The study of interactions among living things, and between living things and their surroundings.

A group of different species that live together in one area.

Includes all of the organisms as well as the climate, soil, water, rocks and other nonliving things in a given area.

A major regional or global community of organisms.

Living things, such as plants, animals, fungi, and bacteria.

Nonliving things such as moisture, temperature, wind, sunlight and soil.

Assortment, or variety, of living things in an ecosystem.

A species that has an unusually large effect on its ecosystem.

Organisms that get their energy from nonliving resources.

Organisms that get their energy by eating other living or once-living organisms.

The process by which an organism forms carbohydrates using chemicals, rather than light, as an energy source.

A model that shows the complex network of feeding relationships and the flow of energy within and sometimes beyond an ecosystem.

Organisms that eat only plants.

Organisms that eat only animals.

Organisms that eat both plants and animals.

Detritivores that break down organic matter into simpler compounds.

Organisms that eat detritus, or dead organic matter.

A consumer that primarily eats one specific organism or feeds on a very small number of organisms.

Organisms that get their energy by eating other living or once-living resources, such as plants and animals .

Levels of nourishment in a food chain.

A model that shows the complex network of feeding relationships and the flow of energy within and sometimes beyond an ecosystem.

Also known as the water cycle, it is the circular pathway of water on Earth from the atmosphere to the surface, below ground and back.

The movement of a particular chemical through the biological and geological, or living and nonliving parts of an ecosystem.

Process of converting nitrogen gas into ammonia by certain types of bacteria.

Measure of the total dry mass of organisms in a given area.

Illustrates the energy flow between trophic levels in an ecosystem.

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Ch 13 Biology

Term	Definition
Ecology	The study of interactions among living things, and between living things and their surroundings.
Community	A group of different species that live together in one area.
Ecosystem	Includes all of the organisms as well as the climate, soil, water, rocks and other nonliving things in a given area.
Biome	A major regional or global community of organisms.
Biotic	Living things, such as plants, animals, fungi, and bacteria.
Abiotic	Nonliving things such as moisture, temperature, wind, sunlight and soil.
Biodiversity	Assortment, or variety, of living things in an ecosystem.
Keystone Species	A species that has an unusually large effect on its ecosystem.
Producer	Organisms that get their energy from nonliving resources.
Autotroph	Another name for producers.
Consumer	Organisms that get their energy by eating other living or once-living organisms.
Heterotroph	Another name for consumers.
Chemosynthesis	The process by which an organism forms carbohydrates using chemicals, rather than light, as an energy source.
Food Chain	A model that shows the complex network of feeding relationships and the flow of energy within and sometimes beyond an ecosystem.
Herbivore	Organisms that eat only plants.
Carnivore	Organisms that eat only animals.
Omnivore	Organisms that eat both plants and animals.
Decomposer	Detritivores that break down organic matter into simpler compounds.
Detritivore	Organisms that eat detritus, or dead organic matter.
Specialist	A consumer that primarily eats one specific organism or feeds on a very small number of organisms.
Generalist	Organisms that get their energy by eating other living or once-living resources, such as plants and animals .
Trophic Level	Levels of nourishment in a food chain.
Food Web	A model that shows the complex network of feeding relationships and the flow of energy within and sometimes beyond an ecosystem.
Hydrologic Cycle	Also known as the water cycle, it is the circular pathway of water on Earth from the atmosphere to the surface, below ground and back.
Biogeochemical	The movement of a particular chemical through the biological and geological, or living and nonliving parts of an ecosystem.
Nitrogen Fixation	Process of converting nitrogen gas into ammonia by certain types of bacteria.
Biomass	Measure of the total dry mass of organisms in a given area.
Energy Pyramid	Illustrates the energy flow between trophic levels in an ecosystem.

Created by: cormicanr

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