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21 Cards in this Set
- Front
- Back
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What is ecology?
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The study of the interactions of organisms and their environment
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What is a population?
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A group of individuals of the same species occupying a given area at the same time
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What is a community?
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A group of organisms of different species existing in the same area at the same time
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What is an ecosystem?
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A commuinty and its physical environment
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What is a biome?
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Major types of ecosystems on earth
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What is a biosphere?
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Those regions of the earth's
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What is a potential range?
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Area over which a species could survive if transplanted there
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What factors affect distribution of organisms?
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Dispersal limitations, behavior and habitat, biotic factors, and abiotic factors
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Name 4 biotic factors that limit distribution of organisms
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Disease, Herbivory, Competition, lack of pollinators, and absense of symbiosis
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What are the two most important factors determining the distribution of organisms?
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Temperature and precipitation
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What affects earths terrestrial biomes?
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Locations due to latitude (temp. and precipitation) and position of continents
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What is physiognomic structure?
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Size, shape, types of organisms and their relation to each other and the physical environment
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What is convergent evolution?
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Similar phenotypes due to similar selection pressures over time
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Describe features of a tropical rain forest biome
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High average annual temp and precip, lush, dense vegetation. Very diverse. Large vertical stratification due to competition for light
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Describe features of a savanna biome
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Grassland with seatted trees
large herbivore and predators rainy and dry season fire adapted |
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Describe features of a Desert biome
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<30 cm of rain per year
high temperature CAM plants Unique plants with adaptations to harsh environment |
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Describe features of a Chapparal biome
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Evergreen shrubs,
hot and dry summers mild wet winters In italy and greek Fire-dependent - seeds germinate after fire, roots fire-resistant |
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Describe features of a temperate grassland biome
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No trees
occasional fire, fertile soils |
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Describe features of a temperate deciduous forest biome
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Deciduous trees,
4 seasons cold winter open forest |
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Describe features of a coniferous forest biome
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evergreen trees (gynosperms
Largest biome on earth 4 seasons, large amounts of snowfall |
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Describe the features of a tundra biome
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Permafrost - permanently frozen top soil
very cold, high winds no trees or tall plants 20% of land area on earth Low annual precipitation |
