Some plants actually thrive in soils that most plants find challenging.  One example is the California redbud which grows on serpentine soil (a soil type high in toxic magnesium and nickel but low in calcium).  Some of these species even need to be grown in the unusual soils to survive.  Others can tolerate more standard soil conditions.    If you wanted to grow some of these unusual plants in their native soil, what is one risk to you as the gardener?  How does tolerance to such (normally toxic) soil help the plant?

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Conservation Biology

The study of how to prevent the loss of biological diversity on the planet is called conservation. Biological diversity, also termed biodiversity, consists of various life forms found in a specific location or across the entire planet, including ecosystems, species, populations, and genes. Conservation thus aims to protect the diversity of life at all levels of biological organization.