biostudies-literatureUnknown11(4)Silbiger NJCorals build reefs through accretion of calcium carbonate (CaCO3) skeletons, but net reef growth also depends on bioerosion by grazers and borers and on secondary calcification by crustose coralline algae and other calcifying invertebrates. However, traditional field methods for quantifying secondary accretion and bioerosion confound both processes, do not measure them on the same time-scale, or are restricted to 2D methods. In a prior study, we compared multiple environmental drivers of net erosion using pre- and post-deployment micro-computed tomography scans (μCT; calculated as the % change in volume of experimental CaCO3 blocks) and found a shift from net accretion to net erosion with increasing ocean acidity. Here, we present a novel μCT method and detail a procedure that aligns and dPloS onee0153058https://www.ebi.ac.uk/biostudies/studies/S-EPMC4830455biostudies-literatureA Novel μCT Analysis Reveals Different Responses of Bioerosion and Secondary Accretion to Environmental Variability.PMC4830455Donahue MJThomas FISilbiger NJGuadayol OfalseA Novel μCT Analysis Reveals Different Responses of Bioerosion and Secondary Accretion to Environmental Variability.Corals build reefs through accretion of calcium carbonate (CaCO3) skeletons, but net reef growth also depends on bioerosion by grazers and borers and on secondary calcification by crustose coralline algae and other calcifying invertebrates. However, traditional field methods for quantifying secondary accretion and bioerosion confound both processes, do not measure them on the same time-scale, or are restricted to 2D methods. In a prior study, we compared multiple environmental drivers of net erosion using pre- and post-deployment micro-computed tomography scans (μCT; calculated as the % change in volume of experimental CaCO3 blocks) and found a shift from net accretion to net erosion with increasing ocean acidity. Here, we present a novel μCT method and detail a procedure that aligns and d2016-01-01T00:00:00Z20162026-05-03T01:19:30.81Z2019-03-26T22:57:46ZS-EPMC48304552707400110.1371/journal.pone.0153058