In a separate NODC Accession, text data files are given of the substrate types and coverages as derived objectively from photographic images using PhotoGrid, a software package which analyzes random points on images of coral reefs and substrate.
SITE LAT LONG ISLAND SITE CODE NAME MaHoN08m 21 00.923 156 38.343 8.00 Maui Honolua North MaHoS03m 21 00.831 156 38.380 3.00 Maui Honolua South MaKah03m 20 56.257 156 41.595 3.00 Maui Kahekili MaKah07m 20 56.274 156 41.623 7.00 Maui Kahekili MaKaP03m 20 36.089 156 26.214 3.00 Maui Kanehena Pt. MaKaP10m 20 36.070 156 26.280 10.00 Maui Kanehena Pt. MaKaB01m 20 37.049 156 26.241 1.00 Maui Kanehena Bay MaKaB03m 20 37.015 156 26.301 3.00 Maui Kanehena Bay MaMaa03m 20 47.378 156 30.607 3.00 Maui Maalaea MaMaa05m 20 47.332 156 30.596 5.00 Maui Maalaea MaMol08m 20 37.889 156 29.795 8.00 Maui Molokini MaMol13m 20 37.940 156 29.783 13.00 Maui Molokini MaOlo03m 20 48.505 156 36.693 3.00 Maui Olowalu MaOlo10m 20 48.363 156 36.733 10.00 Maui Olowalu MaPua03m 20 51.369 156 40.033 3.00 Maui Puamana MaPua10m 20 51.322 156 40.111 10.00 Maui Puamana
Resource Description: NODC Accession Number 0039627
1. Field Recording
Data are taken using a digital waterproof cameras. 20 digital images are taken on each of the 10 transects of each line, or 200 per survey.
The photographer follows the following procedure: While on the surface, the diver photographs the landmark "line-ups" used to locate the site. These serve to identify the tape if there is any question of proper labeling. Also, the images can be subsequently printed and laminated for use when relocating the site. In many cases the use of landmarks is faster and more convenient than using the GPS position to relocate the transect site. The diver then goes to the bottom and videotapes a full 360 degree panorama of the site as part of the permanent image record. The diver proceeds to the start of the first 10 m transect and records the transect number on the video through use of hand signals in front of the camera (number of fingers representing transect no.). The photographer then moves slowly (4 min per transect) along the 10 m transect while filming the bottom at a distance of 0.5 m. Initially a rod attached to the camera was used to insure proper distance from the bottom. This has been replaced with two small underwater lasers that cross at 0.5 m, allowing the photographer to hold the distance constant by keeping an overlap on the two red laser dots. Each of the 10 transects along the 100 m spine line is recorded in this manner.
Brown, E, E Cox, B Tissot, K Rodgers, and W Smith (1999). Evaluation of benthic sampling methods considered for the Coral Reef Assessment and Monitoring Program (CRAMP) in Hawaii. International Conference on Scientific Aspects of Coral Reef Assessment, Monitoring, and Restoration. April 14-16, Ft. Lauderdale, FL.
Connell, J H, T P Hughes, C C Wallace (1997). A 30-year study of coral abundance, recruitment, and disturbance at several scales in space and time. Ecol. Mono. 67(4): 461-488.
Friedlander, Alan and Parrish, James 1998. Habitat characteristics affecting fish assemblages on a Hawaiian coral reef. Journal of Experimental Marine Biology and Ecology 224: 1-30.
Green, R H and S R Smith (1997). Sample program design and environmental impact assessment on coral reef. Proc 8th International Coral Reef Symposium. 2: 1459-1464.
McCormick, Mark 1994. Comparison of field methods for measuring surface topography and their associations with a tropical reef fish assemblage. Marine Ecology Progress Series 112: 87-96.
Under each CDxx directory.... 06"site-name"/ site name such as Honolua (06 is the year) transect_site _name/ example, 06MaHoNO8m See table above to match site with directory. transect_site _name_depth.xxxx/ data directory where xxxx refers to: SI=selected Images to analyze with PhotoGrid Mosaic=All images photoed PANS=Four images taken at the beginning of the transect at 0, 180, 240, and 360 degrees. QUAD=Photoquads, 10 taken at each site to determine growth and mortality of individual colonies Unused=images not used in the analyses
transect_site_name_transect_number/ finally, data files sorted by transect number (from 1 to 10)
#FILENAMES: filename convention: site_code+tt+fff.tif
where site_code: (see #SAMPLING STATIONS: above in documentation) (2-digit year + 2-char island + 3-char site + 3-char depth) tt: transect number (2 digits) and fff: frame number (3 digits)