Summary
We compared the growth, phenology and leaf demography of partly defoliated, connected shoots with that of partly defoliated, severed shoots in four old-field perennials (Solidago canadensis, S. altissima, S. gigantea, Aster lanceolatus) with differing genet architectures (rhizome systems), in a common garden and in the field. Our main hypothesis was that defoliation would have fewer negative effects on shoot performance if shoots were connected than if their rhizomes were severed. Since degree of clonal integration is related to differences in genet architecture, our second hypothesis was that the effects of defoliation would be less pronounced in more integrated than in less integrated clones. Removing about 50% of the total leaf area from shoots had different effects depending on plant species, shoot density, and in particular whether rhizome connections between shoots were left intact or severed. In agreement with our prediction, experimentally isolated shoots in the field or in high density clumps in the garden suffered the most from defoliation, while shoots with intact connections or in low density clumps suffered the least. Our second prediction was neither confirmed nor falsified in the present study. Solidago altissima showed overcompensation in response to simulated herbivory in the common garden, i.e. defoliated shoots grew faster and were larger at harvest than their non-defoliated neighbours.
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Baldwin IT, Schultz JC (1983) Rapid changes in tree leaf chemistry induced by damage: evidence for communication between plants. Science 221:277–279
Capinera JL, Roltsch WJ (1980) Response of wheat seedlings to actual and simulated migratory grasshopper defoliation. Entomol Soc Am 73:258–261
Cohen J (1977) Statistical power analysis for the behavioral sciences. Academic Press, New York
Cottam DA, Whittaker JB, Malloch AJC (1986) The effects of chrysomelid beetle grazing and plant competition on the growth of Rumex obtusifolius. Oecologia (Berlin) 70:452–456
Fowler NL, Rausher MD (1985) Joint effects of competitors and herbivores on growth and reproduction in Aristolochia reticulata. Ecology 66:1580–1587
Hartnett DC, Abrahamson WG (1979) The effects of stem gall insects on life history patterns in Solidago canadensis. Ecology 60:910–917
Krischik VA, Denno RF (1983) Individual, population and geographic patterns in plant defense. In: Denno RF, McClure MS (eds) Variable plants and herbivores in natural and managed systems. Academic Press, New York
Lee TD, Bazzaz FA (1980) Effects of defoliation and competition on growth and reproduction in the annual plant Abutilon theophrasti. J Ecol 68:813–821
McNaughton SJ (1979) Grazing as an optimization process: grassungulate relationships in the Serengeti. Am Nat 113:691–703
McNaughton SJ (1984) Grazing lawns: animals in herds, plant form, and coevolution. Am Nat 124:863–886
Morrow PA, LaMarche VC (1978) Tree ring evidence for chronic insect suppression of productivity in subalpine Eucalyptus. Science 201:1244–1246
Myers JH, Williams KS (1984) Does tent caterpillar attack reduce the food quality of red alder foliage? Oecologia (Berlin) 62:74–79
Payne CD (1985) The Generalised Linear Interactive Modelling system release 3.77 manual. Numerical Algorithms Group, Oxford (England)
Pitelka LF, Ashmun JW (1985) Physiology and integration of ramets in clonal plants. In: Jackson JBC, Buss LW, Cook RE (eds) Population biology and evolution of clonal organisms. Yale University Press, New Haven
Rausher MD, Feeny P (1980) Herbivory, plant density and plant reproductive success: the effect of Battus philenor on Aristolochia reticulata. Ecology 61:905–917
Rhoades DF (1985) Offensive-defensive interactions between herbivores and plants: their relevance in herbivore population dynamics and ecological theory. Am Nat 125:205–238
Schmid B, Bazzaz FA (1987) Clonal integration and population structure in perennial plants: Effects of severing rhizome connections. Ecology 68:2016–2022
Schmid B, Puttick GM, Burgess KH, Bazzaz FA (1988) Correlations between genet architecture and some life history features in three species of Solidago. Oecologia 75:459–464
Sholes ODV (1981) Herbivory by species of Trirhabda (Coleoptera: Chrysomelidae) on Solidago altissima (Asteraceae): variation between years. Proc Entomol Soc Wash 83:274–282
Wellings PW, Dixon AFG (1987) Sycamore aphid numbers and population density. III. The role of aphid-induced changes in plant quality. J Anim Ecol 56:161–170
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Schmid, B., Puttick, G.M., Burgess, K.H. et al. Clonal integration and effects of simulated herbivory in old-field perennials. Oecologia 75, 465–471 (1988). https://doi.org/10.1007/BF00376953
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DOI: https://doi.org/10.1007/BF00376953