File:Dead tree river.jpg
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De tels troncs en descendant les fleuves à l'occasion d'une inondation par exemple peuvent naturellemment transporter des propagules de dizaines d'espèces de plantes et lichens, et des propagules de centaines d'espèces d'invertébrés et microorganismes sur des distances parfois importantes et jusqu'en mer. Noter les arbres qui sont déjà en train de pousser dans le bois en décomposition, profitant de l'humidité et de la lumière reflétée par l'eau. C'est ainsi aussi qu'on peut parfois trouver des arbres dont on ne comprend pas comment ils auraient pu germer ou s'enraciner sous l'eau.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 15:48, 15 January 2022 | 1,600 × 1,200 (3 MB) | Superbass (talk | contribs) | sharpness | |
09:33, 24 July 2005 | 1,600 × 1,200 (850 KB) | Superbass (talk | contribs) | Dead tree in a river, rainforest Vancouver Island, BC, Canada. Photography: --~~~~ {{GFDL} |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon DIGITAL IXUS |
Exposure time | 1/45 sec (0.022222222222222) |
F-number | f/3.5 |
Date and time of data generation | 15:12, 26 June 2002 |
Lens focal length | 9.28125 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 15:12, 26 June 2002 |
Y and C positioning | Centered |
Exif version | 2.1 |
Date and time of digitizing | 15:12, 26 June 2002 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 5.4918518066406 |
APEX aperture | 3.6147155761719 |
APEX exposure bias | 0 |
Maximum land aperture | 2.9708557128906 APEX (f/2.8) |
Subject distance | 3.178 meters |
Metering mode | Center weighted average |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 7,766.9902912621 |
Focal plane Y resolution | 7,741.935483871 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Software used | Topaz Labs |