File:Penicillus dumetosus (shaving brush algae) (San Salvador Island, Bahamas) 1 (15860530290).jpg
Original file (2,400 × 3,000 pixels, file size: 7.12 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionPenicillus dumetosus (shaving brush algae) (San Salvador Island, Bahamas) 1 (15860530290).jpg |
Penicillus dumetosus (Lamouroux, 1816) - shaving brush algae (a.k.a. bristle ball brush algae) on shallow, aragonitic sandy seafloor. (photo taken by Mark Peter) Penicillus is a calcareous green alga - the "brush" contains densely packed bristles having tiny particles of aragonite (CaCO3 - calcium carbonate). After the alga dies and the soft parts decay away, the aragonitic portions become clay- & silt-sized seafloor sediments. A significant percentage of shallow seafloor and shoreline sediments in the Bahamas is from calcareous algae. Many carbonate petrologists suggest that ancient fine-grained limestones (micritic limestones; micrites) are diagenetically altered deposits of calcareous green algae similar to or analogous to Penicillus. The wide blades are Thalassia testudinum turtle grass. The dark green, segmented alga in the center-right background is Halimeda, another type of calcareous green algae. Classification: Chlorophyta, Caulerpales, Udoteaceae Locality: South Pigeon Creek estuary, southeastern San Salvador Island, eastern Bahamas |
Date | |
Source | Penicillus dumetosus (shaving brush algae) (San Salvador Island, Bahamas) 1 |
Author | James St. John |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15860530290. 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
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 21:13, 3 May 2015 | 2,400 × 3,000 (7.12 MB) | Natuur12 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on species.wikimedia.org
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.
Image title |
|
---|---|
Camera manufacturer | OLYMPUS IMAGING CORP. |
Camera model | u1030SW,S1030SW |
Exposure time | 1/400 sec (0.0025) |
F-number | f/5 |
ISO speed rating | 80 |
Date and time of data generation | 12:35, 26 March 2009 |
Lens focal length | 5 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 00:53, 18 December 2014 |
Y and C positioning | Co-sited |
Exposure Program | Creative program (biased toward depth of field) |
Exif version | 2.21 |
Date and time of digitizing | 12:35, 26 March 2009 |
Meaning of each component |
|
APEX exposure bias | 0 |
Maximum land aperture | 3.61 APEX (f/3.49) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Supported Flashpix version | 1 |
Image width | 2,400 px |
Image height | 3,000 px |
Date metadata was last modified | 19:53, 17 December 2014 |
IIM version | 2 |