Why are so many animals dying? More mass death events occurring now than ever before, study claims

• Three US institutions say mass die-offs are now more common
• They have increased by one event per year for 70 years
• Although not as deadly as an extinction they can kill 90% of a population 
• Reasons include human intervention and climate factors
• The worst cases were the result of multiple causes
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  Biotoxicity triggered by events such as algae blooms accounted for a significant proportion of deaths (stock image shown), and processes directly influenced by climate - including weather extremes, thermal stress, oxygen stress or starvation - collectively contributed to about 25 percent of mass mortality events
  
  Read more: http://www.dailymail.co.uk/sciencetech/article-2908325/Why-animals-dying-mass-death-events-occurring-study-claims.html#ixzz3OoBaahBO