Populations and sustainability chp 24 NOT FINISHED Flashcards
1
Q
What is meant by conservation
A
- maintenance of biodiversity through human action or management
2
Q
what does conservation involve
A
- management of ecosystems so that the natural resources in them can be used without running out (management of a forest for sustainable timber)
- also includes reclamation
3
Q
what is reclamation
A
- process of restoring ecosystems that have been damaged/destroyed
- also involves controlled burning to halt succession and increase biodiversity
4
Q
what is preservation
A
- protection of an area by restricting/banning human interference, so that ecosystems are kept original
5
Q
when would preservation be used
A
- preserving resources that can be easily damaged/destroyed by disturbances
- fossils
- ruins
- fragile ecosystems (virgin caves)
6
Q
how is conservation economically important
A
- conserved areas provide resources
^stop there degradation/depletion - e.g. rainforest provides medicine, food, wood, clothes
7
Q
How is conservation socially important
A
- people enjoy natural beauty or wild ecosystems
- used for relaxation and exercise (walking, climbing, hiking)
8
Q
how is conservation ethically important
A
- all organisms have a right to exist, play important role in ecosystem
- moral responsibility for future generations to experience ecosystems
9
Q
what occurs in stage one of the predator-prey cycle
A
- an increase in prey population provides more food for predators
^allows more to survive and reproduce
10
Q
what occurs in stage 2 of the predator-prey cycle
A
- increased predator populations eat prey
^causes decline in prey populations
11
Q
what is stage 3 of the predator-prey cycle
A
- reduced prey population no longer supports large predator population
^intra-specific competition for food increases
^results in predator populations falling
12
Q
what occurs in stage 4 of the predator-prey cycle
A
- reduced predator population results in less prey population being killed
^more prey organisms survive and reproduce - cycle begins anew
13
Q
what is the problem with the predator-prey cycle
A
- others factors can affect predagtor and prey populations such as availability of food present for prey
- populations of other prey animals
- abiotic factors (fluctuations in seasons)
- disease
