ecology practice test q

Question 1

Community with most amount of soil nitrogen

Answer 1

tundra

Question 2

Community with least amount of soil nitrogen

Answer 2

Tropical forest

Question 3

Why is marine productivity high adjacent to coastal zones of continents

Answer 3

high levels of mixing in shallow water from winds and currents

Question 4

Combined CO2 and CH4 levels in the earths atmosphere in 2023 is approximately:

Answer 4

415 ppm (CH4 is only in ppb so this is basically all CO2)

Question 5

Global biomass ratio of humans to all wild mammals and what are their biomasses

Answer 5

10:1
0.06 Gt C for humans
0.007 Gt C for wild mammals

Question 6

Cuurent amount of low elevation old growth in BC that is protected

Answer 6

3%

Question 7

Current amount of mid elevation old growth in BC thats protected

Answer 7

11%

Question 8

Major threat to native species on a small island

Answer 8

Invasive species

Question 9

what reduces availability of carbonate ions for skeleton production in lower trophic levels

Answer 9

ocean acidification

Question 10

A species is considered vulnerable when:

Answer 10

it has 20% chance of dissapearing in 10 years