Ten amphibian species and four reptile species have been identified. Among the amphibians, two species are interesting in terms of regional heritage: the European Tree Frog and the Great Crested Newt. We should also mention the Agile Frog, a species typical of alluvial forests, and the Sand Lizard.

http://rn-rohrschollen.strasbourg.eu/uploads/images/grenouille-agile-C-HELLIO.jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/hyla-VACHER-(BUFO).jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/Triton-crete-BARBERY.jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/lezard_agile_male-BAUMGART.jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/natrix01-VACHER (BUFO).jpg http://rn-rohrschollen.strasbourg.eu/uploads/images/suivi_tritons-P-BUCHERT.JPG

Herpetological population of the nature reserve on Rohrschollen Island

The species catalogued in 2003 by BUFO are taken up in the following table, which also stipulates, where applicable, the vulnerability status in Alsace (Red List or Orange List) and the statutory status (national protection – Habitat Directive).

Common name

Scientific name

Regional vulnerability status

National statutory status

Habitat Directive

Anura (frogs and toads)

Common Frog

Rana temporaria

 

Article 5

Annex V

Agile Frog

Rana dalmatina

To be monitored

Full protection

Annex IV

European Tree Frog

Hyla arborea

Rare

Full protection

Annex IV

Common Toad

Bufo bufo

 

Article 3

 

Edible Frog

Pelophylax kl. esculentus

 

Article 5

Annex V

Pool Frog

Pelophylax lessonae

Heritage

Full protection

Annex IV

Urodela (newts)

Great Crested Newt

Triturus cristatus

Rare

Full protection

Annexes II & IV

Alpine Newt

Ichthyosaura alpestris

Heritage

Article 3

 

Smooth Newt

Lissotriton vulgaris

To be monitored

Article 3

 

Reptiles

Sand Lizard

Lacerta agilis

To be monitored

Full protection

Annex IV

Slow Worm

Anguis fragilis

 

Article 3

 

Grass Snake

Natrix natrix

In decline

Full protection

 

 

 

Orange List Alsace

 

Red List Alsace

 

Two additional species have since been discovered:

  • Marsh Frog (Pelophylax ridibundus): Article 3 of the national regulations and Annex V of the Habitats Directive.
  • Wall Lizard (Podarcis muralis): Full protection nationally, Annex IV of the Habitats Directive and Heritage on the Orange List Alsace.

Establishment of a national monitoring protocol, the Pop-amphibians programme

A national monitoring scheme is applied to National Nature Reserves, Pop-amphibian monitoring. Through its "Abundance" section, it allows us to monitor the spatial (from one pond to another) and temporal (from one year to another) developments of populations of the most important heritage species for the site across the ten ponds on the reserve. The species monitored are:

  • Agile Frog (Rana dalmatina): diurnal counts of egg-laying (1 lay = 1 pair) from the banks of the pond, three successive passes at each pond in the space of one week during March.
  • European Tree Frog (Hyla arborea): nocturnal listening posts from the banks of the pond in order to count the number of calling male individuals reproducing in the pond, three successive passes at each pond in the space of one week during May.
  • Great Crested Newt (Triturus cristatus): nocturnal surveys using a dip net intended to count the number of male individuals in mating dress (reproducing individuals) in each pond: crest, specific colouring… Three successive passes are made at each pond in the space of one week during May.

For each of these survey phases, parameters such as the duration of listening time, the duration of diurnal/nocturnal surveying in the pond, the number of times the dip net is immersed, are timed/noted… The practical details of the survey must be identical year on year in order to allow analyses and comparisons between the results thus obtained.

Photographs:
Agile frog © Camille HELLIO
European Tree Frog © Jean-Pierre VACHER (BUFO)
Great Crested Newt © Jean BARBERY (BUFO)
Male Sand Lizard © Gérard BAUMGART
Grass Snake © Jean-Pierre VACHER (BUFO)