Amazon Forest Inventory Network

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Imataca Forest Reserve,

  • June 2013 - July 2014
  • Bolivar, Venezuela
Pintado el POM de arbol Erisma uncinatum (photo: Gerardo Aymard C)

 November-2013 and July 2014- Imataca Forest Reserve, Bolívar, Venezuela

Discriminating harvest of timber species is a noteworthy land use in forested areas throughout the humid neotropics. The Reserva Forestal Imataca (RFI) region, located in northeast portion at Bolivar state, Venezuela represents an excellent example of the long history of a large lowland forests area that have been subjected to discerning logging in the last fifty years. Currently the national-governmental forestry company is managing the Imataca Forest Reserve (ca. 4 millions ha) selecting trees to cut with a DAP > 40-70 cm (ca. 4 trees by ha), this policy will lead to improve the effects including changes in the light regime and forest microclimate, soil compaction, disruption of nutrient cycling and perhaps the long-term changes in tree species composition. Usually the RFI is divided in three regions (North/Center/South) or blocks; the Center portion do not hold permanents plots, therefore In Nov.-2013 and July- 2014 the Rainfor and the national-governmental forestry company joined efforts to establish four plots in the Central region of RTF, two plots in an area 15 years harvested, and the other two pots in an unharvested forest. This is a region characterized by a relative long dry period, however the communities are dominated by numerous evergreen timber species. The plots are found on plains with ultisol soils of moderately-good drainage, and the forest had been undergone a strong selective extraction of Erisma uncinatum (Vochysiaceae), a species known as “Mureillo”. In addition, these forests hold a considerable number of individuals of trees (30-40 m) of Eschweilera subgladulosa (“Majaguillo”), Alexa imperatricis (“Leche de cochino”), Chaetocarpus schomburgkianus (“Cacho”), Catostemma commune (“Baramán”), Pentaclethra macroloba (“Clavellino”), Licania alba (“Hierro”), and Terminalia amazonia (“Pata de danto”). In this work we collected Phragmipedium klotzschianum, an interesting terrestrial orchid, locally common inside the plots, but used to be a rare taxon in the Imataca region.

Text: GERARDO A. AYMARD C.

 

Pentaclethra macroloba (“Clavellino”) (photo: Gerardo Aymard C) Phragmipedium klotzschianum, un orchid terrestrial interesante (photo: Gerardo Aymard C)