Bio104 unit 3

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Law of Tolerance

populations have optimal survival conditions within critical minimal and maximal thresholds.

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autotroph

Organisms that can produce their own food using energy from the sun or chemicals are called autotrophs. They are also known as producers and form the base of the food chain. Examples include plants, algae, and some bacteria.

Biome

 an area classified according to the species that live in that location

Carrying Capacity

The size of a population allowed by all of the limiting factors

Commensalism

Relationship between two organisms where one benefits and the other does not benefit but is not harmed

Limiting Factors

Anything that constrains a population and slows or stops it from growing.

Deciduous

Trees that annually lose their leaves

Density

Concentration of individuals within a species in a specific locale.

Dispersion

the  scattering of organisms over periods within a given area or over the Earth.

Distribution

How a population is spread out throughout their habitat.

Fecundity

An individuals ability to reproduce

Heterotroph

an organism that cannot produce its own food and relies on consuming other organisms or organic matter to obtain nutrients and energy

R strategist

Lives in an unstable and unpredictable environment, many offspring, low survival rate

K strategist

Lives in stable environment, few offspring, high survival rate

Type 1 Survivorship curve

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Type 2 Survivorship curve

Type 3 Survivorship curve

Mutualism

An interaction between two or more organisms where both have a net benefit.

mychorrizae

fungi that have a symbiotic relationship with the roots of many plants, fungal root

Parasitism

A relationship between organisms when one lives on or inside of the other and harms it while gaining for itself