as potential indicators of anthropogenic disturbance: levels and gradients in the Kurtna study area
But some diatoms
are a health hazard to humans and marine animals, including birds and sea lions.
This is clearly demonstrated by the shift from species of the genera Aulacoseira, Cyclotella, Melosira, Stephanodiscus, and Synedra, observed in our study at the site unaffected by damming, to chain-forming diatoms
such as Aulacoseira and Melosira, observed at the sites affected by the river flow alteration.
Substrate characteristics affect colonization by the bloom-forming diatom
A total of 214 species of benthic diatoms
were found  and total of 104 species of benthic diatoms
were selected to establish a benthic diatoms
Index which was more than other indexes of Thailand [20, 28, 40] (Table 2).
If I can tell you how a single diatom
--a type of phytoplankton--can respond to a passing cloud, then I can tell you how diatom
populations respond to passing clouds.
2002) also reported that microparticulate diet fed to the abalone Haliotis discus discus was superior to diatoms
in terms of survival rate.
015 ml), homogenized quantity was placed in a PalmerMaloney counting chamber to survey the basic shape morphologies and condition of diatoms
(living or dead).
were grouped according to their habitat into plankton and periphyton, and according to their salinity tolerance, to brackish/marine, halophilous and freshwater taxa.
Some types of diatoms
known as red tides, for example, can be harmful to underwater ecosystems.
(Bacilliariophyta), in particular, are often used to assess environmental conditions.
, which appear to thrive in the windier conditions, have increased in the last five years, while dinoflagellates have "almost disappeared", Prof Hays said.