Publications des scientifiques de l'IRD

Bomfim E. D., Kraus C. N., Lobo Mtmps, Nogueira I. D., Peres L. G. M., Boaventura G. R., Laques Anne-Elisabeth, Garnier J., Seyler Patrick, Marques D. M., Bonnet Marie-Paule. (2019). Trophic state index validation based on the phytoplankton functional group approach in Amazon floodplain lakes. Inland Waters, 9 (3), p. 309-319. ISSN 2044-2041.

Titre du document
Trophic state index validation based on the phytoplankton functional group approach in Amazon floodplain lakes
Année de publication
2019
Type de document
Article référencé dans le Web of Science WOS:000490984200005
Auteurs
Bomfim E. D., Kraus C. N., Lobo Mtmps, Nogueira I. D., Peres L. G. M., Boaventura G. R., Laques Anne-Elisabeth, Garnier J., Seyler Patrick, Marques D. M., Bonnet Marie-Paule
Source
Inland Waters, 2019, 9 (3), p. 309-319 ISSN 2044-2041
Many trophic indices have been constructed for temperate aquatic environments, but few have proved reliable for tropical environments. Indices constructed on the basis of nutrients may not be effective for describing the trophic state because the fractions of nitrogen and phosphorus differ in their potential to predict the nutrient limitation in tropical aquatic environments. We developed an index based on the phytoplankton Reynolds functional groups for an Amazonian floodplain lake from samples collected during 2 contrasting hydrological periods (rising and flushing) and compared it with the index initially proposed by Carlson in 1977 and further adapted to tropical environments by Toledo in 1990. The functional group and Carlson indices matched only 37% and 56% of the sample units collected during the rising and flushing periods, respectively. Our study confirms the difficulty of assessing trophic states using only phosphorus and chlorophyll a in tropical floodplain lakes. In this environment (1) nitrogen may significantly limit phytoplankton growth and (2) complex phytoplankton-nutrient relationships occur during the hydrological cycle that cannot be accounted for through a simple phosphorus and chlorophyll a formula.
Plan de classement
Ecologie, systèmes aquatiques [036] ; Hydrologie [062]
Description Géographique
BRESIL ; AMAZONIE ; PARA ; CURUAI BASSIN
Localisation
Fonds IRD [F B010077151]
Identifiant IRD
fdi:010077151
Contact