can also be found in soils and are considered to be potentially good environmental indicators of terrestrial ecosystem properties (van Kerckvoorde et al.
The design above, which is about half a millimeter across, incorporates freshwater, marine and fossilized diatoms
In order to estimate the proportion of living diatoms
in the measured BSi, we attempted to recalculate the particulate silica concentration from the diatom
Although there is currently no published scientific evidence to suggest this diatom
has adversely affected salmonids in California or elsewhere, we initiated our study to provide preliminary information on the effects of didymo under bloom conditions to benthic macroinvertebrates that serve as potential forage for juvenile Chinook salmon and steelhead.
The water and the benthic diatoms
samples were collected from the upper, middle and lower parts of each river, some physical and chemical parameters were studied in the summer, rainy and cool dry seasons from March 2008-January 2009.
This is the first time this has been shown in diatoms
Natural populations of diatoms
that are attached to corrugated polyvinyl plates do not ensure a consistent supply of desired diatom
species required by abalone larvae (de la Pena et al.
are especially well suited to inhabit temporary aquatic habitats due to their ubiquity and cosmopolitan distributions.
In the current study diatoms
, loss-on-ignition (LOI), magnetic susceptibility (MS) and radiocarbon dates of the sediment cores of two North Estonian lakes have been examined for the purpose of detecting the age of the isolation of these lakes from the Limnea Sea, acting as a complement to older investigations (Kessel & Linkrus 1979; Heinsalu 2000; Saarse et al.
At least half of the heat-trapping carbon captured by the resulting bloom of diatoms
, a type of algae, sank below 3,300 ft, leading the scientists to conclude that "iron-fertilized diatom
blooms may sequester carbon for timescales of centuries in ocean bottom water and for longer in the sediments.
Key words: Trophic Diatom
Index, Shannon Biodiversity Index, diatoms
, reference site, morphological characteristics
This may sound far-fetched, but we have found changes of this magnitude in the biology of the North Atlantic, with a dramatic switch in the prevalence of dinoflagellates to diatoms
- two groups which include many of the microscopic planktonic plants forming the base of the ocean's food chain.
and their population distributions serve as indicators of water conditions and changes that might be taking place therein.
from the genus Rhizosolenia, in particular, contain a cyanobacteria that fixes nitrogen from the atmosphere.
1996, "Evolution of the diatoms