CO2 Science

Plant Photosynthesis (Net CO2 Exchange Rate) Responses
to Atmospheric CO2 Enrichment
W

	300 ppm			600 ppm			900 ppm
Plant Name	Number of Studies	Arithmetic Mean	Standard Error	Number of Studies	Arithmetic Mean	Standard Error	Number of Studies	Arithmetic Mean	Standard Error
Walnut, Black [Juglans nigra]	1	24%	0%	1	55%	0%
Water Hyacinth, Common [Eichhornia crassipes]							1	44%	0%
Water Lily [Nymphaea marliac]	3	39.7%	12.4%
Wedelia chinensis [Herb, Perennial]	2	45.5%	6.7%
Wedelia trilobata [Creeping Daisy]	2	74%	1.4%
Weed, Annual, C4 [Eragrostis orcuttiana]	1	-44%	0%
Wheat, Durum [Triticum durum]	2	59%	25.5%
Wheat, Common [Triticum aestivum]	111	68.2%	8.5%				4	79.8%	32.1%
Wheatgrass, Western [Agropyron smithii]	2	-4.5%	6%
Wheatgrass, Western [Pascopyrum smithii]	6	61.2%	14.9%
White Cattail [Typha x glauca]	1	0%	0%
White Spruce [Picea glauca]	1	197%	0%
White Teak [Gmelina arborea]	1	114%	0%
Whiteflower Kurrajong [Brachychiton populneum]	1	75%	0%	1	150%	0%
Whortleberry [Vaccinium myrtillus]	2	47%	9.2%
Wild Spikenard [Hyptis suaveolens]	1	88%	0%
Willow [Salix jiangsuensis]	5	49.4%	8.9%
Woodland Sage [Salvia nemorosa]	2	277.5%	136.1%