http://www.the-jena-experiment.de/The Jena Experiment is one of the longest-running biodiversity experiments in Europe. We have been studying biodiversity effects in experimental grassland communities for more than 10 years. This coordinated investigation of above-ground and below-ground consumers and processes, includes a full quantification of the most important element cycles, which will be used to unravel the mechanisms underlying biodiversity effects on ecosystem functioning.
Jena Experiment deutsch:
https://www.youtube.com/watch?v=yQSe6a2LBYM