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6.1.2. Weichholz-Auenwald

Salicion albae

Description

Phyonomy and Ecology (© Delarze & al. 2015)

Durch den weisslich silbrigen Glanz der hohen Silberweiden und der etwas weniger häufigen Silberpappel ist die Einheit schon von Weitem zu erkennen. Im Unterwuchs gedeihen viele nährstoffliebende hochwüchsige Gräser. Es handelt sich um Waldtypen mit starker Dynamik. Die Krautschicht wird regelmässig überflutet und manchmal sogar vom Hochwasser weggespült. Die Bäume stocken auf feinkörnigen Sandbänken und -ufern. Die Weichholz-Auenwälder bilden meist schmale Gehölzstreifen entlang der Mittel- und Unterläufe von Flüssen und an den Seeufern des Flachlandes (kolline bis submontane Stufe). Der Boden ist bis zu drei Monate im Jahr wassergesättigt und weist dann sauerstoffarme Verhältnisse auf, die keine biologische Aktivität mehr zulassen. Nach dem Absinken des Wasserstandes bilden die Böden eine sehr fruchtbare Unterlage, die grosse Mengen an Stickstoff enthalten kann.

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 Salix alba L.Silber-Weide
Character species Salix
Character species Salix viminalis L.Korb-Weide
Character species Salix ×fragilis L.Bruch-Weide
Less strictly linked to a specific habitat Acer negundo L.NEschen-Ahorn
Less strictly linked to a specific habitat Epipactis rhodanensis Gévaudan & RobatschRhone-Stendelwurz
Less strictly linked to a specific habitat Humulus lupulus L.Hopfen
Less strictly linked to a specific habitat Impatiens glandulifera RoyleNDrüsiges Springkraut
Less strictly linked to a specific habitat Leucojum aestivum L.Sommerglöckchen
Less strictly linked to a specific habitat Myosoton aquaticum (L.) MoenchWassermiere
Less strictly linked to a specific habitat Phalaris arundinacea L.Rohr-Glanzgras
Less strictly linked to a specific habitat Phragmites australis (Cav.) Steud.Schilf
Less strictly linked to a specific habitat Populus alba L.Silber-Pappel
Less strictly linked to a specific habitat Populus nigra L. subsp. nigraGewöhnliche Schwarz-Pappel
Less strictly linked to a specific habitat Salix myrsinifolia Salisb.Schwarzwerdende Weide
Less strictly linked to a specific habitat Salix purpurea L.Purpur-Weide
Less strictly linked to a specific habitat Salix triandra L.Mandel-Weide
Less strictly linked to a specific habitat Scutellaria hastifolia L.N
Less strictly linked to a specific habitat Solanum dulcamara L.Bittersüsser Nachtschatten
Less strictly linked to a specific habitat Symphytum officinale L.Echte Wallwurz
Less strictly linked to a specific habitat Urtica dioica L.Grosse Brennnessel
Less strictly linked to a specific habitat Viburnum opulus L.Gemeiner Schneeball

Status

Status according to the habitat priority list at the national level

National Priority 3: medium national priority
Need to take action 2:
International responsibility K: none

Status on national Red List 2016

IUCN status:   Endangered

LC: Non menacé

Additional information

IUCN criteria: A1,B1,B2,B4

  • 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 3: 10 to 25 years