Do Tuna and other forms of life effectively act as a sort of biological filter collecting mercury over time though? Like we would too if we ate too much Tuna getting mercury poisoning.
Could an order of magnitude less actually be a lot if you look at it that way? Since the permafrost would just be passively accumulating, as opposed to actively in a way which only something living can do.
> Do Tuna and other forms of life effectively act as a sort of biological filter collecting mercury over time though?
Yes. This is called biomagnification. Basically, animals absorb heavy metals that are in the food they eat, but don't have an efficient way of excreting it again. Mainly since these metals are bound so they're fat soluble, not water soluble. The higher up in the food chain, the worse it gets.
Could an order of magnitude less actually be a lot if you look at it that way? Since the permafrost would just be passively accumulating, as opposed to actively in a way which only something living can do.