Over the last century, which cycle has had the greatest effect on cycles of salmon production in the North Pacific?
A) El Niño Southern Oscillation (ENSO)
B) Pacific Decadal Oscillation (PDO)
C) Sunspot activity cycle
D) Lunar cycle

Question

Quizplus · Accepted Answer

The Pacific Decadal Oscillation (PDO) has had the greatest effect on salmon production cycles in the North Pacific over the last century, as it influences ocean temperatures and conditions that are critical for salmon survival and reproduction.

Over the Last Century, Which Cycle Has Had the Greatest