Downland wildlife on the Powell Day walk

By Mary Shotter, Biology Technician

The wooded slopes and rolling hills of the South Downs are a very special landscape and provide a habitat for a wide and interesting variety of species, so Powell Day provided a perfect opportunity to see them at their best in the early spring sunshine.

Not far from the start point in the Queen Elizabeth Country Park, as we climbed gradually along a valley between War and Holt Downs, the browns and greens of the landscape were punctuated by a large patch of bright yellow coltsfoot, one of a few plants with the unusual habit of flowering before any leaves emerge. It is the leaves from which its name derives – when they do eventually unfurl in April they are large and hoof shaped.

Along the track were also patches of Juniper, the berries of which are used for flavouring gin. Once common, it is now a rare sight, due to habitat loss.

The colourful bracket fungus, turkeytails, covered piles of logs besides the chalky tracks. Further along between Buriton and Ditcham, at Coulters Dean, the path turned off the South Downs Way and past a field and grassy bank which was dotted with huge mounds of yellow meadow ant nests. Each one will house between 8,000 and 40,000 ants, feeding their larvae on the roots of Downland plants such as wild thyme. From here the track wound uphill through beech woodland, carpeted with wild garlic, the smell of which became obvious as it was crushed beneath our feet.

On the open grassland of Ditcham Park, skylarks were singing, hovering effortlessly, high above the ground, then parachuting down onto the fields, before ascending again. A lone red admiral butterfly flew past – most red admirals are migratory but a few like this one, will have hibernated and emerged into the early spring warmth in search of nectar. In the more open landscape around Chalton, buzzards and a lone red kite flew overhead, watching as we re-entered the Queen Elizabeth Park and after three hours made our way past yew and pine trees down to the finish.

The Chemical History of Nicotine – Science Lunchtime Lecture Series

By Mary Shotter, Biology Technician

As part of the Science Lunchtime Lecture Series, A Level science students and members of 3i were joined by Dr Harry Pearson, former Bedales Housemaster and Head of Science/Chemistry, in the Simon Lecture Theatre to explore ‘The Chemical History of Nicotine’.

The intellectually stimulating talk began with the discovery of the New World by Christopher Columbus in 1492, where European explorers were offered a ‘fuming material’ called zikari, made from the leaves of the plant Nicotiana tabacum by indigenous people. Harry’s talk then led us to 1560s Paris, when diplomat and scholar Jean Nicot de Villemain brought in seeds from the Americas and introduced the plant to France. Paris Society was polarised by this new ‘magic’ substance, now named ‘nicotine’ after Jean Nicot.

From France, Harry took us to 1800s Germany, where nicotine was first isolated in Heidelberg University – its chemical structure being determined in 1891. After an in depth look at nicotine’s chemical properties and the use of nuclear magnetic resonance (NMR) to determine the molecular structure, the talk concluded with a look at nicotine’s effects on the body, the work of Sir Richard Doll – the first scientist to discover the link between smoking and lung diseases in 1954 – and brought us to the present day with the introduction of nicotine patches and vaping.

Harry’s talk focused not only on the science of nicotine, but also encompassed many other topics, including stories of Bedales past, the difficulty of learning German and the witty quotes of Mark Twain.

The next Lunchtime Lecture take place on 12 November, when Dr Tim Mason of Portsmouth University will speak on ‘Edward Jenner and the Story of Vaccines’.