Marine snow | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-27

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Marine_snow


00:01:14 1 Composition
00:04:06 2 Aggregate dynamics
00:04:51 2.1 Ballasting effect
00:05:41 2.2 Fragmentation
00:07:18 3 Particle associated microorganisms
00:10:11 3.1 Carbon cycling
00:11:22 3.1.1 Microenvironments
00:12:01 4 Implications
00:14:13 5 See also



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SUMMARY
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In the deep ocean, marine snow is a continuous shower of mostly organic detritus falling from the upper layers of the water column. It is a significant means of exporting energy from the light-rich photic zone to the aphotic zone below which is referred to as the biological pump.  Export production is the amount of organic matter produced in the ocean by primary production that is not recycled (remineralised) before it sinks into the aphotic zone.  Because of the role of export production in the ocean's biological pump, it is typically measured in units of carbon (e.g. mg C m−2 d−1).The term was first coined by the explorer William Beebe as he observed it from his bathysphere.  As the origin of marine snow lies in activities within the productive photic zone, the prevalence of marine snow changes with seasonal fluctuations in photosynthetic activity and ocean currents. Marine snow can be an important food source for organisms living in the aphotic zone, particularly for organisms which live very deep in the water column.