World of translation : Nature
, 14:02

flora and fauna

floraDo you know that on our planet specialists comprise about 150 million species of animals and plants, of which has already been studied all-nothing - 1.5 million. And many of the rest species have not the opportunity to be studied, because, sadly, every day extinct an average about 100 species of flora and fauna.
Red algae, RhodophyceaeAs is known, algae and higher plants exist longer than others different plant species on the planet. The oldest is the so-called whelk. It is believed that the detected fossil, which is belonging to the Bang genus, is about 1.2 billion years. fernAmong the higher plants the most ancient are ferns and horsetails, which grow a 350 million years ago. It is interesting that then their sizes were huge, equisetumand over time the biomass of these species of flora turned into coal, an extremely significant for us now fossil.
 In our time California juniper tree previously considered the oldest of all living on Earth trees, California juniper treeit branches reach a height of 30 meters, it crown is 20 meters in girth, and it's already living about six thousand years. But it turned, that discovered in Sweden in 2008 ate has already eight thousand years.
On the other hand, in the rating of trees which are living in our area less than other, wins birchBirch (about 100 years), followed by Acer platanoides (Norway maple), wich is living about 150 years.
Age of the tree is determined by growth rings, which can be seen on the freshly felled trunk. Two rings, one light, the other dark, correspond to one year of life of the tree. rings on a tree trunkIf we talk about the growth rate of trees, it is quite impressive: each year the trees of our forests go up to about 40 cm and it is going up to 50 years of life, after which growth slows down, the crown and trunk of the tree grow in breadth.
The roots of the plants which are living in deserts, penetrate deep into the 20 meters. plant roots"Second place" in this aspect take the roots of grapevine that can reach a depth of 16 meters. In our forest trees "launch" their roots only for 5-10 meters in depth.
In spring, when the leaves are formed and grow, the average tree needs about 500 liters of water daily. Through the root system of the water rises through the vessels of plants to each leaf. It's interesting, that at night and during winter the water and dissolved nutrients move in the opposite direction, from the branches to the roots.
Scientists have discovered an interesting fact. It turns out that when the tree starts to dry, it "screams" in the range of 50-500 kHz. Naturally, man can not hear such a "plea for water", but it is a signal to bark beetles, which "finishes" a dying tree.
plants predatorsSome plants, which are called predators are able to "eat" other organisms. Most of the victims are small insects. Thus, plants predators fill a lack of minerals, because they live in poor soils. It is known about 450 species of carnivorous plants, their largest concentration is located on the south-west of Australia. Most plants predators catch their victim, using the sticky substances and other contrivances, and then digest the prey with the help of enzymes.

Author: World of translation
5 (votes: 0)

Interesting by thematics:

  • 04.09.2012  12:07 Aloe
More news


  • avatar
    Boyzz - 7.02.2013, 23:24
    Thanks for your publication. I also beviele that laptop computers are becoming more and more popular lately, and now are often the only sort of computer included in a household. This is due to the fact that at the same time that they're becoming more and more inexpensive, their processing power is growing to the point where they're as effective as personal computers out of just a few years back. /wp-login.php?action=registerI have seen a great deal of useful elements on your site about personal computers. However, I've the impression that laptop computers are still more or less not powerful more than enough to be a sensible choice if you typically do projects that require plenty of power, for example video croping and editing. But for web surfing, microsoft word processing, and majority of other typical computer work they are all right, provided you don't mind small screen size. Appreciate sharing your thinking./wp-login.php?action=registerI have mastered some new elements from your web page about pc's. Another thing I've always imagined is that computer systems have become an item that each household must have for many people reasons. They offer convenient ways to organize homes, pay bills, search for information, study, pay attention to music and perhaps watch tv shows. An innovative technique to complete many of these tasks is by using a notebook computer. These computers are mobile ones, small, powerful and mobile./wp-login.php?action=registerThanks for helping me to attain new strategies about personal computers. I also have belief that certain of the best ways to maintain your laptop computer in primary condition is by using a hard plastic-type material case, as well as shell, that will fit over the top of one's computer. These types of protective gear are usually model distinct since they are manufactured to fit perfectly over the natural casing. You can buy all of them directly from the seller, or via third party sources if they are available for your notebook computer, however its not all laptop will have a cover on the market. Again, thanks for your recommendations./wp-login.php?action=registerThanks for giving your ideas listed here. The other thing is that whenever a problem arises with a laptop motherboard, people today should not take the risk involving repairing that themselves because if it is not done right it can lead to irreparable damage to an entire laptop. Most commonly it is safe just to approach your dealer of the laptop for any repair of its motherboard. They've got technicians who definitely have an competence in dealing with notebook computer motherboard challenges and can carry out the right diagnosis and execute repairs.