The flashcards below were created by user
what is a lichen?
symbiotic association of a fungus and one or more algae
what is mutualism?
the relations between two different organisms that both benefit from each other
what is commensalism?
relation between two different organisms, one receives benefits from the other without damaging it
what is parasitism?
the relation between two organisms in which one receives benefits from the other by causing damage to it
whats involved in lichen reproduction?
Algae reproduces entirely by cell division.
Fungus forms “fruiting bodies” and releases spores from apothecia or perithecia.
Only rarely does a germinating spore capture an algal cell to form a lichen
Most lichens reproduce vegetatively: soredia, isidia and thallus fragments
whats involved in lichen taxonomy?
Algal partners will also occur alone in nature
Nearly all the fungal partners are restricted to their lichen occurrence
Lichen taxonomy is based on the fungus present
what values do lichen have?
Pioneer organisms of hostile environments
Soil formation and soil protection
Air pollution indicators
Food source, especially in the polar regions
Extracted pigments used as dyes
lichen substrate is influenced by?
what is saxicolous?
means growing on rock
what is corticolous?
means growing on bark
what is terricolous?
means growing on soil
what is lichen classification based on?
its based on appearance rather than based on fungal partner
what is crustose?
what is foliose?
what is fruticose?
crustose lichens (crusty)
foliose lichens (leafy)
fruticose lichens (stalked)
british soilder lichen
powder horn lichen
smooth rock tripe lichen