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Table 1 The suite of fixed explanatory variables relating to environmental measurements and bryozoan colony characters that were incorporated in mixed model statistical analyses

From: Persistence, impacts and environmental drivers of covert infections in invertebrate hosts

Category

Explanatory variable

Water chemistry

Dissolved oxygen as O2 (mg/l)

Chemical Oxygen Demand (COD) (mg/l)

pH

Alkalinity to pH 4.5 as CaCO3 (mg/l)

Hardness, total as CaCO3 (mg/l)

Ammonia un-ionised as N (mg/l)

Ammonia nitrogen as N (mg/l)

Nitrate as N (mg/l)

Nitrite as N (mg/l)

Nitrogen, total oxidised as N (mg/l)

Orthophosphate, reactive as P (mg/l)

Magnesium (mg/l)

Calcium (mg/l)

Chloride (mg/l)

Cadmium (mg/l)

Productivity

Bacterial Oxygen Demand (BOD) (mg/l)

Chlorophyll a, acetone extract (μg/l)

Total confirmed coliforms, membrane filtration (CFU/0.1 l)

Total presumptive coliforms, membrane filtration (CFU/0.1 l)

Other environmental factors

Water temperature (°C)

Water flow (m/s)

Turbidity (FTU)

Conductivity at 25 °C (μS/cm)

Colony characters

Zooid number (colony size)

Statoblast presence