Megan La Peyre, PhD (Former Employee)
Science and Products
A Case Study Assessing the Cumulative Effects of Deepwater Horizon Restoration Projects on Barrier Island/Barrier Shoreline Ecosystem Resilience in the North-central Gulf
USGS and partners will assess the potential cumulative effects of restoration projects on the resiliency of barrier islands and barrier shorelines in the north-central Gulf.
Developing an Oyster Metapopulation Model for Louisiana Estuaries to Assess Reef Connectivity, Recruitment, and Sustainability in support of Louisiana Monitoring and Adaptive Management Strategy
USGS and collaborators are co-producing integrated oceanographic and ecological modeling to support decision making in Louisiana estuaries.
Cumulative effects assessment of restoration programs: a framework to assess achievement of regional and programmatic goals
Increasing global investments focused on conservation and restoration of natural resources aim to address challenges presented by climate change and biodiversity loss.
A Roadmap for Developing Resilient Coastal Shellfish Populations: Using Spatial and Process-Based Modelling for Restoration Under Current and Predicted Future Water Quality Conditions
Estuaries support valuable recreation, fisheries, and aquaculture and are dependent on healthy and vibrant ecosystems. Along the northern Gulf of America, estuaries sustain local economies through their high productivity. They also receive over 50% of the United States watershed discharge, and water quality within these estuaries is impacted by local management actions. Within these...
Model Improvements for Louisiana’s 2023 Coastal Master Plan
The Louisiana Coastal Protection and Restoration Authority’s Coastal Master Plan is a blueprint for responding to environmental changes. As part of the agency’s continued engagement, USGS supports model developments and improvements for the 2023 Coastal Master Plan.
Long-term change on barrier islands and barrier shorelines from extreme storms and restoration along the north central Gulf of Mexico coast Long-term change on barrier islands and barrier shorelines from extreme storms and restoration along the north central Gulf of Mexico coast
These data utilize existing land cover products and elevation information to provide information on changes on barrier islands and barrier shorelines along the north central Gulf of Mexico coast. Specifically, this data release includes information on changes in subaerial land, habitat types, and high-tide flooding for barrier islands and barrier shorelines along the north central Gulf...
Information supporting a cumulative effects assessment of restoration in barrier island and shoreline systems of the north central Gulf of Mexico Information supporting a cumulative effects assessment of restoration in barrier island and shoreline systems of the north central Gulf of Mexico
Information was gathered to support a cumulative effects assessment of restoration in barrier island and shoreline systems of the north central Gulf of Mexico. Information includes: 1) results from two literature searches to help guide the development of a conceptual model of a barrier island and shoreline system and identify drivers and stressors important to that system, and 2) an...
Eastern oyster Dynamic Energy Budget model outputs under current (2014-2020) and projected (2041-2050) temperature and salinity conditions in Texas and Louisiana estuaries and along northern Gulf of Mexico coast Eastern oyster Dynamic Energy Budget model outputs under current (2014-2020) and projected (2041-2050) temperature and salinity conditions in Texas and Louisiana estuaries and along northern Gulf of Mexico coast
Compilation of all outputs from the modeling study presented in Lavaud et al. (2023; IP-156006). In this study a Dynamic Energy Budget (DEB) model for the eastern oyster, Crassostrea virginica, was run under different scenarios of current (2014–2020) and future (2041–2050) temperature and salinity conditions across six key Texas and Louisiana estuaries to derive an aquaculture index...
Bio-engineered oyster reef monitoring, Eloi Bay, Louisiana, 2017-2019 Bio-engineered oyster reef monitoring, Eloi Bay, Louisiana, 2017-2019
This dataset includes annual encrusting organism (oyster, mussel, barnacle) counts and density (ind m-2), and oyster shell height (mm) data for five bio-engineered reef designs: OysterbreakTM (OB), Wave Attenuating Device (WAD), Reef Ball (rows of two, RFB2; rows of three, RFB3), ReefBLK? (RBL), and ShoreJAX (JAX). Data were collected during winter months (i.e., December-January) in 2017...
Seagrass habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island Seagrass habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island
A barrier island seagrass habitat suitability index (HSI) model was developed for the Alabama barrier island restoration assessment at Dauphin Island. Shoal grass (Halodule wrightii) was selected as the representative species for seagrass community near Dauphin Island waters since H. wrightii is the dominant species (>62%) of seagrass communities in this area due to its rapid growth and...
Oyster habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island Oyster habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island
A spatially explicit oyster habitat suitability index (HSI) model was developed for the Alabama barrier island restoration assessment at Dauphin Island. Based on previous oyster habitat suitability studies, seven water quality variables were selected and their relationships with habitat suitability were developed and incorporated into the oyster HSI model for Dauphin Island restoration...
Seed biomass from shallow coastal water areas along a salinity gradient in Barataria Bay, Louisiana (2015) Seed biomass from shallow coastal water areas along a salinity gradient in Barataria Bay, Louisiana (2015)
This dataset provides bi-monthly data on seed biomass collected in shallow water habitats across the fresh to saline gradient at coastal sites in Barataria Bay, Louisiana.
Seed biomass from shallow coastal water areas from Texas through Alabama, 2013-2015 Seed biomass from shallow coastal water areas from Texas through Alabama, 2013-2015
This projects primary goal was to provide data on biomass of potential seed resources located within shallow water coastal areas within fresh to saline coastal waters of the northern Gulf of Mexico. The data set provides biomass of seeds, by species or lowest practical taxon from 2013, 2014 and 2015 across 384 randomly selected sites located in shallow water coastal areas. The data were...
Sediment carbon, submerged aquatic vegetation and environmental variables in deltaic southeast Louisiana (2015-2016) Sediment carbon, submerged aquatic vegetation and environmental variables in deltaic southeast Louisiana (2015-2016)
These present data on sediment carbon from soil cores taken from within submerged aquatic vegetation beds from fresh to saline coastal locations in southeast Louisiana. Water quality, site location, vegetation biomass and species composition are recorded.
Data for Gulf Coast Vulnerability Assessment Data for Gulf Coast Vulnerability Assessment
This USGS Data Release represents geospatial and tabular data for the Gulf Coast Vulnerability Assessment Project. The data release was produced in compliance with the new 'open data' requirements as way to make the scientific products associated with USGS research efforts and publications available to the public. The dataset consists of 2 separate items: 1. Vulnerability assessment data...
Submerged aquatic vegetation and environmental data for coastal areas from Texas through Alabama, 2013-2015 Submerged aquatic vegetation and environmental data for coastal areas from Texas through Alabama, 2013-2015
This projects primary goal was to provide data on occurrence and abundance of SAV resources within the fresh to saline coastal waters of the northern Gulf of Mexico, and to relate these findings to key environmental variables. The data set provides the collected data from 2013, 2014 and 2015 on site location, discrete water quality, aquatic vegetation cover and biomass by species. The...
Filter Total Items: 94
Multiscale framework for assessing land cover change on barrier islands from extreme storms and restoration Multiscale framework for assessing land cover change on barrier islands from extreme storms and restoration
Often found along the estuarine-marine interface, barrier islands and mainland coastal zones are shaped by tides, currents, extreme storms, and relative sea-level rise. These systems provide ecosystem services such as storm surge and wave attenuation, erosion protection to inland areas, habitat for fish and wildlife, recreation, and tourism. Given the importance of these ecosystems...
Authors
Nicholas Enwright, P. Dalyander, Casey Stuht, Minoo Han, Margaret Palmsten, Theresa Davenport, Christopher Kingwill, Gregory Steyer, Megan La Peyre
Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana
Background Estuarine biodiversity plays a vital role in supporting ecosystem functions yet remains threatened by climate change and anthropogenic activity. Tracking and identifying estuarine biodiversity trends helps management ensure long-term provisions of human and environmental benefits by contributing to the estimation of habitat loss and the monitoring of restoration and...
Authors
Finella Campanino, Stephanie Archer, Jillian Tuptiza, Cassandra Glaspie, Megan La Peyre
Vulnerability of gulf ribbed mussels to marsh surface maximum temperatures Vulnerability of gulf ribbed mussels to marsh surface maximum temperatures
Gulf ribbed mussels (Geukensia granosissima) act as ecosystem engineers and reside within the marsh platform of saltmarshes across the northern Gulf of Mexico. With climate models projecting increasing temperatures, and more frequent and extreme heat events, these mussels face increasing temperature-related risks. Marsh surface and subsurface (5-cm depth) temperature was measured...
Authors
Skylar Liner, Brian Roberts, Nicholas Coxe, Romain Lavaud, Jerome La Peyre, Megan La Peyre
Multiple dimensions define thresholds for population resilience of the eastern oyster, Crassostrea virginica Multiple dimensions define thresholds for population resilience of the eastern oyster, Crassostrea virginica
A species' distribution depends on its tolerance to environmental conditions. These conditions are defined by a minimum, maximum, and optimal ranges of single and combined factors. Forays into environmental conditions outside the minimum or maximum tolerance of a species (i.e., thresholds) are predicted to have large effects on a species' population and may help predict population...
Authors
Megan K. La Peyre, H. Wang, Shaye Sable, Wei Wu, Bin Li, Devin Comba, Carlos Perez, Melanie Bates, Lauren Swam
Cumulative effects assessment of restoration programs: A framework to assess achievement of regional and programmatic goals Cumulative effects assessment of restoration programs: A framework to assess achievement of regional and programmatic goals
Increasing global investments focused on conservation and restoration of natural resources aim to address challenges presented by climate change and biodiversity loss. Many restoration and conservation program assessments examine individual actions, assuming additive effects only, failing to acknowledge or capture potential synergistic or antagonistic effects across a region or program...
Authors
T. Davenport, D. Comba, P. Dalyander, Nicholas Enwright, Margaret Palmsten, Gregory Steyer, Megan La Peyre
The use of conceptual ecological models to identify critical data and uncertainties to support numerical modeling: The northern Gulf of Mexico eastern oyster Crassostrea virginica example The use of conceptual ecological models to identify critical data and uncertainties to support numerical modeling: The northern Gulf of Mexico eastern oyster Crassostrea virginica example
Objective Increasing reliance on numerical simulation models to help inform management and restoration choices benefits from careful consideration of critical early steps in model development. Along the northern coast of the Gulf of Mexico, the eastern oyster Crassostrea virginica fulfills important ecological and economic roles. Using the eastern oyster as an example, we draw on several...
Authors
Megan K. La Peyre, Shaye Sable, Danielle A. Marshall, Elise Irwin, Chad W. Hanson
In-situ valve opening response of eastern oysters to estuarine conditions In-situ valve opening response of eastern oysters to estuarine conditions
High-frequency recordings of valve opening behavior (VOB) in bivalves are often used to detect changes in environmental conditions. However, generally a single variable such as temperature or the presence of toxicants in the water is the focus. A description of routine VOB under non-stressful conditions is also important for interpreting responses to environmental changes. Here we...
Authors
Romain Lavaud, Stephanie Archer, Megan K. La Peyre, Finella Campanino, Sandra Casas, Jerome F. La Peyre
Rates of osmoconformation in triploid eastern oysters, and comparison to their diploid half-siblings Rates of osmoconformation in triploid eastern oysters, and comparison to their diploid half-siblings
Triploid eastern oysters (Crassostrea virginica) suffer greater mortalities than diploids in the U.S. Gulf of Mexico estuaries when extreme low salinities ( 5) and elevated temperatures (≥ 28 °C) coincide. To investigate potential causes, changes in plasma osmolality, hemolymph pH, valve opening and mortality in diploid and triploid oyster half-siblings were compared during a step-down...
Authors
Sandra M. Casas, Devin Comba, Megan K. La Peyre, Scott Rikard, Jerome F. La Peyre
Hypoxia and anoxia tolerance in diploid and triploid eastern oysters at high temperature Hypoxia and anoxia tolerance in diploid and triploid eastern oysters at high temperature
Increasing reliance on the use of triploid oysters to support aquaculture production relies on their generally superior growth rate and meat quality over that of diploid oysters. Reports of elevated triploid mortality have generated questions about potential trade-offs between growth and tolerance to environmental stressors. These questions are particularly relevant as climate change...
Authors
Nicholas Coxe, Genesis Mize, Sandra M. Casas, Megan K. La Peyre, Romain Lavaud, Brian Callam, Scott Rikard, Jerome La Peyre
DNA virome composition of two sympatric wild felids, bobcat (Lynx rufus) and puma (Puma concolor) in Sonora, Mexico DNA virome composition of two sympatric wild felids, bobcat (Lynx rufus) and puma (Puma concolor) in Sonora, Mexico
With viruses often having devastating effects on wildlife population fitness and wild mammals serving as pathogen reservoirs for potentially zoonotic diseases, determining the viral diversity present in wild mammals is both a conservation and One Health priority. Additionally, transmission from more abundant hosts could increase the extinction risk of threatened sympatric species. We...
Authors
Natalie Payne, Leigh Combrink, Simona Kraberger, Rafaela Fontenele, Kara Schmidlin, Ivonne Cassaigne, Megan K. La Peyre, Arvind Varsani, Koenraad Van Doorslaer
Differential hypoxia tolerance of eastern oysters from the northern Gulf of Mexico at elevated temperature Differential hypoxia tolerance of eastern oysters from the northern Gulf of Mexico at elevated temperature
Increasing prevalence of hypoxia in shallow waters of U.S. Gulf of Mexico (GoM) estuaries can pose a serious threat to eastern oysters (Crassostrea virginica). Their tolerance to hypoxia, however, is not well characterized, especially at elevated temperatures (>30 °C) typical of GoM estuaries in summer. Moreover, it is unknown whether differences in hypoxia tolerance exist between GoM...
Authors
Nicholas Coxe, Sandra Casas, Danielle A. Marshall, Megan K. La Peyre, Morgan Kelly, Jerome La Peyre
Are we falling short on restoring oysters at a regional scale? Are we falling short on restoring oysters at a regional scale?
Across coastal areas of the northern Gulf of Mexico, the Deepwater Horizon oil spill resulted in significant ecological injury, and over 8 billion USD directed to restoration activities. Oyster restoration projects were implemented with regional goals of restoring oyster abundance, spawning stock, and population resilience. Measuring regional or large-scale ecosystem restoration outcomes
Authors
Megan K. La Peyre, Danielle Marshall, Sarah Buie, Ann Hijuelos, Gregory Steyer
Science and Products
A Case Study Assessing the Cumulative Effects of Deepwater Horizon Restoration Projects on Barrier Island/Barrier Shoreline Ecosystem Resilience in the North-central Gulf
USGS and partners will assess the potential cumulative effects of restoration projects on the resiliency of barrier islands and barrier shorelines in the north-central Gulf.
Developing an Oyster Metapopulation Model for Louisiana Estuaries to Assess Reef Connectivity, Recruitment, and Sustainability in support of Louisiana Monitoring and Adaptive Management Strategy
USGS and collaborators are co-producing integrated oceanographic and ecological modeling to support decision making in Louisiana estuaries.
Cumulative effects assessment of restoration programs: a framework to assess achievement of regional and programmatic goals
Increasing global investments focused on conservation and restoration of natural resources aim to address challenges presented by climate change and biodiversity loss.
A Roadmap for Developing Resilient Coastal Shellfish Populations: Using Spatial and Process-Based Modelling for Restoration Under Current and Predicted Future Water Quality Conditions
Estuaries support valuable recreation, fisheries, and aquaculture and are dependent on healthy and vibrant ecosystems. Along the northern Gulf of America, estuaries sustain local economies through their high productivity. They also receive over 50% of the United States watershed discharge, and water quality within these estuaries is impacted by local management actions. Within these...
Model Improvements for Louisiana’s 2023 Coastal Master Plan
The Louisiana Coastal Protection and Restoration Authority’s Coastal Master Plan is a blueprint for responding to environmental changes. As part of the agency’s continued engagement, USGS supports model developments and improvements for the 2023 Coastal Master Plan.
Long-term change on barrier islands and barrier shorelines from extreme storms and restoration along the north central Gulf of Mexico coast Long-term change on barrier islands and barrier shorelines from extreme storms and restoration along the north central Gulf of Mexico coast
These data utilize existing land cover products and elevation information to provide information on changes on barrier islands and barrier shorelines along the north central Gulf of Mexico coast. Specifically, this data release includes information on changes in subaerial land, habitat types, and high-tide flooding for barrier islands and barrier shorelines along the north central Gulf...
Information supporting a cumulative effects assessment of restoration in barrier island and shoreline systems of the north central Gulf of Mexico Information supporting a cumulative effects assessment of restoration in barrier island and shoreline systems of the north central Gulf of Mexico
Information was gathered to support a cumulative effects assessment of restoration in barrier island and shoreline systems of the north central Gulf of Mexico. Information includes: 1) results from two literature searches to help guide the development of a conceptual model of a barrier island and shoreline system and identify drivers and stressors important to that system, and 2) an...
Eastern oyster Dynamic Energy Budget model outputs under current (2014-2020) and projected (2041-2050) temperature and salinity conditions in Texas and Louisiana estuaries and along northern Gulf of Mexico coast Eastern oyster Dynamic Energy Budget model outputs under current (2014-2020) and projected (2041-2050) temperature and salinity conditions in Texas and Louisiana estuaries and along northern Gulf of Mexico coast
Compilation of all outputs from the modeling study presented in Lavaud et al. (2023; IP-156006). In this study a Dynamic Energy Budget (DEB) model for the eastern oyster, Crassostrea virginica, was run under different scenarios of current (2014–2020) and future (2041–2050) temperature and salinity conditions across six key Texas and Louisiana estuaries to derive an aquaculture index...
Bio-engineered oyster reef monitoring, Eloi Bay, Louisiana, 2017-2019 Bio-engineered oyster reef monitoring, Eloi Bay, Louisiana, 2017-2019
This dataset includes annual encrusting organism (oyster, mussel, barnacle) counts and density (ind m-2), and oyster shell height (mm) data for five bio-engineered reef designs: OysterbreakTM (OB), Wave Attenuating Device (WAD), Reef Ball (rows of two, RFB2; rows of three, RFB3), ReefBLK? (RBL), and ShoreJAX (JAX). Data were collected during winter months (i.e., December-January) in 2017...
Seagrass habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island Seagrass habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island
A barrier island seagrass habitat suitability index (HSI) model was developed for the Alabama barrier island restoration assessment at Dauphin Island. Shoal grass (Halodule wrightii) was selected as the representative species for seagrass community near Dauphin Island waters since H. wrightii is the dominant species (>62%) of seagrass communities in this area due to its rapid growth and...
Oyster habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island Oyster habitat suitability modeling for the Alabama Barrier Island restoration assessment at Dauphin Island
A spatially explicit oyster habitat suitability index (HSI) model was developed for the Alabama barrier island restoration assessment at Dauphin Island. Based on previous oyster habitat suitability studies, seven water quality variables were selected and their relationships with habitat suitability were developed and incorporated into the oyster HSI model for Dauphin Island restoration...
Seed biomass from shallow coastal water areas along a salinity gradient in Barataria Bay, Louisiana (2015) Seed biomass from shallow coastal water areas along a salinity gradient in Barataria Bay, Louisiana (2015)
This dataset provides bi-monthly data on seed biomass collected in shallow water habitats across the fresh to saline gradient at coastal sites in Barataria Bay, Louisiana.
Seed biomass from shallow coastal water areas from Texas through Alabama, 2013-2015 Seed biomass from shallow coastal water areas from Texas through Alabama, 2013-2015
This projects primary goal was to provide data on biomass of potential seed resources located within shallow water coastal areas within fresh to saline coastal waters of the northern Gulf of Mexico. The data set provides biomass of seeds, by species or lowest practical taxon from 2013, 2014 and 2015 across 384 randomly selected sites located in shallow water coastal areas. The data were...
Sediment carbon, submerged aquatic vegetation and environmental variables in deltaic southeast Louisiana (2015-2016) Sediment carbon, submerged aquatic vegetation and environmental variables in deltaic southeast Louisiana (2015-2016)
These present data on sediment carbon from soil cores taken from within submerged aquatic vegetation beds from fresh to saline coastal locations in southeast Louisiana. Water quality, site location, vegetation biomass and species composition are recorded.
Data for Gulf Coast Vulnerability Assessment Data for Gulf Coast Vulnerability Assessment
This USGS Data Release represents geospatial and tabular data for the Gulf Coast Vulnerability Assessment Project. The data release was produced in compliance with the new 'open data' requirements as way to make the scientific products associated with USGS research efforts and publications available to the public. The dataset consists of 2 separate items: 1. Vulnerability assessment data...
Submerged aquatic vegetation and environmental data for coastal areas from Texas through Alabama, 2013-2015 Submerged aquatic vegetation and environmental data for coastal areas from Texas through Alabama, 2013-2015
This projects primary goal was to provide data on occurrence and abundance of SAV resources within the fresh to saline coastal waters of the northern Gulf of Mexico, and to relate these findings to key environmental variables. The data set provides the collected data from 2013, 2014 and 2015 on site location, discrete water quality, aquatic vegetation cover and biomass by species. The...
Filter Total Items: 94
Multiscale framework for assessing land cover change on barrier islands from extreme storms and restoration Multiscale framework for assessing land cover change on barrier islands from extreme storms and restoration
Often found along the estuarine-marine interface, barrier islands and mainland coastal zones are shaped by tides, currents, extreme storms, and relative sea-level rise. These systems provide ecosystem services such as storm surge and wave attenuation, erosion protection to inland areas, habitat for fish and wildlife, recreation, and tourism. Given the importance of these ecosystems...
Authors
Nicholas Enwright, P. Dalyander, Casey Stuht, Minoo Han, Margaret Palmsten, Theresa Davenport, Christopher Kingwill, Gregory Steyer, Megan La Peyre
Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana
Background Estuarine biodiversity plays a vital role in supporting ecosystem functions yet remains threatened by climate change and anthropogenic activity. Tracking and identifying estuarine biodiversity trends helps management ensure long-term provisions of human and environmental benefits by contributing to the estimation of habitat loss and the monitoring of restoration and...
Authors
Finella Campanino, Stephanie Archer, Jillian Tuptiza, Cassandra Glaspie, Megan La Peyre
Vulnerability of gulf ribbed mussels to marsh surface maximum temperatures Vulnerability of gulf ribbed mussels to marsh surface maximum temperatures
Gulf ribbed mussels (Geukensia granosissima) act as ecosystem engineers and reside within the marsh platform of saltmarshes across the northern Gulf of Mexico. With climate models projecting increasing temperatures, and more frequent and extreme heat events, these mussels face increasing temperature-related risks. Marsh surface and subsurface (5-cm depth) temperature was measured...
Authors
Skylar Liner, Brian Roberts, Nicholas Coxe, Romain Lavaud, Jerome La Peyre, Megan La Peyre
Multiple dimensions define thresholds for population resilience of the eastern oyster, Crassostrea virginica Multiple dimensions define thresholds for population resilience of the eastern oyster, Crassostrea virginica
A species' distribution depends on its tolerance to environmental conditions. These conditions are defined by a minimum, maximum, and optimal ranges of single and combined factors. Forays into environmental conditions outside the minimum or maximum tolerance of a species (i.e., thresholds) are predicted to have large effects on a species' population and may help predict population...
Authors
Megan K. La Peyre, H. Wang, Shaye Sable, Wei Wu, Bin Li, Devin Comba, Carlos Perez, Melanie Bates, Lauren Swam
Cumulative effects assessment of restoration programs: A framework to assess achievement of regional and programmatic goals Cumulative effects assessment of restoration programs: A framework to assess achievement of regional and programmatic goals
Increasing global investments focused on conservation and restoration of natural resources aim to address challenges presented by climate change and biodiversity loss. Many restoration and conservation program assessments examine individual actions, assuming additive effects only, failing to acknowledge or capture potential synergistic or antagonistic effects across a region or program...
Authors
T. Davenport, D. Comba, P. Dalyander, Nicholas Enwright, Margaret Palmsten, Gregory Steyer, Megan La Peyre
The use of conceptual ecological models to identify critical data and uncertainties to support numerical modeling: The northern Gulf of Mexico eastern oyster Crassostrea virginica example The use of conceptual ecological models to identify critical data and uncertainties to support numerical modeling: The northern Gulf of Mexico eastern oyster Crassostrea virginica example
Objective Increasing reliance on numerical simulation models to help inform management and restoration choices benefits from careful consideration of critical early steps in model development. Along the northern coast of the Gulf of Mexico, the eastern oyster Crassostrea virginica fulfills important ecological and economic roles. Using the eastern oyster as an example, we draw on several...
Authors
Megan K. La Peyre, Shaye Sable, Danielle A. Marshall, Elise Irwin, Chad W. Hanson
In-situ valve opening response of eastern oysters to estuarine conditions In-situ valve opening response of eastern oysters to estuarine conditions
High-frequency recordings of valve opening behavior (VOB) in bivalves are often used to detect changes in environmental conditions. However, generally a single variable such as temperature or the presence of toxicants in the water is the focus. A description of routine VOB under non-stressful conditions is also important for interpreting responses to environmental changes. Here we...
Authors
Romain Lavaud, Stephanie Archer, Megan K. La Peyre, Finella Campanino, Sandra Casas, Jerome F. La Peyre
Rates of osmoconformation in triploid eastern oysters, and comparison to their diploid half-siblings Rates of osmoconformation in triploid eastern oysters, and comparison to their diploid half-siblings
Triploid eastern oysters (Crassostrea virginica) suffer greater mortalities than diploids in the U.S. Gulf of Mexico estuaries when extreme low salinities ( 5) and elevated temperatures (≥ 28 °C) coincide. To investigate potential causes, changes in plasma osmolality, hemolymph pH, valve opening and mortality in diploid and triploid oyster half-siblings were compared during a step-down...
Authors
Sandra M. Casas, Devin Comba, Megan K. La Peyre, Scott Rikard, Jerome F. La Peyre
Hypoxia and anoxia tolerance in diploid and triploid eastern oysters at high temperature Hypoxia and anoxia tolerance in diploid and triploid eastern oysters at high temperature
Increasing reliance on the use of triploid oysters to support aquaculture production relies on their generally superior growth rate and meat quality over that of diploid oysters. Reports of elevated triploid mortality have generated questions about potential trade-offs between growth and tolerance to environmental stressors. These questions are particularly relevant as climate change...
Authors
Nicholas Coxe, Genesis Mize, Sandra M. Casas, Megan K. La Peyre, Romain Lavaud, Brian Callam, Scott Rikard, Jerome La Peyre
DNA virome composition of two sympatric wild felids, bobcat (Lynx rufus) and puma (Puma concolor) in Sonora, Mexico DNA virome composition of two sympatric wild felids, bobcat (Lynx rufus) and puma (Puma concolor) in Sonora, Mexico
With viruses often having devastating effects on wildlife population fitness and wild mammals serving as pathogen reservoirs for potentially zoonotic diseases, determining the viral diversity present in wild mammals is both a conservation and One Health priority. Additionally, transmission from more abundant hosts could increase the extinction risk of threatened sympatric species. We...
Authors
Natalie Payne, Leigh Combrink, Simona Kraberger, Rafaela Fontenele, Kara Schmidlin, Ivonne Cassaigne, Megan K. La Peyre, Arvind Varsani, Koenraad Van Doorslaer
Differential hypoxia tolerance of eastern oysters from the northern Gulf of Mexico at elevated temperature Differential hypoxia tolerance of eastern oysters from the northern Gulf of Mexico at elevated temperature
Increasing prevalence of hypoxia in shallow waters of U.S. Gulf of Mexico (GoM) estuaries can pose a serious threat to eastern oysters (Crassostrea virginica). Their tolerance to hypoxia, however, is not well characterized, especially at elevated temperatures (>30 °C) typical of GoM estuaries in summer. Moreover, it is unknown whether differences in hypoxia tolerance exist between GoM...
Authors
Nicholas Coxe, Sandra Casas, Danielle A. Marshall, Megan K. La Peyre, Morgan Kelly, Jerome La Peyre
Are we falling short on restoring oysters at a regional scale? Are we falling short on restoring oysters at a regional scale?
Across coastal areas of the northern Gulf of Mexico, the Deepwater Horizon oil spill resulted in significant ecological injury, and over 8 billion USD directed to restoration activities. Oyster restoration projects were implemented with regional goals of restoring oyster abundance, spawning stock, and population resilience. Measuring regional or large-scale ecosystem restoration outcomes
Authors
Megan K. La Peyre, Danielle Marshall, Sarah Buie, Ann Hijuelos, Gregory Steyer