<div><p><strong>Sampling and Analytical Methodology:</strong></p>
<p>One person swims around the reef and visually estimates the relative cover of different substrates. In early years there was some confusion about <em>Stegastes</em> turf and grazed turf (Surgeonfish fish grazed turf). By 2012, grazed turf is now considered bare space. Divers ignored taxa that covered less than 1 percent of the benthos in 2003 and 2004. Starting in 2005, they looked at cover of 2% and above. In 2004, additional lettered reefs were monitored for benthic cover. These lettered reefs were experimentally added to the site for another experiment. After 2004 they were not monitored again. For a limited number of reefs between 2003-2005, the investigators completed a limited number of point contacts to verify their estimates.</p>
<p><strong>Materials: </strong>dver, slate</p></div>
Percent Visual Cover on Long Term Reefs
<div><p>Coral, algae, and invertebrates were observed, and their percent cover on each of the patch reefs estimated. These data were collected from 2003-2005, 2007, 2009, 2012, and 2014. These surveys were conducted at each of 192 reefs. Beginning in 2012, reefs 129-144 and added reefs 193-198 were manipulated for a project studying the effects of vermetid removals; information pertaining to this manipulation can be found in the project “Spatial patterns of coral-vermetid interactions: short-term effects and long-term consequences”. All data collected on reefs 129-144 and 193-198 beginning in 2012 can also be found under that project. Descriptions of each reef are located in the “Long Term Reef Physical Characteristics” dataset. Estimating benthic composition of each reef provides serial data over time and space. These data are meant to provide contextual information for vermetid and <em>Thalassoma</em> dynamics.</p>
<p><strong>Location:</strong> Moorea, French Polynesia (17.48 degrees S, 149.82 degrees W)</p></div>
LTR - Percent Visual Cover
<div><p><strong>Data Processing: </strong><br /><strong>Calculations:</strong> To get “TOTALPOINTS”, sum across the columns. Use that sum to estimate percent cover each substrate by dividing the number in the cell by the total points.</p>
<p><strong>NA</strong>- Not applicable (never recorded) to this data set<br /><strong>NR</strong>- Not recorded at certain times throughout the data set<br /><strong>tr</strong> - “Trivial” amount</p>
<p><strong>BCO-DMO Processing Notes</strong><br />
- Generated from original file "LTR_PercentVisualCover.csv" contributed by Rebecca Atkins<br />
- Parameter names edited to conform to BCO-DMO naming convention found at <a href="http://usjgofs.whoi.edu/naming-guidelines.html" target="_blank">Choosing Parameter Name</a><br />
- Any blank rows removed</p></div>
645061
LTR - Percent Visual Cover
2016-05-10T14:37:13-04:00
2016-05-10T14:37:13-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:645061
LTR - Percent Visual Cover
false
Osenberg, C., Shima, J., Frazer, T. (2016) LTR - Percent Visual Cover. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 23 May 2016) Version Date 2016-05-23 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/645061 [access date]
false
23 May 2016
false
2016-05-23
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