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27 Cards in this Set
- Front
- Back
What is it called when there are fewer species but those fewer species can expand to more habitats?
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Habitat expansion
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_____ is when you look at the diversity within a homogenous habitat patch.
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alpha diversity
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_______ is when you look @ diversity across a whole region.
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gamma diversity
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_______ is when you look @ the diversity between one patch and another in a certain region.
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beta diversity
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____ describes how when there are more species then there are a fewer number per species.
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density compensation
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_____ is like a combo of of habitat expansion and density compensation.
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ecological release
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_______ states that when there are fewer species then they are released from competition.
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ecological release
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Why would larger islands have more species? 3 main reasons
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1. more resources= more nitches: species are less likely to go extincy.
2. species are more likely to find big island (passive sampling hypothesis) 3. On large island a disturbais less likely to kill off species. (disturbance hypothesis) |
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What are the two arguments in thoery of island biogeography for why the number of species on island are in a dynamic equilib?
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1. not all species are equally good disperses.
2. lots species = greater extinction rate |
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ECOSYSTEM
what type of system is ecosystem is respect to energy? |
open system
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ECOSYSTEM
In an ecosystem what is the biomass produced by plants/ autotrophs called? |
Gross primary production (GPP)
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What is photosynthesis minus respiration that leads to the growth of plants called?
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Net primary production (NPP)
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what level of disturbance leads to the greatest number of species?
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intermediate
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what 2 things influence NPP in NPP in an water environment?
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amount light and nitrate level.
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____________ is the proportion of biomass in 1 trophic level consumed by individ in next highest trophic level.
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exploitation effeciency
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______ = the proportion of ingested that = production
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gross production effeciency
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_______ ______ is the proportion of production @ one trophic level that results at production in next higher trophic level.
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ecological effeciency
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what do microrhyzal fungus do for plants?
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They increase plants root surface area so more nutrients can be uptaken.
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What forms of N can plants use?
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Nitrate, nitrite, and ammonia
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____ is the area in lake where all productivity occurs?
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photic zone
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what is the limiting nutrient in a freshwater environment?
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phosphorous
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what is it called when lower trophic levels influence top layers.
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bottom up control
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_____ is a group of sub populations that are connected by migration.
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metapopulation
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what is the formula for the change in population rate/ change in time?
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m(1-p)p-ep
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what is net ecosystem production.
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net primary production NPP- soil respiration.
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what is assimilation effecency
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the % of energy, consumed by a trophic level, that is assimilated.
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what is net production effeciency
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the % of assimilated energy that leads to production.
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