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

Table 1

Mean (±1SE) values of species richness, Shannon Diversity Index, and Fisher’s α by treatment in 2009 and 2010. 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. Treatments: PB+ = Pine Biomass+; PB− = Pine Biomass−; P × SB+ = Pine × Switchgrass Biomass+; P × SB− = Pine × Switchgrass Biomass−; S = Switchgrass.

Year	Treatment	Species Richness	Shannon Diversity Index	Fisher’s α
2009	PB+	3.25±0.25	0.75±0.10	0.75±0.07
	PB−	2.75±0.25	0.62±0.19	0.63±0.08
	P × SB+	3.25±0.48	0.92±0.11	0.72±0.13
	P × SB−	3.25±0.25	0.99±0.09	0.72±0.09
	S	3.50±0.09	0.84±0.15	0.76±0.09
		𝜒^2 = 3.20, df = 4, 𝑃=0.53	𝐹4,19 = 1.20, 𝑃=0.34	𝐹4,19 = 0.31, 𝑃=0.87
2010	PB+	3.00±0.0	0.78±0.09	0.55±0.01
	PB−	3.50±0.29	0.91±0.07	0.66±0.07
	P × SB+	3.50±0.29	0.86±0.14	0.65±0.08
	P × SB−	3.75±0.25	0.76±0.15	0.69±0.07
	S	3.50±0.29	0.89±0.08	0.67±0.07
		𝜒^2 = 4.61, df = 4, 𝑃=0.33	𝐹4,19=0.40, 𝑃=0.80	𝜒^2 = 1.02, df = 4, 𝑃=0.91