exam four; pt. two Flashcards
(104 cards)
the ____ sparrow is considered invasive in north america
house
higher PET, the number of _____ richness increases
species
indiana has how many endemic (unique) to indiana
0
the states with more endemic species have more ____; resulting from different topography within the state
microniches
the penstemon deamii may be endemic to indiana
____ covers 25% of earths land surface; there are two types
grassland; tropical and temperate
high evaporation,
severe droughts (periodically)
rolling - to - flat terrain
fires are needed to maintain grasslands
dominate animals are grazing and burrowing (bison and prairie dog)
4 common charac. of grasslands
if there is no fire in the grassland what happens
overgrowth of trees
what are the two grass forms of grassland
sod and bunch grass
examples of c4 grass species are
corn, sugar cane
c3 grasses species are
wheat and rice
a family can have C3 or C4 members; true or false?
true
plant family with most species
orchid
plant family with the most individuals
grasses
big bluestem grass is significant because
it grows tall
common forbs in grasslands
goldenrod, sweet cone flower, purple cone flower, prairie blazing star
more biomass in soil than above ground in ____; because of ___
grassland; fires
when temp increases, productivity of grassland _____
decreases (bc of dry soil)
high temp cause forest productivity to _____
increase (forests have deep roots; so dry temp. does not affect them)
most of the tropical savannas are in ___
africa
a tropical grassland with scattered trees or shrubs
savanna
what biome?
- low soil nitrogen
- extreme fluctuation of precipitation
- not a lot of trees (vertical structure)
- great diversity of hoofed animals (ungulates)
- dominate herbivores: invertebrates (termites, grasshoppers)
savanna
common animals in grassland
african elephant, hyena, warthog, ostrich
common charac. of shrubland
- wet winter season; dry summers
- chapralls in california (evergreen)
- chapralls at foot of rocky (deciduous; no chamise)