Modeling Aquatic Macroinvertebrate Richness Using Landscape Attributes

Table 3

Accuracy of macroinvertebrate family richness predictions and landscape attributes.

	Paired -test		Number of matches
Macroinvertebrate family richness	1.532	0.134
Stream gradient		0.012	27
Riparian forest cover		0.005	28
Water quality (total nitrogen)		<0.0001	31
Water quality (total phosphorus)		0.027	26
Water quality (suspended sediment)		<0.0001	39

Paired -test = value, = value, and number of matches = matches using the sign test. Sign test was used for attributes where only value is present. Results were termed significant for .