Ch. 20 Flashcards Preview

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Flashcards in Ch. 20 Deck (16):
1

predation+ ex.

the predator eats all or part of an individual of another species ex.carnivores, herbivores

2

Competition+ ex.(interspecific)

two or more species use the same limited resource ex. lions and hyenas both prey on zebra

3

mutualism+ ex.

the two organisms benefit from each other ex. animals that carry pollen and flowers

4

parasitism+ ex.

one organism is the host and the other, the parasite- doesn't result in immediate death, parasite feeds on host ex. aphids, lice, leeches

5

5 types of species interactions

predation, competition, parasitism,
mutualism, commensalism

6

community stability

tendency of a community to maintain relatively constant conditions

7

competitive exclusion

one species out cuts another species

8

character displacement +ex.

evolution of niche differences (reduces niche overlap) ex. lion and cheetah

9

resource partitioning+ex.

when species only uses a part of the resources available ex.birds hunt for insects in different parts of the tree

10

commensalism+ ex.

when one species benefits and the other is not affected ex. whale and barnacles, egrets and buffalo

11

why tropical ecosystems have higher species richness

Stable climate
Not disrupted by ice age
More energy

12

primary succession+ex.

growth in an area that has not supported life ex. rocks, volcanoes

13

secondary compounds+ex.

chemicals that protect the plant ex. bad taste, poisonous

14

secondary succession

growth in an area that has been disturbed(fire,etc.)

15

lichens

break down rocks and help create soil

16

species-area effect

larger areas tend to support more species