File:Halimeda incrassata (calcareous green algae) (San Salvador Island, Bahamas) 4 (16052724442).jpg
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[edit]DescriptionHalimeda incrassata (calcareous green algae) (San Salvador Island, Bahamas) 4 (16052724442).jpg |
Halimeda incrassata (Ellis, 1768) on shallow, aragonitic sandy seafloor. Halimeda species are calcareous green algae consisting of upright stacks of greenish-colored, usually flattened segments. Each segment has an internal chip of calcium carbonate (aragonite, CaCO3). After the algae die and the soft parts decay away, the aragonitic chips become sand-sized seafloor sediments. A significant percentage of shallow seafloor and shoreline sediments in the Bahamas is from calcareous algae. The slender stalks are Syringodium filiforme manatee grass (= not algae). Classification: Chlorophyta, Caulerpales, Halimedaceae Locality: shallow seafloor just west of North Point Peninsula, southeastern Graham's Harbour, northeastern San Salvador Island, eastern Bahamas |
Date | |
Source | Halimeda incrassata (calcareous green algae) (San Salvador Island, Bahamas) 4 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/16052724442. It was reviewed on 3 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 May 2015
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/1,000 sec (0.001) |
F-number | f/4.9 |
ISO speed rating | 80 |
Date and time of data generation | 11:14, 22 June 2010 |
Lens focal length | 18.6 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 19:49, 18 December 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:14, 22 June 2010 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 9.96875 |
APEX aperture | 4.59375 |
APEX exposure bias | 0 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
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White balance | Manual white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 4,000 px |
Image height | 3,000 px |
Date metadata was last modified | 14:49, 18 December 2014 |
IIM version | 2 |