Do we need a substrate project for Lichens.

On iNaturalist we already have a field

Lichen substrate

Substance lichen is growing on. Please use "Host" field to designate species of a living substrate.
https://www.inaturalist.org/observation_fields/189
Allowed values:
unknown 952
bark 6513
wood 713
moss 182
rock 2797
soil 365
leaves 227
artifact 151
bone 13
animal 18

also:

Fungi and Lichen: Substrate

What is the fungus or lichen growing on or in?
https://www.inaturalist.org/observation_fields/11447
Allowed values:
na 7825
soil 467
rock 49
wood and leaf litter 438
unsure 41

There are other fields (lots related to Lichens, many duplicates - see https://www.inaturalist.org/observation_fields?commit=Search&page=2&q=lichen&utf8=%E2%9C%93)

However, it seems that surely the substrate "Rock" (and indeed soil?) is probably crucial - as important as the category rock itself.

There are several "open" fields for Rock Type, but these are problematic. Under geology, we have several, but none are comprehensive (and how comprehensive do we need to be?).
https://www.inaturalist.org/observation_fields/319
https://www.inaturalist.org/observation_fields/2753
https://www.inaturalist.org/observation_fields/7443 (Protea Atlas & CREW - s Afr)

respectively these are:

  • Not Applicable: 269 | 0 | 0
  • Unknown: 0 | 23 | 12
  • Other: 0 | 3 | 24

Sandstone: 202 | 62 | 831
Tertiary Sands: 0 | 0 | 150 Applicable to geology? But Namib Desert!
Limestone 11 | 5 | 66
Shale: 0 | 1 | 65
Granite 0 | 0 | 25
Ferricrete: - | - | 13
Silcrete: - | - | 12 How does one distinguish this from Ferricrete - merge?
Silt-clay-stone 11 | - | - What does this mean - scrap!
Quartzite 0 | 4 | 7 But is it really so easy to tell "sandstone" from "quartzite" - and what about Quartz?
Conglomerate: - | - | 9 Rather code for the constituent geology, unless not specific?
Dolerite: 0 | 0 | 7
Basalt 3 | 2 | 1
Alluvials - | 2 | - What does this mean? (either soil or sand/conglomerate) - scrap!
Dolomite 0 | - | -
Serpentine 0 | - | -

Others (not used in any projects) - these seem to be superfluous (some being metamorphosed versions of the above)
Volcanic
Schist
Gneiss
Marble
Chert
Chalk
Gypsum
Andesite
Diorite
Ultrabasics

Your thoughts??

由使用者 tonyrebelo tonyrebelo2023年11月20日 10:00 所貼文

評論

From our data on lichens so far we have:
sandstone: 4,399
granite 837
dolerite 351
shale 251
basalt 133
quartz 115
gneiss 107
limestone 49
ferricrete/silcrete 11
dolomite 9
serpentine 0

發佈由 tonyrebelo 7 個月 前

@ian_medeiros - is it worthwhile coding this up?

發佈由 tonyrebelo 7 個月 前

I think it would be useful! What do you think of this? https://www.inaturalist.org/observation_fields/17159

發佈由 ian_medeiros 7 個月 前

Needs an unknown, otherwise looks great.

發佈由 tonyrebelo 7 個月 前

Great. Now we have to fill in the fields.

Have started this, but it should take a few more hours to complete.
Only my observations appear to have suitable data? Please note: if more than one geology type listed, then the rarer one will be used. (the values above will double-count those with more than one type listed)
https://www.inaturalist.org/observation_fields/17159
((note too: should be used with "Lichen substrate": I cannot automatically untangle if the geology refers to rock or soil))

發佈由 tonyrebelo 7 個月 前

LICHENS FOUND ON (topmost few if more than 1 observation)

** sandstone
113 Lasallia rubiginosa Red Toadskin Lichen
65 Genus Pertusaria Pore Lichens
37 Xanthoparmelia hottentotta Cape Rock Shield
25 Rhizocarpon lecanorinum Crescent Map Lichen
20 Teloschistes flavicans Golden Hair-Lichen

16 Genus Umbilicaria Rock Tripes
16 Genus Diploschistes Crater Lichens
16 Complex Neofuscelia Brown Rock Shield Lichens
15 Genus Aspicilia Sunken Disk Lichens
14 Genus Pseudocyphellaria Specklebelly Lichens
11 Lobaria pulmonaria Tree Lungwort Lichen

10 Heterodermia leucomelos Elegant Fringe Lichen
8 Genus Parmelia Shield Lichens
8 Genus Leptogium Skin Lichens
8 Siphula verrucigera Cape Mountain River Lichen
8 Diploicia africana Cape Pleated Lichen

7 Chrysothrix candelaris Powder Gold-dust Lichen
7 Usnea maculata Blotchy Beard Lichen
7 Cladonia subpungens Smelly Pixiecup
6 Cladia aggregata Common Cladia

5 Xanthoria parietina Common Sunburst Lichen
5 Crocodia aurata Gold Specklebelly Lichen
5 Roccellina hypomecha Cape Beach Lichen

** granite
9 Genus Acarospora Cobblestone Lichens
8 Dufourea capensis Cape Flame Lichen
7 Genus Parmotrema Ruffle Lichens
7 Genus Diploschistes Crater Lichens
7 Complex Neofuscelia Brown Rock Shield Lichens

5 Xanthoparmelia frondosa Frond Shield Lichen
4 Genus Phaeophyscia Wreath Lichens
4 Genus Usnea Beard Lichens
4 Family Collemataceae
3 Genus Lepraria Dust Lichens
3 Genus Aspicilia Sunken Disk Lichens
3 Tephromela atra Black-eye Lichen
3 Combea mollusca Mollusc Lichen

** dolerite
39 Genus Acarospora Cobblestone Lichens
9 Xanthoparmelia hottentotta Cape Rock Shield
4 Complex Karoowia Karoo Lichens
2 Complex Neofuscelia Brown Rock Shield Lichens

** shale
10 Genus Acarospora Cobblestone Lichens
3 Complex Neofuscelia Brown Rock Shield Lichens
2 Genus Buellia Button Lichens
2 Genus Psora Fishscale Lichens
2 Genus Dermatocarpon Silverskin Lichens
2 Genus Dufourea Flame Lichens
2 Xanthoparmelia hottentotta Cape Rock Shield

** basalt
19 Genus Xanthoparmelia Rock Shield Lichens
5 Family Teloschistaceae Sunburst Lichens, Firedots, and Allies
4 Genus Acarospora Cobblestone Lichens
2 Genus Dimelaena Mountain Lichens

** gneiss
4 Genus Siphula Water Lichens
4 Xanthoparmelia hottentotta Cape Rock Shield
3 Rhizocarpon lecanorinum Crescent Map Lichen
2 Genus Acarospora Cobblestone Lichens
2 Xanthoparmelia frondosa Frond Shield Lichen
2 Complex Namakwa Namaqua Lichens

** limestone
** ferricrete/silcrete

Many thanks to everyone who has contributed.

發佈由 tonyrebelo 7 個月 前

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