Protecting threatened Over-seas biodiversity

First monitoring of treated broad-leaved paperbarks!

On December 6 and 11, 2019, the GEPOG teams carried out the first monitoring follow-up of the 200 broad-leaved paperbarks treated in November.

Broad-leaved paperbark monospecific forest © GEPOG

Broad-leaved paperbarks

The broad-leaved paperbark is considered one of the most problematic invasive exotic plant species for the conservation of Guyana’s coastal savannas. Imported from Australia, this species darkens open spaces and invades savannahs. Its ability to resist fires and produce more than 20,000,000 seeds per year makes broad-leaved paperbark a formidable and invasive species, threatening the Guyanese savannahs.

The protocol

In order to know the optimal management method to correctly manage this species, GEPOG carried out management tests in November on 200 individuals of broad-leaved paperbarks. Thus, all the trees identified were cut, annealed and treated with different herbicides. Follow-up is therefore carried out regularly to ensure the efficiency of the protocols in place.
This operation, carried out on Space Center grounds within the framework of Life BIODIV’OM, aims in 2020 to highlight the most effective methods for managing this invasive exotic species and limiting its expansion.

First inspection in December 2019

On December 6 and 11, 2019, the first post-treatment follow-up of the broad-leaved paperbarks of the Space Center took place. The GEPOG teams looked closely at the crowns and stumps, estimated the leaf cover and counted the number of shoots on the stumps and trunks.
This follow-up also made it possible to take a look at the individuals treated in September when the American experts came from Florida, in order to follow their evolution, and to verify that the individual markings last over time and remain visible.

Regular visits should allow GEPOG to compare the efficacy of different treatments, and to draw conclusions about the best methods to follow to manage this invasive exotic tree.