Altrheinsee

A - excellent

20. September 2025

Habitat StructuresA

CriterionValue
Score charophyceaeA
Number of different typically formed accretion structures, such as swamp forest, willow bushes, reeds, etc. A

Species Inventory – Habitat TypicalA

CriterionValue
All stoneworts, higher water plants with a trophic index < 2.5 – see species table A

ImpairmentsB

CriterionValue
Impairment moderately pronounced, rough hornwort, bumpy water lentil-floating mats see species table B
Anthropogenic Influences on <10% of the surveyed area
Natural Shore Accretion absent on <10% of the shoreline
Lower macrophyte boundary A
(Lower Macrophyte Limit)
Middle Macrophyte Limit 7.0 Meter
Lower Macrophyte Limit 9.0 Meter

Overall RatingA - excellent

Species
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Gegensätzliche Armleuchteralge

(Chara contraria)

5%

Type: Basic lawn

Steifborstige Armleuchteralge

(Chara hispida)

20%

Type: Basic lawn

Dunkle Glanzleuchteralge

(Nitella opaca)

3%

Type: Basic lawn

Stern-Armleuchteralge

(Nitellopsis obtusa)

18%

Type: Basic lawn

Raues Hornblatt

(Ceratophyllum demersum)

8%

Type: Submerged vegetation

Ähriges Tausendblatt

(Myriophyllum spicatum)

3%

Type: Submerged vegetation

Spiegelndes Laichkraut

(Potamogeton lucens)

3%

Type: Submerged vegetation

Knoten-Laichkraut

(Potamogeton nodosus)

2%

Type: Submerged vegetation

Haarblättriges Laichkraut

(Potamogeton trichoides)

1%

Type: Submerged vegetation

Gewöhnliche Teichsimse

(Schoenoplectus lacustris)

2%

Type: Submerged vegetation

Kamm-Laichkraut

(Stuckenia pectinata)

2%

Type: Submerged vegetation

Gelbe Teichrose

(Nuphar lutea)

1%

Type: Floating leaf lawn

Gewöhnlicher Wasserschlauch

(Utricularia vulgaris)

18%

Type: Floating mats

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Großseggenried

(Magnocaricion)

Type: Shore vegetation

Erlen-Bruchwald

(Alnetea glutinosae)

Type: Shore vegetation