Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
7) Community ecology
Biology Revision 2
| Question | Answer |
|---|---|
| Give the definition of niche, habitat and biotic potential | Niche: Its lifestyle, how organism interat with biotic and abiotic elements of envi. Habitat: Its home, where the organism lives Biotic potential: How fast a popu. can grow if there's no biotic or abiotic limits |
| What are the 2 types of niches? | Fundamental niche: The ideal, theoretical niche Realized niche: The reality, where the niche really is |
| What is an example of niche competition? | 2 species of barnacles (Semibalanus vs. Chthamalus): Fundamental niche is the low tides but realized niche is the high tides, because the Semibalanus is bigger than the Chthamalus, its able to get the fundamental niche. |
| What is competition exclusion? | If 2 species fight for a resource, the specie that uses it more effiiently will emilimnate the other. No 2 organism with the same niche can coexist with limited resources. |
| Can 2 species with the same niche coexist with limited resources? | No, bc competition exclusion |
| Give an example of competition exclusion | The Caudatum bacteria outcompetes the Aurelia bacteria, so Caudatum is the one that uses resources most effiiently. |
| What is resource partitioning? | Some species subdivide the niche to avoid direct competition, so they'll use different aspect of the resource. |
| What is an example of resource partioning? | Take a palm tree for example, a specie would live on the top of the palm tree while the other on the bottom to avoid competition (Lizard) |
| What is character displacement? | When 2 similar species live in the same area (sympatric evolution), they tend to develop divergent morphological charateristics |
| What is an example of character displacement? | When 2 birds live on the same island, they avoid competing by specialising in different foods (end up having different beaks). |
| What is predation, give an example | Predation is the consuming of an organism by another. Usually results in cycles, so # of preys depend on # of predators. Ex: Wold and caribou |
| What is coevolution? | Predation causes the prey to develop features to increase their survival chances, and predators will develop features to continue eating them. |
| What is an example of coevolution? | Rough skinned newt and garter snake. Also Lynx and Hare (running faster and faster) |
| What are the 3 types of prey adaptation? Examples. | 1-Cryptic coloration: Blend in with environment (like canyon tree frog) 2- Chemical defense: Stings, poison, ect (like Monarch and poisonous milkweed) 3-Warning coloration: Bright colors to show that dangerous (like poison dart frog) |
| What are the 2 types of mimicry? Examples. | 1-Batesian mimicry: Harmless species looks like harmful one (Viceroy looks like Monarch) 2-Mullerian mimicry: 2 dangerous species have the same signal to show that they're dangerous (like bees and wasps with black and yellow stripes) |
| What is symbiosis? | When 2 or more speies live together in a permanent and elaborate relation |
| What are the 3 types of symbioses in nature? Examples. | 1-Mutualism: Both species benefit (Lichen: algi and fungus, expecker and buffalo) 2-Commensalism: One organism benefits, no effects on other (like mites on human skin) 3-Parasitism: One is harmed, other benefits (like meningeal parasite, endoparasites) |
| What is a keystone species? Example | Species that is essential to creating a particular ecosystem. Beavers for example |
| What is succession? | Process of recovery that communities follow after a disturbance |
| What are the 2 types of disturbance? | Primary S: Occurs in lifeless area where soil has yet to form (like land beneath glacier) Secondary S: Occurs where existing community has been distributed but organsim still remains (like land after a forest fire) |
Created by:
Malayka
Popular Ecology sets