Although the book cover gives the title as Twenty Thousand Leagues Under the Sea, the title page titles the book Twenty Thousand Leagues Under the Seas; Or, The Marvelous and Exciting Adventures of Pierre Arronax, Conseil His Servant, and Ned Land a Canadian Harpooner.
A man-made pond made with a pond liner has no soil â so one source of micro-organisms is missing, especially if you keep cleaning the pond liner. Most ponds have few stones and few plants reducing the number of micro-organisms even further.he use of the word ânaturalâ here refers to the pond filtration system, not the esthetic look of the pond. Iâll deal with esthetics in a future post on how to build ponds. In a natural pond the water, soil, plants, and animals all live in harmony. No one comes along to clean the pond or to aerate it.
The euglena are normally found in the largest concentrations on water. When a pond, lake or still body of water has a green or sometimes red film over the top of it, it is highly likely that this film will be made up of euglena. Seeing these organisms in water can be a good indicator that the water is polluted. Learn more about Biology