Keystone Species That Live in Ponds, Streams, & Wetlands

Keystone Species That Live in Ponds, Streams, & Wetlands
sku: COM9781680200621USED
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$7.31
Shipping from: Canada
   Description
The same thing is true in nature. Certain species of animals and plants are so important to their ecosystems, that if they disappear, the whole system may collapse. They are called keystone species.
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