Tarmac

In reply to Charles' request for habitat lists - that is something I have been doing to a certain extent during my south Wales recording over the last 15 years.  It's all a bit imprecise, with my habitats and substrates being rather muddled up.  They include various things such as Churchyard, dune slack, tarmac, rocks by stream (and rocks by river), plus virtually every common tree species.  The trees are tabulated in the Pembrokeshire Bryo Flora, against all the regular epiphytes.

Anyway, there are 130,000 bryophyte records from Carms and Pembs in my dataset, 1900 of which have Tarmac as substrate. The following lists the 81 species that I have recorded at least once on Tarmac in SW Wales, plus the number of records of that species.  Rather few species are regular and the 'tail' of one-offs is very long.

Bryum argenteum	306
Bryum dichotomum	298
Didymodon nicholsonii	253
Ceratodon purpureus	116
Cratoneuron filicinum	93
Bryum capillare var. capillare	85
Barbula unguiculata	77
Syntrichia intermedia	72
Syntrichia latifolia	69
Didymodon insulanus	63
Syntrichia ruralis	56
Brachythecium mildeanum	29
Leptodictyum riparium	29
Calliergonella cuspidata	25
Funaria hygrometrica	22
Didymodon luridus	20
Orthotrichum diaphanum	20
Brachythecium plumosum	19
Didymodon sinuosus	19
Schistidium crassipilum	19
Brachythecium rutabulum	17
Tortula truncata	16
Syntrichia ruraliformis	13
Brachythecium albicans	12
Rhynchostegium riparioides	11
Cinclidotus fontinaloides	9
Dialytrichia mucronata	9
Pseudocrossidium hornschuchianum	8
Syntrichia papillosa	8
Barbula convoluta var. commutata	7
Bryum ruderale	7
Philonotis fontana	7
Scleropodium cespitans	7
Tortula muralis var. muralis	7
Barbula convoluta var. convoluta	6
Pohlia wahlenbergii var. wahlenbergii	6
Amblystegium serpens var. serpens	5
Didymodon rigidulus	5
Grimmia pulvinata var. pulvinata	5
Schistidium apocarpum s.s.	5
Bryoerythrophyllum recurvirostrum	4
Bryum capillare	4
Campylopus introflexus	4
Didymodon fallax	4
Encalypta streptocarpa	4
Eurhynchium hians	4
Hypnum cupressiforme	4
Orthotrichum anomalum	4
Orthotrichum cupulatum var. cupulatum	4
Plagiomnium rostratum	4
Brachythecium rivulare	3
Plagiomnium undulatum	3
Schistidium apocarpum	3
Bryum rubens	2
Homalothecium sericeum	2
Hypnum lindbergii	2
Leskea polycarpa	2
Rhizomnium punctatum	2
Rhytidiadelphus squarrosus	2
Scorpiurium circinatum	2
Syntrichia virescens	2
Tortella nitida	2
Amblystegium tenax	1
Barbula convoluta	1
Bryum pseudotriquetrum s.l.	1
Dichodontium sp.	1
Didymodon vinealis	1
Homalothecium lutescens	1
Hygrohypnum luridum var. luridum	1
Hypnum lacunosum var. lacunosum	1
Orthotrichum cupulatum	1
Plagiomnium affine	1
Plagiomnium cuspidatum	1
Rhynchostegium confertum	1
Rhynchostegium murale	1
Rhytidiadelphus triquetrus	1
Schistidium elegantulum	1
Schistidium rivulare	1
Syntrichia laevipila var. laevipila	1
Syntrichia laevipila var. laevipilaeformis	1
Trichostomum crispulum	1