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Showing 1 to 18 of 18 for “"algal production"”.
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Lake Benthic Algal Production and Extracellular Material
Littoral zone primary production is under-studied relative to the pelagic zone, despite recent work indicating its importance to the lake as a whole. Benthic extracellular material, shown to be important for food web dynamics and stabilization of the surrounding ecosystem in the marine intertidal, …
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Avian determinants of rocky intertidal community structure in South Africa
… status. Monthly measurements were made of algal production and of the growth, density, reproductive condition and mortality of the dominant intertidal herbivore, Patella granularis.The rate of intertidal algal production was enhanced on shores washed by nutrient-rich waters, and the growth …
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Zooplankton abundance, community composition and grazing in the James River Estuary (Virginia, USA)
… Estuary (Virginia, USA) exploit the available algal-food resources. Zooplankton abundance, community composition and grazing rates were assessed at three locations which included a site with high algal production (near the VCU Rice Center) and two sites where algal production was lower. Grazing …
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Sedimentary legacy of sockeye salmon (Oncorhynchus nerka) and climate change in an ultra-oligotrophic, glacially-turbid British Columbia nursery lake
… used indicators of spawner density (ä15N) and algal production (fossil pigments and diatoms) to show that lake trophic status is often regulated by climate and harvest via MDN from adult spawners. However, the strength of these controls and the utility of the paleolimnological techniques for …
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Sedimentary legacy of sockeye salmon (Oncorhynchus nerka) and climate change in an ultra-oligotrophic, glacially-turbid British Columbia nursery lake
… used indicators of spawner density (ä15N) and algal production (fossil pigments and diatoms) to show that lake trophic status is often regulated by climate and harvest via MDN from adult spawners. However, the strength of these controls and the utility of the paleolimnological techniques for …
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Sediment Resuspension in a Microtidal Estuary: Causative Forces and Links with Algal Blooms
… and species diversity has increased, however, algal blooms (primarily dinoflagellates) persist, occurring nearly every summer. Dinoflagellates produce resting cysts that accumulate in the bottom sediments and are thought to provide seed populations for future algal blooms when they are …
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Production and preservation of the Arctic sea ice diatom biomarker IP25
… was established previously, the nature of its production within sea ice, along with its transport through the water column to underlying sediments and its short-term preservation therein, had not been investigated in any significant detail. Variations in the concentration of the sea ice diatom …
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Carbon Limitation in Periphytic Algal Wastewater Treatment Systems
… discharged to receiving waters, they stimulate algal blooms. Algal blooms can reduce dissolved oxygen, block sunlight for submerged aquatic plants, and render state waters unusable for recreational activities; these issues can negatively impact ecological systems and local economies. One …
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Agricultural and forest land runoff in upper South River near Waynesboro, Virginia
… treatment plant effluent may reduce excessive algal production in the South River below the city of Waynesboro.
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Exploring the Potential of Algae-Bacteria Communities For Biotechnology
… algae spread across many phyla. Traditional algal biotechnology approaches have focused on growing algae in monoculture, in contrast to nature, where algae live in association with many other organisms. One association of interest is between the bacterium Mesorhizobium loti (Rhizobiales) and …
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Identification and characterization of odorous metabolites produced by selected freshwater algae
… of taste-and-odor problems that are caused by algal metabolites in water supplies has been well documented. Several commonly occurring odor-producing algae were selected and cultured for this research. Initial studies involved the algal cells and cell-free media from cultures grown under fairly …
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Effects of copper on benthic communities in artificial microcosms
Due to perceived shortcomings in some aspects of hazard assessment for chemicals administered to aquatic systems, experiments were conducted to determine the effects of copper on various ecological parameters in artificial streams and microcosms. Effects investigated were colonization and growth of …
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Design of a Nutrient Reclamation System for the Cultivation of Microalgae for Biofuel Production and Other Industrial Applications
<p>Microalgal biomass has been identified as a promising feedstock for a number of industrial applications, including the synthesis of new pharmaceutical and biofuel products. However, there are several economic limitations associated with the scale up of existing algal production processes. …
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Investigation of the closed loop processing systems developed for microalgal biofuels
The algal biofuels industry is under development and being investigated at large scale all around the world. To improve the viability of algal biofuels the ability to use closed loop systems that recycle waste and water thereby decreasing the overall waste produced while increasing profitability is …
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HYPORHEIC FLOW, RESIDENCE TIMES AND NITROGEN REACTIONS IN A RIFFLE-POOL SEQUENCE, TRUCKEE RIVER, NV.
Excessive algal production and subsequent decomposition contributes to fine particulate organic matter that reduces riverbed porosity and permeability and promotes microbial activity that stimulates nitrogen transformations. In the hyporheic zone, physical and biogeochemical processes controlling …
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Past and present benthic fauna of Lake Maratoto with special reference to the chironomidae
… that increases in larval numbers are linked to algal production and eventual sedimentation of autochthonous organic matter. Principal component analyses were used to predict the limnological characteristics of a lake from knowledge of its surficial sediment chironomid remains. Dystrophic lakes …
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Genetic and phylogenetic characterization of microalgae strains in view of their exploitation for CO2 capture and biofuel production
In the light of for sustainable development, microalgal biodiesel, as a renewable and sustainable energy type, has enjoyed a surge in popularity. In fact, differently from the first generation biofuels, the use of microalgae to produce bioenergy does not involve the triggering of "food for fuel" …
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Understanding Effects of Anthropogenic Activities on Element Cycling in Temperate Forest Watersheds
… the tree canopy emerged and when in-stream algal production was high. In this system and on these short timescales, we were unable to elicit the same responses observed at sites across the chronic N deposition gradient in Chapter 2. We did, however, observe that DOM processing and …