Dreifelder Weiher, Dreifelden

B - good

11. May 2024

Habitat StructuresB

CriterionValue
Decisive number of formed aquatic vegetation structuresB
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

ImpairmentsA

CriterionValue
Impairment moderately pronounced, rough hornwort, bumpy water lentil-floating mats see species table A
Anthropogenic Influences on <10% of the surveyed area
Natural Shore Accretion absent on <10% of the shoreline
Lower macrophyte boundary A
(Lower Macrophyte Limit)
Middle Macrophyte Limit 2.5 Meter
Lower Macrophyte Limit 4.0 Meter

Overall RatingB - good

Species
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Faden-Grünalgen

(Vaucheria)

3%

Type: Basic lawn

Tännel

(Elatine spec.)

5%

Type: Submerged vegetation

Kanadische Wasserpest

(Elodea canadensis)

5%

Type: Submerged vegetation

Nuttalls Wasserpest / Schmalblättrige Wasserpest

(Elodea nuttallii)

5%

Type: Submerged vegetation

Krauses Laichkraut

(Potamogeton crispus)

1%

Type: Submerged vegetation

Spreizender Wasserhahnenfuß

(Ranunculus circinatus)

3%

Type: Submerged vegetation

Kamm-Laichkraut

(Stuckenia pectinata)

1%

Type: Submerged vegetation

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Großseggenried

(Magnocaricion)

Type: Shore vegetation

Erlen-Bruchwald

(Alnetea glutinosae)

Type: Shore vegetation