Figure 6
From: Adaptation and interaction of saxicolous crustose lichens with metals
Photographic monitoring quadrat showing lichen colonization [ Rhizocarpon geographicum agg. (yellow-green), Acarospora sinopica (red-brown) and Rhizocarpon oederi (orange-brown)] in 1993, 2002, 2008 and 2013 at Parys Copper Mountain, Anglesey, Wales. Images manipulated in photoshop to correct for parallax and different camera systems. Yellow arrow indicates ‘thallus expansion’ and white arrow ‘thallus contraction’.