Essays about: "epiphytic lichens"

Showing result 11 - 15 of 20 essays containing the words epiphytic lichens.

  1. 11. Water storage in the lichen genus Usnea in Sweden and Norway : Can morphological and water storage traits explain the distribution and ecology of epiphytic species?

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Amanda Eriksson; [2015]
    Keywords : Usnea; hair lichens; water; water holding capacity; morphology;

    Abstract : Lichens are poikilohydric and cannot control water uptake and loss, water relations could therefore impact their distribution. This study examines if morphological, anatomical, and water storage traits could explain distribution of epiphytic species in the lichen genus Usnea. READ MORE

  3. 12. The effect of forest structure and vegetation on reindeer habitat choices : A study in the winter grazing grounds of Vilhelmina norra reindeer herding district, Västerbotten, Sweden

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Sofia Lindmark Burk; [2014]
    Keywords : Reindeer husbandry; habitat choice; winter grazing grounds; forest structure; GPS-collars; key and core areas; RIVO;

    Abstract : The objective of this thesis was to examine whether forest structure and ground vegetation could explain the habitat choices of the reindeer within similar forest stands. The field work was carried out on 60 sites scattered across a part of the winter grounds for Vilhelmina Norra reindeer herding district. READ MORE

  4. 13. Long-term effects of nitrogen deposition on epiphytic lichens

    University essay from Institutionen för ekologi, miljö och geovetenskap

    Author : Marie Rönnqvist; [2013]
    Keywords : simulated nitrogen deposition; boreal forest; epiphytic lichens; cumulative loads;

    Abstract : The main aim of this study was to analyse the long-term effects on epiphytic lichen dry mass development, diversity and community structure after exposure to a simulated nitrogen deposition gradient. A whole tree experiment was set up in a boreal forest in the County of Västerbotten in Sweden, whereby 15 trees were artificially irrigated and nitrogen fertilized during seven consecutive years (2006-2012). READ MORE

  5. 14. Bevarande av hotade epifytiska lavar och vedsvampar i Norrbottens län : rödlistan som verktyg i praktisk naturvård

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

    Author : Frida Snell; [2013]
    Keywords : Rödlistan; rödlistade arter; boreal; epifytiska lavar; vedsvampar; hotade arter; tallnaturskog; barrnaturskog; lövbränna; grannaturskog; trädbevuxen myr; bevarandearbete; Red-list; red-listed species; epiphytic lichens; wood-decay fungi; threatened species; boreal pine forest; mixed boreal forest; boreal spruce forest; boreal forest swamp; nature conservation;

    Abstract : Många arter påverkas idag negativt av skogsbruket. Detta visar sig dels i ett växande antal arter på den svenska Rödlistan. I Norrbottens län är idag närmare 500 skogslevande arter rödlistade, och dessa är fördelade över flera olika organismgrupper. READ MORE

  6. 15. Epiphytic lichen flora in a boreal forest chronosequence

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

    Author : Aron Sandling; [2012]
    Keywords : Island biogeography theory; gradient; succession; species richness; species composition; bark structure; bark pH;

    Abstract : Epifytiska lavar utgör en viktig del av floran i den boreala zonen. Några miljövariabler är kända för att styra artrikedomen och artsammansättningen av epifytiska lavar på beståndsnivå, såsom träddiversitet, beståndsålder, fuktighet och trädens barkstruktur. READ MORE