Scientists recorded the area of a coastal marsh and the number of species living there.
| Year | 1996 | 2002 | 2008 | 2014 | 2020 |
|---|---|---|---|---|---|
| Area of coastal marsh in ha | 70 | 54 | 38 | 46 | 54 |
| Number of species | 28 | 23 | 15 | 19 | 22 |
Which statement about the survey is supported by the data?
The marsh area was greatest in 2014, when 19 species were recorded.
The decrease in marsh area from 1996 to 2002 was greater than the decrease from 2002 to 2008.
The marsh covered the same area in 2002 and 2020, but one fewer species was recorded in 2020.
The number of species was the same in 2008 and 2020 because both surveys followed a loss of marsh.
109 exam-style questions on OCR GCSE Biology 6.1 Monitoring and maintaining the environment, covering 6.1.1 Field investigation of distribution and abundance, 6.1.2 Human interactions and biodiversity, 6.1.3 Maintaining biodiversity, and 6.1.4 Environmental change and distribution of organisms. Each one has a worked solution and a mark scheme showing where the marks go.