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.
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:
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 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.
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.