This preview shows page 1. Sign up to view the full content.
Unformatted text preview: Phytoplankton are the plant
like organisms of the sea that carry out photosynthesis and float in the upper areas of the world’s oceans. Most of the ocean is Most of the ocean is too deep for plants to attach to the bottom like this Giant Kelp off the coast of California. Therefore, most of the Therefore, most of the photosynthesis is carried out by microscopic single celled organisms or chains of single cells. These organisms often These organisms often have long projections to increase their surface area or oils to keep them in the photic zone. Diatoms are dominant Diatoms are dominant members of the phytoplankton that can be caught in a net. They are especially They are especially common in temperate , coastal and polar regions. They have sculptured They have sculptured shells, or frustules, made of silica. Diatoms can come in a variety of shapes. More Diatom Shapes
More Diatom Shapes Life Cycle of a Diatom
Life Cycle of a Diatom Fish Killer
Some diatoms, like this one can kill fish when found in large numbers The glasslike The glasslike projections cause mucus to build up in the fish’s gill which can lead to the fish's death. Dinoflagellates
Dinoflagellates Dinoflagellates are found Dinoflagellates are found throughout the world’s oceans, but tend to prefer warmer areas. Given nutrients, dinoflagellates can bloom or explosively grow to huge numbers sometimes causing RED TIDES Dinoflagellates:
red tides Florida red tide organism:
Gymnodinium breve Aro und 6 0 s p e c ie s A ro
o f Dino fla g e lla te s a re kno wn to c a us e re d tid e s .
A fe w s p e c ie s p ro d uc e p o is o ns th a t a re a m o ng th e m o s t p o we rful na tura l to xins kno wn. During a re d tid e , During
d ino fla g e lla te s m a y p o is o n th e wa te rs , turning th e s urfa c e into a s e a o f d e a d fis h .
R e d tid e s c a n a ls o th re a te n h um a n h e a lth . Mus s e ls , c la m s Mus
a nd o th e r b iva lve s s to re th e to xins a s th e y filte r fe e d .
P e o p le wh o e a t th e s h e llfis h c a n g e t Paralytic
Poisoning. Vic tim s s uffe r Vic
num b ne s s a nd ting ling , lo s s o f b a la nc e , s lurre d s p e e c h , a nd in e xtre m e c a s e s , p a ra ly s is a nd d e a th ! Symbiotic Dinoflagellates
Some dinoflagellates like Zooxanthellae, are symbiotic with corals or jellyfish. Coccolithophorids
Coccolithophorids Coccolithophorids are Coccolithophorids are common members of the nanoplankton. Most are too small to be taken in a regular plankton net. Though found in Though found in coastal waters, they do best in open oceans where they often far outnumber all other types of phytoplankton. These single celled These single celled organisms are covered by plates made of calcium carbonate. Silicoflagellates
Silicoflagellates Because of there small Because of there small size, very little is known about silicoflagellates except that they can be very important to the primary production in the world’s oceans. ...
View Full Document