The immeasurable diversity of nature on our planet: scientists consider to 3500 species of mammals and more than 850 000 species of insects. Despite the fact that already for many centuries is explored flora and fauna, and annually published reports of discoveries of new species, which find even in long inhabited and explored areas. So, in the early 30-ies of our century was known to 800 thousand species of butterflies, and by 1942 he already 900 thousand species. Even less studied is the life in the oceans, which often make sensational discoveries.
The existence in the seas and oceans are dangerous animals the people knew even in ancient times, although along with very real views were widespread tales of fantastic sea monsters. It was known about the danger of injections of some animals, on the toxicity of some marine animals by eating them for food and, of course, about large aggressive fish – the shark. Currently published a lot of papers devoted to the description of poisoning from the ingestion of marine animals in different parts of the World ocean. So, only in 50-ies of our century from such poisoning suffered tysjacheletij. According to the researchers, only poisonous fish there are about 500 species, most of which live in the salty waters.
By climatic and geographical basis distinguish polar, Northern, temperate, subtropical and tropical zones. The majority of our population lives in Northern and moderate climatic zones and therefore are not familiar with the fauna and flora of the tropics. Year-round abundance of warmth in them contributes to the rapid development of wildlife. So, in the Amazon region, has about 15 thousand different species of animals. Continue reading
You have built a pond, planted it with plants and settled there living inhabitants. All summer did observe a small world, with interest to discover something new… autumn has Come. Now we need to think about how to save water world in winter. Well, if the weather isn’t frosty, but if not? All you need to provide.
Prepare ponds for winter starts in the fall, in October. First of all, you need to thoroughly clean the ponds from organic debris (tree leaves, remains of plants, fish excrement, etc.). In winter because of low temperatures reduce the activity of bacteria that decompose these residues. The result is the siltation of the bottom, reduces the oxygen content in the water and increases the content of nitrites and ammonia. Naturally, such changes can adversely affect the inhabitants of the lake, if not to destroy them. After cleaning of organic residues, it is necessary to trim the leaves and shoots to the very root. This applies primarily to plants – oxygenators. These include the water Crowfoot, hornwort, bolotnitsa, twrch, canadian Urrutia, lagarosiphon, tilea, rest and others. The leaves of these plants die off for the winter and if they advance not removed, they will rot and pollute the water. Not only cut the cane, through the hollow stems in winter will be given carbon dioxide to enter and oxygen to simulsays and plants.
Many aquatic plants “invented” a way to survive the winter cold. In autumn they formed buds that sink to the bottom and “sleep” there in the spring. If the pond is artificial, it is desirable to cut the plants these buds and transfer them to winter indoors. This stored the buds in the spring will sprout and turn into new plants. And do it faster than if left to overwinter in the pond. Continue reading
It’s cold and frosty, and, of course, the owners of HOMESTEAD ponds are concerned, is properly prepared their ponds for the winter. However, if certain recommendations of your fish and other pond inhabitants can easily move even the most severe winter.
If the pond is large enough and its depth is more than 1.5 meters, then all its citizens can be safely left in place, through some measures to ensure their safety. Before freezing the water in the pond is saturated with oxygen, and the fish it would be enough for a long time. But the dead leaves of aquatic plants and the waste products of the fish will decompose in cold water and allocate detrimental to the inhabitants of the marsh gas pond.
For saturation of water with oxygen and removal of marsh gas must be cut in the ice hole and to ensure that they did not freeze. In no event it is impossible to break the ice with a hammer or other object. From the strong sound waves can hurt the fish.
To make the hole carefully and all the rules, you can use a simple way, taking a small metal container and adding hot water to gradually melt the ice. You can use the screws – a special device for ice fishing. Keep in mind that the thickness of the ice in the cold if your pond does not covered and will be 40-60 cm
During the winter as little as possible disturb the fish. At low temperatures water pond inhabitants fall into sostoianiia rest (hibernation) and are located at the bottom of the pond. The fish stops feeding and consumes less oxygen. Continue reading