Results 31 to 40 of about 13,506 (299)

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

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

Phylogenetic analysis and a review of the history of the accidental phytoplankter, Phaeodactylum tricornutum Bohlin (Bacillariophyta). [PDF]

open access: yesPLoS ONE, 2018
The diatom Phaeodactylum tricornutum has been used as a model for cell biologists and ecologists for over a century. We have incorporated several new raphid pennates into a three gene phylogenetic dataset (SSU, rbcL, psbC), and recover Gomphonemopsis sp.
Jamal S M Sabir   +11 more
doaj   +1 more source

Responses of Marine Diatom-Dinoflagellate Competition to Multiple Environmental Drivers: Abundance, Elemental, and Biochemical Aspects

open access: yesFrontiers in Microbiology, 2021
Ocean-related global change has strongly affected the competition between key marine phytoplankton groups, such as diatoms and dinoflagellates, especially with the deleterious consequency of the increasing occurrence of harmful algal blooms.
Rong Bi   +11 more
doaj   +1 more source

Diversity of Diatom Communities in Delaware Tidal Wetland and Their Relationship to Water Quality

open access: yesFrontiers in Environmental Science, 2018
Diatoms are strongly influenced by water quality and serve as indicators of water quality degradation in freshwater systems. Here, sediment and water samples were collected from four sites in Blackbird Creek, DE, a salt marsh characterized as mostly ...
Lathadevi K. Chintapenta   +8 more
doaj   +1 more source

Sensitivity of freshwater periphytic diatoms to agricultural herbicides [PDF]

open access: yes, 2009
The biomonitoring of pesticide pollution in streams and rivers using algae such as diatoms remains difficult. The responses of diatomcommunities to toxic stress in streamwater are disturbed by the variations of environmental parameters.
Silvestre, Jérôme   +8 more
core   +1 more source

Reconstruction of Holocene sea-levels using diatom- and pollen-based microfossil transfer functions, west coast of Scotland, UK [PDF]

open access: yes, 2007
Due to its sensitivity to isostatic and eustatic sea-level change the west coast of Scotland has been an important area for studying sea-level change. Recently, data from north west Scotland have been used to refine GIA models because of the presence of ...
Gregory, Caroline
core  

Factors influencing the stable carbon isotopic composition of suspended and sinking organic matter in the coastal Antarctic sea ice environment [PDF]

open access: yes, 2011
A high resolution time-series analysis of stable carbon isotopic signatures in particulate organic carbon (δ13CPOC) and associated biogeochemical parameters in sea ice and surface waters provides an insight into the factors affecting δ13CPOC in the ...
Carson, D. S.   +26 more
core   +1 more source

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