Practise defining biodiversity through ecosystem, species and genetic diversity, then use richness, evenness and Simpson’s reciprocal index to compare communities.
The tundra ecosystem in Finnish Lapland has a short growing season and a mean temperature of . It is also naturally grazed by herbivores such as reindeer (Rangifer tarandus). Different quadrats were set up to include and exclude the reindeer in both normal and warmed temperatures. Open-topped warming chambers were used to heat both the soil and air in the warmed quadrats. The graph shows the changes in plant richness over five years.
State what is meant by species richness.