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biology ch 54
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who were the first people to observe cells
hooke and leewenhook
biomass
organic material that non photosynthetic organisms can eat
NPP results in
biomass
primary consumer
herbivore - an organism that eats plants
detritus
dead animals and plant tissue
detritus are consumed by
primary decomposers
biomass represents
chemical energy
organisms that obtain their energy from the same type of source are said to occupy the same...
trophic level
what connects the trophic levels
a food chain
grazing food chain
collection of organisms that eat plants, along with the organisms that eat herbivores
secondary consumers
consumers that eat herbivores
food webs
are a compact way of summerizing energy flows and documenting the complex trophic interactions that occur in communities
primary producer
an autotroph - an organism that can synthesize its own food from inorganic sources
NPP
net primary productivity - energy that is invested in new tissue
understanding this is a primary focus of ecosystem ecology because it dictates the amount of energy available to consumers and ecomposers
NPP
production of biomass is highest at which trophic level
lowest trophic level
what may influence the number of trophic levels that can be supported in a given ecosystem
inefficiencies of energy transfer, environmental stability, and environmental complexity
gross primary productivity
total amount of photosynthesis in a given area and time period
gross photosynthetic efficiency
the efficienfy with which plants use the total amount of energy available to them
secondary production
the production of new tissue by primary consumers
the path that an element takes as it moves from abiotic systems through organisms and back again is called...
biogeochemical cycle - life earth chemical
completely decayed organic material is called .... because it is rich in a family of carbon containing molecules called humic acids
humus
what most often limits the overall rate at which nutrients move through an ecosystem
the decomposition of detritus
decomposition rate is influenced by what 2 factors
abiotic conditions and the quality of detritus as a nutrient source for things that complete decomposition
groundwater
water found in soil
global carbon cycle
documents the movement of carbon among terrestrial ecosystems, the ocean, and the atmosphere
what is responsible for taking carbon out of the atmosphere and turning it into tissue
photosynthesis
cellular respiration
releases carbon that has been incorporated into living organisms to the atmosphere in the form of carbon dioxide
carbon dioxide functions as a
greenhouse gas
Author
smsndrs1
ID
38238
Card Set
biology ch 54
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biology ch 54
Updated
2010-09-29T04:31:47Z
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