Results 31 to 40 of about 45,371 (305)

Are marine diatoms favoured by high Si:N ratios? [PDF]

open access: yes, 1994
Competition experiments were performed first with 4, then with 11 species of marine phytoplankton at various ratios of si1icate:nitrate and various light intensities.
Sommer, Ulrich
core   +1 more source

Insights into the transfer of silicon isotopes into the sediment record [PDF]

open access: yesBiogeosciences, 2016
The first δ30Sidiatom data from lacustrine sediment traps are presented from Lake Baikal, Siberia. Data are compared with March surface water (upper 180 m) δ30SiDSi compositions for which a mean value of +2.28‰ ±  0.09 (95 % confidence) is derived.
V. N. Panizzo   +6 more
doaj   +1 more source

Contribution of epilithic diatoms to benthic−pelagic coupling in a temperate river [PDF]

open access: yes, 2013
Water residence time in the middle course of rivers is often too short to allow substantial phytoplankton development, and primary production is essentially provided by benthic phototrophic biofilms.
Buffan-Dubau, Evelyne   +7 more
core   +4 more sources

Evaluation of L/D ratio in a water-related case for the differentiation between drowning and postmortem immersion

open access: yesForensic Science International: Synergy, 2019
It is a difficult task to determine the cause of death for decomposed bodies found in water. Diatom test has been shown to provide supportive evidence for the diagnosis of drowning.
Zhigang Li   +9 more
doaj   +1 more source

Dynamic diatom response to changing climate 0–1.2 Ma at Lake El'gygytgyn, Far East Russian Arctic [PDF]

open access: yesClimate of the Past, 2013
The Lake El'gygytgyn sediment record contains an abundant diatom flora through most intervals of the lake's history, providing a means to create and test hypotheses concerning the lake's response to changing climates.
J. A. Snyder   +2 more
doaj   +1 more source

Inclusion of photoautotrophic cultivated diatom biomass in salmon feed can deter lice.

open access: yesPLoS ONE, 2021
The aim of this study was to evaluate the potential of diatom (microalgae) biomass as a lice-reducing ingredient in salmon feed. The original hypothesis was based on the fact that polyunsaturated aldehydes (PUAs), e.g.
Hans Chr Eilertsen   +12 more
doaj   +1 more source

Integrative effects of morphology, silicification, and light on diatom vertical movements

open access: yesFrontiers in Plant Science, 2023
Diatoms represent the most abundant and diversified class of primary producers in present oceans; their distinctive trait is the ability to incorporate silicic acid in a silica outer shell called frustule.
Alessandra Petrucciani   +3 more
doaj   +1 more source

Physiological and transcriptomic evidence for a close coupling between chloroplast ontogeny and cell cycle progression in the pennate diatom Seminavis robusta [PDF]

open access: yes, 2008
Despite the growing interest in diatom genomics, detailed time series of gene expression in relation to key cellular processes are still lacking. Here, we investigated the relationships between the cell cycle and chloroplast development in the pennate ...
Chepurnov, Victor A   +12 more
core   +3 more sources

Learning Diatoms Classification from a Dry Test Slide by Holographic Microscopy [PDF]

open access: yesSensors, 2020
Diatoms are among the dominant phytoplankters in marine and freshwater habitats, and important biomarkers of water quality, making their identification and classification one of the current challenges for environmental monitoring. To date, taxonomy of the species populating a water column is still conducted by marine biologists on the basis of their ...
Pasquale Memmolo   +7 more
openaire   +4 more sources

A Simple and Inexpensive Method to Gain Diatom Absolute Abundances from Permanent Mounts in Hydrobiological and Paleoecological Research

open access: yesApplied Sciences, 2023
Here, we describe and discuss a method based on microscopical field of view (FOV) area to estimate diatom absolute abundances (densities or concentrations), and we statistically verify its reliability, also comparing it to another commonly used method ...
Marco Cantonati   +3 more
doaj   +1 more source

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