Montag, 9. Mai 2011

Artlice of the week - Field Trip to Lake Unterbach

Last weekend I've made a little field trip to the “Unterbacher See” (Lake Unterbach) in the west of Düsseldorf, Germany. This lake is a so called excavation lake; created during the years of 1926 and 1975 by excavating gravel and sand. After the end of the excavation, it became one of Düsseldorfs most popular recreation areas. Today the lake is used for sailing, rowing and also swimming. There are two beaches at the south and north shore and also a nude beach. During World War II there was also a fake airfield of the German “Luftwaffe” at the lake to deceive the allied bombers.

The Lake Unterbach is surrounded by a large forest area, which is called the “Eller Forst”. There are also grasslands and wet lands. In this article of the week I will introduce these areas in more detail and present some species I have found during my walk. Some of these species will be the subject of future “Plant of the Day” articles.

I will divide the Article into three parts: The Eller Forst, the Wetland and last but not least the Lake Unterbach.

I. Eller Forst

a) Introducion
The “Eller Forst” is a large forest area, which surrounds the Lake Unterbach. It's a typical, partially man-made forest with many acer, oaks and beeches. Unfortunately I'm not able to say, which type of plant society we have here, but I would say, that it's a typical beech forest on acid soil, but with a strong anthropogenic influence, which you can see e. g. at the many nitrophilous species.

b) List of species (examples)

Species
Genus
Family
Athyrium filix-femina (L.) Roth.
Athyrium
Woodsiaceae
Dryopteris filix-mas L. Schott.
Dryopteris
Dryopteridaceae
Glechoma hederacea L.
Glechoma
Lamiaceae
Lamium galeobdolon L. ssp. galeobdolon
Lamium
Lamiaceae
Stellaria holostea L.
Stellaria
Caryophllaceae
Pulmonaria officinalis agg. *)
Pulmonaria
Boraginaceae
Poa pratensis L.
Poa
Poaceae
Acer platanoides L.
Acer
Sapindaceae
Acer pseudoplatanus L.
Acer
Sapindaceae
Fagus sylcatica L.
Fagus
Fagaceae
Fraxinus excelsior L.
Fraxinus
Oleaceae
Urtica dioica L.**)
Urtica
Urticaceae
Alliaria petiolatea (M. Bieb) Cavara & Grande **)
Alliaria
Brassicaceae
*) only one fund, so possible escaped from a garden
**) typical indicators of nitrogen. Can be found everywhere

c) Gallery
Eller Forst

Eller Forst

Athyrium filix-femina (L.) Roth.
Stellaria holostea L.

Lamium galeobdolon L. ssp. galeobdolon

Poa pratensis L.

II. Wetland

a) Introducion
The Wetland is a small, protected area between the “Eller Forst” and the Lake “Unterbach”. It's a moist place, which is traversed by many silted streams. It's a typical wetland ecosystem, where you can find some interesting species, which had adapted to the high moisture of the soil.

b) List of species (example)

Species
Genus
Family
Alnus glutinosa (L.) Gaertn.
Alnus
Betulaceae
Iris pseudacorus L.
Iris
Iriaceae
Carex nigra (L.) Reichard
Carex
Cyperaceae
Carex elongata L.
Carex
Cyperaceae

These are all species of the so called alder-forest; a typical wet land forest.

c) Gallery
Alnus glutinosa (L.) Gaertn.


Iris pseudacorus L.


Carex elongata L.


Carex nigra (L.) Reichard
III. Lake Unterbach

a) Introducion
Lake Unterbach has four isles, which are protected habitats, so it's not allowed to visit them. So I can only show the vegetation at the shores of the lake. This is primarily the typical vegetation of moist shores and floodplains; mixed with many nitrogen-loving species, because of the high anthropogenic influence. It's not a unique or spectacular ecotope, but it's a good example for a wet fringe society

b) List of species (example)

Species
Genus
Family
Alnus glutinosa (L.) Gaertn.
Alnus
Betulaceae
Corylus avellana L.
Corylus
Betulaceae
Symphytum officinale L. ssp. officinale
Symphytum
Boraginaceae
Symphytum officinale ssp. bohemicum (F. W. Schmidt) Celak.
Symphytum
Boraginaceae
Ranunculus acris L.
Ranunculus
Ranunculaceae
Anthriscus sylvestris (L.) Hoffm.
Anthriscus
Apiaceae
Heracleum mantegazzianum Somm. & Lev.
Heracleum
Apiaceae
Lamium album L.
Lamium
Lamiaceae
Petasistes spec.
Petasites
Asteraceae
Veronica chamaedrys L.
Veronica
Plantaginaceae
Convallaria majalis L.
Convallaria
Asparagaeceae

Many of this plants are typical for wet bushes or fringe and also indicators of a high content of nitrogen into the soil.

c) Gallery

Lake Unterbach -  South shore

Lake Unterbach - North Shore

 Typical Shore Forest

Symphytum officinale L. ssp. officinale

Veronica chamaedrys L.

Anthriscus sylvestris (L.) Hoffm

Convallaria majalis L.

Corylus avellana L.

Ranunculus acris L.

Keine Kommentare:

Kommentar veröffentlichen