Summary
The responses of Polygonum pensylvanicum L., an early successional annual, and of Polygonum virginianum L., a late successional perennial, were examined along discontinuous gradients of soil moisture, light and nutrient availability. In the case of P. virginianum both individuals grown from seed and individuals grown from rhizomes were examined. The results show that variation in the response of individuals of a species of different age to environmental variation is as great as that found between the two congeneric species of different successional habitats. In general, individuals of the two species were more similar to one another in response to the resource gradients when both were started from seed, than were individuals of P. virginianum grown from seed and from rhizomes. Potential differences in stored reserves (starting capital) between rhizomes and seeds appeared to have little effect upon responses to resource availability. A number of plant characters were found to vary along the gradients in ways that were unique to the character, the gradient, and the age of the individual. These characters included aspects of leaf size, shape, and orientation, as well as whole plant architecture. Many if not all of these characters are likely to have significant effects upon the functioning of plants. The origin of this difference in response to the gradients of individuals of P. virginianum of differing age may be ontogenetic or may reflect differences in genetic composition created by recombination.
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References
Black JN (1960) The significance of petiole length, leaf area, and light interception in competition between strains of subterranean clover (Trifolium subterraneum L.) grown in swards. Aust J Agric Res 11:277–291
Dixon WJ (1981) BMDP Statistical Software. University of California Press, Berkeley
Garbutt K, Bazzaz FA, Levin DA (1985) Population and genotype niche width in clonal Phlox paniculata. Amer J Bot 72:640–648
Levins R (1968) Evolution in changing environments. Princeton University Press, Princeton
Parkhurst DF, Loucks OL (1972) Optimal leaf size in relation to environment. J Ecol 60:505–537
Parrish JAD, Bazzaz FA (1985) Ontogenetic niche shifts in oldfield annuals. Ecology 66:1296–1302
Schoener TW (1970) Non-synchronous spatial overlap of lizards in patchy habitats. Ecology 51:408–418
Schwaegerle KE (1983) A method for maintaining constant soil moisture availability for potted plants. Soil Sci Soc Amer J 47:608–610
Schwaegerle KE (1984) Relationships between genetic and ecological variables in nine populations of Phlox drummondii Hook. Ph D Thesis University of Illinois, Urbana
Taylor SE (1974) Optimal leaf form. In: Gates DM, Schmorl RB (eds) Perspecitives of biophysical ecology. Springer, Berlin Heidelberg New York, pp 73–83
Zangerl AR (1978) Energy exchange phenomena, physiological rates and leaf size variation. Oecologia (Berlin) 34:107–112
Zangerl AR, Bazzaz FA (1983a) Responses of an carly and a late successional species of Polygonum to variations in resource availability. Oecologia (Berlin) 56:397–404
Zangerl AR, Bazzaz FA (1983b) Plasticity and genotypic variation in photosynthetic behavior of an early and a late successional species of Polygonum. Oecologia (Berlin) 57:170–173
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Lee, H.s., Zangerl, A.R., Garbutt, K. et al. Within and between species variation in response to environmental gradients in Polygonum pensylvanicum and Polygonum virginianum . Oecologia 68, 606–610 (1986). https://doi.org/10.1007/BF00378779
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DOI: https://doi.org/10.1007/BF00378779