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Department
Interdisciplinary Science
Course
ISCI 1001
Professor
John Buschek
Semester
Fall

Description
ISCI 1001 A Oct 10 2013 Parasitism ­Endo Parasite: lives in you ­Ecto Parasite: lives on you ­Macro Parasite: ticks, worms, even plants. E.g. mistletoe: hemi­parasite does  photosynthesis but takes nutrients and water from other plants ­Micro Parasite: bacterium, fungus, etc. Herbivory ­Plant parasitism: things eating plants Social Parasites ­Need a host to complete their lifestyle ­Cuckoo: lays eggs in another bird’s nests ­Toxoplasma Gondii ­Single­celled protist ­Will infect any animal, human, etc. ­Rarely shows symptoms if host is healthy ­Can be dangerous if host has weak immune system ­Can only sexually reproduce in the intestines of cats ­If it gets into mice, mice become aggressive and attack cats ­Parasite wants to get into intestines of cats ­May be a connection between toxoplasma gondii and schizophrenia  Mutualism (+,+) ­Pollination (animal, plant) (food, producing) ­Mychorrhizae: fungus/plants (roots) ­“Probiotics” ­Cells (eukaryotic)  ­Mitochondria houses the breakdown of materials ­Close contact ­> symbiosis Commensalism (+,o) ­Hole in a tree for a bird: does not hurt tree, does not help bird ­Shade tree helps another plant sprout because shaded ground, is moister Community Structure ­Strongly affected by feeding relationship Producer­>Herbivore(1*consumer)­>Carnivore(2*)­>Top Carnivore(3*) Autotroph       Omnivores                Heterotroph   ­Detritivores consume everything that dies, falls off of, or comes out of higher levels ­Trophic Pyramid with biomass, # of organisms, or energy content at bottom (think NRB) ­About a 90% decrease as material moves up each level ­Food chain ­> multiple food chains ­> food web West Coast of Northern US (Things that influence community structures) ­Study of intertidal zone ­Inhabited by 16 invertebrate species ­Including 1 sea star specie and 1 mussel specie ­Removed all the sea stars (15 species left) ­Eventually only 8 species (including mussel species) remained ­Ideas: ­7 species depended on the sea star to s
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