Essays about: "lichen air"

Showing result 1 - 5 of 9 essays containing the words lichen air.

1. 1. Long-term Nitrogen Deposition and Recovery of Epiphytic Lichens : Concealed memory and implications

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

   Author : Camille Volle; [2022]
   Keywords : epiphytic lichens; N deposition; boreal forest; recovery; critical load;

   Abstract : Anthropogenic activities have increased nitrogen (N) emissions. However, higher N deposition is associated with negative fallouts in ecosystems, highlighting the necessity to define its critical load (CLO). Lichens, with their lack of roots, stomata, and cuticles, are helpful air pollution indicators and can be used to establish N CLO. READ MORE

3. 2. 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

4. 3. 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

5. 4. The effects of forest age, forest edge and landscape factors on the occupancy and cover of the Micarea globulosella lichen in a Swedish boreal forest

   University essay from SLU/Dept. of Ecology

   Author : Julian K. Halfmann; [2011]
   Keywords : Lichen; Ecology; Conservation; Forestry; Biodiversity;

   Abstract : Lichens are sensitive indicators of changes in environmental factors such as moisture, light intensity and air pollution. They are easily affected by forest fragmentation and by recent increases in forest edges as a result of intensive use of forest resources. READ MORE

6. 5. The effect of landscape structure on distribution and abundance of Lobaria Pulmonaria

   University essay from Institutionen för kultur, energi och miljö

   Author : Frida Skagerberg; [2011]
   Keywords : lichens; epiphytes; distribution; abundance; conservation;

   Abstract : The objective of the current study was to analyse the effect of landscape structure (habitat size and exposure to farmland) on the occurrence and abundance of Lobaria pulmonaria, a foliose cyanolichen. Since the agrarian revolution during the 19th century the agricultural landscape has become increasingly fragmented resulting in isolated meadows and wood-pastures surrounded by farmland. READ MORE