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Each fall in North America, the salmon run sees huge numbers of fish return from the sea to spawn in freshwater. Making their way upstream, they follow the imprinted scent of their birthplace. Along the way are numerous obstacles – including grizzly bears. As the forest giants prepare to hibernate, they eat tons of salmon. The nitrogen-rich leftovers feed smaller mammals but also, amazingly, trees. We examine the fragile balance of this unique relationship.

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Video chapters:
00:00 Grizzlies catching salmon
00:36 The Salmon Journey
02:19 Salmon after spawning
02:29 Grizzlies catching/eating salmon
03:32 Scientists observed a female catching 143kg salmon/8h
03:45 During salmon run bears it only a 1/4 of each fish
04:03 Trees get 80% of their Nitrogen from fish
04:37 Trees grow thicker rings when more salmon arrive
05:35 Grizzly eating salmon
05:44 Check out our "Wild to Know" series!

🖇️ Sources:
"Trees Get the Table Scraps from a Fish Dinner" https://www.amnh.org/content/download...
"The Salmon Life Cycle": https://www.nps.gov/olym/learn/nature...
"Influence of spawning salmon on tree-ring width, isotopic nitrogen, and total nitrogen in old-growth Sitka spruce"
"Salmon: A Natural Climate Solution": https://www.nrdc.org/bio/giulia-cs-go...
"Community Ecology and Conservation of Bear-Salmon Ecosystems" https://www.frontiersin.org/articles/...
"Using bears to quantify the importance of salmon to wildlife" https://www.researchgate.net/publicat...
"Salmon Trees": https://hakaimagazine.com/features/sa...
"The biggest trees capture the most carbon: Large trees dominate carbon storage in forests": https://phys.org/news/2020-11-biggest...



#terramatters #salmon #grizzly