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Betydelsen av taggbuskar, ljus och hävd vid föryngring av ek (Quercus robur)
Linköping University, The Department of Physics, Chemistry and Biology.
2005 (Swedish)Independent thesis Advanced level (degree of Magister), 10 points / 15 hpStudent thesisAlternative title
The importance of thorny shrubs, light and grasing for regeneration of oak (Quercus robur) (English)
Abstract [en]

Many species and hence biodiversity depend on old, large oaks (Quercus robur) with hollow trunks. The populations of oak-living organisms have to migrate to a nearby old oak in order to survive the death of the host. The oak district south of Linköping, Sweden, is unique in area and the number of old oaks. It is anyway doubtful whether regeneration of oak will secure future continuity. Oaks are light-demanding and thrive in open pastures. Grazers also pose a problem, eating acorns and seedlings not protected by e.g. thorny shrubs. This is a study of regeneration of young oaks in the oak district and the influence of management, light conditions and thorny shrubs. There were less grown-up oaks up to 40 cm diameter than between 40 and 80 cm in grazed areas. The occurrence of oak seedlings was very low in dark un-grazed areas. Seedlings were much more common under than outside of oak canopies regardless of management. Ground coverage was lower at seedlings than in random plots. In grazed areas the density of seedlings was 30 times higher in thorny shrub than outside, but few seedlings were higher than 80 cm. The study showed that thorny shrubs are vital for establishment and survival of oak seedlings in grazed areas. It also showed that there is a risk of gaps in oak age distribution in the oak district. Management should spare thorny shrub and help seedling establishment outside of oak canopies, were oak seedlings are more likely to become trees.

Place, publisher, year, edition, pages
Institutionen för fysik, kemi och biologi , 2005. , 30 p.
Keyword [sv]
Bete, Ekplantor, Etablering, Föryngring, Taggbuskar, Quercus robur, Åldersfördelning, Återväxt
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-8735ISRN: LITH-IFM-EX--05/1553--SEOAI: oai:DiVA.org:liu-8735DiVA: diva2:23429
Uppsok
bio-/geovetenskap
Available from: 2007-05-16 Created: 2007-05-16

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3160c459c201fd7a2290717b28005dba60105d568a578ba8e49c51789ef2f93cd616a9f4
Type fulltextMimetype application/pdf

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The Department of Physics, Chemistry and Biology
Biological Sciences

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf