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 speciespredator: eater and prey: eatenTypes: 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

moment of truth defenses: action by prey just before death that is unexpected by predator

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 PredationTrifold Vocab:

• Interspecific Competition

• Intraspecific Competition

• Mutualism• Commensalism

• Symbiosis• Species Richness• Species Evenness• Primary Species• Pioneer Species

Warm-up 4/1What is resource/niche partitioning?What is competitive exclusion?