Laacher See

A - excellent

4. September 2021

Habitat StructuresA

CriterionValue
Decisive number of formed aquatic vegetation structuresA
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 A
Anthropogenic Influences on 10-25% of the surveyed area
Natural Shore Accretion absent on <10% of the shoreline
Lower macrophyte boundary A
(Lower Macrophyte Limit)
Shallow Water Macrophyte Limit 2.5 Meter
Middle Macrophyte Limit 6.5 Meter
Lower Macrophyte Limit 22.0 Meter

Overall RatingA - excellent

Species
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Zerbrechliche Armleuchteralge

(Chara globularis)

4%

Type: Basic lawn

Stachelspitzige Glanzleuchteralge

(Nitella mucronata)

3%

Type: Basic lawn

Stern-Armleuchteralge

(Nitellopsis obtusa)

4%

Type: Basic lawn

Faden-Grünalgen

(Vaucheria)

4%

Type: Basic lawn

Raues Hornblatt

(Ceratophyllum demersum)

40%

Type: Submerged vegetation

zartes Hornblatt

(Ceratophyllum submersum)

0%

Type: Submerged vegetation

Kanadische Wasserpest

(Elodea canadensis)

4%

Type: Submerged vegetation

Nuttalls Wasserpest / Schmalblättrige Wasserpest

(Elodea nuttallii)

10%

Type: Submerged vegetation

Ähriges Tausendblatt

(Myriophyllum spicatum)

5%

Type: Submerged vegetation

Quirliges Tausendblatt

(Myriophyllum verticillatum)

35%

Type: Submerged vegetation

Spiegelndes Laichkraut

(Potamogeton lucens)

4%

Type: Submerged vegetation

Durchwachsenes Laichkraut

(Potamogeton perfoliatus)

3%

Type: Submerged vegetation

Gewöhnliches Zwerg-Laichkraut

(Potamogeton pusillus)

3%

Type: Submerged vegetation

Spreizender Wasserhahnenfuß

(Ranunculus circinatus)

4%

Type: Submerged vegetation

Gewöhnliche Teichsimse

(Schoenoplectus lacustris)

10%

Type: Submerged vegetation

Kamm-Laichkraut

(Stuckenia pectinata)

3%

Type: Submerged vegetation

Gelbe Teichrose

(Nuphar lutea)

15%

Type: Floating leaf lawn

Gewöhnliches Quellmoos

(Fontinalis antipyretica)

4%

Type: Floating mats

Untergetauchte Wasserlinse / Dreifurchige Wasserlinse

(Lemna trisulca)

7%

Type: Floating mats

Gewöhnlicher Wasserschlauch

(Utricularia vulgaris)

4%

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