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32 Cards in this Set

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Ecology
the study of interactions between organisms and their environments
Abiotic
non-living components
Biotic
living components
Ecological time
hours/minutes days
Evolutionary time
decades, centuries, longer
Dispersal
how organisms are distributed on the planet
Climate
prevailing weather in an area
What two factors determine climate?
temperature and water
From shallowest to deepest what are the 3 aquatic zones
photic, aphotic, , benthic
None
Photic
where photosynthesis can occur because there is enough light
Aphotic
little light
Thermocline
narrow strew of rapid temperature change
Benthic zone
bottom substrate
Benthos
community of organisms
Detritus
dead organic matter, food for benthos organisms
What are the three kinds of lakes?
oligotrophic, eutrophic, mesotrophic
Oligotrophic
deep, nutrient poor, clear water (Tahoe)
Eutrophic
shallow, high nutrient, (lake Wilson)
Mesotrophic
moderate amounts of nutrients and photosynthetic production
Moving water
nutrients depend on overhanging vegetation, usually high oxygen
Inertial zone
where land meets water, organisms attach to things or bury themselves
Netric zones
shallow regions over continental shelves
Oceanic zone
very deep water past the continental shelves
Pelagic zone
oven water of any depth, nutrient concentration is lower
Benthic zone
seafloor bottom, nutrients reach here when organisms die and sink
Tropical forests
equator, most complex, constant temperature and rainfall, canopy
Savanna
tropical grassland with scattered trees, occasional fire and drought, large herbivores
Desert
sparse rainfall
Chaparral
spiny evergreens at midlatitudes along coasts
Temperate grassland
all grasses, seasonal drought, occasional fires, large mammals
Coniferous forest
cone-bearing trees, cooler, keep needles
Tundra
permafrost, very little precipitation