quiz Flashcards
why are there different tree specie?
because requirements are limited, waster sunlight nutrients space
what is competitive advantage?
when trees out compete for these sources
in good conditions___ wins
board leafs
in bad conditions___win
conifers
what is a niche?
a niche is where a species requirements to grow fall between a min and a max
where is the strongest competition?
where niches overlap
first disturbance type
endogenous, within a community, examples flooding lightning soil compaction
another disterbance type
biotic, fungi mostly
natural disturbances (s)
small, like a tree fall
natural disturbances (l)
large, like wind or fire
why are distrubances good for a forest?
renew the ecosystems and diversify the landscape
shifting mosaic means…
community’s are composed of patches in different succession rates.
five most dangerous root diseases
laminated root rot armilla root disease annosus root disease black stain port orford
armillia
armillira obsecora
laminated
phellinus weirii
black stain
ceratocystic wager
annosus
fomes annosus
port orford/ brown butt
phaeolus schwienitzii
swiss need cast___ years cycle
3 year cycle
chlorosis is
yellowing of foliage
big cells
early wood
small cells
late wood
foreign disturbance
means that it has not happened in that area and there are no adaptations, logging,insects, pathogens
soil compaction
big trees loved to death, the soil gets smothered and there is no air in the soil anymore
natural disturbances
fire wind
biological legacies
species that survived a disturbance and speed up change
invasive species barriers
- geographical
- survive
- establishment* (now an established species)
- dispersal
- harm
naturalized species
an alien species that does not cause harm
3 ways of controlling invasive species
manual labor
chemical treatments
biological controls (goats)
how forest soils develop
- climate
- parent material
- biota(living things, worms)
- topography(less soil on top of mountains)
- time
