Whole-Tree Logging and Biodiversity (IMAGE) Michigan Technological University Caption Michigan Tech silviculturalists expected that plant diversity would go down in logging stands where whole trees had been removed, perhaps because the tops and branches leave some nitrogen behind to fertilize the soil. That's not what happened; there was no difference between whole-tree logging and leaving material behind. Credit Sarah Bird/Michigan Tech Usage Restrictions please credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.