Potential Effects of the Loss of Native Grasses on Grassland Invertebrate Diversity in Southeastern Australia

Table 5

Results of pairwise regressions of richness (dependent variable) on groundcover/surface variables. Only significant regressions ( test) are shown, as indicated by sign and significance level.

Sampling period(s)	Groundcover/surface variable	Significant regression positive/negative
		Pitfalls	Sweep-netting	Both methods
February 2007	Native grass cover	+		+
	Clover cover			+
July 2007	Native grass cover			+
	Clover cover		+
	Introduced grass cover
	Litter cover
October 2007	Native grass cover		+
	Clover cover		+
February 2008	Native grass cover	+	+	+
2007; (3 surveys combined)	Clover cover		+
	Litter cover
February 2007 and 2008	Native grass cover			+
	Clover cover			+
	Litter cover

or .