With the usual apologies for the recent radio silence, but full time jobs and family life do cheerfully get in the way of naturalizing. However, this sunny morning we made it to the beach. Low tide, just off spring tides and a lot of normally invisible kelp beds were exposed:
Laminaria hypoborea. The holdfast (the bit that grips the rock substrate) is smaller in L. hypoborea than L. digitata yet a lot more L. digitata is torn from the seabed and thrown onto the beach; the stipe (stalk) is much longer and thicker in L. digitata (comparison photo to come) and the fronds smaller. The section of the Bay where L. hypoborea thrives is one of the most energetic bits of the Bay; it's where the biggest waves come ashore yet these seaweeds with comparatively puny stipes and holdfasts and with big fronds survive very well. A proper scientist needs to look at the hydrodynamics of this.