Declining calcium is harming native crayfish

October 29, 2015 – Researchers at the Dorset Environmental Science Centre (DESC) and Queens University have linked the localized near-extinction of a native crayfish species in four lakes in Algonquin Park to declining calcium levels.

Crayfish physical structure including an exoskeleton that is primarily composed of calcium carbonate means they rely on certain levels calcium to survive. The researchers found that lack of calcium in the lakes has contributed to a decline in crayfish populations.

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Terry ReesDeclining calcium is harming native crayfish