DownloadfreeTheGameOfLifeDiversityActivityPlay Gravitee Wars Game Free Airplane Games Online. Air War 2 Airplane War Games. The enemy has sent their best fighter pilots into our air space. You have to fight them back. The goal of each stage is to take out every single enemy. To do this, you will have to shoot down the enemies while flying around and avoiding their attacks. To control your fighter plane, use the Find out More. Fatal Flight. Fly your airplane in this fast race game. Collect as many yellow stars and avoid enemy planes along the way. Find out More. Flight 3. D Aerobatics. Take the stick and fly through the rings in Flight 3. D Aerobatics. Try different challenges and keep your eye on the fuel. Have fun playing realistic controls. Find out More. Skies Of War 2. Skies of War 2 is about fighting against Enemy in Air and on the Ground. If you played the first edition than you already know everything there is to know. When you collect enough money you can buy a new Aircraft. 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Terrestrial biodiversity tends to be greater near the equator,2 which seems to be the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth, and is richest in the tropics. These tropical forest ecosystems cover less than 1. Marine biodiversity tends to be highest along coasts in the Western Pacific, where sea surface temperature is highest and in the mid latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots,6 and has been increasing through time,78 but will be likely to slow in the future. Rapid environmental changes typically cause mass extinctions. More than 9. 9. 9 percent of all species that ever lived on Earth, amounting to over five billion species,1. Estimates on the number of Earths current species range from 1. More recently, in May 2. Earth currently with only one thousandth of one percent described. The total amount of related DNAbase pairs on Earth is estimated at 5. In comparison, the total mass of the biosphere has been estimated to be as much as 4 Tt. C trillion tons of carbon. In July 2. 01. 6, scientists reported identifying a set of 3. Last Universal Common Ancestor LUCA of all organisms living on Earth. The age of the Earth is about 4. The earliest undisputed evidence of life on Earth dates at least from 3. Eoarchean Era after a geological crust started to solidify following the earlier molten Hadean Eon. There are microbial matfossils found in 3. Western Australia. Other early physical evidence of a biogenic substance is graphite in 3. Western Greenland. More recently, in 2. Western Australia. According to one of the researchers, If life arose relatively quickly on Earth. Since life began on Earth, five major mass extinctions and several minor events have led to large and sudden drops in biodiversity. The Phanerozoic eon the last 5. Cambrian explosiona period during which the majority of multicellularphyla first appeared. The next 4. 00 million years included repeated, massive biodiversity losses classified as mass extinction events. In the Carboniferous, rainforest collapse led to a great loss of plant and animal life. The PermianTriassic extinction event, 2. The most recent, the CretaceousPaleogene extinction event, occurred 6. The period since the emergence of humans has displayed an ongoing biodiversity reduction and an accompanying loss of genetic diversity. Named the Holocene extinction, the reduction is caused primarily by human impacts, particularly habitat destruction. Conversely, biodiversity positively impacts human health in a number of ways, although a few negative effects are studied. The United Nations designated 2. United Nations Decade on Biodiversity. EtymologyeditThe term biological diversity was used first by wildlife scientist and conservationist Raymond F. Dasmann in the year 1. A Different Kind of Country4. The term was widely adopted only after more than a decade, when in the 1. Thomas Lovejoy, in the foreword to the book Conservation Biology,4. Until then the term natural diversity was common, introduced by The Science Division of The Nature Conservancy in an important 1. The Preservation of Natural Diversity. By the early 1. TNCs Science program and its head, Robert E. Jenkins,4. 3 Lovejoy and other leading conservation scientists at the time in America advocated the use of the term biological diversity. The terms contracted form biodiversity may have been coined by W. G. Rosen in 1. 98. National Forum on Biological Diversity organized by the National Research Council NRC. It first appeared in a publication in 1. E. O. Wilson used it as the title of the proceedings4. Since this period the term has achieved widespread use among biologists, environmentalists, political leaders and concerned citizens. A similar term in the United States is natural heritage. It pre dates the others and is more accepted by the wider audience interested in conservation. Broader than biodiversity, it includes geology and landforms. Definitionsedit. A sampling of fungi collected during summer 2. Northern Saskatchewan mixed woods, near La. Ronge is an example regarding the species diversity of fungi. In this photo, there are also leaf lichens and mosses. Biodiversity is most commonly used to replace the more clearly defined and long established terms, species diversity and species richness. Biologists most often define biodiversity as the totality of genes, species and ecosystems of a region. An advantage of this definition is that it seems to describe most circumstances and presents a unified view of the traditional types of biological variety previously identified taxonomic diversity usually measured at the species diversity levelecological diversity often viewed from the perspective of ecosystem diversitymorphological diversity which stems from genetic diversity and molecular diversity4. This multilevel construct is consistent with Datman and Lovejoy. An explicit definition consistent with this interpretation was first given in a paper by Bruce A. Wilcox commissioned by the International Union for the Conservation of Nature and Natural Resources IUCN for the 1. World National Parks Conference. Wilcoxs definition was Biological diversity is the variety of life forms. The 1. 99. 2 United Nations. Earth Summit defined biological diversity as the variability among living organisms from all sources, including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part this includes diversity within species, between species and of ecosystems. This definition is used in the United Nations Convention on Biological Diversity. One textbooks definition is variation of life at all levels of biological organization. Biodiversity can be defined genetically as the diversity of alleles, genes and organisms. They study processes such as mutation and gene transfer that drive evolution. Measuring diversity at one level in a group of organisms may not precisely correspond to diversity at other levels. However, tetrapod terrestrial vertebrates taxonomic and ecological diversity shows a very close correlation. DistributioneditBiodiversity is not evenly distributed, rather it varies greatly across the globe as well as within regions. Among other factors, the diversity of all living things biota depends on temperature, precipitation, altitude, soils, geography and the presence of other species. The study of the spatial distribution of organisms, species and ecosystems, is the science of biogeography. Diversity consistently measures higher in the tropics and in other localized regions such as the Cape Floristic Region and lower in polar regions generally. Rain forests that have had wet climates for a long time, such as Yasun National Park in Ecuador, have particularly high biodiversity. Terrestrial biodiversity is thought to be up to 2. A recently discovered method put the total number of species on Earth at 8. However, this estimate seems to under represent the diversity of microorganisms.