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The strongest model (highlighted in bold) are considered as the characteristic scales explaining the effect of landscape and tree variables in given tables. Similarly, the minimum AIC value in the given tables also indicates the best explained model for lichens species. The sign positive/negative shows the effect of tree and land use variables at different considered scales.

The occurrence of three most frequent lichen species Cliostomum corrugatum, Chaenotheca phaeocephala, Ramalina baltica, and species richness on 213 oaks were included in the analysis. Lichen species richness varied between 0 and 7 species per tree (mean=2.14; median= 2species). The oak density was greatly varied, especially in the large scales, suggesting aggregation of oaks in part of the study area. Our result showed that probability of occurrence of Cliostomum corrugatum, Chaenotheca phaeocephala Ramalina baltica and well as species richness was positively affected by circumference that, in our target trees varied from 3.1m to 4.1m.

The occurrence of two lichens was affected by the land use variables differently. Only one species Chaenotheca phaeocephala and species richness patterns respond no effect to the land use variables. On the occurrence patterns of Cliostomum corrugatum only water showed the positive effect, but housing as expected negatively affected on the occurrence (Table 2). The occurrence of However, occurrence pattern of only one species Ramalina baltica was positively affected the by the arable field (Table 5).


Responsible for this page: Agneta Johansson
Last updated: 05/24/11