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Diversity of vascular plants in Swedish forests.: Comparison among and within forest, partially cut down and clear cut forest communities.
Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
2010 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 10 poäng / 15 hpOppgave
Abstract [en]

Swedish forests are mostly used for timber harvesting and 96 % of this harvesting is made by clear cutting while only 4 % is effected through other methods such as single tree harvesting. All species are not affected by forestry to same magnitude. Some specifically generalists are not affected at all. Hence, this study, had its aim to find out vascular plant species that persist, disappear or colonize other species as a result of anthropogenic disturbances in different production forests, so as to determine not only if canopy openness affects the species distribution but also the magnitude of the effects. I examined 10 different forest localities during May and June 2008. Three of these localities were made up of clear cut forest plots, 3 with partially cut down forest plots and 4 with undisturbed production forest plots. Species composition and diversity were then compared between these plots. A total of 34 different species were found. Statistical Analysis was made on how well the species in the partially cut down forest plots fitted into the undisturbed forest group as well as comparing this results with results of how counterpart species in the clear cut forest plots fitted into the undisturbed forest groups. These results showed that there was no significant difference, ANOVA values of P = 0.839, 0.602 and 0.564 respectively among the species composition between the forest, partially cut down and clear cut forest groups between the forest, partially cut down and clear cut forest plots. However, among the 54 species found in all study plots, 11 were common between the forest and partially logged sites whereas only Carex sp in the clear cut forest was common to those in the forest plots implying that canopy openness did not affect the total species number but had an effect in species composition. Clear cutting seems to kill off everything but trees and generalists. Hence, resiliency of vegetation should be increased by management practices that ensure the maintenance of prior species.

sted, utgiver, år, opplag, sider
2010. , s. 24
Emneord [en]
Forest management, boreal forest, biodiversity, disturbance, clear cutting and partially cut down forest
HSV kategori
Identifikatorer
URN: urn:nbn:se:hh:diva-6063OAI: oai:DiVA.org:hh-6063DiVA, id: diva2:354627
Uppsök
Agriculture, Veterinary Medicine, Forestry
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Examiner
Tilgjengelig fra: 2010-10-22 Laget: 2010-10-04 Sist oppdatert: 2010-11-02bibliografisk kontrollert

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