Marxweiher

B - good

7. July 2024

Habitat StructuresB

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

Species Inventory – Habitat TypicalB

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

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 <10% of the shoreline
Lower macrophyte boundary A
(Lower Macrophyte Limit)
Middle Macrophyte Limit 8.0 Meter
Lower Macrophyte Limit 12.0 Meter

Overall RatingB - good

Species
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Gewöhnliche Armleuchteralge

(Chara vulgaris)

3%

Type: Basic lawn

Glanzleuchteralgen

(Nitella spec.)

3%

Type: Basic lawn

Stern-Armleuchteralge

(Nitellopsis obtusa)

30%

Type: Basic lawn

Faden-Grünalgen

(Vaucheria)

20%

Type: Basic lawn

Raues Hornblatt

(Ceratophyllum demersum)

15%

Type: Submerged vegetation

Nuttalls Wasserpest / Schmalblättrige Wasserpest

(Elodea nuttallii)

3%

Type: Submerged vegetation

Ähriges Tausendblatt

(Myriophyllum spicatum)

3%

Type: Submerged vegetation

Spiegelndes Laichkraut

(Potamogeton lucens)

1%

Type: Submerged vegetation

Durchwachsenes Laichkraut

(Potamogeton perfoliatus)

3%

Type: Submerged vegetation

Spreizender Wasserhahnenfuß

(Ranunculus circinatus)

1%

Type: Submerged vegetation

Kamm-Laichkraut

(Stuckenia pectinata)

4%

Type: Submerged vegetation

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Großseggenried

(Magnocaricion)

Type: Shore vegetation