Ecology Flashcards
The number of species present
Species richness
The amount of energy produced
Primary productivity
Places where environment changes abruptly
Ecotones
The total of all the ways an organism uses the resources of its environment
Niche
Species whose effect on the composition of communities are greater than one might expect are……
Keystone species
When a community changes from simple to complex it is known as….
Succession
When a community has been disturbed but organisms still remain it is known as…
Secondary succession
When organisms move into an area and change its nature it is called….
Primary succession
Atoms of various chemical elements are said to move through ecosystems in….
Biogeochemical cycles
Permeable underground layers of rock
Aquifers
The synthesis of nitrogen-containing compounds from N2 is known as…..
Nitrogen fixation
Prokaryotic microbes oxidize part of it to form NO3- is a process called
Nitrification
Synthesize the organic compounds of their bodies from inorganic precursors such as CO2, water, etc.
Autotrophs
Photosynthetic organisms
Photoautotrophs
Obtain energy by means of inorganic oxidation reactions
Chemoautotrophs
Organisms that cannot synthesize organic compounds from organic persecutors
Heterotrophs
A limited number of feeding
Trophic levels
First level in an ecosystem
Primary producers
Trophic levels that consist of heterotrophs
Consumers
Rate at which the organisms in the trophic level consecutively synthesizes new organic matters is the…..
Productivity
Rate at which primary producers breakdown organic compounds
Respiration
Widths of the boxes that are drawn to be proportional to standing crop biomass
Pyramid of biomass
