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Number Plants Rely: The wind is one of the principal agents concerned. A large number plants rely of plants rely entirely upon the small size of the seed and its light weight for distribution. Among these are orchids, poppies, and gentians which produce capsules opening in various ways to expose the minute seeds within them to the wind. Other seeds or fruits have developed special structures to facilitate dispersal by wind. Winged seeds are characteristic of lily, tulip, and pine, for example, and maple and elm are among those plants with winged fruits. Many grasses also have wings on specialized coverings of the seeds.
It is advisable for a prospective aquarium owner to visit a shop or a museum where aquariums are maintained professionally to observe how the various sizes of tanks are established, especially the number plants rely of animals compared to number plants rely of plants, the position and spacing of the plants in the tank, and the use of thermometers, thermostats, and aerators in case these are to be used.
The animal life in turn supplies the plants with carbon dioxide and the necessary nitrogen compounds. This cycle goes on indefinitely when all conditions are correct; it is then that the aquarium becomes a "balanced" habitat. Thus, perfect aquarium conditions have been obtained: (i) pure, well-aerated water; (2) constant temperature; (3) correct number plants rely of plants in relation to animals; and (4) right amount and kind of food.
The aquarium cannot remain balanced if there are too many plants, or too many fish, or both. And if the light is insufficient, both plants and animals suffer for want of the proper amount of oxygen. The same is true if the temperature is not properly regulated. Restraint must be used in the number plants rely both of plants and of animals placed in the tank. |
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