File:Flore subaquatique d'une mare citerne en vallée de l'Esteron fin avril 2018 a 01.jpg
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[edit]DescriptionFlore subaquatique d'une mare citerne en vallée de l'Esteron fin avril 2018 a 01.jpg |
Français : Flore subaquatique (encore entièrement immergée) d'une sorte de citerne-mare à l’eau très claire et aux parois de pierre maçonnée.
Ce milieu est colonisé par 2 plantes (a priori semi-aquatiques) qui en font un bel équivalent d'aquarium de plusieurs mètres-cubes de volume (sans poissons visibles ce jour là ni amphibiens, mais avec quelques énormes larves de tipules sur le fond). Les grandes plantes semblent être l’Ache nodiflore (Apium nodiflorum) ou l'Ache rampante (Helosciadium repens), et une autre espèces, encore à identifier (feuilles d’un beau vert en larges rosettes sur fond de feuilles mortes en décomposition) est présente au premier plan. Cette eau cristalline alimente ensuite deux petites mares dont la première semble polluée et la seconde plus encore (apport d'engrais venant d’un petit champs très caillouteux qui les jouxte, et qui a été récemment labouré et peut être un peu trop enrichi en engrais à moins qu’il y ait eu un cadavre d’animal dans l’eau ?. Le 3ème de ces points d’eau était en avril 2018 nettement « dystrophe » (eau brune, malodorante et emplie d'une masse dense d'algues vertes filamenteuses) English: Subaquatic flora (still completely submerged) in a kind of cistern with very clear water and a wall of stone masonry. This habitat is here colonized by 2 plants (semi-aquatic ?) which make there a beautiful "aquarium-equivalent" of several cubic meters (without visible fish that day nor amphibians, but with some larvae of cranes on the background). The large plants appear to be Nodiflora ache ( Apium nodiflorum or creeping ache ( Helosciadium repens] and another species (leaves in large rosettes, on bottom of dead leaves in decomposition) is present in the foreground. This crystalline water then feeds two small pools, the first of which is polluted and the second more (fertilizer input from a small stony field that has been recently plowed and may be a little too fertilized) The third of these points water was in April 2018 "dystrophic" (brown water, smelly and filled with a dense mass of algae) filamentous green) |
Date | |
Source | Own work |
Author | Lamiot |
Camera location | 43° 51′ 15″ N, 6° 54′ 44.85″ E | View this and other nearby images on: OpenStreetMap | 43.854168; 6.912457 |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:56, 22 May 2018 | 4,608 × 3,456 (2.95 MB) | Lamiot (talk | contribs) | User created page with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | COOLPIX W300 |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/2.8 |
ISO speed rating | 160 |
Date and time of data generation | 13:31, 28 April 2018 |
Lens focal length | 4.3 mm |
Latitude | 43° 51′ 15.01″ N |
Longitude | 6° 54′ 44.84″ E |
Width | 4,608 px |
Height | 3,456 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 2018 Editor 16.0 (Macintosh) |
File change date and time | 12:01, 30 April 2018 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.31 |
Date and time of digitizing | 13:31, 28 April 2018 |
Meaning of each component |
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Image compression mode | 2 |
APEX shutter speed | 4.906891 |
APEX aperture | 2.970854 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 24 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS time (atomic clock) | 12:32 |
Satellites used for measurement | 11 |
Reference for direction of image | True direction |
Geodetic survey data used | WGS84 |
GPS date | 28 April 2018 |
GPS tag version | 0.0.3.2 |
Date metadata was last modified | 14:01, 30 April 2018 |
Unique ID of original document | 7842072420489E511657080F190757FF |
IIM version | 28,271 |