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Flashcards in Keywords Deck (20)
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1

Ecoystsem

Community of biotic and abiotic components that interact with one another through complex interrelationships

2

Biome

Global scale ecosytsem

3

Adaptations

The way that plants and animals evolve in order to cope with certain conditions

4

Abiotic components

Non-living features of an ecosystem (water, sunlight)

5

Biotic components

Living features of an ecosystem (plants, animals)

6

Producer

Organisms that obtain their energy from a primary source like the sun

7

Consumer

Organisms that obtain their energy and nutrients from eating other organisms

8

Food chain

A single line of links between different organisms that depend on each other as a source of food

9

Decomposer

An organism like bacteria that break down dead tissue, which effectively recycles nutrients back into the environment

10

Food web

A complex hierarchy of plants and animals that rely on each other for energy and nutients

11

Nutrient cycling

A set of processes whereby organisms extract nutrients necessary for growth from soil and water, before passing them on through the food chain, and ultimately back to the soil and water

12

Scavengers

Organisms that consume dead animals or plants

13

Example of small-scale ecosystem

Freshwater pond

14

Food chain in freshwater pond

Detritus -> midge larva -> great diving beetle -> fish -> heron

15

Biomass

All living things in an ecosystem

16

Litter

Dead plant material that has fallen to the ground

17

Yellowstone national park - what happened

1- bears/ wolves killed for safety
2- deers increased
3- vegetation limited
4- wolves reintroduced
5- reduce population of deer + elk (20,000 to 10,000 in 8 years)
6 - vegetations regenerate (trees got 5x bigger in 6 years)
7- stabilised river banks
8- less erosion (habitats)

18

Give 2 negatives of Yellowstone Park

1- wolves and bears still pose a threat to humans as they associate public places with food
2- not sustainable - when hungry, elk and deer still risk going into areas threatened by wolves -> willow tree is not regenerating

19

How does a food web show that different parts of the ecoystem are linked together?

Food web shows the interrelationsips that exist between between producers, consumers and decomposers to suggest the movement and transfer of energy throughout the complex hierarchy

20

xerophytes

plants that are able to survive in very dry conditions through adaptation