H_sal: Maximum H' as a linear function of salinity

In ambiR: Calculate AZTI’s Marine Biotic Index

Maximum H' as a linear function of salinity

Description

Used by DKI2(), adjusting the Shannon diversity index ⁠H'⁠ to account for decreasing species diversity with decreasing salinity.

Usage

H_sal(psal, intercept = 2.117, slope = 0.086)

Arguments

psal	numeric salinity
intercept	numeric, default 2.117
slope	numeric default 0.086

Details

AMBI_sal() and H_sal() are named, respectively, AMBI_min and H_max in the DKI documentation (Carstensen et al., 2014). They are renamed in ambiR to reflect the fact that they are functions of salinity and not minimum or maximum values from data being used.

Value

a numeric value H_max

Examples

H_sal(20.1)

ambiR documentation built on Dec. 20, 2025, 1:06 a.m.