The East River tidal strait, New York City, New York, a high-nutrient, low-chlorophyll coastal system

Li, Yaqin; Meseck, Shannon L.; Dixon, Mark S.; Wikfors, Gary H.

doi:10.1007/s40071-018-0189-2

Cited by 9 publications

(5 citation statements)

References 43 publications

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“…Similarly, temperature is in-phase with water level at semidiurnal timescales, while salinity is out of phase. These findings are consistent with measurements reported by Li et al (2018) from the upper East River, which showed that temperature and DOb are positively correlated with water level, and salinity is negatively correlated with water level.…”

Section: Bottom Observationssupporting

confidence: 93%

“…These findings suggest that surface biological production was higher in 2021 despite lower daily solar irradiance, which may suggest higher nutrient concentrations in 2021. Li et al (2018) also found evidence of diel-cycling DO in the upper East River, however the amplitude of diel fluctuations was an order of magnitude smaller than fluctuations shown here at EXRK likely due to high turbidity in the upper East River which limits production.…”

Section: Surface Observationscontrasting

confidence: 46%

“…Although the net velocity flux is toward the direction of the East River (Blumberg & Pritchard, 1997;Gay et al, 2004;Fribance et al, 2013), tidally driven exchange with the Hudson River estuary via the East River decreases salinity in western LIS compared to 6 eastern LIS. Input of nutrient rich waters from the East River likely supports summertime phytoplankton production and seasonally observed bottom hypoxia in the western narrows (Li et al, 2018). Residual circulation in western LIS may increase residence times and retention of high-nutrient waters (Vieira, 2000), leading to worsened hypoxia.…”

Section: Study Areamentioning

confidence: 99%

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High-frequency Dissolved Oxygen Dynamics in an Urban Estuary, the Long Island Sound

Duvall,

Hagy,

Ammerman

et al. 2023

Estuaries and Coasts

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The seasonal occurrence of benthic hypoxia in western Long Island Sound (LIS) has been documented for decades by water quality cruise surveys and fixed mooring buoys. While previous studies have focused on factors modulating bottom dissolved oxygen (DO) at subtidal timescales, here we analyze continuous timeseries data from a moored buoy during summers 2021 and 2022 to examine factors controlling high-frequency fluctuations in surface and bottom DO at diurnal and semidiurnal timescales. Fluctuations in surface DO at diurnal timescales are associated with biological production, while fluctuations in bottom DO near semidiurnal timescales are associated with horizontal advection of DO by tides from the upper East River into western LIS. Results from timeseries analysis are supported by weekly cruise surveys that resolve horizontal and vertical DO gradients in the western narrows. However, inferences regarding the duration of hypoxia during a given summer vary across datasets in part because weekly survey data do not resolve dominant intraseasonal timescales of variability. While prior studies have illustrated the importance of nutrient loading, stratification, and wind in controlling the development of hypoxia, the results presented here demonstrate the role of tidal advection in modulating hypoxia in far western LIS. Despite stronger stratification in 2021, the duration of hypoxia was 11.1 days shorter compared to 2022 in part due to greater advection of DO by tidal currents that intermittently ventilated bottom waters near the buoy. While improvements in water quality have been observed in other areas of LIS, increasing hypoxic area in the western narrows highlights the spatially variable response of DO to nutrient load reductions. Future analysis of hypoxia in LIS should focus on leveraging high-frequency information contained in continuous datasets to improve estimates of hypoxia based on less temporally resolved water quality surveys.

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Section: Bottom Observationssupporting

confidence: 93%

Section: Surface Observationscontrasting

confidence: 46%

Section: Study Areamentioning

confidence: 99%

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High-frequency Dissolved Oxygen Dynamics in an Urban Estuary, the Long Island Sound

Duvall,

Hagy,

Ammerman

et al. 2023

Estuaries and Coasts

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“…The location was unusual in that nutrients remained primarily in the dissolved form over the summer months, and chlorophyll remained low throughout the time series, ranging from 0.95–4.58 with mean 1.67 (Figure S3). Experiments reported in Li et al indicated that growth of local phytoplankton assemblages was light-limited due to persistent high concentrations of PIM in the Bronx River Estuary. Kim et al report rapid onset of light limitation below 0.5 m depth at the same location, with rapid growth of the cultivated macroalgal species Gracilaria tikvahiae only in the uppermost portion of the water column.…”

Section: Resultsmentioning

confidence: 99%

Cultivation of the Ribbed Mussel (Geukensia demissa) for Nutrient Bioextraction in an Urban Estuary

Galimany

Wikfors

Dixon

et al. 2017

Environ. Sci. Technol.

Self Cite

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Shellfish aquaculture is gaining acceptance as a tool to reduce nutrient over enrichment in coastal and estuarine ecosystems through the feeding activity of the animals and assimilation of filtered particles in shellfish tissues. This ecosystem service, provided by the ribbed mussel (Geukensia demissa), was studied in animals suspended from a commercial mussel raft in the urban Bronx River Estuary, NY, in waters closed to shellfish harvest due to bacterial contamination. Naturally occurring populations of ribbed mussels were observed to be healthy and resilient in this highly urbanized environment. Furthermore, mussels grown suspended in the water column contained substantially lower concentrations of heavy metals and organic contaminants in their tissues than blue mussels (Mytilus edulis) collected at a nearby benthic site. Spat collection efforts from shore and within the water column were unsuccessful; this was identified as a key bottleneck to future large-scale implementation. Filtration experiments indicated that a fully stocked G. demissa raft would clear an average 1.2 × 10 L of Bronx River Estuary water daily, removing 160 kg of particulate matter from the water column, of which 12 kg would be absorbed into mussel digestive systems. At harvest, 62.6 kg of nitrogen would be sequestered in mussel tissue and shell. These values compare favorably to other resource management recovery methods targeting agricultural and stormwater nitrogen sources.

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“…Interestingly, polymer type had the least significant effect on community composition at the SH site, which had the lowest salinity (26 PSU) and is historically characterised by high nutrient loadings (Gobler et al, 2008). Meanwhile, MAR site samples exhibited the most significant effect of polymer type on community composition despite having high nutrient loads and high salinity (Li et al, 2018; Taillie et al, 2020). In general, polymer‐specific influence on plastisphere community composition across previous studies is inconsistent.…”

Section: Discussionmentioning

confidence: 99%

Microbes and microplastics: Community shifts along an urban coastal contaminant gradient

Garrison,

Pachiadaki,

Soliman

et al. 2023

Environmental Microbiology

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Plastic substrates introduced to the environment during the Anthropocene have introduced new pathways for microbial selection and dispersal. Some plastic‐colonising microorganisms have adapted phenotypes for plastic degradation (selection), while the spatial transport (dispersal) potential of plastic colonisers remains controlled by polymer‐specific density, hydrography and currents. Plastic‐degrading enzyme abundances have recently been correlated with concentrations of plastic debris in open ocean environments, making it critical to better understand colonisation of hydrocarbon degraders with plastic degradation potential in urbanised watersheds where plastic pollution often originates. We found that microbial colonisation by reputed hydrocarbon degraders on microplastics (MPs) correlated with a spatial contaminant gradient (New York City/Long Island waterways), polymer types, temporal scales, microbial domains and putative cell activity (DNA vs. RNA). Hydrocarbon‐degrading taxa enriched on polyethylene and polyvinyl chloride substrates relative to other polymers and were more commonly recovered in samples proximal to New York City. These differences in MP colonisation could indicate phenotypic adaptation processes resulting from increased exposure to urban plastic runoff as well as differences in carbon bioavailability across polymer types. Shifts in MP community potential across urban coastal contaminant gradients and polymer types improve our understanding of environmental plastic discharge impacts toward biogeochemical cycling across the global ocean.

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The East River tidal strait, New York City, New York, a high-nutrient, low-chlorophyll coastal system

Cited by 9 publications

References 43 publications

High-frequency Dissolved Oxygen Dynamics in an Urban Estuary, the Long Island Sound

High-frequency Dissolved Oxygen Dynamics in an Urban Estuary, the Long Island Sound

Cultivation of the Ribbed Mussel (Geukensia demissa) for Nutrient Bioextraction in an Urban Estuary

Microbes and microplastics: Community shifts along an urban coastal contaminant gradient

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