Development of a model to assess coastal ecosystem health using oysters as the indicator species

Ahn, Jeong Eun; Ronan, Anne Dudek

doi:10.1016/j.ecss.2019.106528

Cited by 15 publications

(4 citation statements)

References 30 publications

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“…Despite significant advances, Indigenous knowledge and archaeology are often neglected in conservation and ecology, including in studies of shellfish like oysters (Ostreidae). Oysters are important components and indicators of resilient coastal ecosystems 6 , but they also carry cultural and economic significance for people worldwide. Their ecological and cultural roles became well-established when post-glacial sea level rise created and stabilized estuaries around the world 7 .…”

Section: Introductionmentioning

confidence: 99%

Indigenous oyster fisheries persisted for millennia and should inform future management

et al. 2022

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Historical ecology has revolutionized our understanding of fisheries and cultural landscapes, demonstrating the value of historical data for evaluating the past, present, and future of Earth’s ecosystems. Despite several important studies, Indigenous fisheries generally receive less attention from scholars and managers than the 17th–20th century capitalist commercial fisheries that decimated many keystone species, including oysters. We investigate Indigenous oyster harvest through time in North America and Australia, placing these data in the context of sea level histories and historical catch records. Indigenous oyster fisheries were pervasive across space and through time, persisting for 5000–10,000 years or more. Oysters were likely managed and sometimes “farmed,” and are woven into broader cultural, ritual, and social traditions. Effective stewardship of oyster reefs and other marine fisheries around the world must center Indigenous histories and include Indigenous community members to co-develop more inclusive, just, and successful strategies for restoration, harvest, and management.

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Section: Introductionmentioning

confidence: 99%

Indigenous oyster fisheries persisted for millennia and should inform future management

et al. 2022

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“…There are inherent positives and negatives associated with field and modeling studies, as some questions cannot be answered through field or modeling work alone. However, when used together, field and modeling studies can bolster one method's finding while introducing new findings and questions that may not have been previously considered or possible to identify (Ahn & Ronan 2020; Skogen et al 2021).…”

Section: Discussionmentioning

confidence: 99%

An agent‐based model accurately predicts larval dispersal and identifies restoration and monitoring priorities for eastern oyster (Crassostrea virginica) in a Southwest Florida estuary

Dye

Jose

Richard

et al. 2021

Restoration Ecology

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An agent-based modeling (ABM) framework was developed to support oyster reef restoration efforts in the Caloosahatchee River Estuary located within the encompassing Charlotte Harbor estuarine system, Southwest Florida. The modeling approach is novel for this shallow estuary which experiences heavily managed freshwater inflow known to be an ecological stressor to the estuary's oysters. The aims of the study were to (1) determine the ABM's accuracy in simulating larval dispersal patterns when compared with measured in situ larval settlement data; (2) establish connectivity patterns between various oyster reefs within the estuary; and (3) discover larval transport pathways within the Charlotte Harbor estuarine system. Key characteristics of the ABM, in particular the agents serving as simulated larvae, include settlement behavior and salinity tolerance and associated mortality. The ABM accurately recreated larval dispersal patterns during the peak spawning season, providing fundamental insight into the importance of protecting the furthest upstream oyster reef as a sustained larval source to the downstream reefs. Thus, supporting the effectiveness of using field measurements for the validation of ABMs and subsequently using ABM simulations to bolster future field studies. Ultimately, this study provides an effective, generally applicable, approach to model larval ecology for restoration purposes.

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“…In addition, and compared to the culture of finfish and other crustaceans, the culture of C. tulipa is likely cheaper because it does not involve external feed inputs; this is because the animal, like other bivalves, feeds on naturally occurring phytoplankton (Dumbauld et al, 2009). The culture of species, on a large scale, may even improve water quality in coastal areas as the feeding behaviour of the animal increases the burial of dissolved nutrients and carbon in bottom sediments (Ahn & Ronan, 2020; Frankié, 2019; Grabowski & Peterson, 2007).…”

Section: Introductionmentioning

confidence: 99%

Isolation and evaluation of local microalgal isolates as feed for larval rearing of Crassostrea tulipa towards optimisation of mangrove oyster seed production in Ghana

Krampah,

Mensah,

Acheampong

et al. 2024

Aquaculture Fish & Fisheries

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This study explored the potential of three local microalgal isolates as feed for oyster larvae in laboratory‐rearing experiments, towards the optimisation of seed production of Crassostrea tulipa to support its large‐scale farming along the West African coast. Three species of local microalgae—Rhodomonas sp., Nannochloropsis sp. and Pseudanabaena sp.—were isolated from waters off the coast of Ghana, West Africa, following a serial dilution technique. The growth performance of the isolates was assessed in the laboratory through daily estimation of cell density until the stationary phase was observed. Characterisation of the microalgal isolates was carried out by estimation of their biovolume, carbon content and energy content. Biovolumes of the microalgae were calculated from the estimated equivalent spherical diameters using proposed geometric shapes and formulae. Carbon weight and carbon energy content were subsequently calculated using derived conversions. The three microalgal isolates showed potential for large‐scale cultivation in the laboratory with marked differences in daily increases in cell densities. Nannochloropsis sp. and Rhodomonas sp. recorded the highest and the lowest peak densities of 2.4 × 105 and 1.5 × 105 cell mL−1, respectively, from an initial inoculating cell density of 1.05 × 105 cell mL−1. The estimated mean biovolumes of Rhodomonas sp., Nannochloropsis sp. and Pseudanabaena sp. were 238.9, 8.182 and 42.42 µm3, respectively, and the corresponding derived carbon energy contents were 1.7 × 10−6, 7.13 × 10−8 and 1.05 × 10−7 J, respectively. Results from a laboratory rearing experiment indicated that the individual microalgal isolates supported the growth and survival of oyster larvae at different scales, but a mixed diet of the three promoted superior growth and survival of C. tulipa larvae. The three local microalgal isolates‐ Rhodomonas sp., Nannochloropsis sp., and Pseudanabaena sp.‐ were well adapted to laboratory culture conditions, and the observed differences in growth and survival of the oyster larvae fed on these algal diets could be due to the differences in diet properties and biochemical compositions of the different species. A combination of the three algal diets, however, provided complementaery nutrients for the optimal growth and survival of C. tulipa larvae. The outcome of this study shows that local microalgal isolates have the potential to support hatchery rearing of C. tulipa, which is essential for the development of commercial mangrove oyster aquaculture in West Africa.

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Development of a model to assess coastal ecosystem health using oysters as the indicator species

Cited by 15 publications

References 30 publications

Indigenous oyster fisheries persisted for millennia and should inform future management

Indigenous oyster fisheries persisted for millennia and should inform future management

An agent‐based model accurately predicts larval dispersal and identifies restoration and monitoring priorities for eastern oyster (Crassostrea virginica) in a Southwest Florida estuary

Isolation and evaluation of local microalgal isolates as feed for larval rearing of Crassostrea tulipa towards optimisation of mangrove oyster seed production in Ghana

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