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Suffolk Symbionts

Posted on March 2, 2012 | 9 comments

During our trip to the east coast a couple of weeks ago a fair chunk of our time was spent wandering around churchyards and woodland and scrubby heathland. Because the air is so clean in that part of the world the gravestones and the trees, and any dead and rotting wood hosts numerous species of lichen.

A robin watching over the lichen encrusted gravestones in Dunwich St Andrews graveyard

I think lichens are highly under-represented in the annals of popular natural history, but having said that I’ve seen some superb posts from fellow natural history bloggers in the recent past, most notably from ‘btweenblinks‘ and ‘Montana Outdoors‘

There have not been so many from this side of the Atlantic though so here’s my attempt to showcase some of my local lichens. Lichens are a symbiosis between a fungus and an alga where the fungus gathers nutrients from the substrata and the alga provides the photosynthetic apparatus. I’ve read that there are around 1800 species of lichen in the UK alone and up to 20000 globally. They provide homes for spiders and small insects, and have provided various dyes for colouring cloth and the active ingredient of litmus pH indicator is derived from a lichen. And they make great pictures:

Oak moss or antler lichen, Pseudevernia furfuracea

Lichens are difficult to identify without a microscope and reagents for analysing them and the substrata they are growing on, so the identifications in this post are from this guide from the Natural History Museum.

I found the antler lichen growing on a deciduous tree at Dunwich Friary and I think there are probabaly another three species of lichen in this photograph, including the common green shield lichen, Flavoparmelia caperata. I took the picture by standing back a couple of metres and using ISO 400, F/8.0 and shutter speed 1/60s, and there was just sufficient light to make it work. The trees were reverberating with the song of great tits and robins while I was on my lichen hunt making it a very enjoyable couple of hours.

Pleurosticta acetabulum

Pleurosticta acetabulum doesn’t have a common name in my NHM guide. I really like the colours in this image, the background is the reedbeds of Minsmere and the diffuse red/brown of the defocussed reeds accentuates the greens, greys and browns of the lichen.

Leafy xanthoria, Xanthoria polycarpa

The leafy xanthoria was ubiquitous in this part of the world, many of the trees were festooned with it. This one was also at RSPB Minsmere with the reedbeds in the background and I like the warm colours especially as this was on a very cold, grey morning.

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Posted in Flora and fungi, Lichen, RSPB reserves, Suffolk coast, UK wildlife

Tagged alga, antler lichen, btweenblinks, common green shield lichen, Dunwich, Dunwich Friary, Dunwich Heath, Dunwich St Andrews, East Anglia, Erithacus rebecula, Flavoparmelia caperata, fungus, great tit, Leafy xanthoria, lichen, Minsmere, Montana Outdoors, Natural History Museum, oak moss, Parus major, Pleurosticta acetabulum, Pseudevernia furfuracea, reedbeds, robin, RSPB Minsmere, symbiosis, Xanthoria polycarpa

Springtime sojourn to the Suffolk coast

Posted on February 18, 2012 | 12 comments

Last week we headed off to to the seaside for a few days and our chosen detination was Dunwich, a tiny village on the Suffolk coast which in medieval times was the capital of the region and a thriving, wealthy port for moving cargo and people between East Anglia and the European mainland. It’s an amazing place with very interesting history which I wrote about in a post last year.

We stayed in my favourite inn called The Ship which has panoramic views over the Dingle Marshes which stretch several miles north to Walberswick, which is renowned for it’s annual crabbing champi0nship. It is also where the king of art nouveau, Charles Rennie Mackintosh moved to after he had abandoned architecture to become a watercolourist and where the series of flowers known as the ‘Walberswick collection’ was painted.

The marshes along this part of the coast are full of wildlife, including rare birds such as harriers and bittern, mammals such as otters as well as a host of marsh and heathland plants and the associated fauna. It’s a wonderful place. The view from our window at The Ship was generally dominated by low grey cloud which occasionally saw fit to rain on us, but even so the wildlife was much in evidence without even leaving the inn:

The tree opposite our window played host to numerous small birds including this house sparrow (Passer domesticus, Dansk: gråspurv) and blue tit (Cyanistes caerulius, Dansk: blåmejse)
And a couple of hundred metres beyond the tree were some pools of rainwater where lapwing and these teal were on parade each morningAnd beyond that was a ditch where a little egret (Egretta garzetta, Dansk: silkehejre) was hunting every day

So, as you can imagine, it wasn’t so easy to haul myself away from my nice centrally heated room and my cup of tea and go out into the wintry mornings, when I could sit by the window and see all this! But I eventually extricated myself and walked a circuit of the village taking in the local church and graveyard, the remains of the Franciscan Friary and the woods inbetween, and was very adequately rewarded. The local church has the remains of a medieval leper hospital in its grounds which is a fascinating place historically, but is now inhabited solely by sheep and snowdrops (Galanthus nivalis). There were no sheep while we were in there but the snowdrops were growing out between the melting snow.

Snowdrops infront of the be-lichened walls of the ancient leper hospital in the grounds of St James church

A lapwing pair pausing in the Friary between displays of breathtaking aerobatic excellence

The Friary is long deserted by the Franciscan brethren and is now a ruin, but it still plays host to the local wildlife. As well as the lapwing (Vanellus vanellus, Dansk: vibe) , there was a songthrush (Turdus philomelos, Dansk: sangdrossel) foraging amongst the grassy tufts and robins (Erithacus rubecula, Dansk: rødhals) singing from the trees beyond.

A deciduous tree adjacent to the Friary was completely covered in lichen

I don’t know which species the lichens are on the tree trunk but I think there are at least four. The flat resupinates can be seen on old wood and even brick walls in towns and villages, but the feathery species are much more susceptible to atmospheric pollution and therefore only exist where the air is clean.

Beyond Dunwich to the south is the gorse covered heathland of Dunwich Heath which is owned and managed by the National Trust, and beyond that is the RSPB reserve at Minsmere where I watched a marsh harrier quartering the reedbeds and where another walker told me he had seen smew and a bittern in one of the lakes on the reserve. I went to look there but I didn’t see either, but I did see other birds, and some splendid lichens. Of which more in a later post.