Temporal Dynamics of Eastern Oyster Larval Abundance in Great Bay Estuary, New Hampshire

Stasse, Alyssa; Cheng, Matthew L. H.; Meyer, Kelsey; Bumbera, Nicole; Volkom, Kaitlin Van; Laferriere, Alix; Dijkstra, Jennifer A.; Brown, Bonnie L.

doi:10.2983/035.040.0303

Cited by 3 publications

(4 citation statements)

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“…Across the 179 GBE water column samples analyzed, the range of numbers of MP detected was 0.08-4,528 MP particles m -3 , with a mean of 467 ± 811 (median 115) MP particles m -3 . Significant variation was observed across GBE sites (χ 2 = 15.2, 6 df, P = 0.002), despite the fact that the estuary is uncharacteristically well-mixed [44,64] [Figure 2]. In GBE, where the same sampling procedure was used every year, there was significant variation in MP counts across the 5 years (P < 0.0001) [Figure 2].…”

Section: Resultsmentioning

confidence: 99%

“…GBE is surrounded by rural, agricultural, and forested areas and is fed by seven tributaries that typically are low-discharge providing limited freshwater [44] . GBE is unique from other estuaries in that it is well-mixed due to strong currents that introduce oceanic water into the Bay, but flushing rates and residence times are slower/longer than HSE and GME.…”

Section: Discussionmentioning

confidence: 99%

“…The coastal GBE is surrounded by rural, agricultural, and forested areas and is fed by 7 tributaries that are typically low-discharge systems, providing limited freshwater [44] . In contrast, HSE and GME are barrier marsh systems that were formed behind the multi-state barrier beach system, serving as the primary coastal landform that protects homes, businesses, infrastructure, and estuarine resources of the marsh complex.…”

Section: Sampled Regionsmentioning

confidence: 99%

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A baseline for microplastic occurrence in three New England estuaries

Brown,

Moore,

Mogensen

et al. 2023

Water Emerg Contam Nanoplastics

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Although microplastics (MP) have been documented in estuarine habitats, limited published data exist for New Hampshire and northern Massachusetts hampering meaningful, regional comparison with other geographies. Here we synthesize previously unpublished data from several independent baseline studies spanning three estuarine systems including Great Bay Estuary (GBE), Hampton-Seabrook Estuary (HSE), and Great Marsh Estuary (GME) to compare geographic data for MP to other published regional studies. Data include water column in GBE (n = 179 from 7 sites), surface waters and salt marsh sediment cores from HSE (n = 72 water samples from 12 sites and n = 77 sediment cores from 8 sites), and surface waters from GME (n = 42 water samples at 10 sites). Samples were analyzed for MP characteristics initially via either automated confocal microscopy or light microscopy, allowing initial estimation of the number and size distribution of putative MP. Particles from representative samples were analyzed using laser direct infrared spectrometry (LDIR) to determine elemental analysis. MP were found in > 98% of samples collected including surface waters, water column, and marine sediments. Counts ranged from 1 to 144,000 MP particles m-3 and mean MP differed significantly among regions, sites within regions, and across years. In the GBE water column, MP tended to peak during June-August in 4 of the 5 years studied. Most MP were roughly circular and ~50 μm in diameter. LDIR confirmed that many types of plastics are in these estuarine waters and also revealed that despite the digestion processes, biogenic materials often remained, predominantly chitin, rubber, wood, and coal. These data allow us to address the realistic levels of risk that estuarine MP pose in NH and northern MA estuaries and can be used to populate existing hydrodynamic models that will predict the tributary sources, movements, and fate of MP within these aquatic habitats.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Sampled Regionsmentioning

confidence: 99%

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A baseline for microplastic occurrence in three New England estuaries

Brown,

Moore,

Mogensen

et al. 2023

Water Emerg Contam Nanoplastics

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“…The historic decrease in the eastern oyster adult population in GBE may limit the potential for recruitment from native reefs [13]. Although the rough densities and locations of oysters in GBE are known [18], questions have arisen relating to the number of breeders, gene ow, and the potential for recruitment to both natural and arti cial oyster reefs [19]. Because restoration has been challenging in GBE, detailed information on the population structure of eastern oysters in this estuary is needed to enhance restoration efforts.…”

Section: Introductionmentioning

confidence: 99%

Population genomics of eastern oysters, Crassostrea virginica, in a well-mixed estuarine system: advancement and implications for restoration strategies

Stasse,

Brown

2024

Preprint

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Eastern oysters, Crassostrea virginica, are historically a keystone species in many of the estuaries in which they reside, providing critical ecosystem services. Because oyster populations have been on the decline, restoration initiatives currently are underway in many estuarine systems including Great Bay Estuary (GBE), New Hampshire. Results of prior studies of eastern oyster population genomics cannot be applied directly to GBE, as it is a well-mixed estuarine system that is relatively contained, and the sources of recruits are split among cultivated and native. This study aimed to identify the population genomic structure of eastern oysters in GBE, to facilitate determination of effective population size and estimation of genetic differentiation among subpopulations. Results showed moderate genomic differentiation among native, cultivated, and restoration C. virginica subpopulations in the Bay. A small number of breeders (Ne=163 – 276) was found in all subpopulations except the Lamprey River site (Ne=995). This research provides a contemporary snapshot of eastern oyster subpopulation structure at the genomic level in GBE that will facilitate restoration and enhanced management.

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Haplosporidium nelsoni and Perkinsus marinus occurrence in waters of Great Bay Estuary, New Hampshire

Stasse,

Lee,

Brown

2024

Dis. Aquat. Org.

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In Great Bay Estuary, New Hampshire, USA, Haplosporidium nelsoni and Perkinsus marinus are 2 active pathogens of the eastern oyster Crassostrea virginica (Gmelin), that cause MSX (multinucleated sphere with unknown affinity ‘X’) and dermo mortalities, respectively. Whereas studies have quantified infection intensities in oyster populations and determined whether these parasites exist in certain planktonic organisms, no studies thus far have examined both infectious agents simultaneously in water associated with areas that do and do not have oyster populations. As in other estuaries, both organisms are present in estuarine waters throughout the Bay, especially during June through November, when oysters are most active. Waters associated with oyster habitats had higher, more variable DNA concentrations from these pathogenic organisms than waters at a non-oyster site. This finding allows for enhanced understanding of disease-causing organisms in New England estuaries, where oyster restoration is a priority.

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Temporal Dynamics of Eastern Oyster Larval Abundance in Great Bay Estuary, New Hampshire

Cited by 3 publications

References 50 publications

A baseline for microplastic occurrence in three New England estuaries

A baseline for microplastic occurrence in three New England estuaries

Population genomics of eastern oysters, Crassostrea virginica, in a well-mixed estuarine system: advancement and implications for restoration strategies

Haplosporidium nelsoni and Perkinsus marinus occurrence in waters of Great Bay Estuary, New Hampshire

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