Yes, number of aphids goes up, number of butterflies goes down. Conclusion: no net change.
The study has been criticised by German scientists for this reason. With rather drastic words, e.g. "I don't understand how a paper with such obvious weaknesses can pass through the peer reviewing process" and "This paper is not a good example for scientific best practices".
The study has been criticised by German scientists for this reason. With rather drastic words, e.g. "I don't understand how a paper with such obvious weaknesses can pass through the peer reviewing process" and "This paper is not a good example for scientific best practices".