Seaweed needing ID please

[JennyS]

I've a few seaweed photos from this year and would really appreciate ID help and pointers if possible with them.
I walk past and over it but have to admit that I've never really tried to identify any before now - its time to start looking closer!
All are from the SW coast of Ireland and the numbers are to the left of the relevant photo.

Q1. Q2. Q3.


Q4. Q5. Q6.


Q7. Q8. Q9.


Q10.

Thanks in advance,
Jenny

[zan]

Hiya,

Ok, I don't know them all, but the ones I do know are:

Q2 & 4: Fucus vesiculosus (bladder wrack). Both the same species, but one is dried out and probably dead (the black one). It can be ID'd by the paired bladders down the step which will pop if you squeeze them.

Q5 & 8: Ascophyllum nodosum. Again, the same species but one is dead - not sure what the stuff growing on it in Q5 is though. Incidentally, the weed with serrated esges underneath it in Q5 is Fucus serratus (serrated wrack), a lower shore species.

Q6: Pelvetia canaliculata (channel wrack). This is an upper shore species and teh channels in the fronds help it withstand desiccation when the tide is out.

Q7: A kelp, probably Laminaria sp. Not sure which species it is as you need to see the fronds more clearly, but it's a subtidal species which has been washed up.

I don't know the others but hopefully someone will be along soon to help out

Zan

[tom00_uk]

Hard to say for some as they are dying off but

1 Gigartina Stellata
2 Fucus vesiculosus – Bladder Wrack
3 Plumaria elegans- though hard to say
4 Fucus vesiculosus – Bladder Wrack
5 Ascophyllum nodosum – knotted wrack
6 Pelvetia canaliculata – channelled wrack
7 kelp, not possible to say what of the three common fine fronds it is as its all bunched up
8 Ascophyllum nodosum – knotted wrack
9 hard to say as its rotting but Chondrus crispus – Irish moss
10 Plocamium cartilagineum – not sure though

[JennyS]

Thank you both for the IDs and the additional info.
What should I be looking at / for to be able to identify the Kelp to species, and is this crop below (from Q5) the Serrated Wrack?



Thanks again,
Jenny

[tom00_uk]

for kelp the holdfast helps as well as the shape of the stripe (stem) and the fronds

it looks like toothed wrack to me (Fucus serratus)

and the green one is sea lettuce - Ulva lactuca