Essays about: "epiphytic lichens"

Showing result 16 - 20 of 20 essays containing the words epiphytic lichens.

  1. 16. Epiphytic lichens associated with different traffic intensities along the highway E4

    University essay from SLU/Dept. of Ecology

    Author : Chiho Okuyama; [2011]
    Keywords : Bioindicator; Air pollution; Species richness; Sensitivity; Recolonisation; Disappearance; Forest ecosystem;

    Abstract : Inventories of epiphytic lichens on Scots pine (Pinus sylvestris) were conducted at three sites in east central Sweden: along the newly build motorway (Road E4), along the old road (Road 600) and in a reference site, to compare the effects of traffic pollution on lichen diversities. At each site, species richness, lichen mean sensitivity value (MK), air quality index of the forest stand/sample plot (LKI) and nitrogen impact value (N) were calculated and it was tested if there was any difference between the sites. READ MORE

  3. 17. Spatial pattern of occurrence of eleven epiphytic lichen species in a heterogeneous landscape

    University essay from Institutionen för fysik, kemi och biologi; Tekniska högskolan

    Author : Usman Haider Muhammadi; [2011]
    Keywords : Key words: old oaks; spatial scales; spatial pattern; red-listed lichens; oak density; species occurrence; richness;

    Abstract : Oaks (Quercus robur) are an important substrate for many epiphytic lichens, and with increasing age the bark of oaks becomes suitable for red-listed species. These species may respond to environmental and landscape factors differently, and at different spatial scales. READ MORE

  4. 18. Biltrafikens påverkan på lavfloran : en studie med epifytiska lavar som bioindikatorer av trafikens luftföroreningar längs E4:an norr om Gävle

    University essay from SLU/Dept. of Ecology

    Author : Daniel Segerlind; [2009]
    Keywords : lavar; bioindikator; epifytiska lavar; luftföroreningar;

    Abstract : Många forskare har sett att luftens föroreningar ackumuleras i bålen hos epifytiska lavar och påverkar dem. Detta gör att utifrån vilka lavar som lever i ett område går det att dra slutsatser om hur påverkad miljön är av luftföroreningar. READ MORE

  5. 19. Skogseldens påverkan på epifytiska trädlavar på tall i relation till brandintensiteten

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Teresa Jonsson; [2006]
    Keywords : skogsbrand; lavar; tall; naturvård;

    Abstract : Not much is today known about how epiphytic lichens are effected by fire. A considerable part of the fires in Sweden today are prescribed fires for the purpose of environmental conservation. How these fires affect lichens is largely unknown. READ MORE

  6. 20. Using a spatially precise approach to analyse the occurrence of Usnea longissima in relation to present and past stand structure : a case study in boreal Scandinavia

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Torbjörn Josefsson; [2004]
    Keywords : stand history; nature conservation; adaptive forest management;

    Abstract : To maintain biodiversity in managed forests, long-term trends in forest structure and ecological processes must be understood since these have a decisive influence on the distribution of many forest species, especially epiphytic lichens. To enhance the understanding of the complex occurrence of Usnea longissima Ash. READ MORE