Chapter 4 Flashcards
Biodiversity
of species living in an ecosystem
Living portion of the water cycle
Plants taking up water up from the roots
Why do food chains only go up to a certain level?
Too much energy is lost to permit more levels
The process of succession varies depending on
The initial environmental conditions and chance
Conversion of nitrate to nitrogen gas is called
Denitrification
Habitat
The place where a particular population of a species lives
Community
The many species that live together in a habitat
Ecosystem
A community and all of the physical aspects of its habitat
Herbivores
Animals at the second trophic level that eats plants
Carnivores
Animals at the third trophic level that eat other animals
Abiotic factors
Physical aspects of an ecosystem (soil,water, weather)
Energy pyramid
Amount of energy stored at each level determines the width of each block
Energy passed on from a lower trophic level to a higher trophic level is about _________ from what it originally was
10%
The process of combining nitrogen gas with hydrogen to form ammonia is called
Nitrogen fixation
5 stages of nitrogen cycle
Nitrogen fixation, ammonification, nitrofication, assimilation, dentrification