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Baden-Württemberg - Lichens of Wales

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The causes are many, the sensitivity to air<br />

pollution plays an important role.<br />

For <strong>Baden</strong>-<strong>Württemberg</strong> (valid also for the<br />

immediate environs) after the frequency<br />

statements the statement in parentheses about the<br />

endangerment is in the form <strong>of</strong> the number from<br />

the Red List. They mean<br />

0: Extinct or missing<br />

1: In danger <strong>of</strong> extinction<br />

2: Strongly endangered<br />

3: Endangered<br />

R: Extremely rare<br />

Annotations <strong>of</strong> the categories (according to the<br />

definitions <strong>of</strong> the BfN/Institute for vegetation<br />

studies):<br />

1: Species which are so severely endangered that<br />

they face extinction, if the threatening causes<br />

continue. One <strong>of</strong> the following criteria must be<br />

fulfilled: (1) the species is so considerably<br />

regressed that they are rare; the remaining<br />

population is endangered; (2) they are now rare<br />

and because <strong>of</strong> continuing human influence<br />

extraordinarily strongly endangered.<br />

2: Species, which are extensively regressing or<br />

because <strong>of</strong> continuing or foreseeable human<br />

influence are strongly endangered. One <strong>of</strong> the<br />

following criteria must additionally be fulfilled:<br />

(1) the species has already disappeared in the<br />

greater part <strong>of</strong> the region; (2) it is very rare to<br />

rare; (3) it is still moderately frequent, but<br />

strongly endangered; (4) the diversity <strong>of</strong> their<br />

formerly colonized habitat is extensively<br />

restricted.<br />

3: Species, which are moderately regressing or<br />

because <strong>of</strong> continuing or foreseeable human<br />

influence are endangered. One <strong>of</strong> the following<br />

criteria must additionally be fulfilled: (1) the<br />

species is already very rare in the greater part <strong>of</strong><br />

the region; (2) it is rare to moderately frequent;<br />

(3) it is still frequent, but strongly endangered;<br />

(4) the diversity <strong>of</strong> the formerly colonized habitat<br />

is restricted.<br />

R: Extremely rare species at this time. They are<br />

not appreciably regressed or not noticeably<br />

endangered and they may on the basis <strong>of</strong> their<br />

scarcity be suddenly destroyed or essentially<br />

decimated due to unforeseen developments, e.g.<br />

by a combination <strong>of</strong> unexpected human intrusion<br />

or natural events like rock slides. A statement in<br />

italics means that the classification must be seen<br />

as relatively uncertain. An asterisk (*) after the<br />

Red List Rating means that the species in the<br />

environs around <strong>Baden</strong>-Württem-berg is clearly<br />

less endangered.<br />

In the case <strong>of</strong> species not occurring in<br />

<strong>Baden</strong>-<strong>Württemberg</strong> (as a rule after the statement<br />

<strong>of</strong> natural area) the following symbol was used:<br />

+: extinct, (+++): in danger <strong>of</strong> becoming extinct,<br />

(++): strongly endangered, (+): endangered, *:<br />

extremely rare. Species with especially<br />

remarkable value <strong>of</strong> resistance to (mostly acid)<br />

air pollution were designated as toxic tolerant.<br />

4.5 Statements <strong>of</strong> Plant Geography<br />

For the characterization <strong>of</strong> plant areas one uses<br />

certain geographical statements in which<br />

particularly the north to south extending<br />

(zonation), in addition to the west to east<br />

extending (continents) and the elevational<br />

distribution. The clarification <strong>of</strong> the concepts<br />

used here comes from the following combination.<br />

The definition <strong>of</strong> the individual geographic<br />

regions is from the diagram (refer to MEUSEL,<br />

JAEGER & WEINERT).<br />

4.5.1 Floral Regions and Floral Elements<br />

(Europe)<br />

arct = arctic: Tundra region north <strong>of</strong> the polar<br />

tree line. Many <strong>of</strong> the species occurring in this<br />

region are also to be found in the alpine zone <strong>of</strong><br />

the vegetation zones lying further south<br />

(arct-alp).<br />

bor = boreal: Region <strong>of</strong> the boreal pine belt.<br />

The species occurring in this region are further<br />

found for the most part in the montane and high<br />

montane zones <strong>of</strong> the temperate (central<br />

European) zone.<br />

s’bor = southern boreal: Southern region <strong>of</strong> the<br />

boreal zone (narrowing toward the east).<br />

mieur = middle European (or temperate):<br />

Temperate zone, region <strong>of</strong> green summer<br />

deciduous forests (in part intermixed with pine<br />

forests).<br />

s’mieur = southern middle European: Southern<br />

region <strong>of</strong> the temperate zone.<br />

smed = sub-Mediterranean: Region <strong>of</strong> green<br />

summer dry forests (above all oak forests) and<br />

steppes, northern Mediterranean region.<br />

med = Mediterranean: Non deciduous evergreen<br />

and pine forests, steppes and semi-desert<br />

southern Mediterranean.<br />

atl = Atlantic: Deciduous forested region near<br />

the Atlantic (in central Europe eastern to NW<br />

Germany, central and upper Rhine).<br />

subatl = Sub Atlantic: Region <strong>of</strong> the deciduous<br />

forest <strong>of</strong> west and central Europe. Species in the<br />

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