Epixylic, forest-interior bryophytes in young stands
The reduction of coarse, dead wood is considered to be the biggest threat to flora and fauna in boreal forests. Extensive harvest of logging residues would increase this reduction even more. However, the role of dead wood created at final felling for boreal, epixylic species is still largely unclear...
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| Formato: | Second cycle, A1E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2011
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| Acceso en línea: | https://stud.epsilon.slu.se/2323/ |
| Sumario: | The reduction of coarse, dead wood is considered to be the biggest threat to flora and fauna
in boreal forests. Extensive harvest of logging residues would increase this reduction even
more. However, the role of dead wood created at final felling for boreal, epixylic species is
still largely unclear. It is therefore of interest to examine whether epixylic species inhabit the
dead wood in young, boreal stands, especially species considered to be confined to forests in
late successional stages.
The aim of this study was to investigate whether forest-interior species in fact can inhabit
early-successional forests arisen after logging. The study was conducted in young stands
bordering dead wood rich woodland key habitats. All CWD and totally 202 FWD in five plots
were searched for the presence and abundance of the study species, and local environmental
variables, propagule sources and distance to bordering woodland key habitats were recorded.
The effects of the variables on the presence and abundance of five forest-interior epixylic
bryophytes, (Anastrophyllum hellerianum, Buxbaumia viridis, Herzogiella seligeri,
Lophocolea heterophylla and Nowellia curvifolia) were analysed. For comparison epixylic
bryophytes and lichens considered to be open-forest species and generalist species was also
included.
Predictive models could be built for the abundance of A. hellerianum and H. seligeri and for
the occurrence of all forest-interior species (see above) but N. curvifolia. Predictive models
were also built for many of the comparison species both concerning occurrence and
abundance.
The study showed that forest-interior species can inhabit early-successional forests arisen
after logging. However, it was concluded that all CWD in young stands immediately
surrounding woodland key habitats should be excluded from biofuel harvest because species
specific guidelines are not useful for the forest industry.
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