biomes a drought makes vegetation scarce. what is a biome? group of ecosystems with similar...
TRANSCRIPT
BiomesA drought makes vegetation
scarce
What is a biome?
Group of ecosystems with similar climates and organisms
What are the 6 major biomes?
Rain forestDesertGrasslandDeciduous forestBoreal forestTundra
How do we categorize biomes?
Climate-temperature and precipitation
Types of organisms
Rainforest Biomes
Lots of rainThick vegetation-lots of plantsLeaves block much of the sunlight
from reaching the forest floor2 types of rainforest biomes-
temperate and tropical
Temperate Rainforest
Northwest U.S.Huge trees like cedars, redwoods,
and Douglas firsModerate temperatureOver 300 centimeters of rain each
yearMule deer, pileated woodpecker,
golden buprestid beetle
Tropical Rainforest
Found close to Equator
Warm and humid year round
A lot of rain- over 350cm per year in Costa Rican rainforest
Canopy-leafy roof formed by tall trees
Understory-shorter layer of trees and vines
Abundant life- over 300 kinds of trees in 100-square meters
Probably contain more species than all other land biomes combined
Orangutans, spider monkeys, tigers, sloth
Desert
Less than 25cm of water per yearEvaporation rate greater than
precipitation rateVery hot during the day and very
cold at nightSaguaro cactus, Gila monsters,
vipers, jack rabbits
Grassland Biomes
Tall grasses
25-75 cm of rain each year, but savannahs can receive as much as 120 cm of rain
Fires and draughts common
Prairies and savannahs
Elephants, bison, antelope, zebras, rhinos, giraffes, kangaroos
Deciduous Forest
Deciduous trees-maple, oak
Seasons-warm in summer, snow in winter
Trees lose leaves in fall
Salamanders, black bears, white-tailed deer, squirrel, fox
Boreal Forest
Evergreen trees-spruce, pine
Coniferous trees- have seeds in cones
Winters cold, lots of snow
Summers warm and rainy
Red squirrels, finches, snowshoe hares, moose, owls, lynx, wolves
Tundra
Cold and dry
Permafrost-ground continuously frozen
Many ponds, marshy
In the Arctic circle, the sun does not set in summer
Mosses, grasses, shrubs, very small trees
Insect-eating birds, caribou, foxes, wolves, Arctic hares
Mountains and Ice
Mountain ranges, land that is covered with thick ice
Mountains have a range of biomes as you ascend
Antarctica and Greenland are covered in ice
Penguins, polar bears, and leopard seals
Freshwater Ecosystems
Streams and Rivers-insects, trout, frogs, algae
Ponds and Lakes- dragonflies, catfish, sunfish, turtles, snails, algae, bacteria
Marine Ecosystems
Estuary- freshwater meets salt water, crabs, worms, clams, fish
Intertidal Zone- Between high and low tide lines, varying water and temperatures, barnacles, sea stars, clams, crabs
Neritic Zone- Shallower ocean near continents, sardines, algae, coral
Open Ocean- light only reaches a few hundred meters, tuna, swordfish, whales
Deep Zone- Almost totally dark, scavengers, giant squid, angler fish