biomas and food security

Question 1

what does a pyramid of biomass do

Answer 1

indicates how much biomass is transferred between trophic levels.

Question 2

draw the pyramid of biomass

Answer 2

….

Question 3

how can you calculate percentage absorbed by the next level (in the pyramid of biomass)

Answer 3

absorbed % = biomass at 2nd level
——————— X 100
biomass at 1st level

Question 4

what is food security

Answer 4

changing diets & growing environments, fuel & energy prices, cost Of farming, and conflicts.

Farmers are trying to farm more efficiently: increasing biomass input while reducing wasted biomass.

Question 5

what is sustainable fishing

Answer 5

ensures fish are not caught faster than they can breed. So populations remain constant e.g. by using nets with large holes so juvenile (young) fish an escape and breed.