Carte topographique Helvellyn

Nom : Carte topographique Helvellyn, altitude, relief.

Lieu : Helvellyn, Patterdale, Westmorland and Furness, England, CA12 4TP, United Kingdom (54.52694 -3.01765 54.52704 -3.01755)

Altitude moyenne : 680 m

Altitude minimum : 277 m

Altitude maximum : 943 m

Red Tarn, a classic corrie tarn, is a high-elevation tarn with low nutrient levels and poor in the number of species it supports. Characteristic vegetation zones include a water-starwort (Callitriche) in shallower areas and the alga Nitella flexilis in deeper water and around the inlet. Other species include a pondweed (Potamogeton) which grows in 2–3 m (7–10 ft) of water and the rush Juncus bulbosus. Brown trout and schelly, a species of whitefish, are found in the tarn.

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