Results 241 to 250 of about 15,462 (278)
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Respiration rates and biovolumes of common benthic Foraminifera (Protozoa)
Journal of the Marine Biological Association of the United Kingdom, 1994The respiration rates of five genera of benthic Foraminifera were determined by Cartesian diver microrespirometry. Across all genera studied, the rate averaged 11·3×10−3μl O2individual−1h−1at 10°C. Estimates of foraminiferal mean biovolumes ranged from 0·66 to 6·54×106μm3, giving an overall mean volume-specific respiration rate of 7·36 × 10−9μl O2h−1μm−
Fiona Hannah +2 more
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New data‐driven method from 3D confocal microscopy for calculating phytoplankton cell biovolume
Journal of Microscopy, 2015SummaryConfocal laser scanner microscopy coupled with an image analysis system was used to directly determine the shape and calculate the biovolume of phytoplankton organisms by constructing 3D models of cells. The study was performed on Biceratium furca (Ehrenberg) Vanhoeffen, which is one of the most complex‐shaped phytoplankton.
L. Roselli +3 more
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Estimation of Submergent Plant Bed Biovolume using Acoustic Range Information
Canadian Journal of Fisheries and Aquatic Sciences, 1990Acoustic measurements of the distance between the water surface, top of the aquatic plants, and bottom of the water column were made using chart recording echosounders. The vertical cross sectional area (m2), height (m), biovolume (m3), of aquatic plant beds and variances were computed for three surveys of Devils Lake, Oregon, in May, July, and ...
G. L. Thomas +4 more
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Change in cyanobacterial biovolume due to preservation by Lugol's Iodine
Harmful Algae, 2005Cyanobacterial biovolume is used as a guide to the public health risk from these organisms for users of potable and recreational waters. Most routine surveillance programs preserve phytoplankton samples before analysis. We tested the effect of Lugol’s Iodine, a common preservative, on the cell biovolume of four common freshwater cyanobacteria ...
Peter R. Hawkins +3 more
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Short-term variations in specific biovolumes of different bacterial forms in aquatic ecosystems
Microbial Ecology, 1991Short-term and spatial fluctuations in specific biovolumes (volume x cell(-1)) of different morphological categories of planktonic bacteria were estimated microscopically. Samples were taken from two lakes occurring in two different climatic systems: Lake Aydat (France) and Lake Cromwell (Canada).
Sime-Ngando, Télesphore +3 more
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Research in Microbiology, 2004
Biofilms are bacterial colonies enveloped in a matrix of extracellular polymeric secretions. Confocal scanning laser microscopy has been used in conjunction with different image analysis techniques to investigate the structure of biofilms. A major goal is to reconstitute the three-dimensional structure of biofilms, and compute or estimate the ...
Petrisor, Alexandru I. +2 more
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Biofilms are bacterial colonies enveloped in a matrix of extracellular polymeric secretions. Confocal scanning laser microscopy has been used in conjunction with different image analysis techniques to investigate the structure of biofilms. A major goal is to reconstitute the three-dimensional structure of biofilms, and compute or estimate the ...
Petrisor, Alexandru I. +2 more
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Harmful Algae, 2020
Toxic cyanobacterial blooms are becoming more prevalent in freshwater systems, increasing the need for monitoring to protect human health. Phycocyanin fluorescence sensors have been developed as tools for providing fast and cost-effective proxy measurements for cyanobacterial biomass.
Georgia, Thomson-Laing +2 more
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Toxic cyanobacterial blooms are becoming more prevalent in freshwater systems, increasing the need for monitoring to protect human health. Phycocyanin fluorescence sensors have been developed as tools for providing fast and cost-effective proxy measurements for cyanobacterial biomass.
Georgia, Thomson-Laing +2 more
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The Significance of Hyphal Diameter in Calculation of Fungal Biovolume
Oikos, 1979Three ways to calculate average hyphal cross section in agarfilm slides were compared in a field study including 5 soil horizons sampled 4 times. The method of calculation strongly affected the estimated value for soil fungal biovolume. Biovolume estimated with the different methods varied by more than 30%.
Erland Bååth +3 more
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