Examlex
If real GDP is greater than nominal GDP for a particular year, then
Keystone Species
An essential species in an ecosystem that plays a key role in maintaining the balance, wherein its elimination would cause dramatic shifts in the ecosystem's dynamics.
Nutrient Cycling
The movement and exchange of organic and inorganic matter back into the production of living matter.
Resource Availability
The level of availability of various resources (natural, economic, human, etc.) that can be accessed or utilized by organisms, individuals, or societies.
Keystone Species
A species whose presence and role within an ecosystem have a disproportionate effect on the environment relative to its abundance.
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