Search for dissertations about: "Jörg Stephan"

Found 1 swedish dissertation containing the words Jörg Stephan.

2. 1. Behavioural mechanisms behind aggregation in a tritrophic perspective

   Author : Jörg Stephan; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Abstract : Gregarious organisms need to handle the trade-off between positive effects of group living and increasing food competition. The gregarious Phratora vulgatissima, a specialist leaf beetle on willow in Europe and Asia, frequently reaches outbreak densities in natural stands and short rotation coppices. READ MORE