Showing papers in "Estuarine and Coastal Marine Science in 1980"

TL;DR: Calculations based on the measured rates of reduction indicate that 15–20% of the total arsenic is reduced by phytoplankton during the spring and fall blooms on the continental shelf.

TL;DR: In situ measurements of this seepage flow have been made along four offshore transects in the Bay as discussed by the authors, showing that the flow rate decreases rapidly offshore; within 30 m of the shoreline, the submarine outflow rates were typically 40 l (day m 2 ) −1 and decreased to less than 10 l(daym 2 )−1 at a distance of 100 m from shore.

TL;DR: The distribution of microalgal biomass in the sediments and water column of a salt marsh and mudflat ecosystem was studied over a fifteen month period by fluorometric analysis of chlorophyll.

TL;DR: The occurrence of the height forms of Spartina alterniflora was directly related to marsh soil drainage and aeration in a natural salt marsh in North Carolina Linear regression analysis indicated that differential soil drainage among the tall forms accounted for 70% of the variation in plant height Total biomass of tall and medium Spartina and the aerial standing crop of short Spartina were significantly reduced when soil drainage was experimentally impaired in the field as discussed by the authors.

TL;DR: Mass transport of zooplankton into lees by fine-scale current patterns may be a major cause of plankton aggregation in some near-shore localities and may significantly affect the distribution of fish and benthic invertebrates.

TL;DR: In this paper, the influence of biological and physical factors on DO dynamics in an estuarine ecosystem near Calvert Cliffs, Chesapeake Bay was examined for the first time.

TL;DR: Investigation into the possibility of endemic populations avoiding or utilizing currents in a vertical and lateral plane as a mechanism of maintaining themselves within the Sundays rive estuary found that Acartia longipatella and A. natalensis remained in greater numbers near the bottom on the ebb tide, moving laterally into areas of slowest current velocity.

TL;DR: In this article, the steady state concentration of a particular substrate is independent of its rate of production (and thus of consumption) and depends only on purely physiological characteristics of the bacteria, which accounts for at least the order of magnitude of substrate concentrations observed, and the absence of important seasonal variations.

TL;DR: Although crabs could consume mussels over a wide size range they showed a marked reluctance to feed on larger mussels whilst smaller, more easily predated prey was still available, under regimes of unlimited prey availability both crabs showed a pronounced preference for specific size classes of mussels.

TL;DR: Burrowing may, therefore, significantly affect the composition and chemistry of salt marsh sediments and the population of crabs in the quadrats can turn over approximately 18% of the upper 15 cm of sediment in a salt marsh.

TL;DR: In this article, two general models of tidal dynamics are discussed: one assuming modification of tidal stage by the marsh channel, the second assuming that channels have a purely passive role, and a series of theoretical velocity curves are calculated using progressively more complex tidal approximations.

TL;DR: It was concluded that for moderate increases in nutrient concentrations, benthic productivity will be most enhanced in those sediments with very low concentrations of fine sized particles.

TL;DR: Zooplankton feeding and microbial breakdown in the water column rather than sedimentation to the sea-bed appear to be the important mechanisms determining removal rate of faecal pellets from the watercolumn in Kiel Bight, particularly in summer.

TL;DR: The Fraser River, the largest river reaching the west coast of Canada, is a sand-dominated river in which most sediment transport occurs during freshet in late spring and early summer as discussed by the authors.

TL;DR: The importance of benthic floc, zoobenthos, zooplankton and epiphytic flora and fauna as energy sources for the fishes of the Mhlanga estuary was studied between January and December 1978 as discussed by the authors.

TL;DR: In this paper, velocity profiles have been obtained within 2 m of the sea bed over a rippled sand in Start Bay, Devon, U.K. Simultaneous observation by underwater television has enabled the threshold of movement of the sand to be determined.

TL;DR: Tidal interaction with fjord constrictions is discussed in this paper, where two typical cases are thoroughly analyzed: the first is the so called tidal choking problem where the effect of vertical stratification is insignificant.

TL;DR: In this paper, the authors used the Hansen and Rattray classification of the Columbia River Estuary at low discharge to estimate the diffusive fraction of the upstream salt flux in reasonable agreement with the observed values, and they also provided reasonable estimates of P and F m for low discharge condition but for high discharge only the estimate of P is reasonable.

TL;DR: In this article, consistent patterns of larval fish distributions were found to occur along the Oregon coast between the Columbia River and Cape Blanco during winter-spring months for the years 1972-1975.

TL;DR: The flounder Platichthys flesus was studied between October 1970 and August 1973 in the Ythan estuary, Aberdeenshire, Scotland and it was found that flounders fed by arching the body above the substratum in order to obtain and angled bite of the sediment.

TL;DR: The free-living nematodes inhabiting silty and medium to coarse sands at nine stations in the New York Bight Apex were studied from August 1973 to September 1974; no significant differences in density associated with sediment type, organic carbon or heavy metal concentrations were observed.

TL;DR: In this article, a 1-year field investigation was initiated to examine these variables on the growth of this species and on the levels of selected substrate variables, and the experimental design was a randomized complete block design with a factorial arrangement of treatments (five elevations × two drainage treatments).

TL;DR: In this paper, the pollen of alien weeds and ornamentals was used to determine sedimentation rates in four California coastal salt marshes and the results indicate that during the present century sedimentation rate have been ca 50 cm/100 years in southern California and 10 cm/ 100 years in central California.

TL;DR: It is proposed that adult mortality risk is correlated positively with egg number and inversely with egg size, and for several species, egg size increases and egg number decreases in populations at more northern latitudes and in populations breeding during colder seasons.

TL;DR: In this paper, the potential availability of the soluble phosphorus to estuarine algae is discussed, with the help of other chemical analyses, in terms of various physico-chemical forms in which the phosphorus may exist in sediments.

TL;DR: The toxicity of ions of a single metal to natural assemblages of phytoplankton enriched with nitrate, phosphate, and silicate was assessed by measuring the inhibition of plant growth as mentioned in this paper.

TL;DR: In this paper, the main factors that cause variability of these ecological properties and to frame some generalizations about the offshore waters during the summer season were investigated for San Quintin Bay, Baja California, Mexico.

TL;DR: In this paper, animals collected in Juncus roemerianus and Spartina cynosuroides marshes in St. Louis Bay, Mississippi, were analysed for δ13C to determine their food sources.

TL;DR: In this paper, the flow of water into and out of a kelp-bed on the west coast of southern Africa has been monitored over a 24-day period, spanning three upwelling cycles.

TL;DR: In this paper, the dynamics of a large fjord basin lying between comparatively deep sills where tidal mixing is vigorous were studied. But the authors focused on the dynamics in a small basin embraced by sills.