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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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if a population is very large or spread out, ecologists use the _______ method to estimate the population's size.
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sampling
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direct observation
indirect observation mark and recapture sampling |
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when ecologists count individuals of a species one by one, they are using _____ to estimate the population's size.
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direct observation
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direct observation
indirect observation mark and recapture sampling |
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an ecologist has discovered a group of nests. she knows that to be the nest of ther bird that typically has 4 members living together. she counts the nests to get an estimate of the bird population. the method the ecologist is using to estimate the population's size is ________.
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indirect observation
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direct observation
indirect observation mark and recapture sampling |
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all of the following are limiting factors except______.
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time
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food
space time weather |
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every organism has a variety of _____ that enables it to live successfully in its enviroment
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adaptations
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adaptations
communities habitats niches |
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this relationship is an example of parasitism.
a bat pollinating a catus a bird building a nest on a tree a flea living on a cat's blood ants protecting a tree |
a flea living on a cat's blood
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a tapeworm is living inside your stomach. u are the ___.
host parasite prey predator |
host
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fires, hurricanes, farming, logging and mining are few examples of disturbances to landscapes that will cause____ to occur over time.
primary succession secondary succession climax community |
secondary succession
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a newly formed island from an undersea volcano or rock that is uncovered by a melting sheet of ice is an example of where____can occur over time.
primary sucession secondary succession climax community |
primary succession
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a community of plants that is relatively stable and undisturbed and has reached end stage of succession is called___________.
primary succession secondary succession climax community |
climax community
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the first species to populate an area are called
hosts parasites pioneer species predators prey |
pioneer species
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the first species arrive to a new area usually by
birds humans if no species, there wil never b rats wind and/or water |
wind and/or water
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the first species usually are____.
grasses mosses and lichens trees |
mosses and lichens
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we see secondary succession areound us everyday in our growing cities. it takes ____ for an area experiencing secondary succession to reach a climax community
10 years or more 100 years or more 1000 years or more 10000 years or more |
100 years or more
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students counted 75 sand crabs in a 5-meter by 3-meter section of a beach. the population density of sand crabs in that section is ___.
5 crabs per meter 15 crabs per meter 25 crabs per meter 1,125 crabs per meter |
5 crabs per meter
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a freshwater lake has a muddy botttom, which is home to many different species of algae and other organsims. many species of fish feed on the algae. this abiotic factor in the ecosystem is the ____.
amount of food available to fish color of algae # of species of fish temperature of water |
temperature of water
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although 3 different bird species all live in the same trees in an area, competition between the birds rarely occurs. the reason is bc ___.
eat the same food have a limited supply of food live in the same parts of trees occupy different niches |
occupy different niches
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typical decomposers include
grasses and ferns lions and snakes mice and deer mushrooms and bacteria |
mushrooms and bacteria
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wind, water, and living things are 3 means of ____.
continental drift deconposition dispersal succession |
dispersal
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the biome which we live is__.
boreal forest grasslands temoerate deciduous forest tropical rain forest tundra |
temperate deciduous forest
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