File:Stipagrostis prugens.jpg
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Captions
Captions
A good camel food
Summary
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| Description |
English: Stipagrostis prugens grows mainly in the sand, here in a riverbed at the foot of the Erg Tinya, west of the Oued Samene. The grass is adapted to dry conditions in that the leaves are rolled up and the stem ends in a hard, needle-sharp thorn. Biochemical processes allow the plant to only have to open the water-evaporating gaps half as much for photosynthesis as it would without these processes. This means it can survive with less water. The plant grows roots over a radius of more than 20 m. These are close to the surface and absorb moisture particularly well. The plant can survive for 4 to 5 years without rainfall.
Deutsch: Das Drin-Gras (Stipagrostis prugens) wächst vorwiegend im Sand, hier in einem Flussbett am Fusse des Erg Tinya, westlich des Oued Samene. Das Gras ist der Trockenheit angepasst, indem die Blätter eingerollt sind und der Stengel in einen harten, nadelspitzen Stachel mündet. Biochemische Prozesse erlauben es der Pflanze, dass sie für die Photosynthese die wasserverdunstenden Spalten nur halb soviel öffnen muss wie ohne diese Prozesse. Damit kommt sie mit weniger Wasser aus. Die Pflanze treibt Wurzeln im Umkreis von über 20 m aus . Diese sind nahe der Oberfläche und nehmen besonders gut Feuchtigkeit auf. Die Pflanze hält 4 bis 5 Jahre ohne Niederschlag aus.
Français : L'herbe Drin (Stipagrostis prugens) pousse principalement dans le sable, ici dans le lit d'une rivière au pied de l'Erg Tinya, à l'ouest de l'Oued Samene. L'herbe est adaptée à la sécheresse dans la mesure où les feuilles sont enroulées et la tige se termine par une épine dure et acérée. Les processus biochimiques permettent à la plante de n'ouvrir que deux fois moins les espaces d'évaporation de l'eau pour la photosynthèse que sans ces processus. Cela signifie qu'il utilise moins d'eau. La plante pousse des racines dans un rayon de plus de 20 m. Ceux-ci sont proches de la surface et absorbent particulièrement bien l’humidité. La plante peut supporter 4 à 5 ans sans pluie. |
| Date | |
| Source | Own work |
| Author | Heribertus2 |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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(Source: P. Tittrich: Biologie der Sahara, München 1983, S. 14 and https://fr.wikipedia.org/wiki/Stipagrostis_pungens)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:06, 6 September 2024 | | 3,199 × 2,124 (5.63 MB) | Heribertus2 (talk | contribs) | Uploaded own work with UploadWizard |
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