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] 124%0% 155%0%    
Water Hyacinth, Common [Eichhornia crassipes]         144%0%
Water Lily [Nymphaea marliac] 339.7%12.4%        
Wedelia chinensis [Herb, Perennial] 245.5%6.7%        
Wedelia trilobata [Creeping Daisy] 274%1.4%        
Weed, Annual, C4 [Eragrostis orcuttiana] 1-44%0%        
Wheat, Durum [Triticum durum] 259%25.5%        
Wheat, Common [Triticum aestivum] 11168.2%8.5%     479.8%32.1%
Wheatgrass, Western [Agropyron smithii] 2-4.5%6%        
Wheatgrass, Western [Pascopyrum smithii] 661.2%14.9%        
White Cattail [Typha x glauca] 10%0%        
White Spruce [Picea glauca] 1197%0%        
White Teak [Gmelina arborea] 1114%0%        
Whiteflower Kurrajong [Brachychiton populneum] 175%0% 1150%0%    
Whortleberry [Vaccinium myrtillus] 247%9.2%        
Wild Mustard [Sinapis arvensis] 220%3.5%     112%0%
Wild Spikenard [Hyptis suaveolens] 188%0%        
Willow [Salix jiangsuensis] 549.4%8.9%        
Woodland Sage [Salvia nemorosa] 2277.5%136.1%        

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