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RC5

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Across
Two populations that benefit from one another and often depend on each other for survival
The network of energy sources in an ecosystem
Two populations that struggle against each other for the same resources in an ecosystem
Converted to usable form by lightning and bacteria; plants uptake nitrates from the soil
Organisms that are the first to rebuild in ecological succession, such as lichens
All biotic and abiotic things, conditions, and interactions in a defined area
One population benefits from another population, often while harming it
Creates its own food directly from solar energy through photosynthesis
Obtains its food from consuming other animals
Down
The number and variety of species and populations in an ecosystem
Obtains its food from consuming other plants
The number of organisms of the same species that live in a defined area and make up the breeding group
One population benefits from another population without effecting it
classification of organisms by feeding relationships in hierarchal order
Obtains its food from consuming both plants and animals
Breaks down the nutrients in dead organisms for its food
One population captures and feeds on another population
must get its energy by consuming other organisms