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Notes #18: SPECIES INTERACTIONS Part 2
PP 403-404
Warm up 3-31:•Using: + = good & - = bad explain which types of symbiosis correspond to:
• (+/+) (+/-) (+/0)
PREDATION (+/-)
one species eats another species
predator: eater and prey: eaten
Types: carnivores, herbivores
• cyclic in nature – ↑ in prey leads to ↑ in predators (vice versa)
• Adaptations in prey for defense against predators
PREY: SEA URCHINS
PREDATOR: SEA
STARS
RESPONSES TO PREDATION
camouflage: Cryptic coloration disguises an animal so it’s less visible to predators or prey
warning coloration: intended not to camouflage an organism but to make it more noticeable
- Bright coloring, scent, or taste to warn
potential aggressors
mimicry: physical (or behavioral resemblance) of one species to another
1. natural selection of a second moth species
favors moths who look like the bad tasting
species (bright colors)
2. color patterns may be similar
alluring coloration: animals are colored so a predator's attention is drawn to a non-vital part of the prey's body
Species Interactions Plant Prey Adaptations
-adaptations work towards protecting the plant from being eaten
Ex/ Physical Defenses – thorns, spines,
sticky hairs and tough leavesChemical Defense – poisonous, irritating or bad tasting
Secondary Compounds – chemicals that are a byproduct of the plants metabolismEx/ Strychnine, Capsacian & Nicotine
HomeworkTurn in Notebook (1 pile)
Turn in Warm-ups (2nd Pile) 3/5/14 - 3/31/14
Response to Predation
Trifold Vocab: • Interspecific
Competition• Intraspecific
Competition• Mutualism• Commensalism
• Symbiosis• Species Richness• Species Evenness• Primary Species• Pioneer Species