#diatoms are #unicellular #organisms which are often the base of #ocean #foodchains. #phytoplankton populations (which include diatoms) rise and fall in cycles, but overall phytoplankton populations in the oceans have dropped about 40% due to rising #sea surface temperatures. 
This is problematic since #plankton are generally the keystone species. If the phytoplankton dies, so do the small #aquatic #animals which eat the phytoplankton. If the small aquatic animals die, so do the small #fish who prey on them, and so on. In this way, the rising sea temperatures pose a real threat to most #aquaticlife.

Dive into our article about food chains: https://www.britannica.com/science/food-chain

Image credit: The Illustrators of Encyclopedia Britannica. Encyclopedia Britannica, INC.

#oceanlife #marinebiology #blueplanet #sealife #lifecycle
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