Over the past 30 years, there has been a global decrease in the number of insects on land, but there is ongoing recovery in fresh waters.
An analysis of long-term insect abundance studies shows that the number of terrestrial insects in the world is declining. On average, the global decline is 0.92% per year, which corresponds to approximately 24% over 30 years. At the same time, the number of insects living in fresh water increases annually by an average of 1.08%. Despite the average values, the trends on different continents vary greatly, and in areas where human exposure is minimized, trends are less pronounced. These are the results of the largest study to date on the change in the number of insects, including 1,676 research points around the world, published in the journal Science. The study was conducted by scientists from the German Center for Integrative Biodiversity Research (iDiv), the University of Leipzig (UL), and the A.N. Severtsov Institute of Ecology and Evolution (RAS), Moscow State University and several other organizations. It fills key gaps in knowledge in the context of the widely discussed issue of reducing insect numbers.
07
May
2020