File:Callune broutée coloneHelfaut2001.jpg
Size of this preview: 800 × 535 pixels. Other resolutions: 320 × 214 pixels | 640 × 428 pixels | 866 × 579 pixels.
Original file (866 × 579 pixels, file size: 321 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
Français : Photo prise sur le Plateau d'helfaut près de la fr:Colonne d'Helfaut (près de fr:Saint-Omer (Pas-de-Calais), dans le Pas de Calais, en France.
Sur une zone sableuse, naturellement oligotrophe et acide, décapée, les bruyères callune et tetralix ont formé un tapis ras, entretenu par les lapins. Sur les zones décapés par le surpiétinement, le sable reste relativement maintenu en place fixé par un biofilm d'algues et bactéries ou microlichens et substance mucilagineuses produites par les organismes qui y vivent (dont micro champignons). On y trouvait autrefois des lichens au sol, mais mais qui ont fortement régressé (et presque disparu) en raison de la pollution de l'air dans cette zone (agriculture intensive et 4 papeteries et une grande verrerie cristallerie à proximité).English: pioneer species (bacteria + algae) on sand, and Erica cinerea (Helfaut, Pas de Calais, north of france) |
| Date | |
| Source | Own work |
| Author | Lamiot |
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
This file is licensed under the Creative Commons Attribution 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
You may select the license of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:23, 8 December 2007 | | 866 × 579 (321 KB) | Lamiot | {{Information |Description= {{fr}} Photo prise sur le Plateau d'helfaut près de la Colonne d'Helfaut (près de Saint Omer, dans le Pas de Calais, en France. Sur une zone sableuse, naturellement oligotrophe et acide, décapée, les bruyères call |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on cs.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on war.wikipedia.org
