Effects of management on aquatic tree-hole communities in temperate forests are mediated by detritus amount and water chemistry

The Journal of Animal Ecology
Martin M GossnerJana S Petermann

Abstract

Arthropod communities in water-filled tree holes may be sensitive to impacts of forest management, for example via changes in environmental conditions such as resource input. We hypothesized that increasing forest management intensity (ForMI) negatively affects arthropod abundance and richness and shifts community composition and trophic structure of tree hole communities. We predicted that this shift is caused by reduced habitat and resource availability at the forest stand scale as well as reduced tree hole size, detritus amount and changed water chemistry at the tree holes scale. We mapped 910 water-filled tree holes in two regions in Germany and studied 199 tree hole inhabiting arthropod communities. We found that increasing ForMI indeed significantly reduced arthropod abundance and richness in water-filled tree holes. The most important indirect effects of management intensity on tree hole community structure were the reduced amounts of detritus for the tree hole inhabiting organisms and changed water chemistry at the tree hole scale, both of which seem to act as a habitat filter. Although habitat availability at the forest stand scale decreased with increasing management intensity, this unexpectedly increased local arthro...Continue Reading

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Citations

May 18, 2016·PloS One·Jana S PetermannMartin M Gossner
Jun 21, 2019·Scientific Reports·Willem van HoeselSwen C Renner
Feb 8, 2020·Nature Communications·Thomas ScheuerlThomas Bell
Apr 9, 2021·Journal of Nematology·Alexandre Macedo AlmeidaRicardo Moreira Souza

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