Johnsson, Kristina,
The black woodpecker Dryocopus martius as a keystone species in forest /
Kristina Johnsson.
- 144 pages : illustrations, maps ; 24m.
Thesis consists of summary chapter and seven articles or submitted manuscripts
Includes bibliographical references.
Hadiah
Black woodpecker--Sweden.
Cavity-nesting birds--Ecology--Sweden.
Forest ecology--Sweden.