North American lakes 'jellify' as calcium levels decline
from Science World Report
Your lakes may be turning into jelly. Scientists have found that as calcium levels continue to decline in soft-water lakes, certain organisms are also disappearing and being replaced by jelly-like creatures. Due to prolonged periods of acid rain and timber harvesting, may soft-water lakes in North America are experiencing declining calcium levels. This, in turn, has caused ecosystems to shift. The animals that have calcium requirements, such as the water flea Daphnia, are being replaced by other animals.
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