Low tides and high times part II

Low tides and high times part II

As we got to the lowest part of the beach, kelp appeared, long wide strands of the stuff lying limp and attached to the rocks - Photo Credit, Ana Cowie

Given the choice of a day on the beach looking under rocks at Filey or a slightly different day at a more secret Yorkshire gem, Telling our Story Volunteer Howard Roddie chose to put his wellies on and do both and create two blogs. In his second blog on this subject, Howard explores a secret beach and discovered something both inspiring and worrying...

Our Secret beach - Flamborough, South Landing

In the previous blog, I described the bioblitz shoresearch at Filey and the finds we made. I also mentioned our secret beach, starfish, worries and inspiration. All this and more will be revealed here...

The day after our great day at FIley, my partner Andrea and I made our way to Flamborough South Landing to experience a different search on a very different beach.

Flamborough has many different faces with north, east and south facing beaches. Seals and puffins are among the riches commonly on offer. South landing beach is the least known, with its white cliffs and expanses of sand, rocks and kelp - it’s one of Yorkshire's most mysterious and ultimately awesome beaches. I don’t mean awesome in the glib use of the word, but in the true sense of showing something much bigger than ourselves and not being able to describe it fully.

Flamborough South Beach - Howard Roddie

Flamborough South Beach 90 minutes after low tide, Photo Credit - Howard Roddie

Ana Cowie - Photo Howard Roddie

Ana with a pair of velvet swimming crabs - Photo credit, Howard Roddie

As there were only the three of us on that day, I took the opportunity to find out more about Ana Cowie, our Marine Pollution Officer, and about marine conservation in general before we set out. I’m glad I did this, as there were many more volunteers when we returned a month later.

Ana has spent the last 6 years working for Yorkshire Wildlife Trust, having studied Marine Biology at Swansea University. She inherited her love of wildlife from her father. Following university, she decided to go hands-on and joined the Trust as a Voluntary Trainee and worked in partnership with Boggle hole Youth Hostel where she ran rockpooling sessions. To support herself as a volunteer trainee, she became a car park warden, but, luckily, not in a bleak multi-storey, but at RSPB Bempton Cliffs. After a while she backfilled for the Marine team during a maternity cover before landing her current role as Marine Pollution Officer.

I took the opportunity to ask about my feelings that starfish are in decline. Ana explained that the problem we have is that we don’t have enough numeric data to be able to answer this question fully. All we have is anecdotal evidence. That's why it is so important that the Shoresearch volunteers support Ana with intertidal surveys as we need to collect data to find out what is really going on in our seas. It’s true for everything on the beach, not just starfish. 

Ana explained that another issue we face with data gathering is the natural cycles of nature that can result in blooms and barren periods in 7 to 10 year cycles. This is where teams of volunteers can do something unique - they can keep going back again and again to increase our knowledge over time.

When gathering data, Ana also explained that we have to consider the dependencies of species on others. This means that in order to study just one species we need to gather data on all species over a long time period. For example, starfish appear to have a dependency on mussel beds for food. Anecdotally, mussel beds are in decline throughout Yorkshire. Mussels in turn are dependent on plankton for food. If mussels are in decline, then toxins and bacteria are not filtered from intertidal waters. Furthermore, if mussels are in decline, what does this say about plankton which are massive providers of oxygen to the atmosphere? So, my simple question about starfish maybe isn’t so simple and it begins to trouble me...I strongly suspect I’ll be coming back to this subject!

Flamborough South Landing Walkover survey

At Flamborough, we were taking a precise 'walkover' look at the beach. Ana laid out two buckets about 100 Metres apart facing towards the sea and took their geolocations using what3words.

We used these as a guide and counted only the species found between the visual lines created by the buckets. Once we reached the sea, exactly at low tide (Ana knows how to time the searches to make this happen, both for best use of low tide and the safety of the volunteers) - Ana geolocated the locations at the shores edge directly vertical to the previously placed buckets. This creates a square. Sadly, this meant that Andrea’s butterfish couldn’t be included as it was just outside the square. She did ask for a VAR replay, but it was deemed to be offside...a reference for football fans out there!

I’ve already told you what’s worried me just by asking a question about starfish. Now, I’ll let you know what’s inspired me. As we went down the seemingly uninspiring seaweed covered beach, we found, not surprisingly, I guess, many seaweed species, and many of the amazing species that live on the seaweed.

  Andrea starting from the other Geo-locationary bucket, Howard Roddie

Andrea starting from the other Geo-locationary bucket - Photo Credit, Howard Roddie

We found tiny crabs and we even attracted some young beachcombers who were full of questions. Ana took the time to answer them and hopefully inspire them for the future. As we moved down the beach, the finds changed, a hairy crab here, a velvet swimming crab there, until we got down to the lowest part when the number of crabs exploded.

Crabs under every rock, and once again mating velvet swimming crabs with their back legs adapted like flippers to allow them to swim, The amount of life was astounding - even another lobster, this time the common squat lobster.

A small hairy crab - Howard Roddie

A small hairy crab, with a 20p for size - Photo Credit, Howard Roddie

Common Squat Lobster - Ana Cowie

Common Squat Lobster - Photo Credit, Ana Cowie

We also found numerous sea squirts that like to live on rocks. It’s an animal that develops a backbone early in life when it swims in the sea. Later, it will attach to a rock and absorb the backbone whilst reorganising all of its internal organs to become totally floppy. It's amazing that in this one creature we can see an evolutionary journey that is not entirely forwards in direction.

One of the many types of Sea Squirt by Ana Cowie

One of the many types of sea squirt - Photo Credit, Ana Cowie

Kelp South Landing Ana Cowie

As we got to the lowest part of the beach, kelp appeared, long wide strands of the stuff lying limp and attached to the rocks - Photo Credit, Ana Cowie

Normally the place we were standing on would be under a metre and a half or more of water,  we were standing in the great kelp forest of the North Sea and seeing the creatures that lived there. We could see the breeding crabs and the life that inhabits this ever-changing zone. We could imagine how life first emerged from the sea and onto land. We could see the back and forth, the evolution and challenges, past and present, all in one landscape. Just to stand at the water’s edge viewing this vast kelp forest that stands between the world of air and the world of sea beneath the white cliffs, with all types of life teeming beneath your feet - who wouldn’t feel a real sense of awe?

Kelp forest - Howard Roddie Flamborough

The edge of another world, the Flamborough kelp sea forest - Photo Credit, Howard Roddie

Shoresearch is The Wildlife Trusts' national citizen science survey of the intertidal shore, the exciting world of extremes where the sea meets the land. It's a great way to explore your local coast, learn more about the wildlife found there and add to our understanding of this important habitat.

Volunteers are trained to identify and record the wildlife on shores across the UK. The data collected by this project helps experts to monitor our fragile sea life and better understand the effects of pollution, climate change and invasive alien species. Shoresearch data has been key to designating many of our Marine Conservation Zones. If you'd like to find out more about our amazing marine team then follow this link here