Farming in the UK needs nature reserves to work. The majority of biodiversity is conserved in protected landscapes, enabling conventional agriculture to have the dominant hand in the undesignated areas. However, increasing amounts of evidence are undermining this strategy. We are used to bad news for species in certain farmscapes, but a recently published survey from 88 nature reserves across Germany has revealed some shocking declines. The august Krefeld Entomological Society organised a total of 15249 trapping days between 1989 and 2014. Their results showed average weights of insects caught to have declined from an average of over 9g per day at the start to about 1g per day by 2014. This is a decline in the biomass of flying insects in excess of 80% in just 27 years, a statistic that also confirms the lack of bug splatter on the windscreens of our cars that is also causing concerns in the UK. Surveys carried out by the Game and Wildlife Conservation Trust and, over an even longer period of time, by the Rothamsted scientists, show declines of around 40% in England in the ‘wider countryside’.
What if nature reserves don’t work? Dealing with a situation of decreasing biodiversity

The Farmer
