Diatoms are classified as eukaryotes, organisms with a membrane-bound cell nucleus, that separates them from the prokaryotes archaea and bacteria. Diatoms are a type of plankton called phytoplankton, the most common of the plankton types. Diatoms also grow attached to benthic substrates, floating debris, and on macrophytes.
Diatoms of North America. The source for diatom identification and ecology
A Widespread Group. There are over 100,000 species of diatoms that we know about on earth, and these species can be found wherever there is water, from oceans, to lakes, to even damp soils and ...
The valve face of the diatom frustule is ornamented with pores (areolae), processes, spines, hyaline areas and other distinguishing features. It is these skeletal features which are used to classify and describe diatoms, which is an advantage in terms of palaeontology since the same features are used to define extant species as extinct ones.
Types of diatoms. They can be classified according to the distribution of their pores. There are central diatoms that have a radial symmetry. When diatoms have a bilateral symmetry, then they are called pennades. There are four different types of diatoms: coscinodiscophyceae, mediophyceae, fragilariophyceae and bacillariophyceae.
ADVERTISEMENTS: In this article we will discuss about:- 1. Description of Diatoms 2. Characteristics of Diatoms 3. Classification 4. Occurrence 5. Plant Body 6. Cell Structure 7. Reproduction 8. Economic Importance. Description of Diatoms: It is a large group of algae consisting of 200 genera and over 10,000 species, out of which 92 genera and […]
Different types of diatoms have different morphological adaptations that allow them to survive in their respective habitats. For instance, diatoms that live in such aquatic habitats as ponds, lakes and oceans possess morphological features that make it possible for them to remain suspended in water.
Diatoms also have ranges and tolerances for other environmental variables, including nutrient concentration, suspended sediment, flow regime, elevation, and for different types of human disturbance. As a result, diatoms are vital for assessment and monitoring biotic condition of waters.
Diatom, (class Bacillariophyceae), any member of the algal class Bacillariophyceae (division Chromophyta), with about 16,000 species found in sediments or attached to solid substances in all the waters of Earth. Diatoms are among the most important and prolific microscopic sea organisms and serve directly or indirectly as food for many animals.
Diatoms are much more common than golden-brown algae and consist of many types of plankton found in the ocean. Instead of a cell wall, diatoms are encased by a silica shell, known as a frustule, that varies in shape and structure depending on the species. Golden-brown algae, though fewer in number, rival the productivity of diatoms in the ocean.