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Dimitris Poursanidis

Researcher

Sep 15, 2026

5:30
Over time, this creates a mat of sorts that sits on the seabed.
5:36
So this mat has become thicker and thicker, and the thicker the mat it is, the more carbon stocks there are.
5:43
So you have the living biomass, the leaves, but then this go down to the root system and build mat.
5:50
And to understand how big this can be, we have a lot of cases in the west Mediterranean where the exposed mat because of a thunderstorm or other, uh, anthropogenic factor has broke, and you can go diving, and you have a five-meter wall And you see this millennia wall that has been built upon.
6:12
And this is the very important thing to preserve because it is the history of the habitat.
6:20
And by that, Posidonia is the queen again also for the carbon, uh, in terms of stocks, how much we have already there, and also the accumulation rate, how much carbon is added every year in the meadow per unit area.
6:37
However, not all seagrass are equal because we have other species in Europe and beyond that are ephemeral, appear and disappear because of the life cycle, because of the local conditions, or are there, but the contribution to the carbon stocks is not that significant, or it's very minor.

11 MINS LATER

17:56
So, oh, okay

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