What does a decrease in salmon population due to an increase in river temperature indicate? A an unchanging biological community
B change in population but not abiotic factors
an abiotic factor changing an biotic factor
D an effect of predation

Why are electrical outputs from a turbine generator highest during a spring tide? a high tide comes in faster. the gravitational pull of the moon is less. the sun and the moon pull in opposite directions. the difference between high tide and low tide is the greatest.