For example, a pond ecosystem may consist of a pond habitat, inhabited by aquatic plants, microorganisms in the mud at the bottom, fish in the water and a heron on the bank. If one part of an ...

Eutrophication is also associated with major changes in aquatic community structure ... is often positively related to nutrient levels and ecosystem productivity. Piscivorous fishes (e.g ...

because one question that we had is 'Will there be any life at all?'" Sponges grow very slowly — sometimes less than two centimeters a year. To get this big, the scientists say, the ecosystem ...

Thus, nitrogen undergoes many different transformations in the ecosystem, changing from one ... process that is critical to the survival of all life on Earth. Nitrification is the process that ...