Results 1 to 10 of about 5,915 (215)

New geometric models for calculation of microalgal biovolume [PDF]

Brazilian Archives of Biology and Technology, 2011
Biovolume calculation of micro algae is commonly used for the assessment in relative abundance (as biomass or carbon) of coexistent algae that vary in shape and/or size. Periphyton samples were obtained within a more general program, in fishery tanks and
Bárbara Idino Konoplya, Francisco Striquer Soares   +1 more
doaj   +5 more sources

Digital holographic microscopy for microalgae biovolume assessment [PDF]

Optics Communications, 2015
Abstract The relative amount of biomass in a body of water is one of the various indicators widely used in water quality evaluation. This implies complex tasks such as identification and characterization of microorganisms and measurement of their biovolume.
Monaldi, Andrea Carolina, Romero, Gladis Graciela, Alanis, Elvio, Cabrera de la Rosa, Carlos Matias   +3 more
exaly   +4 more sources

A global diatom database – abundance, biovolume and biomass in the world ocean [PDF]

Earth System Science Data, 2012
Abstract. Phytoplankton identification and abundance data are now commonly feeding plankton distribution databases worldwide. This study is a first attempt to compile the largest possible body of data available from different databases as well as from individual published or unpublished datasets regarding diatom distribution in the world ocean.
Leblanc, K., Arístegui, J., Armand, L., Assmy, P., Beker, B., Bode, A. (Antonio), Breton, E., Cornet, V., Gibson, J., Varela-Rodríguez, M. (Manuel), Gosselin, M.P., Kopczynska, E., Marshall, H., Peloquin, J., Piontkovski, S., Poulton, A.J., Quéguiner, B., Schiebel, R., Schiebel, R., Shipe, R., Stefels, J., van Leeuwe, M.A., Widdicombe, C. (Claire), Yallop, M.   +23 more
openaire   +14 more sources

Effect of phytoplankton morphology on the measurement of biovolume. [PDF]

J Plankton Res
Abstract Algal biovolume is a standard measurement for limnological and oceanographic studies, which is used to proxy biomass and productivity. Manual and automatic methods can be applied to estimate biovolume from phytoplankton images. We examined the effects of algal shape and taxon (largely genus) on the accuracy of automatic image-
Farrow CR, Ackerman JD.
europepmc   +3 more sources

Estimation of cyanobacteria biovolume in water reservoirs by MERIS sensor

Water Research, 2014
Planktonic cyanobacteria primarily develop in lentic water bodies, such as lakes and water reservoirs. In certain instances, toxin-producing cyanobacterial populations might dominate the phytoplankton community. Satellite remote sensing is a useful tool for large spatial scale monitoring of cyanobacteria, and the MERIS sensor from the Envisat satellite
M Medina-Cobo, Antonio Quesada
exaly   +4 more sources

Biovolume and biomass estimates of key diatoms in the Southern Ocean [PDF]

Aquatic Microbial Ecology, 2007
Linear measurements of 31 Southern Ocean diatom species or genus groupings are pre- sented and used in the derivation of species-specific biovolume, biomass and surface to volume ratios. Species measurements are in tune with summarised values in the literature and range from 2.6 to 2296 µm in length and 8.5 to 140 µm in diameter.
Leanne Armand, Bernard Quéguiner
exaly   +4 more sources

Similar growth potentials of cyanobacteria and algae explain their coexistence in desert soils [PDF]

Scientific Reports
In deserts that cover one-third of the Earth’s terrain, soil cyanobacteria and algae are key carbon dioxide (CO2) fixers because few other plants can tolerate intense solar radiation, prolonged desiccation, and extreme temperature shifts.
Khin Maw Kyi, Elad Levintal, Nina A Kamennaya   +2 more
doaj   +2 more sources

Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes [PDF]

Acta Limnologica Brasiliensia, 2017
Aim: We analyzed the temporal distribution (dry and rainy periods) of phytoplankton functional groups (biovolume) from lakes connected to dammed (S1 - Paraná River) and non-dammed rivers (S2 - Baia River and S3 - Ivinhema River) in the upper Paraná River
Alfonso Pineda, Geovani Arnhold Moresco, Aline Caroline Magro de Paula, Luciane Maria Nogueira, Patricia Iatskiu, Yasmin Rodrigues de Souza, Larissa Mozini Reis, Luzia Cleide Rodrigues   +7 more
doaj   +3 more sources

Visualisation and biovolume quantification in the characterisation of biofilm formation in Mycoplasma fermentans [PDF]

Scientific Reports, 2021
AbstractThe ability of mycoplasmas to persist on surfaces has been widely acknowledged, despite their fastidious nature. However, the organism’s capability to form a recognisable biofilm structure has been identified more recently. In the current study Mycoplasma fermentans was found to adhere to the glass surface forming highly differentiated biofilm ...
Ammar A. Awadh, Alison F. Kelly, Gary Forster-Wilkins, David Wertheim, Richard Giddens, Simon W. Gould, Mark D. Fielder   +6 more
openaire   +4 more sources

Toxic effects of chlorpyrifos, cypermethrin and glyphosate on the non-target organism Selenastrum capricornutum (Chlorophyta)

Anais da Academia Brasileira de Ciências, 2021
The toxic effects of the insecticides chlorpyrifos and cypermethrin, and the herbicide glyphosate on the growth, biovolume and ultrastructure of the green microalgae Selenastrum capricornutum were evaluated.
CAROLINA FERNÁNDEZ, VIVIANA ASSELBORN, ELISA R. PARODI   +2 more
doaj   +1 more source