They live fast and die young: bryozoans Ive learned an article which was written by Diane T. Edwards. It was quite an interesting one. The title sounded as Home on the grain; minuscule and precious, newly found species of aquatic invertebrates offer a delightful solution to a deep sea mystery bryozoans. So, the matter concerns bryozoans. The author gives us description of bryozoans kind of living, the way of migration etc. The article is not large, but contains a lot of interesting and useful information.
The language of is not too scientific, thus the article could be widely available. There are more than 5,000 described species of bryozoans today. By the way, between the years 1983 and 1985 nine new species were discovered. The taxonomic names of the newly discovered species were also not long ago described. Little bit earlier another 24 species were described all of them are capable of establishing large colonies on single grains of sea sand. It is said, that bryozoans exhibit an accelerated reproductive cycle.
The sizes of different species are also different, for example, some of them could reach only from about 0.1 to 0.3 mm in length (talking about Cribrilaria parva).
The word parva means small. To learn such species the scientists use scanning with a n electron microscope. Another species are interesting in its own way. For example, a colony of Membranipora triangularis is able to jump from grain to grain via tubular connections. One can also find a photo of that reading the article. There is a very interesting fact, that the species Cribrilaria innominata are able to encrust not only the pieces of seashell, but also sand-sized grains! As a rule most of the species cluster in colonies like lichens.
The Essay on Alan Greenspan Interest Article One
The article, 'Greenspan gets another Fed term,' in the New York Times discussed Alan Greenspan's success and failures during his term. The article was fairly easy reading. I found some statements to be quite amusing however, there were some issues discussed that was a little ambiguous. Reading this article, I learned that President Clinton nominated Alan Greenspan to a fourth term as chairman of ...
Such colonies may comprise hundreds or even some thousands of individuals. Bryozoans are also notable for their adaptability. These small aquatic invertebrates can live both on a seashell and on a rusty can, which means that the material (of natural origin or not) does not matter really for them. Normally they encrust boats, old rusty cans, beached log, rocks in the bottom of the bay and shells. Inclination to making colonies is one of the most notable features of bryozoans. An asexual reproduction is another characteristic feature. What are they look like? They are like small calcified boxes and each box has a little orifice where one can see the organism sticks its tentacles through. Talking about the lifetime of bryozoans it is worth mentioning that most of them live many years, but the new species frequently die within only one year.
So, they live fast and die young, as it is said in the article. And when they die, they leave nothing but their skeletons, which are affixed to single grains of the seas shifting sand or some another object. Perhaps the aquatic invertebrates we are talking about is not a long-distance swimmer, but however, just imaging how does is move itself being affixed on the shifting sand one can easily understand, that its widespread existence is phenomenal. Because of such making home on the grain these organisms become motile. Its a natural feature again the organism finds a protection in such armour as he has, but at the same time it looses its mobility. Thus their life cycle is very strange but unique. One may ask in which water these aquatic invertebrates prefer to live.
So, they could be found both in fresh and salt water areas throughout the whole world. Generally, most of them live in salt water and only several tens of species can live in sweet (fresh) water. It is said that wherever you go, you should obviously find them. Summing up learning of this article, written by Diane D. Edwards, Id like to observe the main features of it. The language is not too smart and very scientific, but popular scientific and I think thats good, because many people can understand that and get acquainted with the subject. This organism, which is connected genetically with worms, is described very interesting and briefly here.
The Essay on Water Pollution 16
Water Pollution People keep on throwing trash and industrial wastes into our clean water. If this continues, the quality of our water will deteriorate, and without it everything dies, including us. Water pollution is destroying our world, but fortunately we can count on special treatments for this kind of problem. What is water pollution? "It is the contamination of water by foreign matter such as ...
Bibliography:
Edwards Diane D.
Home on the Grain; minuscule and precocious, newly found species of aquatic invertebrates offer a delightful solution to a deep sea mystery bryozoans. (http://www.findarticles.com/p/articles/mi_m1200/i s_v131/ai_4722688)..
