Observación de microorganismos de auga doce / Observation of freshwater microorganisms

Durante a nosa visita ao rio Lamas recollemos varias mostras de auga e sedimentos para a súa posterior observación no laboratorio.O grupo de alumnos de 2º de ESO está a traballar na aula a unidade didáctica relativa aos ecosistemas e resúltalles moi doado recoñecer as diferentes formas de vida que se poden observar a simple vista no ecosistema do río. Con esta actividade pretendemos achegalos á observación dos seres vivos “que non se ven” pero que tamén teñen a súa función nos ecosistemas acuáticos. Realizamos unha observación directa ao microscopio óptico das diferentes mostras e observamos a presenza de numerosas formas de vida, entre as que recoñecemos sen dificultade diferentes tipos de protozoos e algas: Colpidium, Paramecium, Chlorella, Euglena,Closterium, Synura e diferentes tipos de diatomeas
During our visit to the river Lamas we collected several water and sediment samples for later analysis in the laboratory. The group of students in 2nd ESO is working in the classroom on  the teaching unit on ecosystems and they find it very easy to recognize the various forms of life that can be seen with the naked eye in the river ecosystem. With this activity we intend to get them to a closer observation of living things "unseen" but also have their role in aquatic ecosystems. We performed a direct observation under the microscope of the different samples and observed the presence of many forms of life, including these,  we recognized without difficulties different types of protozoa and algae: Colpidium, Paramecium, Chlorella, Euglena, Closterium, Synura and different 
type of diatoms