tolerance- the ability to survive and reproduce under a range of environmental circumstances
- beyond the limits of tolerance for an organism, the organism cannot survive
habitat- the general place where an organism lives
niche- full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
- physical aspects of niche- abiotic factors (nonliving) an animal requires for survival
- ex. an amphibian needs to live in moist places because it absorbs water through its skin
- biological aspects of niche- biotic factors (living) an animal requires for survival
- ex. when/how an animal reproduces, food it eats, way it obtains food
resource- any necessity of life --> such as water, nutrients, light, food, or space
- ex. plants- sunlight, water, soil
- animals- nesting space, shelter, types of food, places to feed
competitive exclusion principle- principle that states that no two species can occupy the same niche in the same habitat at the same time
- competition between species producers a winner and a loser, loser species dies out
- instead of competing, the species usally divide resources
- ex. different species of birds will eat different parts of a tree
predation- interaction in which one organism (the predator) captures and feeds on another organism
- predator - prey relationship- predators affect size of prey population, determines places prey live and feed
herbivory- interaction in which one animal (the herbivore) feeds on producers (such as plants)
- herbivore - plant relationship- herbivores affect size/distribution of plant populations, determine places it can survive and grow
keystone species- single species that is not usually abundant in a community yet exerts strong control on the structure of the community
symbiosis- organisms "living together", 3 types of symbiosis
- mutualism- both sides benefit
- commensalism- one benefits and the other is not harmed
- parasitism- one benefits and the other is harmed
Luke Pilliod is a great person
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