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  2. Hypoxia (environmental) - Wikipedia

    en.wikipedia.org/wiki/Hypoxia_(environmental)

    The exaerobic zone is found at the boundary of anoxic and hypoxic zones. Hypoxia can occur throughout the water column and also at high altitudes as well as near sediments on the bottom. It usually extends throughout 20–50% of the water column, but depends on the water depth and location of pycnoclines (rapid changes in water density with depth).

  3. Dead zone (ecology) - Wikipedia

    en.wikipedia.org/wiki/Dead_zone_(ecology)

    Permanent dead zones are deep water occurrences that rarely exceed 2 milligrams per liter. Temporary dead zones are short lived dead zones lasting hours or days. Seasonal dead zones are annually occurring, typically in warm months of summer and autumn. Diel cycling hypoxia is a specific seasonal dead zone that only becomes hypoxic during the night

  4. Ocean deoxygenation - Wikipedia

    en.wikipedia.org/wiki/Ocean_deoxygenation

    Red circles show the location and size of many dead zones (in 2008). Black dots show dead zones of unknown size. The size and number of marine dead zones—areas where the deep water is so low in dissolved oxygen that sea creatures cannot survive (except for some specialized bacteria)—have grown in the past half-century. [19]

  5. Redox gradient - Wikipedia

    en.wikipedia.org/wiki/Redox_gradient

    Redox gradients form in water columns and their sediments. Varying levels of oxygen (oxic, suboxic, hypoxic) within the water column alter redox chemistry and which redox reactions can occur. [10] Development of oxygen minimum zones also contributes to formation of redox gradients.

  6. Oxygen minimum zone - Wikipedia

    en.wikipedia.org/wiki/Oxygen_minimum_zone

    Many species actively avoid low oxygen zones, [32] [33] [34] while others take advantage of their predators’ low tolerance for hypoxia and use these areas as a refuge. [ 32 ] [ 33 ] [ 34 ] Zooplankton that exhibit daily vertical migrations to avoid predation and low oxygen conditions also excrete ammonium near the oxycline and contribute to ...

  7. Tom Brady’s 3 Kids Look All Grown Up as They Ring in ... - AOL

    www.aol.com/lifestyle/tom-brady-3-kids-look...

    Related: Tom Brady Celebrates His 'Forever Baby Girl' Vivian on Her 12th Birthday: 'You Light Up My Life' In the first photo from the carousel, Brady's children looked all grown up as he posed ...

  8. Baltic Sea hypoxia - Wikipedia

    en.wikipedia.org/wiki/Baltic_Sea_hypoxia

    Baltic Sea hypoxia refers to low levels of oxygen in bottom waters, also known as hypoxia, occurring regularly in the Baltic Sea. As of 2009 [update] the total area of bottom covered with hypoxic waters with oxygen concentrations less than 2 mg/L in the Baltic Sea has averaged 49,000 km 2 over the last 40 years.

  9. A standoff between BlackRock and the FDIC is dragging into ...

    www.aol.com/finance/standoff-between-blackrock...

    The "passivity" agreement FDIC wants BlackRock to sign is designed to assure bank regulators that the giant money manager will remain a "passive" owner of an FDIC-supervised bank and won’t exert ...