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Table 2 Description of the categories of exposure, outcome and type of study defined by the review team

From: Evidence on the impacts of chemicals arising from human activity on tropical reef-building corals; a systematic map

Categories Clarifications
Exposure:
 Undefined pollutants Studies assessing the impact of human activities on corals without reference to a chemical
 Nutrient  
 Eutrophication Studies referring to eutrophication without information on the nutrients involved
 Metal
 Pesticide Includes herbicides, fungicides, insecticides, and biocides
 Hydrocarbon Includes crude oil, petroleum, gasoline, diesel, and polycyclic aromatic hydrocarbons
 Dispersant Chemicals used to disperse oil
 Detergent  
 Microplastic  
 Nanoparticle  
 Pharmaceutical  
 UV filter  
 Other Chemicals that could not be classified elsewhere
Outcome:
 Bioaccumulation Chemical concentration in the coral
 BioaccumulationF Chemical concentration in the coral when the chemical concentration in the environment is also known (allowing the calculation of a bioaccumulation factor)
 Bleaching  
 Calcification Calcification rate, skeletal structure, skeletal density
 Coral diversity Taxa richness, diversity index, taxa composition
 Cover  
 Disease  
 Distribution Spatial distribution, occurrence
 Genetic Gene expression, population genetic structure
 Growth Skeletal growth, tissue growth, linear extension rate
 Microbiome Outcomes related to the density and characteristics of Symbiodiniaceae and other coral-associated microorganisms
 Mortality  
 Physiology Content in carbohydrate, lipid, protein or other biomolecule, enzyme activity, histology, metabolism, mucus production, photopigment concentration, photosynthesis efficiency and other parameters, respiration rates
 Recruitment Settlement success, number of recruits
 Reproduction Fertilisation success, embryo development, state of reproductive structure, planulation
 Other Outcomes that could not be classified elsewhere (e.g. colour change, coral condition, polyp retraction, larval motility)
Type of study:
 Laboratory experiment Experimental studies (i.e. the exposure was controlled by the researchers) conducted in laboratory conditions
 Field experiment Experimental studies (i.e. the exposure was controlled by the researchers) conducted in the field
 Field survey Observational field studies