Results 1 to 10 of about 12,430 (145)

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

open access: yesScientific 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   +2 more
doaj   +2 more sources

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

open access: yesAnais 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   +2 more
doaj   +1 more source

Types and Distribution of Bioactive Polyunsaturated Aldehydes in a Gradient from Mesotrophic to OligotrophicWaters in the Alborán Sea (Western Mediterranean) [PDF]

open access: yes, 2020
Polyunsaturated aldehydes (PUAs) are bioactive molecules suggested as chemical defenses and infochemicals. In marine coastal habitats, diatoms reach high PUA production levels during bloom episodes.
Bartual Magro, Ana   +11 more
core   +1 more source

Changes in Phytoplankton Community Composition and Phytoplankton Cell Size in Response to Nitrogen Availability Depend on Temperature

open access: yesMicroorganisms, 2022
The climate-driven changes in temperature, in combination with high inputs of nutrients through anthropogenic activities, significantly affect phytoplankton communities in shallow lakes. This study aimed to assess the effect of nutrients on the community
Veronika Dashkova   +6 more
doaj   +1 more source

Periphytic algal biomass in two distinct regions of a tropical coastal lake Biomassa de algas perifíticas em duas regiões distintas de uma lagoa costeira tropical

open access: yesActa Limnologica Brasiliensia, 2012
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   +3 more sources

New geometric models for calculation of microalgal biovolume

open access: yesBrazilian 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   +1 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

Copepod Feeding Responses to Changes in Coccolithophore Size and Carbon Content

open access: yesJournal of Marine Science and Engineering, 2022
Phytoplankton stoichiometry and cell size could result from both phenology and environmental change. Zooplankton graze on primary producers, and this drives both the balance of the ecosystem and the biogeochemical cycles.
Jordan Toullec   +6 more
doaj   +1 more source

Effect of large- and small- bodied zooplankton on phytoplankton in a eutrophic oxbow [PDF]

open access: yes, 2005
Macrozooplankton and microzooplankton effects on the phytoplankton were measured in situ in a eutrophic lake. Indigenous phytoplankton were incubated for 5 days in 301 mesocosms with either the macro- and microzooplankton (complete), microzooplankton ...
Borbély, György   +5 more
core   +1 more source

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

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