An in situ test to explore the responses of Scenedesmus acutus and Lepocinclis acus as indicators of the changes in water quality in lowland streams

Ultrastructural Alterations in Lepocinclis acus (Euglenophyta) Induced by Medium with High Organic Matter Content

“…In addition to these publications and what many authors have previously reported (Van Oye, 1924;Conrad, 1943;Conforti, 1998;Bauer et al, 2012), it is possible to confirm based on our observations, once again, that paramylon grains have little diagnostic value as species-specific characters in euglenoids. Their morphology and number, as well the cell dimensions can change based on environmental conditions, so these three diagnostic characters should be taken with caution when describing new or identifying know species.…”

“…L. acus and other euglenoids species cultured or sampled in enriched medium and studied with light microscopy (Haughey, 1970;Conforti, 1998;Bauer et al, 2012;Nannavecchia et al, 2014) showed important morphological changes that were related to an increase in the number or size of paramylon grains. Precise biometric measurements have revealed significant statistical differences in the dimensions and number of the grains between the treated and control specimens.…”

Impacto de la contaminación orgánica sobre el fitoplancton de un arroyo de la llanura pampeana

“…Estos organismos liberan metabolitos (e.g., vitaminas) que favorecen el desarrollo de euglenofitas en cuerpos de agua con estas características. Por otro lado, estudios realizados sobre Lepocinclis acus y Phacus brachykentron demostraron que existe una relación entre la concentración de materia orgánica y la deformación de la morfología celular original (Conforti 1998;Bauer et al 2012;Nannavecchia et al 2014;Nannavecchia 2016). …”

“…Los cambios observados en Lepocinclis acus y Phacus longicauda coinciden con los observados en algunas especies por Conforti (1998), Bauer et al (2012), Nannavecchia et al (2014) y Nannavecchia 2016. En estos trabajos, las modificaciones se explican como respuesta al exceso de materia orgánica en el ambiente, lo cual coincide con las características generales del sistema estudiado.…”

Biomarkers of Freshwater Algae Lemna minor as a Model for Urban Pollution with Pesticides and Heavy Metals

“…fish in Australia, Asia and America (Edwards et al, 2001;Ueno et al, 2005;Carrasco-Letelier et al, 2006), land snails (Reogli et al, 2006;Radwan et al, 2010;Abdel-Halim et al, 2013), macroalgae (Fytianos et al, 1999;SanchezRodrignez et al, 2001;Conti and Cecchetti, 2003) and microalgae (Siripornadulsil et al, 2002;Nishikawa et al, 2003;Pinto et al, 2003;Tripathi et al, 2006). Moreover, biochemical responses of the organisms exposed to POP s , PAH s and pesticides have been reported for the last two decades and documented by the international organizations such as Economic Corporation and Development (OECD) and the United States Environmental Protection Agency (USEPA) which recommended to use algae because of their wide distribution and their sensitivity with respect to the environmental evaluation of freshwater ecosystems (Bauer et al, 2012). CONCLUSION The obtained results of this study may provide information about the role of freshwater algae in biomonitoring of urban pollution with chemical contaminants.…”