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Acid Rain Threatens Crayfish
Canadian scientists have released a new study on what they call "aquatic osteoporosis" and its drastic effect on declining crayfish populations and aquatic life in the lakes in and around Algonquin Provincial Park.

The researchers found that depleted calcium levels have now driven some crayfish populations to near extinction.

The pH levels are changing in many lakes but the calcium reserves are no longer present in the soil to replenish the lake. Crayfish have a particularly high calcium requirement because of their hard exoskeleton and their extinction could cause a ripple effect with severe consequences on other aquatic species.


 
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Harvester Fleet Ready to Battle Weeds on Yahara Lake - Dane County's fleet of 13 weed harvesters is motoring up to cut and remove tons of aquatic plants in the Yahara chain of lakes this summer, a continuation of a program to try and reduce lake flooding and lower the amount of algae-producing phosphorus.


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