Intensive field sampling increases the known extent of carbon-rich Amazonian peatland pole forests

Eurídice N. Honorio Coronado, Adam Hastie, José Reyna, Gerardo Flores, Julio Grández, Outi Lahteenoja, Frederick C. Draper, Christine M. Åkesson, Timothy R. Baker, Rupesh K. Bhomia, Lydia E.S. Cole, Nállarett Dávila, Jhon Del Aguila, Margarita Del Aguila, Dennis Del Castillo Torres, Ian T. Lawson, Manuel Martín Branas, Ed T.A. Mitchard, Abel Monteagudo, Oliver L. PhillipsEliseo Ramírez, Marcos Ríos, Sandra Ríos, Lily Rodriguez, Katherine H. Roucoux, Ximena Tagle Casapia, Rodolfo Vasquez, Charlotte E. Wheeler, Mariana Montoya

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Peatland pole forest is the most carbon-dense ecosystem in Amazonia, but its spatial distribution and species composition are poorly known. To address this knowledge gap, we quantified variation in the floristic composition, peat thickness, and the amount of carbon stored above and below ground of 102 forest plots and 53 transects in northern Peruvian Amazonia. This large dataset includes 571 ground reference points of peat thickness measurements across six ecosystem types. These field data were also used to generate a new land-cover classification based on multiple satellite products using a random forest classification. Peatland pole forests are floristically distinctive and dominated by thin-stemmed woody species such as Pachira nitida (Malvaceae), Platycarpum loretense (Rubiaceae), and Hevea guianensis (Euphorbiaceae). In contrast, palm swamps and open peatlands are dominated by Mauritia flexuosa (Arecaceae). Peatland pole forests have high peat thickness (274 ± 22 cm, mean ± 95% CI, n = 184) similar to open peatlands (282 ± 46 cm, n = 46), but greater than palm swamps (161 ± 17 cm, n = 220) and seasonally-flooded forest, terra firme, and white-sand forest where peat is rare or absent. As a result, peatland pole forest has exceptional carbon density (1,133 ± 93 Mg C ha-1). The new sites expand the known distribution of peatland pole forest by 61% within the Pastaza-Maranón Foreland basin, mainly alongside the Tigre river, to cover a total of 7540 km2 in northern Peruvian Amazonia. However, only 15% of the pole forest area is within a protected area, whilst an additional 26% lies within indigenous territories. The current low levels of protection and forest degradation but high threat from road paving projects makes the Tigre river basin a priority for conservation. The long-term conservation of peatland pole forests has the potential to make a large contribution towards international commitments to mitigate climate change.

Original languageEnglish
Article number074048
JournalEnvironmental Research Letters
Issue number7
StatePublished - Jul 2021
Externally publishedYes


  • Google Earth Engine
  • RAMSAR sites
  • carbon density
  • dominant species
  • indigenous communities
  • natural resources
  • peatland degradation


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