Drewitzer See

B - good

9. June 2024

Habitat StructuresB

CriterionValue
Score charophyceaeC
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)
Shallow Water Macrophyte Limit 4.2 Meter
Middle Macrophyte Limit 8.2 Meter
Lower Macrophyte Limit 10.8 Meter

Overall RatingB - good

Species
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Gegensätzliche Armleuchteralge

(Chara contraria)

2%

Type: Basic lawn

Zerbrechliche Armleuchteralge

(Chara globularis)

5%

Type: Basic lawn

Kanadische Wasserpest

(Elodea canadensis)

2%

Type: Submerged vegetation

Nuttalls Wasserpest / Schmalblättrige Wasserpest

(Elodea nuttallii)

2%

Type: Submerged vegetation

Faden-Grünalgen

(Vaucheria)

65%

Type: Basic lawn

Raues Hornblatt

(Ceratophyllum demersum)

8%

Type: Submerged vegetation

Ähriges Tausendblatt

(Myriophyllum spicatum)

1%

Type: Submerged vegetation

Stachelspitziges Laichkraut

(Potamogeton friesii)

2%

Type: Submerged vegetation

Spreizender Wasserhahnenfuß

(Ranunculus circinatus)

2%

Type: Submerged vegetation

Kamm-Laichkraut

(Stuckenia pectinata)

15%

Type: Submerged vegetation

Untergetauchte Wasserlinse / Dreifurchige Wasserlinse

(Lemna trisulca)

1%

Type: Floating mats

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Erlen-Bruchwald

(Alnetea glutinosae)

Type: Shore vegetation