Movement of organisms out of a population

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Your new ahaEmigration

Emigration is movement out of a population or place. Source: Emigration ↗

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23Process returning nitrogen gas to the atmosphereRECALL
Denitrification
Performed by certain bacteria
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24Upwelling · explain the termRECALL
The rise of deep, nutrient-rich water toward the surface.
Upwelling can support productive fisheries by feeding phytoplankton near the surface.
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25Ocean acidification · explain the termRECALL
A decrease in seawater pH caused mainly by absorbed carbon dioxide.
It can make it harder for some organisms to build shells or skeletons from calcium carbonate.
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