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|Title:||Biomass and primary-production of herbaceous plant communities in the Amazon floodplain|
|Authors:||Junk, Wolfgang Johannes|
Piedade, Maria Teresa Fernandez
Brazil, Amazon River
South America, Amazonia
|metadata.dc.relation.ispartof:||Volume 263, Número 3, Pags. 155-162|
|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. © 1993 Kluwer Academic Publishers.|
|Appears in Collections:||Artigos|
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