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| Modenutti,Beatriz; Albariño,Ricardo; Bastidas Navarro,Marcela; Díaz Villanueva,Verónica; Souza,María Sol; Trochine,Carolina; Laspoumaderes,Cecilia; Cuassolo,Florencia; Mariluán,Gustavo; Buria,Leonardo; Balseiro,Esteban. |
| North Andean Patagonian aquatic systems include a number of deep and shallow oligotrophic lakes with a profuse hydrographic net. In this contribution we present a review of the researches carried out during the last decade in the food webs of North Patagonian water bodies. Food webs in these systems were studied based on field surveys, combining with field and laboratory experiments. Deep and shallow lakes were analyzed in relation to light, organic matter, and nutrient constraints as limiting interacting factors. In addition, we have also extended our knowledge on the structure and dynamics of stream food webs by analyzing different aspects of biotic interactions occurring both through the autotrophic and heterotrophic pathways. Since Andean lakes were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacterioplankton; Phytoplankton; Zooplankton; Fish; Insects; Lakes and rivers. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2010000200003 |
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| Gonçalves,Rodrigo J; Souza,María Sol; Aigo,Juana; Modenutti,Beatriz; Balseiro,Esteban; Villafañe,Virginia E; Cussac,Víctor; Helbling,E Walter. |
| In the last decades, both temperature and UVB (280-315 nm) radiation on the surface of the Earth increased at growing rates as a result of human activities. Many studies had evaluated the effects of temperature on aquatic ecosystems, but now the field broadens as the combination and variations of temperature and radiation gains especial importance. In this work we attempt to revisit some of our knowledge about the effects of UVR and temperature on marine and freshwater plankton and fish from temperate regions (defined here as latitudes between 30-60º), especially from the Patagonia area, due to the special characteristics found in these sites. UVR affects (often negatively) almost all processes, from carbon fixation to behavior; and certainly all trophic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate change; Bacterioplankton; Phytoplankton; Zooplankton; Fish; Oxidative stress; Upper mixed layer. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2010000200005 |
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| Balseiro,Esteban; Souza,María S.; Serra Olabuenaga,Ignacio; Wolinski,Laura; Bastidas Navarro,Marcela; Laspoumaderes,Cecilia; Modenutti,Beatriz. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volcanic ash; Cladocerans; Oxidative stress; Survivorship; Trophic level. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2014000100009 |
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