Messing about with moss… (it’s educational, honest!)

by Caroline Freeman

I am not based at Pwllpeiran, but am perhaps best described as a ’part time’ team member. I’m a first year PhD student and am making good use of Pwllpeiran for my project, studying the impact of management on soil water infiltration, with the aim of understanding links between land use, land management and flood risk. I love being outdoors instead of in an office, so escape up to the hills whenever I can.  I have a background in ecology and environmental education, having worked as a countryside ranger for many years in Scotland, as a warden at Ynyslas Nature reserve and more recently as an Education Officer for Natural Resources Wales. I’ve always enjoyed education work, so when I heard that Pwllpeiran were planning to organise a stall for the University science week I was keen to get involved. They were also planning an activity focusing on sphagnum moss, which plays an important role in flood mitigation, something very relevant to my PhD.

During Science Week, a range of hands-on exhibitions at Aberystwyth University are provided for over 1400 school children from around Wales, as part of British Science Week, to enthuse young people about science. The fair is organised by the University’s Centre for Widening Participation and Social Inclusion (CWPSI).

unknown (005)

Collecting moss on the hill

Lots of different departments get involved and the activities can include anything from guiding robots through mazes, to making slime and playing with model rivers.  We wanted to provide hands-on activities to demonstrate the important role that sphagnum moss plays in storing and filtering water. Luckily, Hannah had the answer – a ‘high-tech’ solution that involved water, a bucket of moss, and a little bit of digging…

Our stall consisted of three activities. Firstly, sphagnum soaking in water was placed in one tub, next to another holding some sponges soaking in water. The schoolchildren could grab a handful of sphagnum to see how much water it holds, and compare it to a sponge. This was a very popular activity, with the pupils enjoying squelching and squishing the sphagnum moss. It gave us a chance to chat to them about how sphagnum could help mitigate flooding, by storing large amounts of water and reducing surface run off into the rivers.

Secondly, three tubs with three different types of vegetation cover were set up next to each other. These had been dug up from Pwllpeiran, there are some nice square shaped holes somewhere up there now…   One tub held peat soil, one had soil and grass, and one had soil and sphagnum. Water could be added to the top of these tubs, which ran through to clear plastic bottles underneath.  Children could see first-hand how much water came through each tub, and also compare the colour of the water and amount of sediment it carried.  There was less sediment in the water that had run through sphagnum, showing the role it plays in filtering water.


Showing how sphagnum helps to manage water

Finally, some microscopes were set up so that the pupils could compare dry and wet sphagnum and see the differences in shape and structure as it took on water.

Schools 4

Sphagnum under the microscope

We had many visitors to the stall, so with a bit of luck some young people went away with a new interest in environment, the natural world and the difference one small plant can make to the natural world.

Following the success of the science fair, we are planning more education group visits to Pwllpeiran, watch this space!