neither adequately measured nor completely understood. In a pilot study by the Coral Restoration Foundation, in situ toxicity exposure to 10 different brands of sunscreens ...
Monitoring The Abundance Of American Shad And River Herring In Virginia's Rivers - 2017 Annual Report, 2018 Virginia Institute of Marine Science
Monitoring The Abundance Of American Shad And River Herring In Virginia's Rivers - 2017 Annual Report, Eric J. Hilton, Rob Latour, Patrick E. Mcgrath, Brian Watkins, Ashleigh Magee
This report describes the results of the twentieth year of a continuing study to estimate the relative abundance and assess the status of American shad (Alosa sapidissima) stocks in Virginia by monitoring the spawning runs in the James, York and Rappahannock rivers in spring 2017, evaluating hatchery programs, and contributing to coast-wide assessments (ASMFC 2007). We also report on two fishery-independent monitoring programs, one using staked gillnets in the Rappahannock River (year 2) and the other using anchor gillnets in the Chickahominy River (year 3; a major tributary of the James River),to determine relative abundance and stock structure for ...
Hawai'i Wildlife Fund V. County Of Maui, 2018 Alexander Blewett III School of Law at the University of Montana
Hawai'i Wildlife Fund V. County Of Maui, Lowell J. Chandler
Public Land and Resources Law Review
In Hawai’i Wildlife Fund v. County of Maui, the Ninth Circuit held that the plain language of the Clean Water Act provides jurisdiction over indirect discharges of pollutants from a point source into groundwater that is shown to be connected to navigable waters. The court found that studies confirmed pollutants entering the Pacific Ocean were fairly traceable to the County of Maui’s sewage disposal wells. In affirming the district court’s ruling, the Ninth Circuit held that Maui County violated the Clean Water Act by discharging pollutants into a navigable water without the required permit. The court also ...
Relational Values And Valuation: Challenges, And Possibilities, 2018 The Univ. of British Columbia, Canada
Relational Values And Valuation: Challenges, And Possibilities, Kai Chan
Salish Sea Ecosystem Conference
Although the ecological valuation literature has been focused largely on instrumental values, there is increasing recognition that relational values might play a crucial and related role in environmental policy and practice. For example, relational values—as preferences, principles and virtues about human relationships involving nature—are identified as central in the IPBES Conceptual Framework, and recent work has investigated the implications of these for conservation and ecosystem management. But what are the implications of relational values for ecosystem valuation? In this talk, I address this question in three points. First, whereas instrumental or economic values are values of a thing ...
Discerning Population Connectivity And Natal Origins Of Pacific Herring (Clupea Pallasi): Inferences On Population Structure From Otolith Chemistry, 2018 The Univ. of British Columbia, Canada
Discerning Population Connectivity And Natal Origins Of Pacific Herring (Clupea Pallasi): Inferences On Population Structure From Otolith Chemistry, Wade Smith, Tony Pitcher, Margot Hessing-Lewis, Brian P.V. Hunt, Evgeny A. Pakhomov
Salish Sea Ecosystem Conference
Pacific herring, Clupea pallasi, undertake annual migrations between feeding and spawning grounds that link life stages, habitats, populations, communities, and ecosystems. However, movement patterns of these highly mobile fish are poorly understood. Declines in Pacific herring abundance and slow population recoveries in the absence of fishing pressure have elevated concerns over the status of this ecologically, economically, and culturally important species. Pacific herring spawn on substrate in nearshore habitats where eggs and larvae develop for approximately two weeks before hatching. Early development within discrete spawning grounds could facilitate the incorporation of distinctive chemical signatures within otoliths that could be used ...
Assessing Biological Condition In Small Streams Of The Puget Sound Lowlands Through Collaborative Regional Monitoring, 2018 U.S. Geological Survey, United States
Assessing Biological Condition In Small Streams Of The Puget Sound Lowlands Through Collaborative Regional Monitoring, Richard Sheibley, Curtis Degasperi, Chad Larson, Brandi Lubliner, Leska Fore, Keunyea Song
Salish Sea Ecosystem Conference
In 2015, the condition of Puget Sound Lowland streams was evaluated by collecting data for stream invertebrates, algae, water and sediment quality, and instream and riparian habitat. The study was designed and implemented as part of the Stormwater Action Monitoring program, a collaborative, regional stormwater monitoring program funded by more than 90 Western Washington cities and counties, the ports of Seattle and Tacoma, and the Washington State Department of Transportation. The goal of this long term program is to inform stakeholders on the status and trends of small streams within the Puget Lowlands and to track whether stream condition improves ...
Understanding The Implications Of A Changing Environment On Harvested Bivalve Populations Using Habitat Suitability Models, 2018 U.S. Environmental Protection Agency, United States
Understanding The Implications Of A Changing Environment On Harvested Bivalve Populations Using Habitat Suitability Models, Ted Dewitt, Nathaniel Lewis, Eric Fox, Stephen Pacella
Salish Sea Ecosystem Conference
Habitat suitability models are useful to forecast how environmental change may affect the abundance or distribution of species of interest. In the case of harvested bivalves, those models may be used to estimate the vulnerability of this valued ecosystem good to stressors. Using literature-derived natural history information, rule-based habitat suitability models were constructed in a GIS for several bivalve species (Clinocardium nuttallii, Mya arenaria, and Tresus capax) that are recreationally and commercially harvested in NE Pacific estuaries, including in the Salish Sea. Spatially-explicit habitat maps were produced for two Oregon estuaries using environmental data (salinity, depth, sediment grain size, and ...