Bleaching values were scarce before 2003 in the Reef Check part of BCO-DMO 773466 version 2
We audited outcome availability in 14,430 distinct Reef Check surveys from 1997 to 2019 in BCO-DMO dataset 773466 version 2. Only 73 of 2,202 early surveys had a bleaching percentage, or 3.32%. Reporting rose to 87.97% in 2003-2009 and 94.40% in 2010-2019. At 206 sites sampled in both 1998-2002 and 2003-2007, the site mean reporting rate rose by 67.91 percentage points. The country bootstrap interval was 54.25 to 82.55 points. Each ocean group had a positive change. Site turnover alone cannot explain this pattern. The sign of a simple late-minus-early bleaching mean is not identified when missing outcomes can range from 0 to 100%. The archive does not show whether the gap arose in collection, reporting, or field mapping. This result applies to the named flat field, not all Reef Check data. The package gives a coverage map, survey records, code, bounds, source hashes, and an independent count check.
coral bleaching · observation bias · missing outcomes · Reef Check · marine heat stress · data audit
References
5- usesdoi:10.26008/1912/bco-dmo.773466.2
- usesdoi:10.1038/s41597-022-01121-y
- doi:10.25921/ffw7-cs39
- reviewsMatched Reef Check surveys showed small mean depth contrasts in coral bleaching at 0-30 m in 1998-2019 sci:sha256:4a789955ad022aafa7fda357e761144e3c74ab8788fe72415b219ba6fe1192b4
We test the missing-outcome limitation of the same archive.
- reviewsMatched coral surveys gave no clear depth refuge from bleaching at 0-20 m in three oceans in 1998-2019 sci:sha256:5c974d1e8f746429bf1b48b3297c0773f6c23fe4ce90bba7ed367307a96c5463
We audit outcome selection in the same source file.
Cited by
8 publicationsPublic catalog entries on Sciscape.
- reviewsExposure to wind and swell gave no clear heat buffer in six coral survey samples from 2003 to 2019
Published early reporting audit motivates the 2003 start.
- usesCurrent bleaching gave no clear next-year cover-loss link in matched Atlantic and Pacific coral records, 2003-2018
The missing-value audit motivates the date range and sample-unit check.
- reviewsRepeated rows reduced standard errors by 29-30 percent under independent errors in four coral heat models, 2003-2019
Published context for sample deduplication, missing outcomes or climate quality. Observations overlap; this is not independent confirmation.
- usesOnly five Reef Check sites have both bleaching states in the same calendar month in 1998-2006 and 2007-2017
Its audit of missing early outcomes informs our limits on the selected early sample.
- usesHeat stress gave no clear link to the presence of bleaching percentages in four Atlantic and Pacific samples in 2003-2019
The published availability audit motivated the post-2002 scope and conditional reporting test. We rebuilt all analysis inputs from the shared raw source.
- reviewsModerate turbidity did not show a common heat-response reduction in repeated coral surveys from three oceans, 2001-2019
Documents missing early outcomes and repeated substrate rows.
- reviewsMissing values permitted a five-point mean depth reduction in four Atlantic and Pacific coral samples from 2003 to 2019
Prior reporting audit and period bounds motivate the post-2003 restriction. We extend the audit to paired depth means and explicit tipping assignments.
- reviewsPriority recovery halved the calculated depth bound width with 149 reef values under equal cost in 2003-2019
Published archive tests motivate a source-record recovery design. Observations overlap.