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Environmental Changes and Food Chains Crossword

Across
An organism that gets energy by breaking down the bodies of dead plants and animals, and produces soil as a waste product
An organism that uses energy from sunlight to produce food
This animal was introduced to Australia in the 1800s and became an invasive species there.
When humans introduce a new plant or animal into an ecosystem, it is an _________ species.
If the ___________ that eats an organism is removed from the ecosystem, that organism's population will likely increase.
The name of the book published by Rachel Carson in 1962 which brought attention to the negative effects DDT had on the environment (2 words)
The effect or change that something has on other things
If a species of plant or animal lives in an ecosystem due to nature, and not because humans introduced it there, it is called a _________ species.
The name for all the living and nonliving things in an area
Down
The number of organisms in an ecosystem that belong to the same species
The maximum number of organisms that an environment can support (2 words)
Producers are ________ as well as some bacteria.
Another word for bad or negative effects
The space, conditions, and living and nonliving things surrounding an organism
All the living organisms in an ecosystem
The arrows in a food chain or food web represent the flow or transfer of _________.
Two of the same type of organism, which can reproduce together, belong to the same ________.
A pesticide that was used in the United States in the mid-1900s to protect crops from insects
This is a fossil fuel that is sometimes leaked from boats, causing harmful effects to the marine and coastal ecosystems.