Answer to Question #3936 in Biology for Lounice Brown

Question #3936
Which biome covers most of the earth's surface? Discuss the enormous impact that this biome has on the biosphere as a whole
Expert's answer
A biome is an area on the earth's surface that has a certain set of characteristics. There are seven kinds of biomes in the world: tundra, taiga, temperate forest, tropical rainforest, desert, grassland, and ocean. The Marine Biome is the largest Biome on Earth. Over 70 percent of the earth's surface is covered by water. The ocean has a significant effect on the biosphere. Oceanic evaporation, as a phase of the water cycle, is the source of most rainfall, and ocean temperatures determine climate and wind patterns that affect life on land. Life within the ocean evolved 3 billion years prior to life on land. Both the depth and distance from shore strongly influence the amount and kinds of plants and animals that live there. Ocean currents greatly affect the Earth's climate by transferring heat from the tropics to the polar regions, and transferring warm or cold air and precipitation to coastal regions, where winds may carry them inland. Surface heat and freshwater fluxes create global density gradients that drive the thermohaline circulation part of large-scale ocean circulation. It plays an important role in supplying heat to the polar regions, and thus in sea ice regulation. Changes in the thermohaline circulation are thought to have significant impacts on the Earth's radiation budget.Insofar as the thermohaline circulation governs the rate at which deep waters reachthe surface, it may also significantly influence atmospheric carbon dioxide concentrations.

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