how many think it is man made or a natural cycle? If it is natural, I think we are speeding it up. The rivers and oceans were thought to be able to handle all that was dumped into them, though since we eat fish and swim in them, it is like messing where we eat. I think it is going to test evolution, and the strong or resistant May survive the warming and pollution.
It is interesting how delicate the balance seems to be, like animals mating and others plan migrations right when eggs will be laid and available for food, and they use some signal when to do which. Might be their hormones or something trigger their actions, and one animal developed a timing that coinscides with what they needs from anothers. It would be interesting if it was just a coincidence. A bird called the Red Knot flies up from S. Am, and doesn't stop till they hit the Delaware Bay and dine on Horshoe Crab eggs that were recently laid, and gorge themselves so they can make it to the Arctic where they nest and mate. Could it be that they flew till they couldn't fly anymore, and just happened to run out of gas, right where the crabs were? Some people would call it an Intelligent Design, but was or is it really? Man needs to think that someone or thing moved the pieces to cause what is, that other forces can't be at work, and if they are, than somone/thing created them. zI think it is the way Things Work, whatever controls them.