What conclusions do you think liz made about the cause of population declines in marine iguanas?

Liz may have have concluded two possible reasons on the population declines of marine iguanas in the Galapagos Islands. One, it has something to do with the changing climate conditions (El Nino phenomenon) in the islands. The weather conditions have affected the algae that the marine iguanas eat. And two, the changing climate conditions are held responsible in the increase in the population of hawks that feed on the marine iguanas.