What would happen to abiotic and biotic factors in galapagos islands if galapagos marine iguana disappeared

The whole habitat will be different and affected for good.

Explanation:

Alike wolves affect and effect the natural woods landscape(as it was not believed before studied carried out by scientists) these consequences will be in the affectations of the whole Fernandina and Isabella islands where these common living organisms would severely affect and destroy the natural resources and abiotic and biotic factors with unsuspected consequences as resulted on those forests like total erosion.

answer; cattle ranching on the savanna,and forestry in the amazon;