Ap Biology Chapter 55 Flashcards

5712355276	Ecosystem	Consists of all the organisms living in a community, as well as the abiotic factors with which they interact	0
5712375435	Law of conservation of mass	States that matter cannot be created or destroyed	1
5712388447	Detritivores	Decomposers that consume nonliving organic matter	2
5712401896	Primary production	In an ecosystem is the amount of light energy converted to chemical energy by autotrophs during a given time period	3
5712420794	Gross primary production	Total primary production	4
5712426182	Net primary production	GPP minus energy used by primary producers for respiration	5
5712440073	Standing crop	The total biomass of photosynthesis autotrophs at a given time	6
5712454880	Limiting nutrient	The element that must be added for production to increase in an area	7
5712471194	Eutrophication	A process by which nutrients, particularly phosphorus and nitrogen, become highly concentrated in a body of water, leading to increased growth of organisms such as algae or cyanobacteria.	8
5712483979	Actual evapotranspiration	The water annually transpired by plants and evaporated from a landscape	9
5712497961	Secondary production	An ecosystem is the amount of chemical energy in food converted to new biomass during a given period of time	10
5712514999	Productions efficiency	The fraction of energy stored in food that is not used for respiration	11
5712525457	Trophic efficiency	The percentage of production transferred from one trophic level to the next 5%-20%	12
5712542322	Turnover time	A ratio of the standing crop biomass to production	13
5712558114	Biogeochemical cycles	Nutrient circuits in ecosystems involve biotic and abiotic components	14
5712573411	Green world hypothesis	Proposes several factors that keep herbivores in check	15
5712640467	Hubbard Brook Experiment Forest	Has been used to study nutrient cycling in a forest ecosystem since 1963	16
5712654423	Critical load	The amount that plants absorb without damaging the ecosystem	17