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Ecology Crossword

Across
The scientific study of interactions among organisms and between organisms and their physical environment.
Feed by chemically breaking down organic matter.
Capture energy from sunlight or chemicals and convert it into forms that living cells can use.
The first producers of energy-rich compounds that are later used by other organisms.
Acquire energy from other organisms- by ingesting them in one way or another.
The nutrient whose supply limits productivity.
Shows the relative amount of living organic matter available at each trophic level in an ecosystem.
A group of different populations that live together in a defined area.
Kill and eat other animals.
Any living part of the environment with which an organism might interact.
A group of ecosystems that share similar climates and typical organisms.
All the organisms that live in a place, together with their physical environment.
Down
Chemical energy is used to produce carbohydrates.
Organisms that rely on other organisms for energy and nutrients.
Nitrogen fixing bacteria convert nitrogen gas into ammonia
A group of individuals that belong to the same species and live in the same area.
Any nonliving part of the environment.
Each step in a food chain or web.
The network of feeding interactions in an ecosystem.