7.4 Trophic levels in an ecosystem (biology only)

EasyMediumHard
12345678910
Question 2
Easy

Figure 1 shows how the mean biomass of primary consumers (sea urchins) in a temperate kelp forest ecosystem changed between 1980 and 2020.

Figure 1: Mean biomass of primary consumers

Calculate the percentage decrease in the biomass of primary consumers between 1985 and 2005.

Give your answer to the nearest whole number.

[3]

7.4 Trophic levels in an ecosystem (biology only) Questions

  1. GCSE
  2. /Biology
  3. /7.4 Trophic levels in an ecosystem (biology only)