Hydrobiologia

, 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
Article

Abstract

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 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Furch, K. & W. J. Junk, 1992. Nutrient dynamics of submersed decomposing Amazonian herbaceous plant species Paspalum fasciculatum and Echinochloa polystachya. Rev. Hydrobiol. trop. 25: in press.Google Scholar
  2. Howard-Williams, C. & W. J. Junk, 1976. The decomposition of aquatic macrophytes in the floating meadows of a central Amazonian Várzea lake. Biogeographica 7: 115–123.Google Scholar
  3. Junk, W. J., 1970. Investigations on the ecology and production-biology of the ‘floating meadows’ Paspalo-Echinochloetum on the Middle Amazon. I. The floating vegetation and its ecology. Amazoniana 2: 449–495.Google Scholar
  4. Junk, W. J., 1986. Aquatic plants of the Amazon system. In: B. R. Davies & K. F. Walker (eds), The Ecology of River Systems. Dr W. Junk Publishers, Dordrecht: 319–337.Google Scholar
  5. Junk, W. J., 1992. Wetlands of tropical South-America. In: Whigham, D. (ed.): Wetlands of the world.Google Scholar
  6. Junk, W. J. & C. Howard-Williams, 1984. Ecology of aquatic macrophytes in Amazonia. In: Sioli, H. (ed.), The Amazon: limnology and landscape ecology of a mighty tropical river and its basin. Dr W. Junk Publishers, Dordrecht: 269–293.Google Scholar
  7. Junk, W. J. & K. Furch, 1991. Nutrient dynamics in Amazonian floodplains: Decomposition of herbaceous plants in aquatic and terrestrial environments. Verh. int. Ver. Limnol. 24: 2080–2084.Google Scholar
  8. Junk, W. J. & M. T. F. Piedade, 1992. Herbaceous plants of the Amazon floodplain near Manaus: Species diversity and adaptations to the floodpulse. Amazoniana 12(3/4): in press.Google Scholar
  9. Junk, W. J., P. B. Bayley & R. E. Sparks, 1989. The flood pulse concept in river-floodplain systems. In: Dodge, D. P. (ed.): Proceedings of the International Large River Symposium (LARS). Can. Spec. Publ. Fish. aquat. Sci. 106: 110–127.Google Scholar
  10. Piedade, M. T. F., W. J. Junk & S. P. Long, 1991. The productivity of the C4 grass Echinochloa polystachya on the Amazon floodplain: Ecology: 1456–1463.Google Scholar

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

Personalised recommendations