Close-range underwater photogrammetry for coral reef ecology: a systematic literature review

125 publications on coral reef photogrammetry were systematically reviewed to assess: 1) its global trends and use; 2) how benthic community data is extracted from imagery; 3) the range of metrics derived and their ecological applications; and 4) key limitations of the approach.55 metrics derived from photogrammetry, grouped in 10 categories, have been used to inform ecological studies on benthic assemblage, habitat structural complexity, and ecosystem condition and trajectory