Floral Resources and Nesting Requirements of the Ground-Nesting Social Bee, Lasioglossum malachurum (Hymenoptera: Halictidae), in a Mediterranean Semiagricultural Landscape

Table 3

Superficial characteristics of the nesting sites of L. malachurum sampled in 2008. Measures were taken at 3 plots of $1\hspace{0.17em}m\times 1\hspace{0.17em}m$ at each site. Except for soil hardness, which was taken 3 times at each plot (9 measures per site), all the other variables have $n=3$, so that statistical comparisons were not possible.

Sample code	Soil hardness (Kg/cm^2)	Vegetation cover (%)	Soil surface slope (degrees)	Number of stones with diameter $>$5 cm	Stone cover (%)
A	$7.9\pm 2.1$	$2.7\pm 2.5$	$13.3\pm 20$	$3.3\pm 0.6$	$13.3\pm 7.6$
B	$8.6\pm 1.2$	$0$	0	$0$	$0$
C	$10.7\pm 0.3$	$11.7\pm 16.1$	0	$2.7\pm 3.8$	$10.0\pm 0.0$
D	$10.9\pm 0.2$	$63.3\pm 5.8$	0	0	$1.7\pm 2.9$
E	$6.5\pm 1.8$	$1.7\pm 2.9$	0	0	2
Statistics	Kruskall-Wallis test: $\chi$^2$=29.12\text{,}$$P<.001$	—	—	—	—