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Quantifying endolithic bioerosion rates on remote coral reefs in the Central Indian Ocean by Jake E. Lloyd Newman; Chris T. Perry; Ines D. Lange is a Environmental Science article available to read on EtoBox.

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## Abstract Bioerosion of calcium carbonate is a fundamental process that impacts net coral reef accretion. Besides large grazers, endolithic organisms play a major role in carbonate removal. Here we provide the first rate data for both macro- and microendolithic bioerosion in the remote Chagos Archipelago, Indian Ocean. Based on analysis of experimental blocks using computer tomography, we show similar macrobioerosion rates at 5 m (0.086 ± 0.026 kg m^−2^ yr^−1^) compared to at 10 m depth (0.066 ± 0.016 kg m^−2^ yr^−1^) after three years of exposure, with a succession from worm to sponge bioeroders over time. Microbioerosion rates analysed with scanning electron microscopy were 2–5 × higher than macrobioerosion rates at 5 m (0.187 ± 0.028 kg m^−2^ yr^−1^) and 10 m depth (0.313 ± 0.049 kg m^−2^ yr^−1^), but the microborer community was dominated by cyanobacteria in all samples. Total endolithic erosion was small compared to external erosion by parrotfishes, which increased over time, but did not show significant differences between 5 m (0.74 ± 0.11) and 10 m depth (1.12 ± 0.16 kg m^−2^ yr^−1^) after three years of exposure. These erosion rates are indicative of the oligotrophic and

Who reads Quantifying endolithic bioerosion rates on remote coral reefs in the Central Indian Ocean?

Author

Jake E. Lloyd Newman; Chris T. Perry; Ines D. Lange

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)