Afood web is shown above. what would most likely happen in this ecosystem if the shark population significantly increased?

Most probably the shark´s favorite food down the chain will be diminished, creating an imbalance in the ecosystem which in terms will affect all the other species living in that ecosystem.  

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this