Results 71 to 80 of about 3,434 (170)

Rapid and versatile routine measurements of plankton biovolumes with BACCHUS [PDF]

Journal of Plankton Research, 1999
A semi-automated biovolume measurement application called BACCHUS (Biovolume Analysis Cum Calculus and High Utility Statistics), based on an image-analysis program combined with a database, was developed. With this application, biovolumes of plankton taxa can be determined while counting routine samples.
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Comparison of Microphototrophic Communities Living in Different Soil Environments in the High Arctic

Frontiers in Ecology and Evolution, 2019
The Arctic region undergoes rapid climate change resulting in soil warming with consequent changes in microbial community structure. Therefore, it is important to gain more knowledge on the pioneer photosynthetic microorganisms and their relations to ...
Ekaterina Pushkareva, Ekaterina Pushkareva, Annick Wilmotte, Kamil Láska, Josef Elster, Josef Elster   +5 more
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The use of genus-level determinations and biovolume classes as surrogates to indicate environmental drivers of stream diatom communities in the Brazilian Pampa [PDF]

Anais da Academia Brasileira de Ciências
The demand for low-cost and time-efficient biomonitoring and ecological assessment strategies has increased due to threats to biodiversity. We evaluated the ability of surrogates (genera and biovolume classes) to access information provided by diatom ...
ANA PAULA TAVARES COSTA, FABIANA SCHNECK
doaj   +1 more source

A Simple yet Accurate Method for the Estimation of the Biovolume of Planktonic Microorganisms

PLOS ONE, 2016
Determining the biomass of microbial plankton is central to the study of fluxes of energy and materials in aquatic ecosystems. This is typically accomplished by applying proper volume-to-carbon conversion factors to group-specific abundances and biovolumes.
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BioCalc: a software tool for the calculation of biovolume of phytoplankton samples

, 2019
The estimate of cell biovolume, based on measurements of linear dimensions of shapes adapted to standard geometric models, is important for the study of phytoplankton ecology. However, time-consuming calculations are required for the estimation of biovolume from linear measurements.
dos Santos-Silva, Edinaldo Nelson, Mendes, Raize Castro, Cavalcanti, Mauro José   +2 more
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Periphytic algal biomass in two distinct regions of a tropical coastal lake

Acta Limnologica Brasiliensia
AIM: This study assessed the phycoperiphyton biomass in two regions submitted to different human impacts on Juara Lake, a coastal ecosystem with multiple uses, to order to test the hypothesis that the sampling sites that receive domestic sewage shows ...
Stéfano Zorzal de Almeida, Valéria de Oliveira Fernandes   +1 more
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Influence of substratum surface roughness on periphytic algal community structure in a shallow tropical reservoir Influência da rugosidade do substrato sobre a estrutura da comunidade de algas perifíticas em reservatório raso tropical

Acta Limnologica Brasiliensia, 2012
AIM: This study aimed to evaluate the algal periphytic community structure on substrates with differing surface roughness in early and longer-term colonization; METHODS: Periphyton was sampled after 30 days (June 24 to July 24, 2008) and 5 days (July 07 ...
Mariane Lima de Souza, Carla Ferragut
doaj  

Physical and Ecological Forcings Drive the Particle Dynamics and Enhanced Carbon Export Efficiency in the Tropical Marginal Sea

Geophysical Research Letters
Marginal seas contribute disproportionately to the ocean carbon cycle but remain poorly constrained due to strong spatial and seasonal variability. Here, we combine newly collected in situ particle imagery with machine learning to reconstruct monthly ...
Zengchao Xu, Yibin Huang, Feipeng Xu, Yichong Wang, Wenxin Fan, Weinan Li, Jixin Chen, Xin Liu, Bangqin Huang   +8 more
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Planktonic Cyanobacteria of the tropical karstic lake Lagartos from the Yucatan Peninsula, Mexico

Revista de Biología Tropical, 2013
The tropical karstic lakes on the Mexican Caribbean Sea coast are numerous. However, there is an enormous gap of knowledge about their limnological conditions and micro-algae communities. In the present study, surface water samples were collected monthly
Francisco Valadez, Gabriela Rosiles-González, Antonio Almazán-Becerril, Martin Merino-Ibarra   +3 more
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Nitrate, water temperature, conductivity, and transparency drive littoral phytoplankton species composition and biovolume in two reservoirs in the Xingu river

Water Biology and Security
Ecological interactions in the littoral zone maintain water quality, biodiversity, and ecological services in freshwater ecosystems. Phytoplankton occupy a central position in the ecosystem due to their sensitivity to environmental changes and ecological
Dilailson Araújo de Souza, Francieli de Fátima Bomfim, Daniela Santana Nunes, Thiago Bernardi Vieira, Juliana Feitosa Felizzola, Karina Dias-Silva   +5 more
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