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![IMGP3208.jpg - [it]Esemplari di pinus lambertiana parzialmente bruciati, sullo sfondo una sequoia. Fino a qualche anno fa, si reprimevano gli incendi per proteggere le sequoie, ma negli anni '60 si è scoperto che così facendo si minacciava la loro sopravvivenza. Periodici incendi naturali liberano il sottobosco da piante infiammabili prima che crescano troppo, piante che impediscono la crescita delle giovani sequoie. Il suolo caldo aiuta la germinazione, l'aria calda favorisce la produzione di pigne. Così si è passati dal controllo degli incendi agli incendi controllati per ristabilire le condizioni iniziali[en]Partially burnt Sugar Pines in Mariposa Grove, a Giant Sequoia in the foreground. Until the early 1960's, natural fire was considered dangerous for sequoias, then it was discovered it is an essential factor for their conservation. The fire cleans up the soil from shrubs and small trees, very flammable and blocking the growth of young sequoias. A hot soil helps germination, hot air helps cones production. So fire control let place to controlled fires to get back to initial conditions.](../IMGP3208.jpg) |
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| it | en | IMGP3208 | Partially burnt Sugar Pines in Mariposa Grove, a Giant Sequoia in the foreground. Until the early 1960's, natural fire was considered dangerous for sequoias, then it was discovered it is an essential factor for their conservation. The fire cleans up the soil from shrubs and small trees, very flammable and blocking the growth of young sequoias. A hot soil helps germination, hot air helps cones production. So fire control let place to controlled fires to get back to initial conditions. | |
| Camera: PENTAX *ist DS | Date: 27/05/05 17.00 | ISO: 400 | Exp. bias: -1 EV | Exp. Time: 1/60s | Aperture: 4.0 | Focal Length: 50,0mm (=77mm) | Flash: No | ||
| Total images: 34 | Last update: 13/12/10 9.37 | Help | ||