Timeline
1917
Laguna Catemaco is declared Patrimonio Nacional (national patrimony)

1937
The valley of Laguna Catemaco is declared a federal protected zone, encompassing about 28,500
hectares.

1967
The National University of Mexico founds the Los Tuxtlas Tropical Biology Station, now encompassing
640 hectares.

1979
Around Volcano San Martin Tuxtla, about 5,533 hectares are declared a federal protected zone.

1980
The Sierra Santa Marta, about 83,000 hectares, is declared a federal protected zone.

1989
The University of Veracruz acquires 220 hectares near Nanciyaga and builds a Flora & Fauna research
center

1991
The Grupo Ecologico Veracruzano de Rescate, A.C. acquires 300 hectares in the Santa Marta´s near
Miguel Hidalgo

Between 1990 and 1995
Nanciyaga and La Jungla, both on the shore of Laguna Catemaco declare their properties reserves.

1998
The state of Veracruz expropriates 6,318 hectares in the Sierra Santa Marta.

1998
A presidential decree expropriates 9,366 hectares in the Sierra Santa Marta, overlapping all of the state
expropriations.

1998, November 13th
A presidential decree combines the previously protected federal zones, except Laguna Catemaco,
throws in the expropriated lands, and draws an even bigger polygon to form the Los Tuxtlas Biosphere,
155,123 hectares in total.

1998
Speech of Presidente Zedillo on inauguration of the Biosphere

2003
Veracruz State attempts to hand over management of Biosfera  to Custodios de la Selva. Failed!

2004
First management plan for the Biosphere is proposed

2006
Consejo Asesor de la Reserva de la Biosfera - Los Tuxtlas is established.
As of 2009 that council seems to be defunct.

2008
Final Management Plan published
Los Tuxtlas Biosphere Reserve
Veracruz, Mexico