Question: Why does the invasive brown treesnake have a negative effect on the biodiversity of Guam? Need Assignment Help? Question Answer It is venomous and kills forest scientists who study Guam's biodiversity. It eats poultry and causes frequent power outages by shorting out high-voltage wires. It competes with native snakes for nesting sites and prey. It disrupts mutualistic interactions that are necessary for the reproduction of primary producers.