Results 71 to 80 of about 3,307 (174)

Morphometric variability of Carabidae as an indicator of ecological restoration of revitalized habitats in the European important protected landscape area of the Danube floodplains [PDF]

open access: yesPeerJ
Revitalization measures currently represent an important tool in ecological practice for the recovery of disturbed habitats, and their effectiveness is increasingly assessed using bioindicator groups, including ground beetles (Carabidae).
Vladimír Langraf   +2 more
doaj   +2 more sources

BioCalc: a software tool for the calculation of biovolume of phytoplankton samples

open access: yes, 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   +2 more
openaire   +1 more source

Comparison of Microphototrophic Communities Living in Different Soil Environments in the High Arctic

open access: yesFrontiers 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   +5 more
doaj   +1 more source

The use of genus-level determinations and biovolume classes as surrogates to indicate environmental drivers of stream diatom communities in the Brazilian Pampa [PDF]

open access: yesAnais 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

Decrease of diatom biovolume in biofilms exposed to arsenic

open access: yes, 2015
La pollution par l’arsenic est un problème mondial. Les eaux (de surface et souterraines) en sont la voie principale de contamination. Nous avons mené une expérience visant à étudier les effets de ce métal sur les descripteurs fonctionnels et structurels des communautés de diatomées benthiques (Barral-Fraga et al., 2015).
Barral Fraga, L.   +2 more
openaire   +1 more source

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

open access: yesActa 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

open access: yesGeophysical 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   +8 more
doaj   +1 more source

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

open access: yesPLOS 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.
openaire   +4 more sources

Periphytic algal biomass in two distinct regions of a tropical coastal lake

open access: yesActa 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   +1 more
doaj  

Planktonic Cyanobacteria of the tropical karstic lake Lagartos from the Yucatan Peninsula, Mexico

open access: yesRevista 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   +3 more
doaj  

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