Benthic and epibenthic macroinvertebrates of the Hudson River

Ristich, S. S.; Crandall, Mindy S.; Fortier, Julien

doi:10.1016/0302-3524(77)90021-4

Cited by 26 publications

(4 citation statements)

References 9 publications

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“…Previous work on the distribution and population density of benthic and epibenthic macroinvertebrates in the Hudson River has indicated that (1) salinity is the most important factor controlling species range, and (2) the number of species and organisms was highest in the more saline (5 to 30 %o) reaches of the estuary, such as the inner-harbor area of New York City, and lowest in the lower salinity (0-5 %o) and fresh water zones [Ristich et al, 1977]. In this study we have measured the vertical distribution of fallout and reactor-released radionuclides in sediment cores collected throughout the salinity range of the Hudson estuary and compared these mea-relatively minor, even though these areas may have much higher rates of sediment mixing as a a result of a greater number of organisms, gas-bubble formation, or current and human activities.…”

Section: Introductionmentioning

confidence: 99%

Sediment mixing and accumulation rate effects on radionuclide depth profiles in Hudson estuary sediments

Olsen¹,

Simpson²,

Peng³

et al. 1981

J. Geophys. Res.

101

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Measured anthropogenic radionuclide profiles in sediment cores from the Hudson River estuary were compared with profiles computed by using known input histories of radionuclides to the estuary and mixing coefficients which decreased exponentially with depth in the sediment. Observed 134Cs sediment depth profiles were used in the mixing rate computation because reactor releases were the only significant source for this nuclide, whereas the inputs of 137Cs and 239,240Pu to the estuary were complicated by runoff or erosion in upstream areas, in addition to direct fallout from precipitation. Our estimates for the rates of surface sediment mixing in the low salinity reach of the estuary range from 0.25 to 1 cm2/yr, or less. In some areas of the harbor adjacent to New York City, where fine‐particle accumulation rates are generally >3 cm/yr, and often as high as 10 to 20 cm/yr, sediment mixing rates as high as 10 cm2/yr would have little effect on radionuclide peak distributions. Consequently, anthropogenic radionuclide maximum activities in subsurface sediments of the Hudson appear to be useful as time‐stratigraphic reference levels, which can be correlated with periods of maximum radionuclide inputs for estimating rates and patterns of sediment accumulation.

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Section: Introductionmentioning

confidence: 99%

Sediment mixing and accumulation rate effects on radionuclide depth profiles in Hudson estuary sediments

Olsen¹,

Simpson²,

Peng³

et al. 1981

J. Geophys. Res.

101

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“…Juvenile Atlantic Sturgeon overwinter in lower reaches of the Hudson River, before migrating to primary foraging habitat as spring temperatures warm (Bain, 1994, 1997; Bain et al, 2000). These habitats include soft‐bottom sediments in deeper waters of Haverstraw Bay, which warm during spring, occur within the salt‐freshwater interface, and hold an abundance of preferred forage (e.g., Amphipoda, Isopoda, and Polychaeta; Brosse et al, 2000; Guilbard et al, 2007; Haley et al, 1996; Moser & Ross, 1995; Ristich et al, 1977). Habitat conditions coupled with migratory behavior may bring a flux of fish into or through a target sample area in spring that leads to increased catch rates (Sweka et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Juvenile Atlantic Sturgeon prefer mesohaline water (salinity 3–15 ppt) and concentrate near or downstream of the salt front (Gilbert, 1989; Haley et al, 1996; Moser & Ross, 1995), so salt front movement affects availability to the survey. Salinity is a driving force in estuarine environments that influences the benthic foraging environment (Cloern et al, 2017; Guilbard et al, 2007; Ristich et al, 1977) and optimal metabolic rates for juvenile Atlantic Sturgeon (Allen et al, 2014; Niklitscheck & Secor, 2009). Because of these interactions, salinity alone may not fully account for sturgeon distribution and abundance, whereas a distance to salt front metric may integrate across imperfectly correlated metrics (Hatin et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Salinity was likely important, but may affect more than individual fish, including chemical and biotic benthic environments. Therefore, proximity to saline water may be an important predictor of habitat use that integrates several salinity‐related variables not measured within this study, such as the benthic macroinvertebrate community (Ristich et al, 1977). To explore the relationship between salinity and distance to salt front, we plotted distance to salt front versus log(salinity) and fit a log‐linear model with additive error (

ε_{i}

\log ()(, {salinity}_{i}) ~ β goodbreak\times {dtsf}_{i} goodbreak+ ε_{i}

where

dtsf

represents the distance to salt front metric.…”

Section: Methodsmentioning

confidence: 99%

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Evaluating population trends of juvenile Atlantic Sturgeon at low abundance in a dynamic estuarine environment (Hudson River, New York)

DuFour

Qian

2023

Fisheries Management Eco

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Evaluating population trends in dynamic estuarine environments can be challenging, especially when survey data include a high percentage of zero observations. In fishery‐independent surveys, zeros that come from reduced susceptibility to sample gears and reduced availability of the population to the survey impact survey catchability and negatively bias relative abundance indices. A zero‐inflated negative binomial model was used to standardize a juvenile Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus) relative abundance index (Hudson River, New York) that included a high proportion (42%) of zero observations and intra‐ and interannually variable covariates. Reduced susceptibility was related to low water temperature, with the percentage of zeroes increasing rapidly below 7°C. Availability was influenced by temperature and distance to salt front, as catch rates increased with temperature and peaked in mesohaline waters ~27 km downstream of the predicted salt front. An alternative index suggested significant population growth (r = 0.15; p‐value = 0.007) occurred from 2004 to 2015. The zero‐inflated model helped better understand Hudson River juvenile Atlantic Sturgeon ecology and relative trends in abundance, to better inform future management and monitoring decisions along the Atlantic Coast.

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The benthic macroinvertebrate community of the upper reaches of an Australian estuary that undergoes marked seasonal changes in hydrology

Kanandjembo

Platell

Potter

2001

Hydrological Processes

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Abstract:Benthic macroinvertebrates were collected from the substrata of nearshore, shallow waters (depths <1 m) and offshore, deeper waters (depths 2Ð5-5 m) of three regions in the saline lower reaches of the tributary rivers that comprise the upper Swan Estuary in each season between winter 1995 and autumn 1997. Freshwater discharge in the two tributary rivers varied markedly during both years and consequently salinities in the upper estuary ranged from <1‰ in winter to >30‰ in autumn. The most abundant species, the galeommatid bivalve Arthritica semen, contributed >25% to the total numbers of macroinvertebrates in both shallow and deeper waters. The continuous reproduction, rapid growth, short life cycle and tolerance to a wide range of salinities, that characterize this species, represent ideal adaptations for life in a seasonally very variable environment. The overall number of species and density of benthic macroinvertebrates were typically greater in shallow than deeper waters. Species composition also differed significantly between water depths. The nereidid polychaete Ceratonereis aequisetis and mytilid bivalve Xenostrobus securis, which feed on plant material, were relatively far more abundant in shallow than deeper waters, whereas the reverse was true for the spionid polychaete Prionospio cirrifera and sabellid polychaete Desdemona ornata, which feed on the detrital material that settles out in deep waters. Heavy freshwater discharge in winter 1996 was accompanied by very marked changes in the richness, density and composition of species in shallow waters, but not in those of deeper waters where scouring would have been less pronounced. The species compositions in both the shallow and deeper waters of each region usually differed significantly among the seasons of each year and between the corresponding seasons in the different years. Region within the estuary had little or no influence on the species richness, density and faunal composition of benthic macroinvertebrates, even though the regions were located in two different tributary rivers. The above results demonstrate that, within each region, certain species were particularly successful in the first year, while others were more abundant in the second year, which in turn suggests that the benthic macroinvertebrate fauna of each region is responding to the same fine-scale differences between environmental conditions in the two years.

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Benthic and epibenthic macroinvertebrates of the Hudson River

Cited by 26 publications

References 9 publications

Sediment mixing and accumulation rate effects on radionuclide depth profiles in Hudson estuary sediments

Sediment mixing and accumulation rate effects on radionuclide depth profiles in Hudson estuary sediments

Evaluating population trends of juvenile Atlantic Sturgeon at low abundance in a dynamic estuarine environment (Hudson River, New York)

The benthic macroinvertebrate community of the upper reaches of an Australian estuary that undergoes marked seasonal changes in hydrology

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