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Showing 1 to 13 of 13 for “"seston"”.
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The influence of land use on the quality of seston in southern Appalachian stream ecosystems
Seston is the complex of organic and inorganic particles suspended in the water column in stream ecosystems. This detrital pool is a significant vector of energy and nutrients from headwaters to the ocean. Many of the processes involved in seston generation in streams involve the terrestrial …
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The impact of seasonally changing feeding habits on the secondary production and accumulation of mercury in a filter-feeding Caddisfly
… food types were not simply a matter of changing seston concentrations, but rather suggested a shift from a filter-feeding mode of feeding in the summer months to grazing on diatoms in the winter. H. morosa was bivoltine on the South River. The estimate of secondary production for the summer …
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The Effects of Food Quality and Temperature on Mesozooplankton Physiology
… of zooplankton biomass to temporal variations in seston N:P ratio was found in the North Sea and in the North Pacific Subtropical Gyre. Field measurements revealed latitudinal and temporal changes in food quality at the chlorophyll maximum along an Atlantic Meridional Transect (AMT). Better …
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Speciation and dynamics of phosphorus in relation to lake restoration methods
… other hypolimnetic fluxes. Sediment and settling seston organic P composition was determined using 31P nuclear magnetic resonance (NMR). Settling seston and sediment samples were analysed during winter and summer, representing, respectively, a mixing period when the water column was well …
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ENERGY FLOW AND MACROINVERTEBRATE PRODUCTION IN PANAMANIAN HIGHLAND STREAMS: ASSESSING THE IMPACTS OF AMPHIBIAN DECLINES
… and did not differ appreciably with season. Seston export was a major energetic flux in these systems, and differences in the nutritional quality (C:N) of seston in pre- and post-decline streams suggested that the loss of tadpoles may decrease the quality of materials exported from these …
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The effect of resource stoichiometry on fish and macroinvertebrate nutrient excretion
… were quantified. Epilithon, leaf detritus, and seston (fine particulate organic matter in transport) were collected and analyzed for carbon (C), nitrogen (N), and phosphorus (P) content in an attempt to qualitatively assess the nutritional status of the diet of primary consumers. …
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Panegyrici Latinei, 6 and 7 : Translated with introductions and commentary
… VII, proposed delivery dates of 31 March 307 (Seston et al.) and 25 December 307 (Lafaurie and Bruun) are discussed and rejected, along with the proposal of a third dies nataZis for Constantine; Sutherland's date of late April is upheld, but it is emphasized (pace Sutherland) that the speech …
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Estimating Nitrogen Fixation Rates, Importance, and Short-Term Efficiency in Small, Temperate Reservoirs Using Delta15N Techniques
… determination of N2 fixation using seston δ15N natural abundances indicated that N2 fixation rates throughout the warm season were substantial and influenced by water temperature. Annual N2 fixation rates ranged from 2.2 - 6.6 g N m-2 yr-1, and contributed up to 19% of the annual …
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The influence of spatiotemporal variation in food web models
… in stable isotopes of δ13C, δ15N, and δ34S in seston, a suspended mixture of zooplankton, phytoplankton, and particulate and dissolved detritus, reflected seasonal changes in the plankton community. Likewise, dynamics of δ13C, δ15N and δ34S in zoobenthos, including Dreissena spp. and …
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Biogeoquímica de la materia orgánica en zonas productivas del Atlántico sudoccidental
… nutrientes en la columna de agua y fracciones de seston, se caracterizó con trazadores isotópicos y moleculares de fuentes y sumideros de POC y PON. La disponibilidad de nutrientes inorgánicos, clorofila y la influencia de las propiedades oceanográficas tales como salinidad y temperatura fueron …
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Responses of zooplankton to variation in elemental composition of algae: Regulation at individual and ecosystem levels
… lake Daphnia was positively correlated with lake seston carbon:phosphorus (C:P) ratios. So, if algae are deficient in P (high C:P ratios), Daphnia filter more water, and so feed more intensively. This behaviour may be seen as a use of C assimilated in excess from the algae, this to generate more …
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Hidrología, química y dinámica planctónica de la laguna Chasicó (provincia de Buenos Aires, Argentina)
… estacionalidad debido a la alta variabilidad del seston. La combinación de isótopos estables, junto con la extraordinaria acumulación del ácido graso 20:4(n-3) en los ésteres de cera y la correlación del 20:4(n-3) con el 18:4(n-3) (r=0,77; p<0,001) permiten inferir la biosíntesis en el copépodo …
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The biogeography and trophic roles of coastal marine sponges (Porifera) from the west coast of the North Island, New Zealand: Influences of catchments.
… that marine food sources including coastal seston (>1.2–400 µm), coastal GFX (combined fine and coarse glass fibre filter samples >0.7–1.2 µm), and coastal bacteria (>0.2–0.7 µm) contributed the largest proportion to the diet of coastal sponges at 60–73% across our three stations. This was …