6.3.2 Populations and Sustainability

Question 1

what is the carrying capacity

Answer 1

a population within an ecosystem that is not subject to anymore succession

Question 2

what is interspecific

Answer 2

competition between two different species

Question 3

what is intraspecific

Answer 3

competition between members of the same species

Question 4

what are predation adaptations

Answer 4

increase in speed and stealth

Question 5

what are prey adaptations

Answer 5

camouflage, stingers, mimicry,

Question 6

what is conservation

Answer 6

maintaining or management of nature to protect species/habitat

Question 7

what is preservation

Answer 7

leaves the environment not to be used by humans

Question 8

conservation economic reasons

Answer 8

ecotourism
potential for future medicine

Question 9

conservation social reasons

Answer 9

aesthetic
stop the impact of deforestation

Question 10

conservation ethical reasons

Answer 10

preserve biodiversity
supports indigenous species
stops extinction

Question 11

aims in sustainability

Answer 11

to preserve the environment and ensure that resources are available for future generations

allows less economically advanced countries to catch up by using their natural resources

Question 12

what is coppicing

Answer 12

when trunks are cut close to the ground so that several new shoots will grow from the cut surface

repeated after chosen time and protect young shoots from grazers

Question 13

pros of coppicing

Answer 13

new stems grow more rapidly
life of tree expands
provides variety of light levels
maintains biodiversity
prevent soil erosion
maintains soil quality
prevents succession

Question 14

what is selective felling

Answer 14

cutting down of selected mature trees in a forest

allows other trees to grow to maturity and also leaves enough for habitats

Question 15

what is rotational felling

Answer 15

planting a site then felling the trees when they have reached maturity
takes 8-20 years

Question 16

what is strip felling

Answer 16

cutting down of selected mature trees in a forest in a strip

allows other trees to grow to maturity and also leaves enough habitat for animals

Question 17

Galapagos island

Answer 17

habitat destruction for buildings and roads
deforestation for farming
increase in boats
more pollution
overfishing
competition by introduced species
introduction of new pathogen

Question 18

Antarctica

Answer 18

overfishing and whaling
waste must be taken when you leave
boats cant dump their waste into the ocean

Question 19

Snowdonia and lake districts

Answer 19

.visitors encouraged to take paths
litter to be put in bins
speed limits on boats

Question 20

controlling human impact

Answer 20

park rangers
limiting human access
stricter control on immigration and introduction of animals