Controversy in the Julian Alps

Abstract We conducted a phytosociological analysis of more than 250 relevés in the Julian Alps and compared them with similar communities elsewhere in the Alps and in the Dinaric Alps to describe the following new syntaxa of alpine swards and heathlands from the alliance Caricion firmae (class Elyno-Seslerietea): Saxifrago squarrosae-Caricetum mucronatae, Saussureo pygmaeae-Caricetum rupestris, Seslerio sphaerocephalae-Dryadetum octopetalae, Homogyno discoloris-Vaccinietum gaultherioidis, Saxifrago paniculatae-Caricetum fuliginosae and Homogyno discoloris-Loiseleurietum caricetosum firmae, the new association Achilleo clavennae-Elynetum myosuroidis from the alliance Oxytropido-Elynion and two new syntaxa from the alliance Loiseleurio-Vaccinion (class Loiseleurio-Vaccinietea): Homogyno alpinae-Vaccinietum gaultherioidis and Empetro-Vaccinietum gaultherioidis rhododendretosum hirsuti. Many species that are rare, of conservation concern or protected in Slovenia occur in the newly described communities.

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The Association Drepanoclado Uncinati-Heliospermetum Pusilli (Arabidetalia Caeruleae, Thlaspietea Rotundifolii) in the Trnovski Gozd Plateau (Slovenia, NW Dinaric Mts)

Hacquetia ◽

10.2478/v10028-009-0001-3 ◽

2009 ◽

Vol 8 (1) ◽

pp. 31-40 ◽

Cited By ~ 3

Author(s):

Boštjan Surina ◽

Branko Vreš

Keyword(s):

Snow Cover ◽

Distribution Area ◽

The North ◽

Close Proximity ◽

Differential Species ◽

Julian Alps

The AssociationDrepanoclado Uncinati-Heliospermetum Pusilli (Arabidetalia Caeruleae, Thlaspietea Rotundifolii)in the Trnovski Gozd Plateau (Slovenia, NW Dinaric Mts)The phytosociology and ecology ofHeliosperma pusillumin freezing ravines of the Trnovski gozd plateau (Slovenia, NW Dinaric Mts) are discussed. The species thrive on shadowy, moist, cold and stable screes of boulders with long-lasting snow cover. The stands belonged to the associationDrepanoclado uncinati-Heliospermetum pusilli (Salicion retusae, Arabidetalia caeruleae, Thlaspietea rotundifolii). Due to close proximity to the Julian Alps, the stands host a significant number of SE - Alpine and N-Illyrian species. Therefore, a new geographical variantPaederota luteais described. Differential species for the geographical variant arePhyteuma scheuchzerissp.columnae, Valeriana saxatilis, Rhodothamnus chamaecistus, andSaxifraga cuneifolia.For less stable screes with smaller rocky particles a new subassociationsalicetosum retusaeis described, and the differential species for the subassociation areSalix retusaandPoa alpina.Stands of the associationDrepanoclado-Heliospermetumvar. geogr.Paederota luteafrom the Trnovski gozd plateau are on the north-westernmost part of the distribution area of the Dinaric allianceSalicion retusae.

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