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12 Cards in this Set

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  • Back
Tundra
Abiotic
long cold winter & cool short summer
short growing season
low precipitation
permafrost; nutrient poor soil
Tundra
Biotic
short vegetation
low annual primary productivity
low diversity
Boreal Coniferous Forest
Abiotic
cold winter & short, mild summer
humid: low precipitation & low evaporation
acid and infertile soil
Boreal Coniferious Forest
Biotic
low productivity, but active most of the year
continous litterfall; slow litter decomposition
low species diversity
little vertical stratification
Deciduous Forest
Abiotic
warm summer & cool to cold winter
fairly high precipitation well distributed
Deciduous Forest
Biotic
active only portion of the year
litterfall seasonal and massive; rapid litter decomposition
high turnover of nutrients
vertical stratification
Grassland
Abiotic
variable annual precipitation
P/E 0.2-0.8
periodic drought
rolling to flat terrain
Grassland
Biotic
adapted to fire and grazing; often maintained by fire
grazing and burrowing animals
Desert
Abiotic
low annual precipitation
infrequent large rainfall events
P/E ratio < 0.2
wide temperature fluctuation
Desert
Biotic
ephemerals
succulents & phreatophytes
Southeastern Evergreen Forest
Abiotic
hot summer & mild winter
long growing season
high fire frequency
Southeastern Evergreen Forest
Biotic
many fire dependent communities
many fire adapted tree species