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Lecture

ISCI 1001 Lecture Notes - Commensalism, Pollination, Parasitism


Department
Interdisciplinary Science
Course Code
ISCI 1001
Professor
John Buschek

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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: hemi-parasite 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
-Single-celled 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)
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