Rarity of monodominance in hyperdiverse Amazonian forests

Hans ter Steege*, Terry W. Henkel, Nora Helal, Beatriz S. Marimon, Ben Hur Marimon-Junior, Andreas Huth, Jürgen Groeneveld, Daniel Sabatier, Luiz de Souza Coelho, Diogenes de Andrade Lima Filho, Rafael P. Salomão, Iêda Leão Amaral, Francisca Dionízia de Almeida Matos, Carolina V. Castilho, Oliver L. Phillips, Juan Ernesto Guevara, Marcelo de Jesus Veiga Carim, Dairon Cárdenas López, William E. Magnusson, Florian WittmannMariana Victória Irume, Maria Pires Martins, José Renan da Silva Guimarães, Jean François Molino, Olaf S. Bánki, Maria Teresa Fernandez Piedade, Nigel C.A. Pitman, Abel Monteagudo Mendoza, José Ferreira Ramos, Bruno Garcia Luize, Evlyn Márcia Moraes de Leão Novo, Percy Núñez Vargas, Thiago Sanna Freire Silva, Eduardo Martins Venticinque, Angelo Gilberto Manzatto, Neidiane Farias Costa Reis, John Terborgh, Katia Regina Casula, Euridice N. Honorio Coronado, Juan Carlos Montero, Ted R. Feldpausch, Alvaro Duque, Flávia R.C. Costa, Nicolás Castaño Arboleda, Jochen Schöngart, Timothy J. Killeen, Rodolfo Vasquez, Bonifacio Mostacedo, Layon O. Demarchi, Bruce Hoffman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such “monodominant” forests are known from all of the main tropical regions. For Amazonia, we sampled the occurrence of monodominance in a massive, basin-wide database of forest-inventory plots from the Amazon Tree Diversity Network (ATDN). Utilizing a simple defining metric of at least half of the trees ≥ 10 cm diameter belonging to one species, we found only a few occurrences of monodominance in Amazonia, and the phenomenon was not significantly linked to previously hypothesized life history traits such wood density, seed mass, ectomycorrhizal associations, or Rhizobium nodulation. In our analysis, coppicing (the formation of sprouts at the base of the tree or on roots) was the only trait significantly linked to monodominance. While at specific locales coppicing or ectomycorrhizal associations may confer a considerable advantage to a tree species and lead to its monodominance, very few species have these traits. Mining of the ATDN dataset suggests that monodominance is quite rare in Amazonia, and may be linked primarily to edaphic factors.

Original languageEnglish
Article number13822
Number of pages15
JournalScientific Reports
Volume9
DOIs
Publication statusPublished - 25 Sept 2019

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