Obersee

B - good

21. September 2025

Habitat StructuresB

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

Species Inventory – Habitat TypicalA

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

ImpairmentsC

CriterionValue
Impairment moderately pronounced, rough hornwort, bumpy water lentil-floating mats see species table C
Anthropogenic Influences on >25% of the surveyed area
Natural Shore Accretion absent on >50% of the shoreline
Lower macrophyte boundary B
(Lower Macrophyte Limit)
Lower Macrophyte Limit 5.4 Meter

Overall RatingB - good

Species
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Zerbrechliche Armleuchteralge

(Chara globularis)

5%

Type: Basic lawn

Stachelspitzige Glanzleuchteralge

(Nitella mucronata)

7%

Type: Basic lawn

Stern-Armleuchteralge

(Nitellopsis obtusa)

5%

Type: Basic lawn

Faden-Grünalgen

(Vaucheria)

4%

Type: Basic lawn

Raues Hornblatt

(Ceratophyllum demersum)

12%

Type: Submerged vegetation

Kanadische Wasserpest

(Elodea canadensis)

4%

Type: Submerged vegetation

Ähriges Tausendblatt

(Myriophyllum spicatum)

8%

Type: Submerged vegetation

Quirliges Tausendblatt

(Myriophyllum verticillatum)

7%

Type: Submerged vegetation

Großes Nixkraut

(Najas marina)

3%

Type: Submerged vegetation

Spiegelndes Laichkraut

(Potamogeton lucens)

2%

Type: Submerged vegetation

Durchwachsenes Laichkraut

(Potamogeton perfoliatus)

5%

Type: Submerged vegetation

Spreizender Wasserhahnenfuß

(Ranunculus circinatus)

6%

Type: Submerged vegetation

Gelbe Teichrose

(Nuphar lutea)

2%

Type: Floating leaf lawn

Gewöhnliches Quellmoos

(Fontinalis antipyretica)

2%

Type: Floating mats

Gewöhnlicher Wasserschlauch

(Utricularia vulgaris)

10%

Type: Floating mats

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Erlen-Bruchwald

(Alnetea glutinosae)

Type: Shore vegetation