the theories of gradual changes that occur in a community following a disturbance
the first producer of energy rich compounds that are later used by other organisms.
the first species to populate in area during succession
type of succession that occurs in a\n area that was only partially destroyed by disturbances
Term used to refer to a type of tree that sheds it's leaves during a particular season of each year
Term used to refer to a tree that produce seed bearing cones and have leaves shaped like needles
Material formed by decaying leaves formed by other organic matter
layer of permanent subsoil found in the tundra
movement of individuals into an area occupied by a existing population
movement of individuals out of an area
largest number of individuals that a particular environment can support
Factor that causes population growth to decrees
Density-the dependent factor
a limiting factor that depends on population density.
Density The Independent Factor
in similar ways regardless of the population density
the scientific study of human population
Farming strategy planting a single highly productive crop year after year
Resources that can be produced or replaced
Non Renewable Resource
A resource that cannot be replenished
The strategic used for natural resources without depleting them and providing human needs without causing environmental harm
lower land productivity caused by farming and over grazing and season climate change.
The structure of forests
Harmful material that can enter the biosphere that can enter through land or water.
the increasing concentration of a harmful substance in organisms in higher trophic levels in food chains or food webs.
The total of the variety of organisms in the biosphere also called biological diversity.
The variety of habitats community and ecological processes in the biosphere
The number of different species that makes up a particular area.
spiting of ecosystems into pieces
small geographic area where a significant number of habitats and species are in immediate danger of extinction.
The total amount of functioning ecosystems needed to both provide the resources or human population uses.
The atmosphere of the ozone gas in which the atmosphere is relatively concentrated.
And protects earth from natural and harmful sunlight rays
Raising of aquatic organisms for human consumption.