During the early 1950's, the forest coverage in the Guatemalan Pacifi coast was reduced dramatically, from 578 km2 of forests in 1965, the area was only 96 km2 in 1978. In 1965, there were 23,407 ha of mangroves in the Guatemalan Pacific, of which only 16,086 ha still existed in 1978.
There are three regions the pacific coast that still have a considerable amount of mangroves: Monterrico, Las Lisas and Manchón Guamuchal-Finca Tamashan. (Gomez,1995). According to Mr. Francisco Javier Espinoza M.'s thesis from the Universidad San Carlos in Guatemala, we can determine, using Landat satellite images from 1974 to 2010, that the mangrove forests in Manchón Guamuchal-Finca Tamashan private reserve have grown since 1988 (Figure No. 11) and have been reduced in the other areas due to the local population's demands for construction material and firewood. Mr. Espinoza attributes the growth of the mangrove forest to the creation of canals, designed and paid for by the owner to drain excess rainwater and to supply the Finca Tamashan S.A.'s shrimp farm.
Since 1995, when Manchón Guamuchal-Finca Tamashan was declared a Specially Protected Area, it's mangrove covergae has grown from 67 km2 to 77 km2 at the end of 2010. All of this thanks to private investments by part of Finca Tamashan and the constant technical support of the INAB, to monitor the forest and finding ways of harvesting it in new areas.