Field Techniques for Coral Reef Scientists

Coral reef monitoring is only as good as the fieldwork behind it. Most monitoring programmes that fail do so at the design stage, not in the water. This programme is a field manual for scientists and survey teams who collect reef data for monitoring, impact assessment, restoration and research. It starts from the rule that every method choice begins with the question. It refreshes the biology the methods depend on: the coral–Symbiodiniaceae symbiosis, reef types and zones, the balance between calcification and bioerosion, and the functional groups that surveys record. It then works through survey design in practice. That covers status, trend, Control–Impact, BACI, beyond-BACI and gradient designs, the nested hierarchy from region to reef, site, stratum and transect, the difference between true replicates and pseudoreplicates, and a power calculation that shows how many transects are needed to detect real change. The in-water core covers scientific diving to recognised standards, with dive plans, indicative no-decompression limits, an emergency action plan and points specific to hot, shallow, busy Gulf waters. It then covers the full set of benthic methods: line and point intercept, belt, quadrat, photo-quadrat and video transects, with CPCe and CoralNet annotation and life-form codes. Fish and invertebrate work covers UVC belts, point counts, BRUVS and eDNA, size-estimation training, biomass from length–weight relationships, indicator invertebrates and the manta tow. Coral health covers bleaching categories, Degree Heating Weeks, the CoralWatch chart and disease identification. Reef structure is measured with chain rugosity and Structure-from-Motion photogrammetry, and the environment with temperature loggers, light, sediment traps and water sampling. The programme also covers recruitment tiles, juvenile corals and restoration monitoring, permits, CITES, chain of custody and biosecurity. Each method ends with a reviewer’s verdict on when to use it, and the worked problems use real field numbers. The final modules turn field sheets into evidence. They cover the data pipeline, metadata, QA/QC rules, observer calibration, choosing between mixed models, GLMs, PERMANOVA and survival analysis, and reporting to managers with traffic-light status and stated uncertainty. A three-day field practical schedule with team roles shows how the methods come together. Four real cases follow: Great Barrier Reef bleaching in 2016–2017, stony coral tissue loss disease in Florida, Arabian Gulf reefs at the thermal limit, and Seychelles recovery after 1998. An integrated teaching case on a marina beside a Gulf patch reef asks learners to interpret BACI results against triggers. Assessment is an online 20-question exam at a 70% pass mark, leading to a verifiable SKEDMIA certificate.