Dreifelder Weiher, Dreifelden

B - good

6. May 2023

Habitat StructuresB

CriterionValue
Decisive number of formed aquatic vegetation structuresC
Number of different typically formed accretion structures, such as swamp forest, willow bushes, reeds, etc. A

Species Inventory – Habitat TypicalC

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

ImpairmentsB

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 10-50% 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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Kanadische Wasserpest

(Elodea canadensis)

7%

Type: Submerged vegetation

Nuttalls Wasserpest / Schmalblättrige Wasserpest

(Elodea nuttallii)

7%

Type: Submerged vegetation

Gewöhnliches Zwerg-Laichkraut

(Potamogeton pusillus)

1%

Type: Submerged vegetation

Weidengebüsch

(Salicion elaeagni)

Type: Shore vegetation

Röhricht

(Phragmites australis)

Type: Shore vegetation

Großseggenried

(Magnocaricion)

Type: Shore vegetation