INVESTIGADORES
BASTIDAS NAVARRO Marcela Alejandra
artículos
Título:
Effect of the Puyehue-Cordon Caulle volcanic complex eruption on crustacean zooplankton of Andean lakes
Autor/es:
BALSEIRO E.; SOUZA, M. S.; SERRA OLABUENAGA, I.; WOLINSKI, L; BASTIDAS NAVARRO M.; LASPUMADERES, C.; MODENUTTI B.
Revista:
ECOLOGÍA AUSTRAL
Editorial:
ASOCIACIÓN ARGENTINA DE ECOLOGÍA
Referencias:
Lugar: Buenos Aires; Año: 2014 vol. 24 p. 75 - 82
ISSN:
0327-5477
Resumen:
We studied the effect of volcanic ash on the crustacean zooplankton (mainly cladocerans) in the
Andean North-Patagonian lakes that were affected by the eruption of the Puyehue-Cordón Caulle complex.
The study was carried out at three different scales: sub cellular, population and ecosystemic. Cladocerans are
filter feeding organisms that cannot distinguish between food (algae less than 30 μm) and suspended ash,
therefore when feeding they ingest this material. The ash affected negatively the individuals at a biochemical
level, increasing the oxidative stress reacting enzymes like Glutation-S-transferase and the biomarker Acetyl
cholinesterase. At the population level, we recorded a decrease in survival and fecundity, in particular, when
ash concentration exceeded 8 mg/L, we observed that individuals did not reach adulthood. At the ecosystem
level, we recorded a significant decrease of the intermediate trophic level (primary consumers) although
producers were positively enhanced by the eruption. The absence of these primary consumers may affect upper
trophic levels like fishes. Later, in the year following the eruption, we observed the resurgence of zooplankton
populations suggesting a fast recovery from the initial conditions