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Articles 1 - 28 of 28
Full-Text Articles in Life Sciences
Do Mesopelagic Fish Biomass Patterns Change In Response To Major Oceanographic Features In The Northern Gulf Of Mexico?, Ian M. Areford
Do Mesopelagic Fish Biomass Patterns Change In Response To Major Oceanographic Features In The Northern Gulf Of Mexico?, Ian M. Areford
All HCAS Student Capstones, Theses, and Dissertations
In recent years interest in mesopelagic fishes has grown due to their ecological significance and economic potential. A major outstanding question is how the assemblage is potentially structured by mesoscale (10 - 100s km) oceanographic features such as eddies, fronts, and riverine plumes. Mesoscale features are known to influence micronekton and zooplankton’s spatial distributions but data on individual mesopelagic fish species’ responses are limited. The Gulf of Mexico (GoM) is an area of particular interest due to its diverse mesopelagic fish assemblage, its well-defined mesoscale oceanographic features, its history of anthropogenic impacts such as oil spills, and its diverse mesopelagic …
The Effect Of Acidic Ph On Growth Kinetics, Biomass Productivity, And Prima-Ry Metabolite Contents Of Euglena Sp., Istini Nurafifah, Muhammad Andhi Hardianto, Tia Erfianti, Ria Amelia, Khusnul Qonita Maghfiroh, Dedy Kurnianto, Dwi Umi Siswanti, Brilian Ryan Sadewo, Renata Adaranyssa Egistha Putri, Eko Agus Suyono
The Effect Of Acidic Ph On Growth Kinetics, Biomass Productivity, And Prima-Ry Metabolite Contents Of Euglena Sp., Istini Nurafifah, Muhammad Andhi Hardianto, Tia Erfianti, Ria Amelia, Khusnul Qonita Maghfiroh, Dedy Kurnianto, Dwi Umi Siswanti, Brilian Ryan Sadewo, Renata Adaranyssa Egistha Putri, Eko Agus Suyono
Makara Journal of Science
Euglena is a microalga with the potential to be an environmentally friendly renewable energy resource. The pH value is a crucial factor in micro-algal cultivation. Changes in pH affect the growth and development of microalgae, including the production of biomass and primary metabolites, such as proteins, carbohydrates, and lipids. In this study, Euglena sp. was grown on Cramer-Myers medium and subjected to various acidic conditions. This study aimed to determine the effect of pH on the growth kinetics, biomass, carbohydrate, lipid, and protein contents of Euglena sp. The Euglena sp. culture was optimized at various pH values of 2.5, 3.5, …
Seagrass Posidonia Escarpments Support High Diversity And Biomass Of Rocky Reef Fishes, Oscar Serrano Gras, Karina Inostroza, Glenn Hyndes, Alan M. Friedlander, Eduard Serrano, Caitlin Rae, Enric Ballesteros
Seagrass Posidonia Escarpments Support High Diversity And Biomass Of Rocky Reef Fishes, Oscar Serrano Gras, Karina Inostroza, Glenn Hyndes, Alan M. Friedlander, Eduard Serrano, Caitlin Rae, Enric Ballesteros
Research outputs 2022 to 2026
Although seagrass meadows form a relatively homogenous habitat, escarpments, which form three-dimensional structures and originate from the erosion of seagrass peat, can provide important habitat for reef fishes. Here, we compare fish assemblages and habitat structural complexity among seagrass Posidonia australis escarpments and canopies, as well as limestone reef habitats, to understand the role of seagrass escarpments as reef fish habitat in Shark Bay, Western Australia. The total number of fish species, fish biomass, and top predator biomass were significantly higher in seagrass escarpments and reef habitats than in seagrass canopies due to lower habitat structural complexity and thus becoming …
The Deep-Pelagic Sergestid Shrimp Assemblage In The Gulf Of Mexico In The Vicinity Of The Deepwater Horizon Oil Spill, Erik W. Hine
The Deep-Pelagic Sergestid Shrimp Assemblage In The Gulf Of Mexico In The Vicinity Of The Deepwater Horizon Oil Spill, Erik W. Hine
All HCAS Student Capstones, Theses, and Dissertations
This thesis focuses on the geographical (near-slope vs. offshore) and temporal analyses (2011 – 2018) of the Sergestidae assemblage, the crustacean family with the fourth highest total biomass, in the Gulf of Mexico near the location of the Deepwater Horizon oil spill. The abundance and biomass of the assemblage were analyzed to determine if statistical differences were present between the near-slope and offshore environments. In addition, this study analyzed the vertical distributions of sergestid species in the epipelagic, mesopelagic, and bathypelagic zones to determine the extent of the migratory behavior of these species. Lastly, the abundance and biomass in the …
What Lies Beneath: Predicting Seagrass Below-Ground Biomass From Above-Ground Biomass, Environmental Conditions And Seagrass Community Composition, C. J. Collier, L. M. Langlois, Kathryn M. Mcmahon, J. Udy, M. Rasheed, E. Lawrence, A. B. Carter, M. W. Fraser, L. J. Mckenzie
What Lies Beneath: Predicting Seagrass Below-Ground Biomass From Above-Ground Biomass, Environmental Conditions And Seagrass Community Composition, C. J. Collier, L. M. Langlois, Kathryn M. Mcmahon, J. Udy, M. Rasheed, E. Lawrence, A. B. Carter, M. W. Fraser, L. J. Mckenzie
Research outputs 2014 to 2021
© 2020 Seagrass condition, resilience and ecosystem services are affected by the below-ground tissues (BGr) but these are rarely monitored. In this study we compiled historical data across northern Australia to investigate biomass allocation strategies in 13 tropical seagrass species. There was sufficient data to undertake statistical analysis for five species: Cymodocea serrulata, Halophila ovalis, Halodule uninervis, Thalassia hemprichii, and Zostera muelleri. The response of below-ground biomass (BGr) to above-ground biomass (AGr) and other environmental and seagrass community composition predictor variables were assessed using Generalized Linear Models. Environmental data included: region, season, sediment type, water depth, proximity to land-based sources …
Conserving Critical Seagrass Habitat For Dugong. Seagrass Network Monitoring Data Summary, Kathryn M. Mcmahon, Paul Lavery, Nicole Said
Conserving Critical Seagrass Habitat For Dugong. Seagrass Network Monitoring Data Summary, Kathryn M. Mcmahon, Paul Lavery, Nicole Said
Research Datasets
This is the summary dataset of the seagrass monitoring data containing benthic habitat, seagrass meadow characteristics, seed density and environmental variables from three locations in the Pilbara over 3-4 time periods in 2018-2019.
Seaflow Data V1, High-Resolution Abundance, Size And Biomass Of Small Phytoplankton In The North Pacific, François Ribalet, Chris Berthiaume, Annette Hynes, Jarred Swalwell, Michael Carlson, Sophie Clayton, Gwenn Hennon, Camille Poirier, Eric Shimabukuro, Angelicque White, E. Virginia Armhurst
Seaflow Data V1, High-Resolution Abundance, Size And Biomass Of Small Phytoplankton In The North Pacific, François Ribalet, Chris Berthiaume, Annette Hynes, Jarred Swalwell, Michael Carlson, Sophie Clayton, Gwenn Hennon, Camille Poirier, Eric Shimabukuro, Angelicque White, E. Virginia Armhurst
OES Faculty Publications
SeaFlow is an underway flow cytometer that provides continuous shipboard observations of the abundance and optical properties of small phytoplankton (μm in equivalent spherical diameter, ESD). Here we present data sets consisting of SeaFlow-based cell abundance, forward light scatter, and pigment fluorescence of individual cells, as well as derived estimates of ESD and cellular carbon content of picophytoplankton, which includes the cyanobacteria Prochlorococcus, Synechococcus and small-sized Crocosphaera (μm ESD), and picophytoplankton and nanophytoplankton (2–5 μm ESD). Data were collected in surface waters (≈5 m depth) from 27 oceanographic cruises carried out in the Northeast Pacific Ocean between 2010 and 2018. …
Salt Marsh Health And Biomass Responses To A Changing Environment, Gwen Joelle Miller
Salt Marsh Health And Biomass Responses To A Changing Environment, Gwen Joelle Miller
Theses and Dissertations
Coastal salt marshes are important ecosystems not only for their aesthetic beauty but also for their ecosystem services that they provide including improving water quality, providing protection from storm surges and hurricanes, and carbon sequestration. With climate change, including drought, warmer temperatures and sea-level rise, these systems are going to be impacted. Understanding how salt marshes will respond, or already have responded, to climate change will help us be better prepared for the future. By scripting a model to project how marshes may migrate with sea-level rise, I discover that salt marshes within Beaufort and Jasper counties, South Carolina will …
Spatial Distribution Of Benthic Macroinvertebrate Biomass In Puget Sound: Establishing A Baseline, Dany Burgess, Angela Eagleston, Margaret Dutch, Valerie Partridge, Sandra Weakland
Spatial Distribution Of Benthic Macroinvertebrate Biomass In Puget Sound: Establishing A Baseline, Dany Burgess, Angela Eagleston, Margaret Dutch, Valerie Partridge, Sandra Weakland
Salish Sea Ecosystem Conference
Since 1989, Ecology’s Marine Sediment Monitoring Program has collected data to assess the condition of Puget Sound’s sediment-dwelling invertebrate communities (benthos). These long-term data reveal declines in benthos abundance and taxa richness in parts of Puget Sound that do not appear to be correlated with concentrations of chemical contaminants in the sediment. In 2016, a biomass and size classification component was added to the suite of benthic community indices analyzed, as part of a large-scale program redesign intended to shed more light on alternate causes of declining benthos, such as climate change and nutrient enrichment. Benthic invertebrate biomass not only …
Evaluation Of Diet Matrix Uncertainty For The Atlantis Model, Cameron Ainsworth
Evaluation Of Diet Matrix Uncertainty For The Atlantis Model, Cameron Ainsworth
C-IMAGE data
We conducted 1000 Atlantis simulations, using permutated diet matrices created by drawing from a beta distribution that represented uncertainty in predator diet. We also employed a statistical emulator which simulates the production of many more Atlantis runs than could be achieved through numerical simulation. This dataset includes 3 products: statistical emulator output, diet matrices, and Atlantis simulations. These are each contained in their own zip file.
Validating Sidescan Sonar As A Fish Survey Tool Over Artificial Reefs, Michael A. Bollinger, Richard J. Kline
Validating Sidescan Sonar As A Fish Survey Tool Over Artificial Reefs, Michael A. Bollinger, Richard J. Kline
School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations
Visual observation methods via SCUBA are commonly used to survey artificial reef fish, although conditions in the Gulf of Mexico often make surveys difficult or even dangerous for divers. In this study, sidescan sonar was used to quantify water-column fish abundance and was compared to the established visual observation methods on SCUBA over four reef sites. Calibrated intensity values measured from sidescan sonar echo returns were used to estimate fish body length and to calculate scaled biomass (g/m2 reef) from a pooled fish length–weight relationship of commonly observed reef fish in the area. Sidescan sonar methods were equivalent to SCUBA …
Linear And Nonlinear Effects Of Temperature And Precipitation On Ecosystem Properties In Tidal Saline Wetlands, Laura C. Feher, Michael J. Osland, Kereen T. Griffith, James B. Grace, Rebecca J. Howard, Camille L. Stagg, Nicholas M. Enwright, Ken W. Krauss, Christopher A. Gabler, Richard H. Day, Kerrylee Rogers
Linear And Nonlinear Effects Of Temperature And Precipitation On Ecosystem Properties In Tidal Saline Wetlands, Laura C. Feher, Michael J. Osland, Kereen T. Griffith, James B. Grace, Rebecca J. Howard, Camille L. Stagg, Nicholas M. Enwright, Ken W. Krauss, Christopher A. Gabler, Richard H. Day, Kerrylee Rogers
School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations
Climate greatly influences the structure and functioning of tidal saline wetland ecosystems. However, there is a need to better quantify the effects of climatic drivers on ecosystem properties, particularly near climate-sensitive ecological transition zones. Here, we used climate- and literature-derived ecological data from tidal saline wetlands to test hypotheses regarding the influence of climatic drivers (i.e., temperature and precipitation regimes) on the following six ecosystem properties: canopy height, biomass, productivity, decomposition, soil carbon density, and soil carbon accumulation. Our analyses quantify and elucidate linear and nonlinear effects of climatic drivers. We quantified positive linear relationships between temperature and above-ground productivity …
Marine Biomass Analyzer, Kai Jay Staal, Brian Paris, Tyler Cottle
Marine Biomass Analyzer, Kai Jay Staal, Brian Paris, Tyler Cottle
Mechanical Engineering
This report documents the design, fabrication, and testing for a marine biomass analyzer. The goal of the project and constructed system was to determine the validity and efficacy of a process that could flatten benthic macrofauna to a consistent thickness such that a biomass for the collected sample could be accurately determined. The system that was built and tested consists of a drive train that turns a mill subassembly where the organisms are flattened, supply and collection spools that hold the white fabric and clear film used to capture the organisms, a collection zone where the sample is injected, and …
Linear And Nonlinear Effects Of Temperature And Precipitation On Ecosystem Properties In Tidal Saline Wetlands, Laura C. Feher, Michael J. Osland, Kereen T. Griffith, James B. Grace, Rebecca J. Howard, Camille L. Stagg, Nicholas M. Enwright, Ken W. Krauss, Christopher A. Gabler, Richard H. Day, Kerrylee Rogers
Linear And Nonlinear Effects Of Temperature And Precipitation On Ecosystem Properties In Tidal Saline Wetlands, Laura C. Feher, Michael J. Osland, Kereen T. Griffith, James B. Grace, Rebecca J. Howard, Camille L. Stagg, Nicholas M. Enwright, Ken W. Krauss, Christopher A. Gabler, Richard H. Day, Kerrylee Rogers
School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations
Climate greatly influences the structure and functioning of tidal saline wetland ecosystems. However, there is a need to better quantify the effects of climatic drivers on ecosystem properties, particularly near climate‐sensitive ecological transition zones. Here, we used climate‐ and literature‐derived ecological data from tidal saline wetlands to test hypotheses regarding the influence of climatic drivers (i.e., temperature and precipitation regimes) on the following six ecosystem properties: canopy height, biomass, productivity, decomposition, soil carbon density, and soil carbon accumulation. Our analyses quantify and elucidate linear and nonlinear effects of climatic drivers. We quantified positive linear relationships between temperature and above‐ground productivity …
Zooplankton Biomass On The West Florida Shelf, July 2010 – August 2014, Kendra L. Daly
Zooplankton Biomass On The West Florida Shelf, July 2010 – August 2014, Kendra L. Daly
C-IMAGE data
Zooplankton have high temporal and spatial variability. Therefore, they need to be assessed before oil impact and regularly thereafter, to interpret what changes are causally related to oil spills. We surveyed plankton using bongo net tows and the USF SIPPER imaging system to evaluate the variation in plankton abundance on the west Florida shelf and the northern Gulf of Mexico. Seasonal CTD, chlorophyll, nutrient, and zooplankton abundance data from the northeastern Gulf of Mexico and the west Florida shelf. Developed new algorithms for data mining SIPPER (Shadow Imaging Particle Profiler and Evaluation Recorder) camera particle imaging data.
Zooplankton Dry Weight Biomass Data For The Northeastern Gulf Of Mexico And West Florida Shelf: June 2012 – August 2014, Kendra L. Daly
Zooplankton Dry Weight Biomass Data For The Northeastern Gulf Of Mexico And West Florida Shelf: June 2012 – August 2014, Kendra L. Daly
C-IMAGE data
This dataset contains zooplankton dry weight biomass calculated from samples collected during RV Weatherbird II and RV Bellows cruises from June 2012 to August 2014. Zooplankton was collected using towed bongo nets from the northeastern Gulf of Mexico and the west Florida shelf. The contents of the dataset are an assessment of the seasonal and interannual changes in zooplankton biomass after the Deepwater Horizon oil spill.
Connectivity Of Coastal And Oceanic Ecosystems: Pelagic Habitat Use By Juvenile Reef Fishes In The Gulf Of Mexico, Katie Bowen
Connectivity Of Coastal And Oceanic Ecosystems: Pelagic Habitat Use By Juvenile Reef Fishes In The Gulf Of Mexico, Katie Bowen
HCNSO Student Theses and Dissertations
The assemblage structure, abundance, biomass, and vertical distribution of juvenile reef fishes in the offshore pelagic habitat of the northern Gulf of Mexico are described as part of the NOAA-supported Offshore Nekton Sampling and Analysis Program. The results presented here are from a 3-month, continuous sampling series in 2011 in which discrete depth strata from 0 to 1500 m were sampled using a 10-m2 MOCNESS midwater trawl. This is the first study to examine pelagic juvenile reef fish distributions across the entire oceanic northern Gulf of Mexico seaward of the continental shelf break after the Deepwater Horizon Oil Spill. …
Estimating Sustainable Harvests Of Eastern Oysters, Crassostrea Virginica, Thomas M. Soniat, Nathan Cooper, Eric N. Powell, John M. Klinck, Mahdi Abdelguerfi, Shengru Tu, Roger Mann, Patrick D. Banks
Estimating Sustainable Harvests Of Eastern Oysters, Crassostrea Virginica, Thomas M. Soniat, Nathan Cooper, Eric N. Powell, John M. Klinck, Mahdi Abdelguerfi, Shengru Tu, Roger Mann, Patrick D. Banks
CCPO Publications
Sustainability of a fishery is traditionally and typically considered achieved if the exploited population does not decline in numbers or biomass over time as a result of fishing relative to biological reference point goals. Oysters, however, exhibit atypical population dynamics compared with many other commercial species. The population dynamics often display extreme natural interannual variation in numbers and biomass, and oysters create their own habitat--the reef itself. With the worldwide decline of oyster reef habitat and the oyster fisheries dependent thereon, the maintenance of shell has received renewed attention as essential to population sustainability. We apply a shell budget model …
Drift Algae, An Invasive Snail And Elevated Temperature Reduce Ecological Performance Of A Warm-Temperate Seagrass, Through Additive Effects, H Hoffle, Thomas Wernberg, Mads Thomsen, M Holmer
Drift Algae, An Invasive Snail And Elevated Temperature Reduce Ecological Performance Of A Warm-Temperate Seagrass, Through Additive Effects, H Hoffle, Thomas Wernberg, Mads Thomsen, M Holmer
Research outputs 2012
Seagrasses are under pressure from multiple concurrent threats, including rising temperatures, invasive species and nutrient-driven algal accumulations. We quantified the abundance of drift algae and the invasive snail Batillaria australis in 3 Halophila ovalis seagrass beds in the Swan River Estuary (Perth, Western Australia), and tested in an aquarium experiment for interactive effects of temperature (21 vs. 27°C), cover of drift algae Chaetomorpha linum (0 vs. 1.4 kg fresh wt m -2) and presence (0 vs. 120 snails m -2) of B. australis on the ecological performance of H. ovalis. The survey showed that drift algae varied considerably between sites …
Global Human Footprint On The Linkage Between Biodiversity And Ecosystem Functioning In Reef Fishes, Camilo Mora, Octavio Aburto-Oropeza, Arturo Ayala Bocos, Paula M. Ayotte, Stuart Banks, Andrew G. Bauman, Maria Beger, Sandra Bessudo, David J. Booth, Eran Brokovich, Andrew Brooks, Pascale Chabanet, Josh Eli Cinner, Jorge Cortes, Juan J. Cruz-Motta, Amilcar Cupul Magaña, Edward E. Demartini, Graham J. Edgar, David A. Feary, Sebastian C. A. Ferse, Alan M. Friedlander, Kevin J. Gaston, Charlotte Gough, Nicholas A. J. Graham, Alison Green, Hector M. Guzman, Marah Hardt, Michel Kulbicki, Yves Letourneur, Andres López Pérez, Michel Loreau, Yossi Loya, Camilo Martinez, Ismael Mascareñas-Osorio, Tau Morove, Marc-Olivier Nadon, Yohei Nakamura, Gustavo Paredes, Nicholas V.C. Polunin, Morgan S. Pratchett, Hector Reyes Bonilla, Fernando Rivera, Enric Sala, Stuart A. Sandin, German Soler, Rick Stuart-Smith, Emmanuel Tessier, Derek P. Tittensor, Mark Tupper, Paolo Usseglio, Laurent Vigliola, Laurent Wantiez, Ivor D. Williams, Shaun K. Wilson, Fernando A. Zapata
Global Human Footprint On The Linkage Between Biodiversity And Ecosystem Functioning In Reef Fishes, Camilo Mora, Octavio Aburto-Oropeza, Arturo Ayala Bocos, Paula M. Ayotte, Stuart Banks, Andrew G. Bauman, Maria Beger, Sandra Bessudo, David J. Booth, Eran Brokovich, Andrew Brooks, Pascale Chabanet, Josh Eli Cinner, Jorge Cortes, Juan J. Cruz-Motta, Amilcar Cupul Magaña, Edward E. Demartini, Graham J. Edgar, David A. Feary, Sebastian C. A. Ferse, Alan M. Friedlander, Kevin J. Gaston, Charlotte Gough, Nicholas A. J. Graham, Alison Green, Hector M. Guzman, Marah Hardt, Michel Kulbicki, Yves Letourneur, Andres López Pérez, Michel Loreau, Yossi Loya, Camilo Martinez, Ismael Mascareñas-Osorio, Tau Morove, Marc-Olivier Nadon, Yohei Nakamura, Gustavo Paredes, Nicholas V.C. Polunin, Morgan S. Pratchett, Hector Reyes Bonilla, Fernando Rivera, Enric Sala, Stuart A. Sandin, German Soler, Rick Stuart-Smith, Emmanuel Tessier, Derek P. Tittensor, Mark Tupper, Paolo Usseglio, Laurent Vigliola, Laurent Wantiez, Ivor D. Williams, Shaun K. Wilson, Fernando A. Zapata
Marine & Environmental Sciences Faculty Articles
Difficulties in scaling up theoretical and experimental results have raised controversy over the consequences of biodiversity loss for the functioning of natural ecosystems. Using a global survey of reef fish assemblages, we show that in contrast to previous theoretical and experimental studies, ecosystem functioning (as measured by standing biomass) scales in a non-saturating manner with biodiversity (as measured by species and functional richness) in this ecosystem. Our field study also shows a significant and negative interaction between human population density and biodiversity on ecosystem functioning (i.e., for the same human density there were larger reductions in standing biomass at more …
Benthic Ecology From Space: Optics And Net Primary Production In Seagrass And Benthic Algae Across The Great Bahama Bank, Heidi M. Dierssen, Richard C. Zimmerman, Lisa A. Drake, David J. Burdige
Benthic Ecology From Space: Optics And Net Primary Production In Seagrass And Benthic Algae Across The Great Bahama Bank, Heidi M. Dierssen, Richard C. Zimmerman, Lisa A. Drake, David J. Burdige
OES Faculty Publications
Development of repeatable and quantitative tools are necessary for determining the abundance and distribution of different types of benthic habitats, detecting changes to these ecosystems, and determining their role in the global carbon cycle. Here we used ocean color remote sensing techniques to map different major groups of primary producers and estimate net primary productivity (NPP) across Great Bahama Bank (GBB). Field investigations on the northern portion of the GBB in 2004 revealed 3 dominant types of benthic primary producers: seagrass, benthic macroalgae, and microalgae attached to sediment. Laboratory measurements of NPP ranged from barely net autotrophic for grapestone sediment …
Simulations Of Phytoplankton Species And Carbon Production In The Equatorial Pacific Ocean 1. Model Configuration And Ecosystem Dynamics, Baris Salihoglu, Eileen E. Hofmann
Simulations Of Phytoplankton Species And Carbon Production In The Equatorial Pacific Ocean 1. Model Configuration And Ecosystem Dynamics, Baris Salihoglu, Eileen E. Hofmann
OES Faculty Publications
The primary objective of this research is to investigate phytoplankton community response to variations in physical forcing and biological processes in the Cold Tongue region of the equatorial Pacific Ocean at 0N, 140W. This research objective was addressed using a one-dimensional multicomponent lower trophic level ecosystem model that includes detailed algal physiology, such as spectrally-dependent photosynthetic processes and iron limitation on algal growth. The ecosystem model is forced by a one-year (1992) time series of spectrally-dependent light, temperature, and water column mixing obtained from a Tropical Atmosphere-Ocean (TAO) Array mooring. Autotrophic growth is represented by five algal groups, which have …
Comparison Of Plankton Catch By Three Light-Trap Designs In The Northern Gulf Of Mexico, Richard F. Shaw, Joseph S. Cope, G. Joan Holt, Et Al
Comparison Of Plankton Catch By Three Light-Trap Designs In The Northern Gulf Of Mexico, Richard F. Shaw, Joseph S. Cope, G. Joan Holt, Et Al
VIMS Articles
The ichthyoplankton catch and zooplankton biomass estimates of three light-trap designs-cylindrical, quatrefoil, and rectangular-were compared over three consecutive nights at an offshore petroleum platform in the northern Gulf of Mexico. The quatrefoil light trap had higher fish and zooplankton abundance estimates than the other two designs. Categorical analysis of the two abundant fish taxa, Opisthonema oglinum and Anchoa spp., indicated that catch by the quatrefoil and rectangular traps was similar, capturing more larvae than juveniles and more O. oglinum than Anchoa spp. relative to cylindrical trap catch. Across all fish species, the quatrefoil captured a greater percentage of larvae. Other …
A Unique Seasonal Pattern In Phytoplankton Biomass In Low-Latitude Waters In The South China Sea, Chun-Mao Tseng, George T. F. Wong, I.-I. Lin, C.-R. Wu, K.-K. Liu
A Unique Seasonal Pattern In Phytoplankton Biomass In Low-Latitude Waters In The South China Sea, Chun-Mao Tseng, George T. F. Wong, I.-I. Lin, C.-R. Wu, K.-K. Liu
OES Faculty Publications
A distinctive seasonal pattern in phytoplankton biomass was observed at the South East Asian Time series Study (SEATS) station (18°N, 116°E) in the northern South China Sea (SCS). Surface chlorophyll-a, depth integrated chlorophyll-a and primary production were elevated to 0.3 mg/m3, ~35 mg/m2 and 300 mg-C/m2/d, respectively, in the winter but stayed low, at 0.1 mg/m3, ~15 mg/m2 and 110 mg-C/m2/d as commonly found in other low latitude waters, in the rest of the year. Concomitantly, soluble reactive phosphate and nitrate+nitrite in the mixed layer also became …
Bio-Optical Properties Of The Labrador Sea, Glenn F. Cota, W. Glen Harrison, Trevor Platt, Shubha Sathyendranath, Venetia Stuart
Bio-Optical Properties Of The Labrador Sea, Glenn F. Cota, W. Glen Harrison, Trevor Platt, Shubha Sathyendranath, Venetia Stuart
CCPO Publications
Three cruises were conducted during fall and spring in the Labrador Sea to investigate the effects of bio-optical properties on satellite retrievals of phytoplankton chlorophyll in this important high-latitude ecosystem. Taxon-specific and regional differences were found. Diatoms had similar to 1.5 lower chlorophyll-specific absorption but significantly higher reflectance ratios than prymnesiophytes. Particulate absorption at 443 nm for total, phytoplankton, and "detrital'' fractions was related to chlorophyll, but values were lower than reported for lower latitudes. Decreased particulate absorption is attributed primarily to pigment packaging, while low backscattering to scattering ratios result from a lower relative abundance of bacteria and picophytoplankton …
Estuarine Relationships Between Zooplankton Community Structure And Trophic Gradients, Gyung Soo Park, Harold G. Marshall
Estuarine Relationships Between Zooplankton Community Structure And Trophic Gradients, Gyung Soo Park, Harold G. Marshall
Biological Sciences Faculty Publications
Zooplankton and water quality parameters were investigated at eight mesohaline stations in the lower Chesapeake Bay and Elizabeth River from January through December 1994 to identify the changes of zooplankton community structure with increased eutrophication. The total micro- and mesozooplankton biomass decreased with the increase of eutrophication. However, the relative proportion of microzooplankton increased with increased eutrophication. Within highly eutrophied waters, the small oligotrichs (m) and rotifers dominated the total zooplankton biomass (as carbon). However, tintinnids, copepod nauplii and mesozooplankton significantly decreased with the increase of eutrophication. These patterns were consistent throughout the seasons and had significant relationships statistically. These …
Observations Of The Phytoplankton Standing Crop At The Shelf Margin Of The Mid Atlantic Bight, Bruce B. Wagoner, Harold G. Marshall
Observations Of The Phytoplankton Standing Crop At The Shelf Margin Of The Mid Atlantic Bight, Bruce B. Wagoner, Harold G. Marshall
Biological Sciences Faculty Publications
A comparison of the total percentage cell abundance and cell biovolume relationships of major phytoplankton categories was made between two station sets across the shelf margin. Diatom values for abundance and biovolume were greater at oceanic stations compared to the outer shelf stations, with dinoflagellates having the reverse pattern. The composite contributions to biovolume and abundance in the standing crop from other phytoplankton categories were greater over the outer shelf than beyond the shelf margin. The major source of biovolume (biomass) from the outer shelf and these oceanic stations came from the diatoms and dinoflagellates, with an average mean of …
Elevated Levels Of Microbial Activity In The Coral Surface Microlayer, John H. Paul, Mary F. Deflaun, Wade H. Jeffrey
Elevated Levels Of Microbial Activity In The Coral Surface Microlayer, John H. Paul, Mary F. Deflaun, Wade H. Jeffrey
Marine Science Faculty Publications
No abstract provided.