Main Boardpolo ralph lauren outlet Benthic and substrate cov


15.07.2014, 05:10 - klpsnqfr359 - Rank 2 - 19 Beiträge
Benthic and substrate cover data derived from photo,polo ralph
Underwater georeferenced photo transect surveys were conducted on October 3 7,nike air max, 2012 at various sections of the reef and lagoon at Lizard Island,p90x 3, Great Barrier Reef. For this survey a snorkeler swam while taking photos of the benthos at a set distance from the benthos using a standard digital camera and towing a GPS in a surface float which logged the track every five seconds. A Canon G12 digital camera was placed in a Canon underwater housing and photos were taken at 1 m height above the benthos. Horizontal distance between photos was estimated by three fin kicks of the survey snorkeler,louboutin, which corresponded to a surface distance of approximately 2.0 4.0 m. The GPS was placed in a dry bag and logged the position at the surface while being towed by the photographer (Roelfsema,lancel, 2009). A total of 1,the north face,265 benthic photos were taken.
Benthic or substrate cover data was derived from each photo by randomly placing 24 points over each image using the Coral Point Count for Microsoft Excel program (Kohler and Gill,oakley, 2006). Each point was then assigned to 1 of 79 cover types,air max 90, which represented the benthic feature beneath it. Benthic cover composition summary of each photo scores was generated automatically using CPCE program. The resulting benthic cover data of each photo was linked to GPS coordinates,rayban, saved as an ArcMap point shapefile,nike tn, and projected to Universal Transverse Mercator WGS84 Zone 55 South.

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