Growth of a deciduous tree seedling community in response to elevated CO2 and nutrient supply

Effect of competition on the responses of grasses and legumes to elevated atmospheric CO2 along a nitrogen gradient: differences between isolated plants, monocultures and multi‐species mixtures

“…Navas (1998) showed that the effect of CO # on species dominance and relative proportions in mixtures formed of four to more than 10 species was independent of duration of studies and productivity of habitats. This is confirmed by the re-analysis of recently published short-( 100 d, Berntson et al, 1998 ;Burcher et al, 1998) or longterm ( 300 d, Warwick et al, 1998) experiments. Short-and long-term experiments thus appear complementary to the understanding of the response of complex communities to elevated CO # : the former help understanding of the underlying processes, explaining why competition for resources changes the response of mixtures to CO # , while the latter are necessary to reliable prediction of effects of elevated CO # on real communities (Weiner, 1996).…”

Response of Forest Trees to Increased Atmospheric CO2

“…Past studies on Liriodendron tulipifera L. (Murray and Ceulemans, 1996), P. taeda (Tissue et al, 1997), and Alnus glutinosa L., Fraxinus angustifolia Vahl. and Q. robur L. (Bucher et al, 1997) found that elevated CO 2 significantly increased the number of branches (Saxe et al, 1998), which resulted in FIG. 3.…”

N2 fixation and cycling in Alnus glutinosa, Betula pendula and Fagus sylvatica woodland exposed to free air CO2 enrichment

“…phosphorous, iron and molybdenum) . Therefore, the growth of N 2 -fixing plants may show a different response to elevated CO 2 than non-N 2 -fixing plants, at least when N availability is limiting (Bucher et al 1998;Poorter and Navas 2003). For example, in the only FACE (free-air CO 2 enrichment) experiment to date to have included an N 2 -fixing tree species, Eguchi et al (2008) found that the photosynthetic response of alder saplings was different to that of birch saplings: photosynthesis was downregulated in birch under elevated CO 2 , while for alder, the downregulation of photosynthesis occurred in saplings growing in fertile soil but not in infertile soil.…”