Effect of Removal of Woody Biomass after Clearcutting and Intercropping Switchgrass (Panicum virgatum) with Loblolly Pine (Pinus taeda) on Rodent Diversity and Populations

Table 4

Mean (±1SE) values of sex ratio (proportion males) from adult population abundance estimates calculated in Program MARK. Rodents were captured and released on site at the Lenoir 1 Sustainability Study Site, in Lenoir Co., NC, during 15 July–9 December, 2009 and 19 July–14 November, 2010. Statistical results are from comparisons using a 1-way ANOVA or Kruskal-Wallis test when parametric assumptions were not met. Kruskal-Wallis test statistics are reported as 𝜒² estimates. Within a year-species pairing, means with different letters are significantly different from one another (Mann-Whitney U pairwise comparisons with Bonferroni correction). Treatments: PB+ = Pine Biomass+; PB− = Pine Biomass−; P × SB+ = Pine × Switchgrass Biomass+; P × SB− = Pine × Switchgrass Biomass−; S = Switchgrass.

Year	Treatment	M. musculus	P. leucopus	S. hispidus
2009	PB+	0.72±0.09	0.65±0.04	0.49±0.12
	PB−	0.57±0.11	0.57±0.05	0.44±0.12
	P × SB+	0.65±0.08	0.60±0.04	0.58±0.09
	P × SB−	0.61±0.07	0.61±0.06	0.38±0.19
	S	0.52±0.08	0.62±0.04	0.74±0.09
		𝐹4,19=0.35, 𝑃=0.84	𝜒^2 = 0.27, df = 4, 𝑃=0.99	𝐹4,19=0.63, 𝑃=0.65
2010	PB+	0.44 ± 0.12^a	0.62±0.04	0.63±0.04
	PB−	0.81 ± 0.08^b	0.55±0.03	0.55±0.04
	P × SB+	0.40 ± 0.09^ab	0.79±0.04	0.43±0.04
	P × SB−	0.60 ± 0.06^ab	0.60±0.07	0.43±0.05
	S	0.64 ± 0.04^ab	0.42±0.13	0.61±0.05
		𝜒^2 = 11.03, df = 4, 𝑃=0.026	𝐹4,19=0.96, 𝑃=0.46	𝐹4,19=2.02, 𝑃=0.14