Analyze coral community composition and health in response to two bleaching events in the Gulf of Mannar, India.

This work supports the following study: Raj KD, Aeby GS, Mathews G, Williams GJ, Caldwell JM, Laju RL, Bharath MS, Kumar PD, Arasamuthu A, Asir NG, Wedding LM. Coral reef resilience differs among islands within the Gulf of Mannar, southeast India, following successive coral bleaching events. Coral Reefs. 2021 Aug;40(4):1029-44. https://link.springer.com/article/10.1007/s00338-021-02102-0

Data preparation

remotely_sensed_data_extraction.R : extract SST and Chl-a data for each island and bleaching year
concat_covariates.R : concatenate and format covariates for regression models
format_response_vars.R : format benthic composition data to calculate change in cover of different benthic groups

Analyses

GoM_anovas.R: conduct ANOVAs on overall benthic changes between 2005 and 2017
GoM_community_analyses.R : conduct community composition analyses (PERMANOVA and Indicator Species Analysis) and visualize data
GoM_regression_models.R : create beta regression models to identify environmental drivers of change in coral and algae cover
paired_t-tests.R : compare mean change in coral and algal cover due to two bleaching events