1997) Indices of plant N availability in an alpine grassland under elevated CO2. Plant and Soil 13, 61–66.
1990) Effect of nodulation, nitrogen fixation and CO2 enrichment on the physiology, growth and dry mass allocation of seedlings of Alnus rubra Bong. The New Phytologist 13, 55–66. & (
1996) Symbiotic N2-fixation in alpine tundra: ecosystem input and variation in fixation rates among communities. Oecologia 13, 345–350. , , (
1997) Effects of elevated CO2 on gas exchange characteristics of alpine grassland. Acta Oecologica 13, 177–182.
1997) Growth response of Trifolium repens L. & Lolium perenne L. as monocultures and bi-species mixture to free air CO2 enrichment and management. Global Change Biology 13, 149–160.
, , , , , , , , (
1988) Contribution of nitrogen fixation to nitrogen nutrition in an alpine sedge community (Caricetum curvulae). Oecologia 13, 298–302.
1986) Field nodulation and acetylene reduction activity of high-altitude legumes in the western United States. Arctic and Alpine Research 13, 171–179.
1985) Nitrogen fixation in high arctic tundra at Sarcpa Lake, Northwest Territories. Canadian Journal of Botany 13, 974–979. , , (
1997) The responses of alpine grassland to four seasons of CO2 enrichment: a synthesis. Acta Oecologica 13, 165–175.
, , , , (
1996) Response of alpine vegetation to elevated CO2. Carbon Dioxide and Terrestrial Ecosystems (eds H. A. Mooney & G. W. Koch), pp. 177–196. Academic Press, San Diego., , , (
1999) A field study of the effects of elevated CO2 on plant biomass and community structure in a calcareous grassland. Oecologia 13, 39–49.
, , , (
1997) Effects of elevated CO2 on model calcareous grasslands: community, species, and genotype level responses. Global Change Biology 13, 389–397. & (
1996) Differences between legumes and nonlegumes of permanent grassland in their responses to free-air carbon dioxide enrichment: its effect on competition in a multispecies mixture. Carbon Dioxide, Populations, and Communities (eds Ch. Körner & F. A. Bazzaz), pp.287–300. Academic Press, San Diego., , , , , , (
1994) Effects of elevated CO2 and simulated seasonal changes in temperature on the species composition and growth rates of pasture turves. Annals of Botany 13, 53–59.
, , , , (
1996) Responses of soil microbiota of a late successional alpine grassland to long-term CO2 enrichment. Plant and Soil 13, 219–229.
1987) Nodulation and nitrogenase activity in nitrogen-fixing woody plants stimulated by CO2 enrichment of the atmosphere. Physiologia Plantarum 13, 77–82.
1986) Effect of atmospheric CO2 enrichment on perennial ryegrass (Lolium perenne) and white clover (Trifolium repens L.) competing in managed model ecosystems. I. Phytomass production. Acta Oecologica 13, 26–35. & (
1976) The effect of CO2 enrichment on root nodule development and symbiotic N2 reduction in Pisum sativum L. American Journal of Botany 13, 356–362.
, , , (
1996) Critical Loads of Nitrogen and their Exceedances. Environmental Series no. 275. Federal Office of Environment, Forests and Landscape, Bern, Switzerland. (
1996) Growth responses in an alpine grassland to elevated CO2. Oecologia 13, 43–52.
1996) The effects of elevated CO2 on symbiotic N2 fixation: a link between the carbon and nitrogen cycles in grassland ecosystems. Plant and Soil 13, 321–332. & (
1998) Effects of elevated CO2 and phosphorus addition on productivity and community composition of intact monoliths from calcareous grassland. Oecologia 13, 50–56. , , (
1991) Nitrogen dynamics and growth of seedlings of an N-fixing tree (Gliricidia sepium (Jacq. Walp.)) exposed to elevated atmospheric carbon dioxide. Oecologia 13, 415–412.
, , , , (
1997) Nitrogenase activity and N2 fixation are stimulated by elevated CO2 in a tropical N2-fixing tree. Oecologia 13, 28–33.
, , (
1989) Biological invasion by Myrica faya in Hawai’i: plant demography, nitrogen fixation, ecosystem effects. Ecological Monographs 13, 247–265.
1995) Leaf gas exchange and nitrogen dynamics o f N2-fixing, field-grown Alnus glutinosa under elevated atmospheric CO2. Global Change Biology 13, 55–61.
1986) Measurement of biological dinitrogen fixation in the field. Field Measurement of Dinitrogen Fixation and Denitrification (eds R. D. Hauck & R. W. Weaver), pp. 1–10. Soil Science Society of America, Madison, WI. (
1984) Dinitrogen fixation in alpine tundra, Niwot Ridge, Front Range, Colorado, U.S.A. Arctic and Alpine Research 13, 1–10.
1996) Stimuation of symbiotic N2 fixation in Trifolium repens L. under elevated atmospheric pCO2 in a grassland ecosystem. Plant Physiology 13, 575–583. , , , , , , , , (