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Articles 1 - 9 of 9
Full-Text Articles in Life Sciences
Assessing The Effects Of The Mud Snail, Ilyanassa Obsoleta, On The Benthic Microalgal Community In A Pristine Saltmarsh, Miranda Gore
Assessing The Effects Of The Mud Snail, Ilyanassa Obsoleta, On The Benthic Microalgal Community In A Pristine Saltmarsh, Miranda Gore
Theses and Dissertations
Saltmarshes are among the most productive ecosystems globally. At North Inlet estuary, South Carolina, about one third of the primary production comes from benthic microalgae. During the tidal cycle, mobile microalgae vertically migrate through the upper 3 mm of sediment. At low tide, algae are vulnerable to a variety of grazers, including the mud snail, Ilyanassa obsoleta, which is abundant in tidal creeks. Many species of intertidal snails have been shown to significantly alter the community structure and density of microalgae within the sediment. The purpose of this study was to determine how I. obsoleta affects the benthic microalgae community …
Ménage À Trois In The Atlantic Brief Squid (Lolliguncula Brevis): Prior Presence Affects Mate Choice, Rachel A. Schlessinger
Ménage À Trois In The Atlantic Brief Squid (Lolliguncula Brevis): Prior Presence Affects Mate Choice, Rachel A. Schlessinger
Theses and Dissertations
Lolliguncula brevis given prior presence experienced a significantly greater number of contacts with opposite sex squid than rivals. Males given prior presence also spent significantly more time in proximity to females than rivals. This suggests that for both female and male Atlantic brief squid, having prior presence influences mating behavior.
Applicability Of Lidar Technology In Saltmarshes: Landscape-Scale Predictive Models To Local-Scale Biomass Estimation, James Dean Edwards Jr.
Applicability Of Lidar Technology In Saltmarshes: Landscape-Scale Predictive Models To Local-Scale Biomass Estimation, James Dean Edwards Jr.
Theses and Dissertations
The management of saltmarshes requires detailed knowledge of the underlying processes driving their distribution in both time and space to make appropriate management decisions. With most of the world’s population living in the coastal zone and rising sea levels, one of our most important natural resources in the coastal zone faces increasing threat of collapse. This study uses the current state of Light Detection and Ranging (LiDAR) technology to model and predict saltmarsh distribution at a landscape-scale and provide evidence that a terrestrial laser scanner (TLS) can be used to estimate saltmarsh biomass for inclusion into existing models.
Land cover …
Biodegradation Of Highly Weathered Deepwater Horizon Oil, Joel T. Bostic
Biodegradation Of Highly Weathered Deepwater Horizon Oil, Joel T. Bostic
Theses and Dissertations
Oil from the Deepwater Horizon (DwH) spill continues to be found on beaches five years post-spill. Understanding the role of microbes in removing DwH oil from sandy beaches is necessary to elucidate the fate of DwH oil in the coastal zone. Oiled sand patties and non-oiled sand were collected from affected beaches five years post- DwH. Biomarkers in oiled sand indicated that sand patties originated from the DwH spill, however the oil was heavily weathered and dominated by oxygenated hydrocarbons. Microbial communities, as measured by phospholipid fatty acids (PLFA), were present on oiled sand patties and distinct from microbes on …
Decadal Salinity Changes In The Oceanic Subtropical Gyres And Connection To Changes In The Global Water Cycle, Bryce Andrew Melzer
Decadal Salinity Changes In The Oceanic Subtropical Gyres And Connection To Changes In The Global Water Cycle, Bryce Andrew Melzer
Theses and Dissertations
There is evidence that the global water cycle has been undergoing an intensification over several decades as a response to increasing atmospheric temperatures, particularly in regions with skewed evaporation – precipitation (E-P) patterns such as the oceanic subtropical gyres. However, observational data (rain gauges, etc.) can be quite sparse over such areas due to the inaccessibility of open ocean regions. This study utilizes in situ data, reanalysis, and model outputs to infer interannual to decadal scale trends in surface freshwater forcing within remote, evaporation-dominated subtropical regions of the ocean as they pertain to the past and present state of the …
Development And Application Of Foraminiferal Carbonate System Proxies To Quantify Ocean Acidification In The California Current, Emily B. Osborne
Development And Application Of Foraminiferal Carbonate System Proxies To Quantify Ocean Acidification In The California Current, Emily B. Osborne
Theses and Dissertations
The oceanic uptake of anthropogenic carbon has mitigated climate change, but has also resulted in a global average 0.1 decline in surface ocean pH over 20th century known as ocean acidification. The parallel reduction in carbonate ion concentration ([CO32-]) and the saturation state of seawater (Ω) has caused many major calcium carbonate-secreting organisms such as planktonic foraminifera to exhibit impaired calcification. We develop proxy calibrations and down core records that use calcification and geochemical characteristics of planktonic foraminifera as proxies for the marine carbonate system. This study focuses specifically on the surface ocean chemistry of the California Current Ecosystem (CCE), …
Utilization Of Satellite-Derived Salinity To Study Indian Ocean Climate Variability, Joseph Matthew D’Addezio
Utilization Of Satellite-Derived Salinity To Study Indian Ocean Climate Variability, Joseph Matthew D’Addezio
Theses and Dissertations
For several decades, researchers have explored Indian Ocean climate variability primarily using numerical models because of a lack of observations. Remote sensing technology has helped overcome this scarcity of observational data, but satellite-derived salinity has only been recently made available by the ESA’s Soil Moisture and Ocean Salinity (SMOS, operating since November 2009-present) and NASA’s Aquarius SAC-D (operated during June 2011-June 2015) satellites. Along with the Lagrangian in situ Argo floats array, these new datasets may be used to validate widely used numerical models, such as the HYbrid Coordinate Ocean Model (HYCOM), and also potentially observe new salinity phenomena that …
Mislabeling Of Commercial Atlantic Cod (Gadus Morhua) Products In Spain, Joshua Helgoe
Mislabeling Of Commercial Atlantic Cod (Gadus Morhua) Products In Spain, Joshua Helgoe
Theses and Dissertations
The mislabeling of commercial fish products is a pervasive, worldwide problem. Most consumers of seafood are unaware this issue directly affects them and can even have negative impacts on their health. Mislabeling occurs when a product’s label is inconsistent with its content. Although mislabeling can be unintentional, deliberate mislabeling is a more common trend to increase profits and/or bypass fishing regulations - a form of economic fraud. Unfortunately, oversight, enforcement, and research are vastly insufficient in relation to the global scale of the problem. In order to add to the small knowledge base on European mislabeling rates, determine if overfished …
The Effect Of Depth On Development And Sexual Dimorphism Of The Sonic System In Deep Sea Neobythitine Fishes: The Upper Continental Slope, Heba Ali
Theses and Dissertations
Abstract
Background: Cusk-eels from the subfamily Neobythiitinae are one of the major groups of sound-producing fishes on the continental slope. Sounds have never been recorded from a member of this subfamily, and sonic anatomy is considered a proxy for sound production. As the first part of a study on the effects of depth on sonic anatomy, we examined three relatively shallow species from the upper continental slope.
Methods: Three species (Hoplobrotula armata, Neobythites longipes and Neobythites unimaculatus) were examined for sonic anatomy (skeleton, swimbladder and sonic muscles), and sonic and epaxial muscle fibers were measured for diameter. …