Categories: All - ecology - habitat - algae - taxonomy

by adibah kassim 11 years ago

1341

ALGAE simple "aquatic plants"

Algae are simple, primarily aquatic organisms that can perform photosynthesis. They exhibit both sexual and asexual reproduction methods, including binary fission, spore formation, and fragmentation.

ALGAE simple

ALGAE simple "aquatic plants"

taxonomy

euglenophyta
pyrrophyta (dinoflagellates)
chrysophyta (diatoms)
phaephyta (brown)
rhodophyta (red)
chlorophyta (green)

classification based on

life history patterns
reproductive structures
morphology of cells
chlorophyll and pigments
flagella number and location
cell wall

distribution of algae

terrestrial
endosymbionts in protozoa, worms, corals, fungi (lichen)
moist rocks, trees, soil
primarily aquatic
a. planktonic- suspended in aqueous environment b. benthic- attached and living on the bottom of water c. neustonic- at water-atmosphere interface

motility of algae

a. single flagella- Euglena b. 2 or 4 polar flagella- Chlorophyta c. 2 flagella of different length and point of insertion- Dinoflagellates
due to flagella only during sexual reproduction

habitat

a. aquatic habitat like fresh water b. moist soils and artificial aquatic habitat c. few in dry soils d. acidic habitat

algal ecology

primary producers of the ocean
macroscopic form
secondary products
human food
seaweed

algal reproduction

sexual reproduction
asexual reproduction
binary fission
spores
fragmentation

classification of algae

Subtopic

cell walls of algae

sometime chitin or silica or no cell wall
strengthened with calcium carbonate
cellulose fibrils but usually modified by addition of polysaccharide

characteristics

a. lack of vascular conducting system b. simple reproductive structure, lack true leaves roots, flowers
photoautotrophic
eucaryotic+chlorophyll and pigments