INVESTIGADORES
IZAGUIRRE Irina
artículos
Título:
Comparison of morpho-functional phytoplankton classifications in human-impacted shallow lakes with different stable states
Autor/es:
IZAGUIRRE, I.; ALLENDE, L.; ESCARAY, R.; BUSTINGORRY, J.; PÉREZ, G.; TELL, G.
Revista:
HYDROBIOLOGIA
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2012 vol. 698 p. 203 - 216
ISSN:
0018-8158
Resumen:
The morpho-functional classifications of
phytoplankton have been recently proposed as useful
tools in the aquatic biomonitoring. In this study, we
compared three different classifications in a range of
different environmental conditions, a set of six
shallow lakes with different stable states. The studied
lakes are located in the Pampa Plain from Argentina, a
region highly impacted as a consequence of the human
activities. Among the selected lakes, three are in a
turbid state, two of which have high phytoplankton
abundances (phytoplankton-turbid), and one shows a
high concentration of suspended inorganic matter
(inorganic-turbid). Two lakes are clear and profusely
colonized by submerged plants (clear-vegetated).
Only one lake shows a typical alternative steady-state
behavior, shifting turbid periods of high phytoplankton
biomass with periods of more transparency and
development of submerged macrophytes. We compared
the three morpho-functional classifications
applied by means of multivariate analyses in order to
explore how much the variance of the biomass of the
phytoplankton functional groups (for each functional
classification) was explained by the environmental
variables. The analyses performed showed a clear
separation of the human-impacted turbid lakes from
the clear-vegetated lakes. The advantages and disadvantages
of the different morpho-functional classifications
are discussed, concluding that the functional
approach is adequate to analyze the phytoplankton
communities in aquatic systems subjected to anthropogenic
influence and for monitoring them.