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4.1.1. Wärmeliebende Kalkfels-Pionierflur

Alysso-Sedion

Description

Phyonomy and Ecology (© Delarze & al. 2015)

Der Lebensraum weist eine lückige, kleinwüchsige Vegetation auf, in der vor allem 1- bis 2-jährige Krautpflanzen (Therophyten) und Blattsukkulenten dominieren. Die Bestände bewachsen sonnige Felsböden in tieferen Lagen. Die Pflanzen kommen durch ihre Bodennähe in den Genuss eines günstigen winterlichen Mikroklimas, wodurch der Beginn der Vegetationszeit sehr früh einsetzt. Die meisten Arten blühen zeitig im Frühjahr und trocknen bereits nach wenigen Wochen aus. Danach trotzen nur noch Blattsukkulenten, einige spät blühende Therophyten sowie erdbewohnende Kryptogamen den extremen Verhältnissen. Der fragmentarische Rohboden besteht aus einer dünnen Auflage aus Feinerde, entweder am Rand der Felsplatten oder in Vertiefungen der Felsen. Im Sommer trocknet die Unterlage, die stets kalkhaltig und nährstoffarm ist, vollkommen aus. Das Alysso-Sedion wurde lange als Bestandteil der Kalk-Trockenrasen betrachtet. Er bildet sehr häufig Mosaike mit dem Xerobromion (4.2.2) und dem Stipo-Poion (4.2.1.1).

Distribution map

  • Calculation method

    Current distribution: Weighted sum (number of characteristic and frequent species) per hectare based on current observations. Reported characteristic species are given a weighting of 10, while others are counted without weighting. The habitat is considered to be present in a grid cell (5 x 5 km) if it contains at least one hectare with a minimum value of 11 points.

    Potential distribution: Weighted sum (number of characteristic and frequent species) per hectare based on species distribution models. The calculation strategy is the same as for current distribution, but maps derived from species distribution models are used instead of current observations.

Pictures

List of species

bold Dominant species, influencing the appearance of the habitat
Character species Character species
Less strictly linked to a specific habitat Less strictly linked to a specific habitat


Scientific name English name
Character species Alyssum alyssoides (L.) L.Kelch-Steinkraut
Character species Arabis auriculata Lam.Öhrchen-Gänsekresse
Character species Cerastium brachypetalum Pers. subsp. brachypetalumGewöhnliches Kleinblütiges Hornkraut
Character species Cerastium pumilum CurtisNiedriges Hornkraut
Character species Clypeola jonthlaspi L.Schildschötchen
Character species Dianthus gratianopolitanus Vill.Grenobler Nelke
Character species Erophila praecox (Steven) DC.Frühes Frühlings-Hungerblümchen
Character species Hornungia petraea (L.) Rchb.Steinkresse
Character species Micropus erectus L.Falzblume
Character species Minuartia hybrida (Vill.) Schischk.Zarte Miere
Character species Minuartia rubra (Scop.) McNeillBüschelige Miere
Character species Veronica praecox All.Früher Ehrenpreis
Less strictly linked to a specific habitat Acinos arvensis (Lam.) DandyFeld-Steinquendel
Less strictly linked to a specific habitat Allium lusitanicum Lam.Berg-Lauch
Less strictly linked to a specific habitat Arenaria leptoclados (Rchb.) Guss.Zartes Quendelblättriges Sandkraut
Less strictly linked to a specific habitat Arenaria serpyllifolia L.Gewöhnliches Quendelblättriges Sandkraut
Less strictly linked to a specific habitat Cerastium glutinosum Fr.Blasses Hornkraut
Less strictly linked to a specific habitat Cerastium semidecandrum L.Sand-Hornkraut
Less strictly linked to a specific habitat Erodium cicutarium (L.) L'Hér.Gemeiner Reiherschnabel
Less strictly linked to a specific habitat Erophila verna (L.) DC.Gewöhnliches Frühlings-Hungerblümchen
Less strictly linked to a specific habitat Melica ciliata L.Wimper-Perlgras
Less strictly linked to a specific habitat Petrorhagia prolifera (L.) P. W. Ball & HeywoodSprossende Felsennelke
Less strictly linked to a specific habitat Poa badensis Willd.Gewöhnliches Badener Rispengras
Less strictly linked to a specific habitat Saxifraga tridactylites L.Dreifingeriger Steinbrech
Less strictly linked to a specific habitat Sedum acre L.Scharfer Mauerpfeffer
Less strictly linked to a specific habitat Sedum album L.Weisser Mauerpfeffer
Less strictly linked to a specific habitat Sedum anopetalum DC.NBlassgelber Felsen-Mauerpfeffer
Less strictly linked to a specific habitat Sedum sexangulare L.Milder Mauerpfeffer
Less strictly linked to a specific habitat Taraxacum laevigatum aggr.Glatter Löwenzahn
Less strictly linked to a specific habitat Teucrium botrys L.Trauben-Gamander
Less strictly linked to a specific habitat Thlaspi perfoliatum L.Stängelumfassendes Täschelkraut
Less strictly linked to a specific habitat Trifolium campestre Schreb.Feld-Klee
Less strictly linked to a specific habitat Trifolium scabrum L.Rauer Klee
Less strictly linked to a specific habitat Trisetum cavanillesii Trin.Cavanilles' Goldhafer
Less strictly linked to a specific habitat Valerianella carinata Loisel.Gekielter Ackersalat
Less strictly linked to a specific habitat Vulpia unilateralis (L.) StaceStrand-Federschwingel

Status

Status according to the habitat priority list at the national level

National Priority K: no national priority
Need to take action 1:
International responsibility K: none

Status on national Red List 2016

IUCN status:   Near threatened

LC: Non menacé

Additional information

IUCN criteria: A1

  • Legend
    COCollapsed
    CRCritically Endangered
    ENEndangered
    VUVulnerable
    NTNear Threatened
    LCLeast Concern

Legal protection (NCHO appendix 1)

Natural habitat worthy of protection

Regeneration status 2016

Regeneration class 4: 25 to 50 years