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Náttúrufræðingurinn - 1993, Side 77

Náttúrufræðingurinn - 1993, Side 77
perate Australian rice ftelds following pasture reotation and continuous crop- ping. Journal of Applied Ecology 22. 875-884. Porsild, 1967. Lupinus arcticus Wats grown from seeds of Pleistocene age. Science 158. 113-114. Priestley, C.A. & M.A. Posthumus 1982. Extreme longevity of lotus seeds from Pulantien. Nature 299. 148-149. Probert, R. 1992. Seeds of success. Na- ture 359. 450. Raven, P.H. R.F. Evert & S.E. Eichhorn 1992. Biology of Plants, 5. útgáfa. Worth Publishers, Inc. 791 bls. Roberts, H.A. 1981. Seed banks in soils. Advances in Applied Biology 6. 1-55. Salisbury, E.J. 1942. The Reproductive Capacity of Plants. Bell & Sons, Lon- don. Silvertown, J.W. 1980. Seed size, lifespan and germination date as co-adapted fea- tures of plant life history. American Naturalist 118. 860-864. Silvertown, J.W. 1988. The demographic and evolutionary consequences of seed dormancy. I Plant Population Biology (ritstj. A.J. Davy, M.J. Hutchings & A.R. Watkinson), BES Symposium, 28. Blackwell Scientific Publications. Bls. 205-219. Stearns, S.D. 1976. Life-history tactics: a review of ideas. Quaterly Review of Bi- ology 51. 3-47. Sturla Friðriksson 1975. Surtsey. Evolu- tion of life on a volcanic island. Butterworths. London. Taylor, D.W. 1982. Reproductive biology of early seed plants. BioScience 32. 23- 28. Temple, S.A. 1977. Plant-animal mutual- ism: coevolution with the dodo leads to near extinction of plant. Science 197. 885-886. Thompson, K. & J.P. Grime 1983. A com- parative study of germination respons- es to diurnally flutctuating tempera- tures. Journal of Applied Ecology 20. 141-156. Tiffney, B.H. 1986. Evolution of seed dis- persal syndromes according to the fos- sil recores. í Seed Dispersal (ritstj. D.R. Murray). Academic Press. Bls. 273-305. Wareing, P.F. & l.D.J. Phillips 1970. The Control of Growth and Differentiation in Plants. Pergamon Press. 303 bls. Wells, T.C.E. 1981. Population ecology of terrestrial orchids. I The Biological Aspects of Rare Plant Conservation (ritstj. H. Synge). John Wiley & Sons Ltd. Bls. 281-295. Westoby, M. 1981. How diversified seed germination behavior is selected. Ameri- can Naturalist 118. 882-885. Whitmore, T.C. 1977. Palms of Malaya. Oxford University Press. 132 bls. Wing, S.L. & Tiffney, B.H. 1989. Angio- sperms and herbivorous tetrapods. í The Origins of Angiosperms and their Bio- logical Consequences (ritstj. E.M. Friis, W.G. Chaloner & P.R. Crane). Cam- bridge University Press. Bls. 203-224. Þóra Ellen Þórhallsdóttir 1993. Líffræði og þróun fræja. Náttúrufræðingurinn 63. 57-76. PÓSTFANG HÖFUNDAR Þóra Ellen Þórhallsdóttir Líffrœðistofnun Háskólans Grensásvegi 12 108 REYKJA VÍK 199
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