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biomes 2019

braswell, pearson, 7th grade ga, biomes

desert dry biome, receives less than 25cm of rain a year, large shift in temperature (day to night) animals and plants adapted to hold on to water
rain forest forests with large amounts of rainfall year round, can be tropical (very warm) or temperate (with moderate temperatures)
grassland an area populated mostly by grasses and nonwoody plants
savanna a special type of grassland that is located close to the equator
deciduous tree trees that loose their leaves in the fall,
boreal forest/ coniferous forest colder forest made mostly of pine trees "Boreal" means north
coniferous tree pine tree
tundra biome that is extremely cold and dry
permafrost an inch thick permanently frozen layer of dirt
canopy second tallest layer in the rain forest, makes up a green roof
emergent layer tallest layer in the rain forest
estuary a biome that is a mixture of fresh and salt water
marine biome mad up of oceans and salt water
freshwater biome made up of lakes, rivers and streams
temperate deciduous forest moderate temperatures, lots of trees that loose leaves, it is where we live
birth rate number of births per 1000 organisms over a given amount of time.
death rate number of deaths per 100 organisms over a given amount of time.
immigration moving into a new area
emigration leaving or exiting a group or area
limiting factor limits what can live there
population a group of one type of organism in an area
biotic living or dead
abiotic nonliving
organism any living thing
habitat an environment that provides the things an organism needs to live and grow
species one type of living thing that is similar and can reproduce to make fertile offspring
population all of one type of living thing in an area
community all the different populations in an area
ecosystem all the different populations plus the abiotic factors in an area
population density number of individuals divided by the area
natural selection individuals that are more suited to an area live longer & have the chance to mate more
adaptation behaviors and characteristics that help an animal live in its ecosystem better
niche the very specific job of an organism in its habitat
competition fighting for limited resources
predator hunter
prey hunted
symbiosis two types of different living things living closely together where at least 1 benefits
mutualism a type of symbiosis where both organisms get benefits
commensalism a type of symbiosis where one organism benefits (+) and the other doesn't get bothered (0)
parasitism a type of symbiosis where one organism benefits and one gets hurt
parasite the one in parasitism that gets benefits (like a flea)
host the one in parasitism that gets used (like the dog)



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