ecology

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27 Terms

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Ecology

The study of living things and their interactions with each other and their environment

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Ecosystem

A characteristic community of interdependent species interacting with the abiotic components of their environment

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Population

All the members of a species interacting a specific area that can breed with each other

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Community

All the members of all species in an area

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Habitat

The place in an ecosystem where an organism lives

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Niche

The role of an organism in an ecosystem , usually a Feeding role

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Biotic

All the living and organic components of an ecosystem

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Abiotic

All the non living parts of an ecosystem

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Immigration

Moving isn’t a new habitat of the same species

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Emigration

Moving out of a habitat of the same species

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Intraspecific

Competition between individuals of the same species

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Interspecific

Competition between members of different species

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Lag phase

Synthesis of proteins, enzymes, aa, cell growth, sexual maturity is reached

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Log phase/exponential

Exponential growth,doubling of population per unit time

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Stationary phase

Nutrients are reduced , accumulation of waste , carrying hapacity is reached there is increased enviormental resistance , population growth= population death

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Enviormental resistance

Density-dependent or density-independent factors that slow/limit th growth o the population.

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Density dependent

Depends on the population size, DISEASE/FOOD AVABILITY /CMPETITION

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Density independent

Doesn’t depend on the population size, temp light intensity

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Succession

The change in structure and species composition of a community over time

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Sere

The different stages in a succession when particular communities dominate

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Zeroes

A plant succession that is limited by water avability

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Hydrosere

Succession bringing in pods, lakes or elsewhere in water

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Climax community

The inal and stable stage, endpoint of succession no further change , at equilibrium

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Formula for potosyinthetic efficiency

Pe=quantity of energy incorporated into product/quantity of energy falling on the plant x100

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Why is not all the light absorbed by photosynthetic pigments?

Some is the wrong wavelength

Som are transmitted straight through the leaf

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Gross primary productivity(GPP)

Rate at which light energy is converted to chemical energy in photosynthesis

-eg producingglucose

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Net primary productivity(NPP)

Energy in the plants biomass which is available to primary consumers