Table 3. Mean Shannon–Wiener diversity indices for invertebrates in under-vine treatments at three sampling dates, ranked for 2008 results.

Treatments with means of 0 have been omitted from the analysis of variance, as denoted by placing these means in brackets. The variability of such treatments is zero, so a LS Effect (5%) has been calculated to allow comparison between bracketted and unbracketted means (for full species names see Table 1).

Endemic planta	Invertebrate diversity (Shannon-Weiner H′)
	Aug 2008b	Jan 2009	Mar 2009
G. sessiliflorum	1.11	1.17	1.31
H. chathamica	0.95	0.24	0.77
A. bellidioides	0.71	1.10	0.57
A. inermis ‘purpurea’	0.45	0.55	1.10
L. dioica	0.35	1.09	0.50
M. axillaris	0.28	1.30	1.31
L. squalida	0.26	0.98	0.52
L. angulata	0.17	0.94	1.01
A. inermis	0.15	0.92	0.79
D. australe	0.07	–	–
M. ephedrioides	0.07	–	–
R. hookeri	0.07	0.71	0.24
R. subsericea	0.07	–	–
S. uniflorus	(0)	(0)	0.07
Ryegrass inter-row	(0)	0.19	0.43
Bare earth	(0)	0.07	(0)
LSD(5%)c	0.36	0.49	0.45
LSEffect(5%)d	0.25	0.34	0.32

Notes.

^aAll plant species in this work apart from M. axillaris are endemic to New Zealand.

^bThe table has been sorted into the order of decreasing Shannon–Wiener H′ mean values in August 2008.

^cLSD, Least Significant Difference. Unbracketted means which differ by more than the LSD (5%) are significantly different at P < 0.05.

^dLSEffect, Least Significant Effect. If a bracketted mean and an unbracketted mean differ by more than the LS Effect(5%), then the two means are significantly different at P < 0.05.

–, means plant species was not sampled.