Energy in the ecosystem Flashcards
Pyramid of biomass
A graphical representation that shows the total weight of all the organisms at each trophic level within an ecosystem. Producers have the most biomass and then it decreases as you move up the pyramid/ trophic levels as larger populations are needed to support the next trophic level that consumes them
Symbiosis
Close in permanent relationship between organisms
Commensalism
One organism benefits, the other is not affected
Mutualism
Both organisms benefit
Parasitism
One organism benefits, the other is harmed
Birth rate
Number of life births in a population over a set time
Death rate
Number of deaths in a population over a set time
Immigration
Movement of Individuals  into a population or area (I-into)
Emmigration
Movement of individuals out of a population or area, E for exit
Exponential growth
As the population gets larger it also grows faster. J shaped curve. Ideal conditions.
Logistic growth
Population growth and size levels off because of limiting factor. S shaped curve, realistic conditions
Carrying capacity
Number of organisms of one species that environment can support at a given time
Limiting factor
Something that causes population growth to decrease, can be density dependent or independent
Biomagnification
Concentration of a harmful substance increase in organisms at higher trophic Levels. For example, pesticides and water sources caused decline an equal population
Bio diversity
The total of all the different organisms in the biosphere; the more biodiversity in an ecosystem the healthier it is. Greatest natural resource for humans by Providing food, industrial products, medicines, etc.
