Seemingly inconsequential changes in sea temperature due to global warming eventually result in declines in fish and seabird populations  A rise of just two degrees prevents the vertical mixing of seawater from different strata  This restricts the availability of upwelling nutrients to phytoplankton
Since zooplankton, which feed upon phytoplankton, feed the rest of the food chain, the declines are inevitable
It is offered in support of the idea that global warming poses a threat to all organisms.