BIO 2137 Lecture Notes - Lecture 5: Fucus Vesiculosus, Intertidal Zone, Ulvophyceae
17 Jul 2014
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Document Summary
Keywords: multicell algae: cambrian, red, green, brown. Brown algae: chlorophyll type, accessory pigments, energy reserve, cell wall, flagella, structure: blade, stipe, holdfast, laminarin life cycle, ecological importance: bladder wrack, st. andrews nb, economic importance: algin, fucan. Red algae: chlorophyll type, accessory pigments, energy reserve, cell wall, flagella, habitat: corallines, east coast, phycobilisomes, economic importance. Laminaria life cycle: alternation of generations, sporophyte (multi, 2n, diploid) --> meiosis spores --> gametophyte (multi, n, haploid --> sporophyte (multi, 2n, diploid, diploid advantage: genetic variation, another set of chromsomes if one is defective. Ecological importance: major algae of intertidale zone, kelp forests dominate marine coastal ecosystems (pucuss in east, tree like algae in west, bladder wrack, st. andrews nb, provide habitat and primary production. Economic uses: algin: high weight polysaccaharide, fucans: sulfated polysaccharides (anti-cancer and anti thrombins, used as thickner in paints, ice cream, cosmetics in 300 products, medicinal: food supplements, antivirals from artic algae. Red algae: probable cyanobacteria ancestor, used in microbio.
