Use of settlement patterns and geochemical tagging to test population connectivity of eastern oysters Crassostrea virginica

Gancel, Haley N.; Carmichael, Ruth H.; Du, Jiabi; Park, Kyeong

doi:10.3354/meps13796

Cited by 3 publications

(1 citation statement)

References 78 publications

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“…Small networks of oyster spawning areas that extend from local, within‐region scales would enable increased larval supply to oyster reefs as well as enhanced connectivity of subregions within the basin. Biophysical models can be used to guide such activities (Gancel et al, 2021; Kim et al, 2013) by providing areas that are most likely to serve as stepping stones within and between subregions as well as among embayments in the few cases where such connection is possible.…”

Section: Discussionmentioning

confidence: 99%

Establishing connectivity patterns of eastern oysters (Crassostrea virginica) on regional oceanographic scales

Powers

Roman²,

Meixner

et al. 2023

Ecosphere

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Localized depletion of marine and estuarine populations often results from large-scale natural and anthropogenic disturbances (e.g., hurricanes, oil spills) as well as overharvest of fisheries resources. Understanding how such localized depletions may affect populations at larger regional scales requires knowledge of connectivity among local populations within the larger regional landscape or metapopulation. Efforts to restore populations following such decreases require similar knowledge. During the 2010 Deepwater Horizon oil spill, dramatic declines of oysters occurred throughout estuaries west and east of the Mississippi River. We examined trajectories of particles, which were parameterized to mimic oyster larvae, using the ADvanced CIRCulation (ADCIRC; https://adcirc.org) model to evaluate potential connectivity within and among embayments from Western Louisiana to Alabama. Patterns of larval settlement, which we defined as the intersection of a larval particle with known or expected oyster habitat at any point 13-21 days post-release, reflected much greater local contributions, with 50%-90% of settled particles originating within the same subdivision of embayments. Exchange among subdivision was much less (0%-40%) and settlement originating from outside the embayment of release was trivial under most scenarios (0%-14%). Connectivity between adjacent basins was greatest for larvae released in the southern portions of the embayment, whereas connectivity among nonadjacent basins was not predicted under the scenarios modeled. Because most local populations are relatively isolated on ecological timescales, areas suffering from extensive local depletion are likely to require extensive time to recover due to the lack of larval subsidy from the overall regional population. Restoration would require building stepping-stone populations or reefs within and among basin to restore a high degree of connectivity.

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Section: Discussionmentioning

confidence: 99%

Establishing connectivity patterns of eastern oysters (Crassostrea virginica) on regional oceanographic scales

Powers

Roman²,

Meixner

et al. 2023

Ecosphere

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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

La Peyre,

Sable,

Marshall

et al. 2024

Mar Coast Fish

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ObjectiveIncreasing 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 recent frameworks outlining best practices for model development and application for restoration, conservation, and management.MethodsWe identify priority model questions, outline a conceptual ecological model (CEM) to guide numerical model development, and use this framework to identify uncertainties and research needs.ResultThe CEM uses a nested design, identifying explicit vital rates, processes, attributes, and outcomes for the species (oysters), population, and metapopulation (i.e., network of populations) levels in response to drivers of species, population, and metapopulation changes and changing environmental factors. Most management actions related to oyster restoration and harvest affect population attributes directly, but many coastal management actions and changes (i.e., climate change and coastal and water resource engineering) impact environmental factors that alter vital rates and attributes of oysters, populations, and metapopulations.ConclusionInvestment in studies targeting individual oyster‐ and population‐level multi‐stressor responses (filtration, respiration, growth, and reproduction) and improving hydrodynamic and environmental models targeting drivers that influence metapopulation vital rates and attributes (i.e., connectivity and substrate persistence) would contribute to reducing uncertainties. Development of numerical models covering the entire oyster life cycle and connectivity of populations using hydrodynamic models of current and predicted conditions to provide key abiotic and biotic factors influencing larval movement, recruitment, and on‐reef oyster vital rates would assist in balancing the goals of conservation, restoration, and fisheries management of this foundational estuarine species.

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Are We Falling Short on Restoring Oysters at a Regional Scale?

Peyre

Marshall

Buie

et al. 2022

Environmental Management

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Use of settlement patterns and geochemical tagging to test population connectivity of eastern oysters Crassostrea virginica

Cited by 3 publications

References 78 publications

Establishing connectivity patterns of eastern oysters (Crassostrea virginica) on regional oceanographic scales

Establishing connectivity patterns of eastern oysters (Crassostrea virginica) on regional oceanographic scales

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

Are We Falling Short on Restoring Oysters at a Regional Scale?

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