G diatoms greek diatomos cut in two centric

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Unformatted text preview: a Habitat: mostly marine e.g. diatoms (Greek: diatomos = cut in two): Centric forms/pennate forms FOR FILTERING WINE/POOLS; AREAS OF Diatomacious earth USEDINTO OCEAN PITS, OVER GEOLOGIC TIME,MARINE DIATOMS FALL IT REACHES THE SURFACE, HARVESTED AND SOLD AT HARDWARE STORE SILICA CELL WALLS= SORTA LIKE GLASS MOST NOT MOTILE, SOME WILL GLIDE GLIDING: NEEDS CONTACT WITH SUBSTRATE; CAN BE AIR WATER OR OTHER CELLS NEEDS SOMETHING TO PUSH OFF OF. (DIFF FROM FLAGELLA) Diatoms SCANNING ELEC. MICROGRPH f Diatom asexual replication WHEN THEY DIVIDE, THEY SPLIT INTO 2 IDENTICAL INDIV. THEY ALWAYS MAKE NEW HALF OF THE CELL WALL INSIDE THE OLD ONE ONLY A FIXED NUMBER OF TIMES THAT IT CAN DO IT (CELL WALL GETS SMALLER EACH TIME) USUALLY ABOUT 30 CYCLES SEXUAL CYCLE IS TRIGGERED AFTER 30 CYCLES MEIOSIS OCCURS, and NEW GENETIC INDIV RESULTS SEXUAL CLOCK EVERY 30 CYCLES HEMICELLS! Pyrophyta (unicellular) (Greek: pyrrhos = flame color) e.g. dinoflagellates (Greek: dinein = to whirl) Gymnodinium sp Habitat: aquatic/marine MOSTLY MARINE Parallytic shellfish poisoning RED TIDE ALEXANDIRUM SAID TO BE ARMOURED WITH PLATES W/O PLATES= NAKED DINOFLAGELLATES HAVE TWO FLAGELLA HAVE TRANSVERSE (TWIRL) FLAGELLUM AND LONGITUDINAL (WAVE PATTERN) FLAGELLUM COAST OF CALIFORNIA AFFECTED BY ALGAL BLOOM MASS OD RED TIDE (DINOFLAGELLATES) ALGAL BLOOM: MASSIVE PROLIFERATION OF ALAGE DURING RED TIDE ALGAL BLOOD, SAXOTOXIN IS PRODUCED AND THE FILTERFEEDERS WHO EAT DINOFLAGELLATES AND THE SAXOTOXIN BECOMES CONCENTRATED IN THE TISSUE OF THE CLAM/MUSSLE, DOESNT HARM CLAM IF HUMAN EATS CLAM, IT CAUSES PARALYT...
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This document was uploaded on 02/25/2014 for the course MICROBIOLO 101 at San Jose State University .

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