Table 3. Comparison with other studies about methane flux from wetlands on the Qinghai-Tibetan Plateau reported with the static chamber method.

Location	Vegetation	Methane flux (mg CH4m-2 h-1 )	Study period		Reference
In Zoige County	K. tibetica	5.49±5.29	Jun. to Sept.2005 to 2007		This study
(33°56′N,102°52′E, a.s.l. 3430 m)	C. muliensis	17.78±17.50
	E. valleculosa	13.35±12.27
In the Huashixia Region	Carex meadow	0.41±0.79	Apr. to Sept.1997		[15]
(35°39′N, 98°48′E, a.s.l. 4300–4500 m)	Caltha scaposa	±0.28
	Hippuris vulgaris	1.46±2.30
	C. atrofusaskr	3.00±4.25
In Hongyuan County	C. muliensis	2.87 (0.51-8.20)	May to Sept.2001		[16]
(32°47′N, 102°32′E, a.s.l. 3470 m)	C. meyeriana	4.51 (0.36-10.04)
In the Lanhaizhi wetland	Potamogeton	1.38	Jul. to Sept.2002	[13]
(37°29′N, 101°12′E, a.s.l. 3250 m)	Hippuris	8.92
	Scirpus	4.57
	Carex	8.19
In Haibei	Carex meadow	0.80–1.41	Jun. to Sept.2003
(37°37′N, 101°19′E, a.s.l. 3280 m)	Carex and Hippuris	2.91–16.25
In Zoige County (littoral wetlands)	K. tibetica	-0.1–26.3	Jun. to Aug.2005 and 2006		[10]
(33°56′N,102°52′E, a.s.l. 3430 m)	C. muliensis	-0.1–21.8
	Non-vegetated	0.1–3.8
	H. vulgaris	0.2–22.9
	P. amphibium	0.4–40.4
	G. maxima	12–90