APES Unit 3 Flashcards
climate
general pattern of atmospheric or weather conditions
weather
local area’s short-term temperature or other physical conditions
3 factors that affect distribution of air
Properties of air, water, and land
Uneven heating of the earth’s surface
Rotation of the earth on its axis
Coriolis effect
the earth’s rotation causes winds to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
currents
caused by prevailing winds and the rotation of the earth
thermocline
differences in water temperature
upwelling
water density differentials
El Niño
disruption of the ocean-atmosphere system
Rain Shadow Effect
Air travels over mountaintops and into slopes creating warm air. It has a lot of moisture but doesn’t release it. This creates dry plants and soil.
The Greenhouse Gases
Carbon Dioxide, Methane, Water, Nitrous Oxide
The Greenhouse Effect
the gases get trapped in the atmosphere and warm the earth
biomes
large terrestrial regions characterized by similar climate
Tropical Rain Forests
year round warmth with high humidity and heavy rainfall
evergreen vegetation
high biodiversity
canopy, emergent, sapling, and ground zones
poor soil quality
Temperate Deciduous Forests
moderate temperature fluctuates
few species: maple, beech, oak
slow decomposition of leaves
Boreal Forests (Taigas)
long dry and cold winters few species: pine, cedar, spruce needle leaves low plant biodiversity slow decomposition of needles
Tropical Grasslands (Savannas)
warm temperatures and alternating warm and dry seasons
large grazing herbivores
deep rooted plants
Temperate Grasslands (prairie)
rainfall
cold winters hot and dry summer
productive for crops
high winds
Cold Grasslands (Arctic Tundra)
frigid treeless plains
extreme cold (permafrost)
limited vegetation
animals like Arctic Fox
Tropical Deserts
little vegetation
extreme high daytime temperatures
Temperate Deserts
more precipitation than tropical deserts
drought resistant plants (cacti)
high daytime and low nighttime temperature
Cold Deserts
sparse vegetation
extremely cold winters
Turbidity
measure of how cloudy water is due to sedimetn
Salinity
concentration of salts in given water
Plankton
bottom trophic levels
Phytoplankton
dominant primary producers
Euphotic zones
upper layers of ocean that receives most sunlight
Zooplankton
drifting herbivores
Nekton
strong swimming like fish
Benthos
bottom welling organisms
Dissolved Oxygen
marine life depend on this
Coastal Zones
high tide mark in oceans to the continental shelf
Estuaries
freshwater meets saltwater
Intertidal
rising and falling tides
Coral Reefs
slow growing diverse ecosystems exist along equator in warm waters
Open Ocean and Sea Floor
great expanse of the continental shelf
Bathyl Zone
middle layer of ocean with little sunlught
Abyssal Zone
bottom lower receives very little sunlight
marine snow
organic waste that settles at floor from top layers
Freshwater life zones: lentic
standing bodies of water (lakes, inland wetlands, bogs , and ponds)
Freshwater life zones: lotic
moving bodies of water such as rivers and streams
submergent
underwater
emergent
rooted in water yet penetrates air/water boundary
oligotrophic
Clear, deep lakes that have low nutrient levels and therefore limited primary productivity
eutrophic
Once lakes have accumulated a high concentration of nutrients that support high levels of net primary productivity by producers
Cultural eutrophication
Large amounts of nutrients added due to lake systems due to human activities, such as runoff of fertilizers
runoff
Freshwater from precipitation and melting ice that flows from the earth’s surface and into bodies of water
watershed
The land area that delivers runoff to the river or small streams
Source zone
Contains rivers and streams that are directly fed by mountain snowmelt
Transition zone
Has streams and rivers with more turbid water due to the increase in sediments flowing into them.
Background extinction
Normal extinction of various species as a result of changes in local environmental conditions
Mass extinction
Major groups of species wiped out within a short time
Biological extinctions
Complete disappearance of a species from the earth
Endangered species
Organisms whose population size has decreased to such a low level that they are at extreme risk of becoming extinct
Threatened species
Organisms whose populations are declining due to human activity and could potentially become endangered in the near future
Old-growth forest
Has not been modified by human activities or natural disasters in 200 years or more
Secondary-growth forest
Form from secondary succession once land has been cleared due to human activity or some type of natural disaster
Deforestation
Removes large tracts of forested land for fuelwood, agriculture, or urban development
Tree plantations
Areas commercially maintained for timber resources
rangelands
Wide-open, Non-restricted areas for grazing by grass eating and shrub-eating livestock
pastures
Fenced areas that are maintained by ranchers through planting of domesticated grasses or shrubs
Rotational grazing
Cattle or livestock are contained in fenced-off spaces where they are rotated from one field to another over the course of the year.
bycatch
The unwanted fish and other marine creatures caught during commercial fishing for a different species