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Invasive species

In Brazil, the jackfruit can become an invasive species as in Brazil's Tijuca Forest National Park in Rio de Janeiro or at the Horto Florestal in neighbouring Niterói. The Tijuca is mostly an artificial secondary forest, whose planting began during the mid-nineteenth century; jackfruit trees have been a part of the park's flora since it was founded.

The species has expanded excessively because its fruits, which naturally fall to the ground and open, are eagerly eaten by small mammals, such as the common marmoset and coati. The seeds are then dispersed by these animals, spreading jackfruit trees that compete for space with native tree species. The supply of jackfruit has allowed the marmoset and coati populations to expand. Since both prey opportunistically on bird eggs and nestlings, the increases in marmoset and coati populations are detrimental to local birds.