Scleractinian corals are colonial animals with a range of life history strategies that make up diverse species assemblages that contribute to coral reef growth. We tagged and tracked approximately 30 colonies from each of 11 species for six years (2009-2015) in order to measure their vital rates and competitive interactions on the reef crest at Trimodal Reef, Lizard Island, Australia. Pairs of species were chosen from five growth forms (massive [Goniastrea pectinata and G. retiformis], digitate [Acropora humilis and A. cf. digitifera], corymbose [A. millepora and A. nasuta], tabular [A. cytherea and A. hyacinthus] and arborescent [A. robusta and A. intermedia]) where one species of the pair was locally rare and the other abundant. (An extra corymbose species, A. spathulata was included when it became apparent that A. millepora was too rare to work with on the reef crest, making the 11 species in total.) The tagged colonies were visited each year in the weeks prior to mass spawning. During visits, photographs were taken by two or more observers from directly above and on the horizontal plane with a scale plate to track planar area. Dead or missing colonies were recorded and new colonies tagged in order to maintain approximately 30 colonies per species throughout the six years of the study. In addition to tracking tagged corals, 30 fragments were collected from neighboring untagged colonies of each species for counting numbers of eggs per polyp (fecundity); and fragments of untagged colonies were brought into the laboratory where spawned eggs were collected for size and energy measurements. We also conducted surveys at the study site to generate size structure data for each species in several of the years. Each tagged colony photograph was digitized by at least two people. Therefore, we could examine sources of error in planar area for both photographers and outliners. Competitive interactions were recorded for a subset of species by measuring the margins of tagged colony outlines interacting with neighboring corals. The study was abruptly ended by Tropical Cyclone Nathan that killed all but nine of the over 300 tagged colonies in early 2015. Nonetheless, these data will be of use to other researchers interested in coral demography and coexistence, functional ecology, and parametrizing population, community and ecosystem models.

{"references": ["\u00c1lvarez\u2010Noriega, M., A. H. Baird, M. Dornelas, J. S. Madin, and S. R. Connolly. 2018. Negligible effect of competition on coral colony growth. Ecology 99:1347\u20131356.", "\u00c1lvarez-Noriega, M., A. H. Baird, M. Dornelas, J. S. Madin, V. R. Cumbo, and S. R. Connolly. 2016. Fecundity and the demographic strategies of coral morphologies. Ecology 97:3485\u20133493.", "\u00c1lvarez-Noriega, M., J. S. Madin, A. H. Baird, M. Dornelas, and S. R. Connolly. 2020. Disturbance-induced changes in size-structure promote coral biodiversity. Preprint, https://doi.org/10.1101/2020.05.21.094797", "Baird, A., M. \u00c1lvarez-Noriega, V. Cumbo, S. Connolly, M. Dornelas, and J. Madin. 2018. Effects of tropical storms on the demography of reef corals. Marine Ecology Progress Series 606:29\u201338.", "Dornelas, M., J. S. Madin, A. H. Baird, and S. R. Connolly. 2017. Allometric growth in reef-building corals. Proceedings of the Royal Society B: Biological Sciences 284:20170053.", "Madin, J. S., A. H. Baird, M. L. Baskett, S. R. Connolly, and M. A. Dornelas. 2020. Partitioning colony size variation into growth and partial mortality. Biology Letters 16:20190727.", "Madin, J. S., A. H. Baird, M. Dornelas, and S. R. Connolly. 2014. Mechanical vulnerability explains size-dependent mortality of reef corals. Ecology Letters 17:1008\u20131015.", "McWilliam, M., M. Dornelas, M. Alvarez-Noriega, A. Baird, S. R. Connolly, and J. Madin. 2022. Net effects of life-history traits explain persistent differences in abundance among similar species. Ecology. e3863"]}

Sources of funding: The compilation of this data set was supported by Australian Research Council (ARC) Discovery-Projects (DP0987892 to JSM; DP0880544 to SRC), ARC Future Fellowships (FT110100609 to JSM; FT0990652 to AHB), the ARC Centre of Excellence for Coral Reef Studies (CE0561432; CE140100020) and the John Templeton Foundation (60501 to MD and JSM). Further funding support was received by a National Science Foundation that supported MJM and the compilation of this data set (1948946 to JSM).