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Biology Ecology

Across
Organisms that kill and eat other organisms
Group of individuals of the same species that live in the same area
Process of converting nitrogen gas into nitrogen compounds that plants can use
Organism that eats both plants and animals
Each step in a food chain or food web
Illustration of the relative amounts of energy or matter contained within each trophic level of a food web or food chain
Assemblage of different populations that live together in a defined area
Organisms that cannot directly harness energy from the sun. These organisms have to ingest energy.
Organism that captures energy from sunlight and converts it into forms of energy the organism can use
Floating algae that go thru photosynthesis
A group of ecosystems that share similar climates and organisms
Total amount of living tissue within a given trophic level
Down
Bacteria and fungi that break down materials
Physical or nonliving factor that shapes an ecosystem
Organism that only eats plants
Process by which bacteria convert nitrates into nitrogen gas
Nutrient whose supply limits productivity
Any living part of the environment with which an organism might interact
The study of organisms and how they interact with each other and their environment
Area of the earth that consists of all living things
Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
Network of complex interactions formed by feeding relationships