Water life

Now let's look in the microscope again: Look at this tiny little creature - doesn't it look like a sun? Scientists gave it the name Actinophrys and put it in the heliozoan protists group. Each Actinophryid is uni-cellular, with a spherical shape. They eat flagellates, diminutive cilates, and microscopic algae Amoebae have no definite shape. Amoeboids have one nucleus. Look at the commonly found single-celled organism Euplotes. Looking at filamentous algae in a pond you can see it moving up and down. The legs of this protozoan are modified cilia, called cirri. It feeds by drawing a current of water under the cell body into the cytostome - we would say mouth This is a Daphnia. Most people call them water fleas It is a tiny planktonic crustaceans, with a size varying from 0.2 to 4 mm. Daphnia have a special swimming style, they jump like a flea. Daphnia can live in acidic ponds, or in alkaline lakes, ponds, and rivers. Hydras have a radial symmetry and are tiny predatory animals. Found in most healthy ponds, lakes and rivers, when it is not too cold. Hydras move their 'arms' through the water trying to catch food. Their size varies from below one millimeter up to 3 mm

Lets have a Quiz about life in the water: What do you think? What can you find in a drop of sea water? Salt and plankton What do you think? What is E.coli? Read more about the Escherichia coli bacterium found in water, the human body, and ... What do you think? Why do we test water for e coli? Every blue dot you can see here is an e-coli bacterium growing in this Petri dish Some types of e coli can cause serious food poisoning in humans, can kill humans. E.coli gets in the water by fecal contamination, from humans or mammals or birds. What do you think? Why should we be careful with cryptosporidium oocysts It is a microscopic pathogen and a leading cause of diarrhea and malnutrition and the most common source of infection in immune-weakened people. What do you think? In some rivers and ponds is an extraordinary growth of algae - Why? The word Eutrophication is describing the overfertilization of lakes, rivers, ponds. Negative environmental effects are anoxia, what means loss of oxygen. Fish and other waterlife will die. The reason is mostly untreated sewage effluent, agricultural run-off with fertilizers.

Why do we need to protect Nature? You can find many of ponds with dirty water, old gasoline containers, plastic bags, and trash. Often you get a bad smell from far away! Do you like our pond? Wouldn't it be nice to have more healthy lakes where we can swim, fish, paddle? On the banks we can relax, play, watch the birds, discover aquatic plants, enjoy nature and have a good time with family and friends.. That's why it is important to protect Nature! Nature Conservation protects plants, animals and humans!! Work with us! Protect our precious water!

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