I think we approached the evening of Saturday 27th May with some concern, the hot weather earlier in the week had turned to heavy thunder storms, and our walk accross to the scar at Sandylands looked rather questionable! In the event the weather abated, and the rain only appeared on our walk back, allowing us to enjoy a rather interesting and historic marine landscape.
Scars (or skears) are a common geological formation in the Bay, periodically adding a bit of texture in the form of glacial boulder-clay deposites to flat mud and sands. Off Sandylands this feature has clearly been of historic importance, given the number of posts indicating fish traps. Apparently these had been in use until the early 1960’s, and while they looked like conventional fish traps, (a ‘V’ shape narrowing to trap the fish in its point as the tide goes out), anecdotally they may have been associated more with mussel farming. Indeed the reef is in part covered by a large mound of mussel shells. Interspersed in the mussel shells were oyster shells – our local species of oyster was wiped out by disease a hundred years ago, and these worn shells my have been relicts of the time when they were still plentiful.
Many of the boulders in the scar were completely covered in barnacles, or the swirling patterns of the honeycombe worm reefs. Other animals of interest included anemones, sandhoppers, a grey nudibranch, and tiny common and hermit crabs, that have recently settled to the bottom from their planktonic larval stages.
All in all, an excellent and educational experience. Many thanks to Gordon for organising this, and making an appearance despite having raced in the thunderstorms earlier in the day!
A big thanks to everyone who turned out for the beach walk and survey at Roa on Thursday night. The weather did not look very promising in Lancaster, but it was very sunny (though a cold wind) at Roa.
We split into two groups: The main group took a look at the life in the rock pools below the Lifeboat station, always a good hunting area, and saw a wide range of life, including plumose anemones exposed by the extreme low water. The high spot included a small lobster, I think the first time we have seen one on a beach walk, though they are a fairly common sight when diving at this time of year.
I turned to the rather less glamorous task of running a transect down the beach, which proved to be quite hard to complete before the tide turned!
We were joined by Albert towards the end of the evening; he spotted the star find – a curled octopus swimming in the surface waters within a meter of the shore. – I have added the photo above due to popular demand! The octopus was bright red in the water, but quickly changed color to white on capture. He (or she) returned to the original red colouration on release, and continued surface swimming…
I was asked about the guide we were using – this was ‘Seashore Safaris’ by Judith Oakley, and is published by Graffeg.
Thanks to everybody who made the recent World Oceans day at Freeport Fleetwood such a success. Trawls in Fleetwood harbour resulted in us finding and identifying nearly 50 species, many of which were available for visitors to Freeport to see, and touch – before being returned safe and unharmed on the Saturday evening! Stars of the event included a European eel, a lobster, a greater pipefish and several species of flatfish.
More from this event on That’s Lancashire TV (via YouTube):
The Bay ‘Super-Estuary’: After the last ice age, the ice sheets that scoured out Morecambe Bay retreated, leading to the formation of the Irish Sea, and flooding the Bay itself. While it still reaches depths of 80m at Lune Deeps, most of the Bay has been filled in with sediment brought down by the rivers Wyre, Lune, Keer, Kent and Leven to form the largest network of intertidal mudflats in the UK.
Satellite imagery shows that the bay as a whole has a very high primary productivity. Fixing around 1.5kg of organic carbon per square meter every year, this ecosystem is one of the most productive in the world. Despite this powerhouse of growth, life in the Bay tends to keep itself hidden, so on Saturday 28th September, Gordon Fletcher led a ‘Heysham Safari’, to expose some of its less commonly spotted inhabitants.
The event, organised with Morecambe Bay Partnership, was a great success, with twenty five participants filling the restaurant at the Royal Hotel, Heysham, for Gordon’s talk! The talk was followed by a shore walk around Throbshaw Point, where we found and identified 26 species in a little over an hour.
Thanks to everyone for attending, and helping to make for such an enjoyable occasion!