Flow of Energy in an Ecosystem
what is autotrophs?
an autotroph is an organism that collects energy from sunlight or inorganic substances to produce food.
not counting the right way
what is K-strategists?
The carrying capacity strategy is an adaptation for organisms living in relatively stable conditions.
how much of the earth has fresh water?
Only about 2.5% of water on earth is freshwater.
what is Communities?
is a group of interacting populations that occupy the same area at the same time.
how does Heterotrophs get their energy?
they get their energy by consuming other organisms, so they are called consumers.
how do you find the Population of humans?
Birth rate - death rate + migration rate / 10
what is R-strategists?
The rate strategy is an adaptation for organisms that live in environments with fluctuations in food availability, temperatures, and migrating organisms.
what is Littoral zone?
closest to shore, sunlight reaches the bottom, many producers and consumers
what is a climax community ?
When a stable mature community results when there is little change in the composition of species.
what is herbivores?
they are heterotrophs that only plants like cows and grasshoppers and rabbits
how could the population decrease
by people dying or getting killed
what is carrying capacity?
Carrying capacity is limited by living and nonliving factors. Because resources are not infinite, the abundance of a species is affected.
what is Limnetic zone?
well lit, lots of plankton (free floating autotrophs and heterotrophs) and fish
what is Ecological Succession ?
The change that occurs in an ecosystem where one community replaces another as a result of changing abiotic and biotic factors is known as
what is a carnivores?
they are heterotrophs that prey on others like wolfs and lions
woman giving birth or people having kids
what is population density?
it is the number of organisms per unit area
how much does Glaciers contain of fresh water?
68.9%
what are examples of primary Succession?
Small plants, fungi, and insects start to become established in the new soil. Eventually shrubs and trees will grow when enough soil is present
what are Detritivores
they eat things like worms and insects, eat dead matter returning nutrients to the soil, air and water.
how could it balance?
by having the same amount of people every year
what is Dispersion (Spatial Distribution)?
it is the pattern of spacing of a population within an area. Availability of resources like food and water is a main determinant of dispersion pattern.
what is the Profundal zone?
little light, little oxygen, cold, few species live here
what is Secondary Succession?
is the orderly and predictable change that takes place after a community of organisms has been removed but the soil has remained intact. Pioneer species that establish in the disturbed area are the first to start secondary succession.