Currents and Marine Life. Currents are powerful physical forces in the seas. They move water and heat around the globe, and help determine the chemical make-up of the water column. Currents also are a major factor in ocean ecosystems. Two types of current motion, upwelling and downwelling, strongly influence the distribution and abundance of marine life. Upwelling Currents play a huge role in marine productivity, through a process called upwelling. Sea life is concentrated in the sunlit waters near the surface, but most organic matter is far below, in deep waters and on the sea floor. When currents upwell, or flow up to the surface from beneath, they sweep vital nutrients back to where they're needed most.
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In early 2011 the company announced the Miracle-Ear Mirage, an invisible completely in the canal hearing aid that fits deep in the ear canal. Also in 2011, Miracle-Ear debuted a waterproof hearing aid, called the Aquavi, which is also dustproof and virtually shockproof to accommodate active lifestyles.It can be completely submerged in water up to three feet deep for up to 30 minutes without damage to the instrument, and has an IP rating of 68.n 1962, the Miracle-Ear IV was the first hearing aid that used integrated circuitry, and in 1971, the company introduced the Dahlberg SHARP circuit, an ultra-low circuit utilizing in-house hybrid production.