Drewitzer See

A - excellent

23. July 2025

Habitat StructuresB

CriterionValue
Score charophyceaeB
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

ImpairmentsC

CriterionValue
Impairment moderately pronounced, rough hornwort, bumpy water lentil-floating mats see species table C
Anthropogenic Influences on <10% of the surveyed area
Natural Shore Accretion absent on <10% of the shoreline
Lower macrophyte boundary A
(Lower Macrophyte Limit)
Shallow Water Macrophyte Limit 4.1 Meter
Middle Macrophyte Limit 12.4 Meter
Lower Macrophyte Limit 13.4 Meter

Overall RatingA - excellent

Species
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Gegensätzliche Armleuchteralge

(Chara contraria)

2%

Type: Basic lawn

Zerbrechliche Armleuchteralge

(Chara globularis)

4%

Type: Basic lawn

Feine Armleuchteralge

(Chara virgata)

1%

Type: Basic lawn

Glanzleuchteralgen

(Nitella spec.)

3%

Type: Basic lawn

Berchtolds Zwerglaichkraut

(Potamogeton berchtoldii)

4%

Type: Basic lawn

Faden-Grünalgen

(Vaucheria)

55%

Type: Basic lawn

Raues Hornblatt

(Ceratophyllum demersum)

6%

Type: Submerged vegetation

Kanadische Wasserpest

(Elodea canadensis)

2%

Type: Submerged vegetation

Nuttalls Wasserpest / Schmalblättrige Wasserpest

(Elodea nuttallii)

4%

Type: Submerged vegetation

Grundnessel

(Hydrilla verticillata)

1%

Type: Submerged vegetation

Ähriges Tausendblatt

(Myriophyllum spicatum)

4%

Type: Submerged vegetation

Großes Nixkraut

(Najas marina)

3%

Type: Submerged vegetation

Spiegelndes Laichkraut

(Potamogeton lucens)

3%

Type: Submerged vegetation

Durchwachsenes Laichkraut

(Potamogeton perfoliatus)

2%

Type: Submerged vegetation

Spreizender Wasserhahnenfuß

(Ranunculus circinatus)

1%

Type: Submerged vegetation

Krebsschere (untergetaucht)

(Stratiotes aloides submers)

1%

Type: Submerged vegetation

Gestrecktes Laichkraut

(Potamogeton praelongus)

4%

Type: Submerged vegetation

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Erlen-Bruchwald

(Alnetea glutinosae)

Type: Shore vegetation