Deforestation was a rampant problem in Costa Rica, as Alan Grant witnessed as he was in the helicopter. He witnessed ‘acre after acre’ of denuded hills, and Hammond lamented that it was such a problem even though Costa Rica was ahead of its neighbors when it came to population control. The main concern was that the biodiversity of Costa Rica was being depleted, with many of the species being forced out of the forests due to the encroachment of the logging industries. As they were forced to rapidly adapt to new habitats, so was their behavior altered as well from the shock and trauma.
Jurassic Park by Michael Crichton page 21,25,76 (First Edition, Thirty Fourth printing)