Table of Contents
How many species of chaetoceros are there?
400 species
Chaetoceros is probably the largest genus of marine planktonic diatoms with approximately 400 species described, although many of these descriptions are no longer valid. It is often very difficult to distinguish between different Chaetoceros species.
Is chaetoceros Pennate or centric?
CENTRIC DIATOMS Chaetoceros species are euplanktonic and their characteristic linear colonial growth habit (most species) and very long, overlapping, spines are thought to minimize sinking rates. Many of those occurring in inland waters have high growth rates and develop high lipid contents (Johansen et al., 1990).
What is chaetoceros Muelleri?
Chaetoceros muelleri is one of the most extensively used microalgae in aquaculture. Chaetoceros is a rich source of both valuable ω-3 fatty acids EPA and DHA, but also cholesterol. In addition, it contains high levels of carotenoids/antioxidants such as fucoxanthin and diadinoxanthin.
Where are chaetoceros found?
Chaetoceros socialis is a cosmopolitan chain-forming species that is abundant in coastal regions from the cold waters of the Arctic to warm waters of the Mediterranean Sea or the Gulf of California (Hasle and Syvertsen, 1997).
What would we call a phytoplankton?
Phytoplankton are microscopic marine algae. Phytoplankton, also known as microalgae, are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow.
What is the classification of a diatom?
BacillariophyceaeDiatom / Scientific name
Diatoms are formally classified as belonging to the Division Chrysophyta, Class Bacillariophyceae. The Chrysophyta are algae which form endoplasmic cysts, store oils rather than starch, possess a bipartite cell wall and secrete silica at some stage of their life cycle.
Do diatoms eat algae?
They’ll scour any surface in the tank and won’t eat up live plants. Amano shrimp – these freshwater shrimp will eat brown algae and just about any other kind of algae that grows in a tank. But, they really won’t clean the glass in your tank.
What is phytoplankton in biology?
Derived from the Greek words phyto (plant) and plankton (made to wander or drift), phytoplankton are microscopic organisms that live in watery environments, both salty and fresh. Some phytoplankton are bacteria, some are protists, and most are single-celled plants.
What are the characteristics of diatom?
The diatom is unicellular, photosynthetic, free-moving, has a specialized frustule wall made of silica, has food reserves, has many different shapes, has few colors due to chlorophyll, a two-layered outer shell known as the thecae, and have both sexual and asexual reproductive cycles.
Are diatoms protozoans?
We can classify protists into four sub-groups: unicellular algae, protozoa, slime molds, and water molds. Algae are a diverse set of plant-like protists found in aquatic environments, and one type of algae are diatoms, which will be the focus of our lesson.
What is phytoplankton and examples?
Life Water. Derived from the Greek words phyto (plant) and plankton (made to wander or drift), phytoplankton are microscopic organisms that live in watery environments, both salty and fresh. Some phytoplankton are bacteria, some are protists, and most are single-celled plants.
What classification is plankton?
Scientists classify plankton in several ways, including by size, type, and how long they spend drifting. But the most basic categories divide plankton into two groups: phytoplankton (plants) and zooplankton (animals).
What are three characteristics of diatoms?
What are three characteristics of diatoms?
- They are unicellular organisms.
- They are photosynthetic.
- They have specialized cell walls called frustules made of silica.
What are the morphology of diatom?
Diatoms are single-celled organisms which secrete intricate skeletons. These may be elongate, with a bilateral plane of symmetry, or they may be round and radially symmetrical. Many diatoms are slightly asymmetrical, though they generally fall into one of these two categories.
What is Chaetoceros in biology?
Chaetoceros. Chaetoceros is primarily a marine genus, but there are also accounts of species within inland waters of the United States. It is a type of centric diatom that contains a frustrule or cell wall composed of silica that contain long, thin spins (setae). The spines connect the frustules together creating a colony of cells.
What are setae in Chaetoceros?
Chaetoceros is a centric diatom with very lightly silicified frustules. Each frustule possesses four long, thin spines, or setae. The setae link the frustules together to form colonies of several cells.
Are Chaetoceros euplanktonic or planktonic?
Chaetoceros species are euplanktonic and their characteristic linear colonial growth habit (most species) and very long, overlapping, spines are thought to minimize sinking rates. Many of those occurring in inland waters have high growth rates and develop high lipid contents ( Johansen et al., 1990 ).
What are the thorns on a Chaetoceros called?
Each frustule has four siliceous processes called mushrooms or thorns that allow them to stay together forming colonies. Chaetoceros is primarily a marine genus, but there are also accounts of species within inland waters of the United States.