Monday 24 June 2019

Chalk And Cheese

Just south-east of Cambridge are a couple of small nature reserves and they made a pleasant jaunt for me on a rather warm and humid Sunday morning. The two reserves have a very different history and look completely different too. Lets go and investigate...

Cherry Hinton Chalk Pit



Just inside the present city boundary lies an abandoned chalk quarry. Material from the quarry was used to build the colleges and other buildings in Cambridge and also to make lime for agricultural use. Nothing has been extracted from these works since the 1980s and the quarry is being allowed to return to a more natural state.



The site gives botanists an opportunity to study how plants colonise what was originally bare chalk. As you can see there's already quite a floral show, though with a fairly limited range of species. Most of the yellow in the scene above is Bird's-Foot Trefoil, or Eggs-and-Bacon as it's sometimes known from the colour of its flowers. It's a naturally occurring plant in England whereas elsewhere it can be a troublesome invasive species. But there are other yellow flowers here too.....



Above is Yellow-Wort, a plant often found on chalky soils.



The chalk itself was laid down when this area was underwater, about 100 million years ago. It consists mainly of the microscopic remains of algae and unsurprisingly it took a long while to accumulate - about 1cm every 1,000 years, it's been calculated! Chalk is usually white, but here it contains layers that are tinted yellow or pink by impurities too. You can just about make out these in the photo above.



Various Dandelion-like Hawkweeds are also colonising this unpromising environment. And those cliffs around the quarry edge are home to nesting Peregrine Falcons. They are also sometimes spotted on the University's buildings in the centre of Cambridge as they await their lunch, a nice fat pigeon perhaps, to flutter into view.



One part of the reserve has not seen any quarrying activity for a couple of centuries and has, over the years, developed into an area of woodland. It was here that I came across a stand of St John's Wort (below).



Then it was time to pedal on to....

Fulbourn Fen

Nothing could be more different from the recovering landscape of the chalk-pits than the unimproved meadowland of Fulbourn Fen. Although I couldn't resist calling the post "Chalk And Cheese" I don't really know if cheese was produced from the milk of the animals that have grazed this area for centuries, but it seems likely.



These traditionally managed hay meadows have retained their original glory, having never been ploughed or "improved" by the application of chemical fertilizers or pesticides. Although they are still privately owned, they are managed with the help of the Wildlife Trust and the public are allowed to roam around on the network of paths and enjoy the scenery.



Wildflowers grow here in abundance and there are plenty of bees and butterflies taking advantage of the nectar supply.



In summer the fields are reasonably dry with just a few small ponds to supply water for livestock.



In one of the wetter parts Wild Iris or Flags were blooming, but these are not the flowers that attract the human visitors...



Orchids, particularly the Southern Marsh Orchid, grow in hundreds in one of the meadows. And there are smaller numbers of at least five other species of orchid.



There are still several large trees spreading their shade for the benefit of the cattle that graze here in the heat of summer. On Sunday there were a couple of families picnicking here - young naturalists in the making perhaps. And there by the fence was my faithful "horse" waiting to take me home.





Take care.


20 comments:

  1. Hi John - Chalk and Cheese seems an excellent name. It's just so lovely to see wild areas where the plants can just move in and enjoy their peace and quiet too. Thanks for the ride around ... excellent as we know we'll get when we visit - gorgeous! Cheers Hilary

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  2. Well done with the name. As you say, John, these two areas are quite different, but both very attractive. I should imagine that the old quarry has the potential to become a first rate natural site, and the chance to study plant succession must be a welcomed opportunity for the botanists and plant scientists.

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  3. I love that the quarry is returning to nature John. Nature is totally amazing in its ability to regenerate in difficult, sometimes almost impossible situations. Enjoyed seeing both 💙

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  4. It's remarkable how nature reclaims such a place over time.

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  5. It's so good to see the quarry filled with flowers and grasses. So very beautiful there. I love your "horse" leaning against the fence!

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  6. Such different flora on the two sites John - very interesting. I always though that Birds' foof trefoil was called 'Lady's fingers' - maybe that is just a name local to Lincolnshire. It is one of my favourites.

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  7. Nature is amazing. The quarry is coming back to life with flowers, such a beautiful sight to see.

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  8. Wonderful how nature quickly recolonises if we let it.

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  9. It's a great site! St Johns Wort grows all over where I work

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  10. I so love that big old tree! Isn't it about the most perfect thing ever? Bird's Foot Trefoil grows here, too. I think the flower is so pretty.

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  11. More wonderful English countryside. Thank you.

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  12. The contrast is fascinating! Another great outing!

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  13. Nice to see an old chalk mine returning to its natural state. Lovely flowers!

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  14. It is great how nature is reclaiming the chalk pits. Your walk was very pretty.

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  15. It must be interesting to see what flowers will grow in particular spots like this one.
    Lovely photos John.

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  16. I always get a little bit excited when I see you naming the wild flowers. Every wild flower has a name, in spite of many people here just classing them all as "weeds". Interesting to see the different species that like to grow in Chalk.

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  17. Beautiful wildflowers...and that orchid! Gorgeous!

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  18. It's fascinating to see what plants recolonize abandoned areas, which species come in first, etc. I recall seeing studies on old vineyards that had been abandoned in my area in California. Both these nature reserves look like beautiful spots!

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  19. A most interesting post. Thank you for the peek into these two different areas, and the lants that call them home...

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