Four indicators based macroinvertebrate families found in a stream reach, as predicted by models similar to adapted from those of Walsh and Webb (2013, 2016)1
1Walsh, C.J. and Webb, J.A. (2013).
Predicting stream macroinvertebrate assemblage composition
as a function of land use, physiography and climate: a guide
for strategic planning for river and water management in the
Melbourne Water management region. Melbourne Waterway
Protection and Restoration Science-Practice Partnership Report 13-1.
Department of Resource Management and Geography, The University
of Melbourne. October 2013.
Walsh, C.J. & Webb, J.A. (2016) Interactive effects of urban stormwater
drainage, land clearance, and flow regime on stream macroinvertebrate
assemblages across a large metropolitan region. Freshwater Science, 35, 324-339.
LUMaR is an index described by Walsh (manuscript in review)
combining the Observed:Expected approach of RIVPACS/AUSRIVAS indices and the sensitivity grades of indices
such as SIGNAL. SIGNAL and SIGNAL2 are the average sensitivity grade of
the families present at a site, with families sensitive to disturbance
given high grades (a maximum of 10) and tolerant families given
lower grades (a minimum of 1) (SIGNAL, Chessman
(1995 Aust J Ecol 20: 122. SIGNAL2, Chessman 2003 Mar Freshw Res 95–103).
Number of sensitive families is to at least one human impact (Walsh in review:
see also Sensitivity in the table above): all but all but 6 families were
classed as sensitive, as they showed negative association with one or
both of attenuated imperviousness or attenuated forest cover.