Dreiersee

B - good

9. June 2024

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 10-25% of the surveyed area
Natural Shore Accretion absent on <10% of the shoreline
Lower macrophyte boundary B
(Lower Macrophyte Limit)
Lower Macrophyte Limit 5.8 Meter

Overall RatingB - good

Species
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Gegensätzliche Armleuchteralge

(Chara contraria)

20%

Type: Basic lawn

Zerbrechliche Armleuchteralge

(Chara globularis)

4%

Type: Basic lawn

Hornblättrige Armleuchteralge

(Chara tomentosa)

60%

Type: Basic lawn

Glanzleuchteralgen

(Nitella spec.)

2%

Type: Basic lawn

Faden-Grünalgen

(Vaucheria)

2%

Type: Basic lawn

Ähriges Tausendblatt

(Myriophyllum spicatum)

4%

Type: Submerged vegetation

Krauses Laichkraut

(Potamogeton crispus)

4%

Type: Submerged vegetation

Kamm-Laichkraut

(Stuckenia pectinata)

1%

Type: Submerged vegetation

Teichpflaume

(Nostoc pruniforme)

2%

Type: Floating mats

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Erlen-Bruchwald

(Alnetea glutinosae)

Type: Shore vegetation