Coevolution and Symbiosis Flashcards Preview

GeoSci 110 (Exam 2) > Coevolution and Symbiosis > Flashcards

Flashcards in Coevolution and Symbiosis Deck (15):
1

Pairwise Evolution

involving just two particular species

- i.e. particular plant and particular pollinator

2

Coevolution

two or more unrelated species adapting to each other

3

Diffuse Coevolution

involving multiple species

- i.e. many species of bugs pollinating many species of plants

4

Symbiosis

interaction between two different organisms living in close physical association

- i.e. commensalism, mutualism, parasitism

5

Commensalism

host is not affected

i.e. the shark and the remora; the remora pretty much follows around the shark and eats their scraps and gain a certain amount of protection but don't affect the shark at all

6

Mutualism

host benefits

- i.e. clown fish and the anemone; the clown fish isn't stung by the anemone and can live there and brings the anemone food

7

Parasitism

the host is harmed

i.e. humans and tapeworms

8

Brood Parasitism

a form of social parasitism practiced by certain birds;

one species lays their eggs in the nest of other birds causing their offspring to be raised by the host; the offspring of the brood parasite bird kills the offspring of the host

i.e. cukoos

9

Specific Parasites

only targets one host; more benign relationship for the host

10

General Parasites

targets and parasitizes many host species; very bad for the host

11

Adaptations of Parasites

- eggs develop rapidly
- young grow fast and are demanding
- destroy host eggs/nestlings
- thick shelled eggs
- destroy the host nest if eggs are recognized (mafia strategy)

12

Host Counter-Adaptations

- drive away parasites
- eject or bury eggs
- abandon the nest

13

Photosymbiosis

- dinofagellates = zooxanthellae

- mutualistic algea living in the coral tissues

- gives the color to the coral

14

Hermatypic Corals

must have zooxanthellae to survive

- zooxanthellae remove CO2 and provides oxygen, which is necessary for the coral

15

Coral Bleaching

coral expels their vital symbionts when the temperatures get too high

- zooxanthellae pigmentation results in lost color, reverting back to their stark white calcium carbonate skeletons