Table 1.

Characteristics of Cors Fochno and Whixall Moss ombrotrophic raised bogs. (a) average site characteristics for 2006 to 2011 (where possible), (b) site characteristics for 2011 during which fieldwork was undertaken, (c) abiotic characteristics of the ten survey plots at each site throughout the 2011 growth season of Drosera rotundifolia

(a)
Site	Location	Mean annual precipitation (mm yr.−1)a	Mean temperature January / July (°C)a	Mean growing season length (d)b	Growing season average temperature (°C)b	N deposition (g m−2 yr.−1)a
Cors Fochno	52°30′09 N, 04°00′57 W	1381	3.5/14.7	320	11.6	0.62
Whixall Moss	52°92′16 N, 02°76′45 W	719	4.0/13.7	296	11.0	1.37
(b)
Site	Annual precipitation (mm yr.−1)c		Temperature January / July (°C)c		Growing season length (d)c,d	Growing season average temperature (°C)c,d
Cors Fochno	1008		3.7/15.0		324	12.1
Whixall Moss	565		2.5/14.2		301	11.5
(c)
		NH4-N (μg l−1)	NO3-N (μg l−1)	NO2-N (μg l−1)	DIN (μg l−1)	pH (pH units)	Light (%)
Cors Fochno	Mean	0	137	711	353	3.4	61
	SE	0	22	5	106	0.05	3.6
Whixall Moss	Mean	468	256	782	1505	3.8	55
	SE	184	67	17	234	0.15	1.7
t-test resultse	t	2.539	1.668	3.926	4.481	2.329	−1.499
	df	9	11	10	13	11	18
	P	0.032	0.124	0.003	0.001	0.040	0.151

NH₄-N, pore water ammonium content; NO₃-N, pore water nitrate content; NO₂-N, pore water nitrite content; pH, pore water pH; light, proportion of ambient light available to survey Drosera rotundifolia plants

^aData are mean values for 2006–2011 inclusive

^bGrowing season is the number of days with mean temperature ≥ 5 °C. Data are mean values for 2011–2012 inclusive (earlier years unavailable)

^cData values for 2011 only. Based on observed meteorological data from automatic weather stations at each site; data accessed from Countryside Council for Wales (Cors Fochno) and Natural England (Whixall Moss)

^dGrowing season is the number of days with mean temperature ≥ 5 °C

^eComparing differences between sites