Effects of accelerated succession on the saproxylic beetle community

Background/Question/Methods

Ecosystems are constantly changing, due to natural or anthropogenic disturbances. The changes observed in these communities after a disturbance are known as succession.  This phenomenon has been studied since the 1900’s as an important driver for understanding ecological systems. More recently, knowledge about successional processes has become important for designing successful forest management plans and understanding the effects of climate change on different ecosystems. There exist an information gap in successional knowledge for many groups, including the animal community. Most studies that exist for animal succession have focused on the vertebrate community, leaving the invertebrate community underrepresented. Understanding invertebrate response to changing environments during succession can provide valuable information on ecosystem health and rates of recovery, due to their use as bioindicators. In this study we attempt to document the response of the saproxylic beetle community to accelerated succession. Sampling sites were located in 2 stands of secondary successional hardwood forest in the western part of the station, regenerating after intensive logging practices during the 19^th century. We compared samples form 2009 and 2011 from both an accelerated succession site and an unmanaged stand of secondary forest in Pellston, Michigan. 

Results/Conclusions

Our results show an increase in the abundance of saproxylic beetles in an accelerated succession area between the two sampled years.  The non-altered recovery forest showed a decrease in the abundance of this group. Our results suggest a close relationship between plant and animal succession.  A generalized understanding of the succession process that includes information from many groups could become a very helpful tool for ecosystem management and monitoring.