TB-scale – heat supply of the habitat where the species occurs (0–8)

0 – in accordance with the subnival or supraboreal belt
1 – in accordance with the alpine, boreal or tundra belt
2 – in accordance with the subalpine or subboreal belt
3 – in accordance with montane needle-leaved forest or taiga belt
4 – in accordance with the mesophilous broad-leaved forest belt 
5 – in accordance with the submontane broad-leaved forest belt
6 – in accordance with the thermophilous forest or Eurasian forest-steppe belt
7 – in accordance with the submediterranean woodland and Eurasian steppe belt
8 – in accordance with the eumediterranean evergreen belt

WB-scale – occurrence in relation to soil moisture or the water table (1–12)

1 – plants of extremely dry habitats or bare rock surfaces
2 – xero-indicators of habitats with a long dry period
3 – xero-tolerant plants occasionally occurring on wet soils
4 – plants of semi-dry habitats
5 – plants of semi-humid habitats of mesic conditions
6 – plants of usually wet soils
7 – plants of moist but well-aerated soils
8 – plants of moist soils tolerating short flooding
9 – plants of wet, poorly aerated soils
10 – plants of frequently flooded soils
12 – water plants with floating or partly emergent leaves
12 – aquatic plants, usually fully submersed in water

RB-scale – soil reaction of the habitat

1 – extremely acidophilous, explicitly calciphobe plants
2 – intermediate type between RB 1 and RB 3
3 – acidofrequent plants, mostly on acidic soils
4 – moderately acidophilous plants
5 – plants of slightly acidic soils
6 – plants mostly on neutral soils, sometimes also on acidic and basic soils, generally widely tolerant, more or less            indifferent plants
7 – basifrequent plants, mostly on basic soils
8 – basiphilous plants
9 – explicitly calciphilous plants and ultrabasic specialists

NB-scale – in relation to the ammonia and nitrate supply of the habitats (1–9)

1 – only in soils extremely poor in mineral nitrogen
2 – plants of habitats very poor in nitrogen
3 – plants of moderately oligotrophic habitats
4 – plants of submesotrophic habitats
5 – plants of mesotrophic habitats
6 – plants of moderately nutrient rich habitats
7 – plants of soils rich in mineral nitrogen
8 – N-indicator plants of fertilized soils
9 – plants only on hyperfertilized soils, extremely rich in nitrogen

LB-scale – in relation to relative light intensity during the summer

1 – full-shade plants, often receiving less than 1% of the full light
2 – highly shade-tolerant plants
3 – shade plants that also occur in habitats receiving more light
4 – shade – semi-shade plants
5 – semi-shade plants
6 – semi-shade – semi-light demanding plants
7 – semi-light demanding plants mostly living in full light, but also somewhat shade-tolerant
8 – highly light demanding plants
9 – full-light demanding plants of open habitats

CB-scale – in relation to the distribution of plants according to degree of continentality of the climate (1–9)

1 – euoceanic species, reaching Central Europe (CE) only in the West, not reaching Hungary
2 – oceanic species, mainly in Western Europe and in the western part of CE
3 – oceanic-suboceanic species with a center of distribution in CE
4 – suboceanic species, mainly in CE but expanding to the East
5 – intermediate species with slight suboceanic-subcontinental character
6 – subcontinental species with a center of distribution in eastern CE
7 – continental-subcontinental species with a center of distribution in Eastern Europe
8 – continental species reaching only the eastern part of CE
9 – eucontinental species with a center of distribution in Siberia and Eastern Europe

SB-scale – in relation to the salt concentration of the soils (0–9)

0 – species not occurring in saline or alkaline soils
1 – weakly salt-tolerant plants, mainly in non-saline soils [<0.1% Cl-]
2 – oligohaline plants, in soils with extremely low chloride content [0.05-0.3% Cl-]
3 – beta-mesohaline plants, in soils with low chloride content [0.3-0.5% Cl-]
4 – alfa/beta-mesohaline plants, in soils with intermediate chloride content [0.5-0.7% Cl-]
5 – alfa-mesohaline plants, in soils with intermediate chloride content [0.7-0.9% Cl-]
6 – alfa-mesohaline to polyhaline plants, in soils with intermediate to high chloride content [0.9-1.2% Cl-]
7 – polyhaline plants, in soils with high chloride content [1.2-1.6% Cl-]
8 – euhaline plants, in soils of very high chloride content [1.6-2.3% Cl-]
9 – euhaline to hypersaline plants, in soils with extremely high chloride content [>2.3% Cl-]

In case of eurytopic species Borhidi’s scale typically uses the middle value of 5, in contrast with Ellenberg’s approach, which denotes indifferent species with 0 or X.
 

Data source and citation:

Borhidi A. (1995): Social behaviour types, the naturalness and relative ecological indicator values of the higher plants in the Hungarian Flora. Acta Botanica Hungarica 39: 97-181.

Adatbázisközlő cikk (majd)