Results 21 to 30 of about 3,434 (170)

Spatial and temporal fluctuation of phytoplankton functional groups in a tropical reservoir - doi: 10.4025/actascibiolsci.v35i3.12988

open access: yesActa Scientiarum: Biological Sciences, 2013
Along the horizontal axis of reservoirs are generally recognized three zones (fluvial, transition and lacustrine) with distinct hydrodynamic and physical, chemical and biological properties.
Lívia Oliveira Ruiz Moreti   +3 more
doaj   +1 more source

Influence of biotic and abiotic sediment factors on abundance and biomass of harpacticoid copepods in a shallow Antarctic bay

open access: yesScientia Marina, 2005
This study presents data of the first investigation on benthic harpacticoid copepods in Potter Cove, King George Island, Antarctica (62°14’S, 58°40’W) with special emphasis on spatial distribution and relation to environmental factors. In addition to the
Gritta Veit-Köhler
doaj   +1 more source

Visualization and quantification of the cellular and extracellular components of Salmonella Agona biofilms at different stages of development. [PDF]

open access: yesPLoS ONE, 2018
Salmonella is a major food-borne pathogen able to persist in food processing environments because of its ability to form biofilms. A Salmonella enterica serotype Agona isolate from poultry (S24) was grown at 37°C in biofilms for up to 144 hours (H144) in
Camino González-Machado   +3 more
doaj   +1 more source

Plankton abundance, biovolume, and normalized biovolume size spectra in the northern slope of the South China Sea in autumn 2014 and summer 2015 [PDF]

open access: yesDeep Sea Research Part II: Topical Studies in Oceanography, 2019
Abstract Plankton abundance, biovolume and distribution in the northern slope of the South China Sea in summer 2015 and autumn 2014 were assessed by using flow cytometry and microscopy (FlowCAM) and ZooScan methods. Copepoda was the most dominant zooplankton in both seasons. Rhizosolenia dominated the phytoplankton community in autumn. In summer, the
Wenjing Zhang   +6 more
openaire   +1 more source

Mass Cultivation of Microalgae: II. A Large Species Pulsing Blue Light Concept

open access: yesBioTech, 2023
If mass cultivation of photoautotrophic microalgae is to gain momentum and find its place in the new “green future”, exceptional optimizations to reduce production costs must be implemented.
Hans Chr. Eilertsen   +4 more
doaj   +1 more source

Use of CMEIAS Image Analysis Software to Accurately Compute Attributes of Cell Size, Morphology, Spatial Aggregation and Color Segmentation that Signify in Situ Ecophysiological Adaptations in Microbial Biofilm Communities

open access: yesComputation, 2015
In this review, we describe computational features of computer-assisted microscopy that are unique to the Center for Microbial Ecology Image Analysis System (CMEIAS) software, and examples illustrating how they can be used to gain ecophysiological ...
Frank B. Dazzo, Brighid C. Niccum
doaj   +1 more source

Relationships between biovolume and carbon and nitrogen content of bacterioplankton [PDF]

open access: yesFEMS Microbiology Ecology, 1994
Cell volume, carbon and nitrogen content were determined for bacteria grown in batch cultures in water samples collected at five localities in western Florida, USA. Cultures were set up by inoculating 0.2 μm filtered water with 2.5 to 7.0% of 1.0 μm filtered water. Biovolumes of the bacteria were measured by epifluorescence photomicrography.
openaire   +2 more sources

Relationship between chlorophyll a pigment and algal geometric biovolume determination in a floodplain lake (Ciénaga Ayapel, Córdoba-Colombia)

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2012
The estimation of biomass of planktonic algae can be done by two methods, the quantification of geometric biovolume and chlorophyll a. This work which considers as environmental scenario the Ayapel-Cordoba flood-plain lake, introduces (presents) the two
Esnedy Hernández   +2 more
doaj   +1 more source

Algorithm to estimate cell biovolume using image analyzed microscopy [PDF]

open access: yesCytometry, 1989
AbstractThis paper describes an algorithm for calculating the biovolume of cells with simple shapes, such as bacteria, flagellates, and simple ciliates, from a 2‐dimensional digital image. The method can be adapted to any image analysis system which allows access to the binary cell image—(i.e.), the pixels, or (x, y) points, composing the cell.
M E, Sieracki, C L, Viles, K L, Webb
openaire   +2 more sources

Zooplankton size composition and production just after drastic ice coverage changes in the northern Bering Sea assessed via ZooScan

open access: yesFrontiers in Marine Science, 2023
Drastic environmental changes were noted in the northern Bering Sea in 2018. A reduction in sea ice affected several trophic levels within the ecosystem; this resulted in delayed phytoplankton blooms, the northward shifting of fish stocks, and a decrease
Shino Kumagai   +4 more
doaj   +1 more source

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