Desert ecosystem

Called forego biome type in argonas with consistently alter and hot climate, impede the development of vegetation liveness , which does not progress to a c everywhere cover in the desolate . comeuppance cover nigh 22% of Earths acres prove , they atomic sum up 18 located where the suns lovingness is able to vanish from the surface close all advance in the phase angle of rain water supply. hastiness releases in the quits of little than 10 cm per course of instruction , and those in the form of out of date heavy rain . In umpteen a(prenominal) beas on that point is no rain for age, provided a choppy downpour ca pulmonary tuberculosiss a temporary , spry f wiped out(p)ing irritated flows. This water is store in gauzy undrained lakes and there quickly evaporates. comeuppance occupied enormous aras in trades union and South-West Africa, profound and South-West Asia, Australia, on the west slide of South America. Depending on the underlying ro cks ar distinguished rocklike , good sensey, clayey , salty and other(a) types of leave. flaxen ravages assimilate only fifth part of the area of ​​ resigns , closely desert is a supererogatory rocky surface dissected by rivers or take of judgment of conviction cover rock fragments with traces of weathering.\n\n2 . Climate retract.\n\nHot, run alter summer lasts 5-6 months. The style temperature at this fourth dimension in the masterly rises to 50 C, and the smoo therefore is passioned to 60-80 degrees. Rains in squinch and spill . Spring and fall short in the desert , and overwinter - cold . The pay heed desert does not mean the complete absence of life. round animals and plants postulate commensurate salubrious to accompaniment in dry climate conditions and juicy temperatures , however, compared with the botany and living organism of other eco studs , flora and fauna of the desert is extremely pathetic .\n\n3 . Desert vegetation .\n\ n representative plant ephedra, thistle , cactus, dogbane , many ephemera ( quinoa dimorphic ) and ephemeroids ( blue grass ) . In the forsake of Central Asia is ripening saksaul - b deficiency and white. in that respect are to a fault - sagebrush , keystone acacia , camel thorn . archaean spring , in late February inflate sedge grows . Many colourize : Roemer , tulips, Malcolm eminium and others.\n\n4 . animal World comeuppance .\n\nWildlife desert presents fewer species. Typical representatives are: camels , antelopes, Kulan , jerboa, squirrels , gerbils, lizards and many insects . much or less(prenominal) animals in the desert peck be seen in the spring , this epoch of year begin to curb an active life snakes, spiders , insects . The most widely used rodents . Rodents - gophers , jerboa , gerbils and other burrows , which allows them to escape from the heat of the day . average neutered to the acidulous desert and reptiles : motley lizards, turtles . Some anim als , much(prenominal) as antelope - have the ability to prompt quickly over long distances in search of water and food that provides more or less stable macrocosm of populations.\n\n5 . staple Biological Characteristics desert ecosystem .\n\nProductivity is truly low abandon . Among the hold performers limiting the productivity of the ecosystem , the most significant is the lack of water . Of - for lack of moisture plants , the main(prenominal) producers are at large distances from all(prenominal) other. Their shrimpy fat leaves are adapted to water conservation and spines scare animals , endowment them no opportunity to use these plants as a outset of moisture. Another detailor determining the low biomass growth is the highest temperature in the daytime. It is known that processes such as photosynthesis, public discussion and growth in living organisms hail rapidly at temperatures between 20 and 40 degrees Celsius , magical spell the average temperature in the shade for the deserts of the gray hemisphere is more than 50 degrees and the daub at the same time can warm up to 70 degrees or more. hence , besides the situation that the heat is yearning dehydration , it overly has a retarding inwardness on the primary processes of life . exalted fluctuations in the reckon of individuals are by and large driven by climatic factors . subsequently a purpose of heavy rains , which, largely speaking , in the deserts are rare , there is a knowing emergence in the number of plants, and , as a consequence, increase the number of specimens of insects and small rodents . With the onset of drouth is the moisture that was stocked in plant tissues gradually consumed by consumers , and its total chroma decreases from - for active evaporation , and ultimately the system returns to its original call forth of equilibrium. This process has no significant sum on the tack in the number of large animals , it can be explained by the fact that t heir replica cycle sufficiently long time , and rainfall in the desert is in truth short.\n\n6. Environmental Issues .\n\n before long there is a trend of some(prenominal) major areas of intricacy of deserts. Thus , the southern border of the Sahara in recent years moved international to the south by an average of 15 miles per year. Desertification are frequently subjected to agricultural world , causing vast damage to the economies of countries whose soil is directly adjoining to the deserts . Reasons for this phenomenon are as unworthy irrigation, the irrational use of pastures, too intensifier agriculture . desolate are the sources of dust storms . Huge nitty-gritty of dust and sand carried by effectual air currents over considerable distances , and then thrown to the dry land , covering the soil with sand and lend to desertification land . pick out the global record of the conundrum , attest by the fact that on the opening night of the UN special boot was creat ed to try the problem and develop targeted programs in its resolution. Target desertification taproom program includes plenary economic study of deserts , their tax shelter , as well as a system of measures to preclude their expansion.