Ziska Lewis H, Drake Bert G, Chamberlain Sarah
Smithsonian Environmental Research Center, P.O. Box 28, 21037, Edgewater, MD, USA.
Oecologia. 1990 Jul;83(4):469-472. doi: 10.1007/BF00317196.
Mono-specific communities of the C sedge, Scirpus olneyi and the C grass, Spartina patens, were exposed to normal ambient or elevated CO, (ca. 680 μl l) throughout the 1987 and 1988 growing seasons in open-top field chambers located on a tidal marsh. Single stems of C plants grown in ambient or elevated CO showed an increased photosynthetic rate when tested at elevated CO for both seasons. This increase in photosynthetic response in the C species was maintained throughout the 1987 and 1988 growing season. The stimulation of photosynthesis with elevated CO appeared to increase as temperature increased and decreased as photosynthetic photon flux (PPF) increased. Analysis of the photosynthetic response of the C species during the 1988 season indicated that significant differences in light-saturated photosynthetic rate between ambient and elevated CO conditions continued until October. In contrast to the C sedge, the C grass showed no significant photosynthetic increase to elevated CO except at the beginning of the 1988 season.
1987年和1988年生长季期间，在潮汐沼泽地的开放式田间试验箱中，将C莎草（奥尔内氏荸荠，Scirpus olneyi）和C禾本科植物（互花米草，Spartina patens）的单特异性群落暴露于正常环境CO₂或高浓度CO₂（约680 μl/l）中。在两个生长季中，当在高浓度CO₂条件下进行测试时，生长于环境CO₂或高浓度CO₂条件下的C植物单茎的光合速率均有所增加。在1987年和1988年整个生长季中，C物种的这种光合反应增加一直保持。随着温度升高，高浓度CO₂对光合作用的刺激作用似乎增强；随着光合光子通量（PPF）增加，刺激作用减弱。对1988年生长季C物种光合反应的分析表明，直到10月，环境CO₂和高浓度CO₂条件下光饱和光合速率仍存在显著差异。与C莎草不同，除了1988年生长季开始时，C禾本科植物对高浓度CO₂未表现出显著的光合增加。
