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Published byAdelia Green Modified over 9 years ago
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My Life’s a Circle
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Matter Cycles the movement of INORGANIC materials from the atmosphere or soil into living ORGANISMS and back again.
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WATER CYCLE WATER IN ATMOSPHERE PRECIPITATION EVAPORATION WATER /ICE
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WATER CYCLE EVAPORATION - liquid to gas PRECIPITATION - gas to liquid Organisms return water to the atmosphere through TRANSPIRATION, PERSPIRATION, and EXCRETION
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Carbon/Oxygen Cycle CARBON DIOXIDE PHOTOSYNTHESIS RESPIRATION OXYGEN
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Carbon/Oxygen Cycle Photosynthesis – plants use CARBON DIOXIDE and release OXYGEN Respiration – plants and animals use OXYGEN and release CARBON DIOXIDE
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Carbon/Oxygen Cycle Burning of FOSSIL FUELS increases the amount of CARBON DIOXIDE in the atmosphere. This may be increasing the temperature. (GREENHOUSE effect)
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Nitrogen Cycle NITROGEN GAS NITROGEN FIXATION DENITRIFICATION NITRATES ANIMALS PLANTS
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Nitrogen Cycle Nitrogen is necessary to make AMINO ACIDS Nitrogen FIXATION is done by plants containing rhizobium bacteria. DENITRIFICATION is the returning of nitrogen into the atmosphere
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Biotic Potential The rate at which a POPULATION will grow if all individuals SURVIVE and REPRODUCE at maximum capacity.
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Growth Curve Lag Phase – little or no increase in a population Exponential Phase – population DOUBLES in a specific time interval and keeps DOUBLING in increasingly shorter periods of time.
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Exponential Phase Time Lag Phase
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Carrying Capacity The MAXIMUM number of individuals that the ecosystem is capable of SUPPORTING.
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Carrying Capacity Lag Phase Exponential Phase Time
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Limits to Growth Density-dependent factors Density-independent factors
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Density-dependent factors As the DENSITY changes, these factors change Space Food Predators
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Density-independent factors Factors that affect population that have nothing to do with DENSITY Climate changes Natural disaster
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Succession The gradual, SEQUENTIAL replacement of POPULATIONS in an area
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Pioneer Species The first SPECIES to colonize an area
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Seral Community Intermediate COMMUNITIES
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Climax Community A community that will remain STABLE as long as it is left undisturbed
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Primary succession The sequential REPLACEMENT of populations of an area that has not previously supported LIFE Example: Sand dunes, volcanic rock, glaciers removing soil, pavement
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Secondary succession The sequential REPLACEMENT of populations in DISRUPTED habitats that have not been totally stripped of soil and vegetation. Example: FOREST FIRE, LOGGING, FARMING, MINING Old field succession – Replacement of populations in abandoned farm fields
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Succession in lakes The transformation of CRYSTAL CLEAR BODIES OF WATER to dry LAND
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Eutrophication An increase in the amount of NUTRIENTS in an environment
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Eutrophic A lake with many NUTRIENTS in it.
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