, Volume 263, Issue 3, pp 155–162 | Cite as

Biomass and primary-production of herbaceous plant communities in the Amazon floodplain

  • Wolfgang J. Junk
  • Maria Tereza F. Piedade


The increase in biomass of different aquatic and terrestrial herbaceous plant communities was measured during various growth periods in the Amazon floodplain near Manaus. Maximum biomass varied from 4–11.2 t ha−1 dry weight in mixed annual terrestrial communities to 6–23 t ha−1 in aquatic annual species (Paspalum repens, Oryza perennis, Luziola spruceana and Hymenachne amplexicaulis) and 15.6–57.6 t ha−1 in communities of the perennial species Paspalum fasciculatum. Cumulative biomass of 3 successively growing annual species reached 30 t ha−1 a−1. Net primary production is considerably higher than maximum biomass. Paspalum fasciculatum reached 70 t during a growth period of 8 months. If one considers for annual species a monthly loss of 10–25% of the biomass, then net primary production in areas with three successive macrophyte communities and a cumulative maximum biomass of 30 t ha−1 is estimated to reach up to 50 t ha−1 a−1. Annual P/B ratio may reach about 3.

Key words

biomass primary production herbaceous plants Amazonia floodplains 


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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Wolfgang J. Junk
    • 1
    • 2
  • Maria Tereza F. Piedade
    • 1
    • 2
  1. 1.Max-Planck-Institut für Limnologie, Arbeitsgruppe TropenökologieGermany
  2. 2.Instituto Nacional de Pesquisas da Amazônia (INPA)AmazonasBrazil

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