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Accessory costs of seed production

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Abstract

Accessory costs of reproduction are those that are necessary to mature a seed, but that do not involve the direct cost of provisioning the seed itself. This study aims to quantify accessory costs in a range of species, and test whether they decrease as a proportion of total reproductive expenditure with increasing seed mass, as might be expected if economies of scale came into play at larger seed sizes. We also test whether accessory costs varied with growth form, pollination mode, and dispersal mode, with the expectation that biotic pollination and dispersal modes should incur greater costs. Reproductive allocation (dry biomass) over one season, was calculated for 14 diclinous angiosperm species. Accessory costs averaged 73% of total reproductive allocation, with the majority spent on packaging and dispersal. Total accessory costs, packaging and dispersal costs, and costs incurred prior to pollination were proportional to direct costs of reproduction in major axis regressions. However, larger seeded species incurred significantly greater costs associated with aborted seeds and fruits, and matured a smaller proportion of ovules. This is consistent with larger seeded species being more selective of the ovules/embryos matured than small-seeded species. Total accessory costs, and proportion of ovules aborted, were also significantly greater for biotically dispersed species, but only due to an association with larger seed masses. Costs associated with abortions were lower for biotically pollinated species, due to a general trend of more ovules per ovary, resulting in greater cost sharing. This study demonstrates that expenditure on items other than seeds accounts for the majority of reproductive allocation in flowering plants. Yet, far more literature exists on seed mass variation than on investment in accessory structures. We found a proportional relationship between accessory costs and seed mass that warrants further investigation within the context of selection on margin returns on investment.

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References

  • Analytical Software (1998) Statistix for Windows, version 1.2. Analytical Software, Tallahassee, FL

  • Antos JA, Allen GA (1994) Biomass allocation among reproductive structures in the dioecious shrub Oemleria cerasiformis—a functional interpretation. J Ecol 82:21–29

    Article  Google Scholar 

  • Ashman T-L (1992) Indirect costs of seed production within and between seasons in a gynodioecious species. Oecologia 92:266–272

    Article  Google Scholar 

  • Ashman T-L (1994) Reproductive allocation in hermaphrodite and female plants of Sidalcea oregana ssp. spicata (Malvaceae) using four currencies. Am J Bot 81:433–438

    Article  Google Scholar 

  • Baker HG (1972) Seed weight in relation to environmental conditions in California. Ecology 53:997–1010

    Article  Google Scholar 

  • Bawa KS, Webb CJ (1984) Flower, fruit and seed abortion in tropical forest trees: implications for the evolution of paternal and maternal reproductive patterns. Am J Bot 71:736–751

    Article  Google Scholar 

  • Bookman SS (1983) Costs and benefits of flower abscission and fruit abortion in Asclepias speciosa. Ecology 64:264–273

    Article  Google Scholar 

  • Charnov EL, Downhower JF (1995) A trade-off-invariant life-history rule for optimal offspring size. Nature 376:418–419

    Article  PubMed  CAS  Google Scholar 

  • Cipollini ML, Stiles EW (1991) Costs of reproduction in Nyssa sylvatica: sexual dimorphism in reproductive frequency amnd nutrient flux. Oecologia 86:585–593

    Article  Google Scholar 

  • Gill AM, Brooker MIH, Moore PHR (1992) Seed weights and numbers as a function of fruit size and subgenus in some Eucalyptus species from south-western Australia. Aust J Bot 40:103–111

    Article  Google Scholar 

  • Greene DF, Johnson EA (1994) Estimating the mean annual seed production of trees. Ecology 75:642–647

    Article  Google Scholar 

  • Grime JP, Hodgson JG, Hunt R (1988) Comparative plant ecology. A functional approach to common British species. Unwin-Hyman, London

    Google Scholar 

  • Haig D, Westoby M (1991) Seed size, pollination costs and angiosperm success. Evol Ecol 5:231–247

    Article  Google Scholar 

  • Hemborg ÅM, Karlsson PS (1999) Sexual differences in biomass and nutrient allocation of first-year Silene dioica plants. Oecologia 118:453–460

    Article  Google Scholar 

  • Herrera CM (1987) Vertebrate-dispersed plants of the Iberian Peninsula: a study of fruit characteristics. Ecol Mon 57:305–331

    Article  Google Scholar 

  • Howe HF, Smallwood J (1982) Ecology of seed dispersal. Annu Rev Ecol Syst 13:201–228

    Article  Google Scholar 

  • Hughes L, Dunlop M, French K, Leishman MR, Rice B, Rodgerson L, Westoby M (1994) Predicting dispersal spectra: a minimal set of hypotheses based on plant attributes. J Ecol 82:933–950

    Google Scholar 

  • Janzen DH (1971) Seed predation by animals. Annu Rev Ecol Syst 2:465–492

    Article  Google Scholar 

  • Jurado E, Westoby M, Nelson D (1991) Diaspore weight, dispersal, growth form and perenniality of Central Australian plants. J Ecol 79:811–830

    Article  Google Scholar 

  • Lee WG, Grubb PJ, Wilson JB (1991) Patterns of resource allocation in fleshy fruits of nine European tall-shrub species. Oikos 61:307–315

    Google Scholar 

  • Legendre P (2001) Model II regression—user’s guide. Département de sciences biologiques, Université de Montréal, Montréal

  • Leishman MR, Wright IJ, Moles AT, Westoby M (2000) The evolutionary ecology of seed size. In: Fenner M (ed) Seeds, 2nd edn. CABI Publishing, Wallingford, UK, pp 31–57

    Google Scholar 

  • Lloyd DG (1980) Sexual strategies in plants. I. An hypothesis of serial adjustment of maternal investment during one reproductive session. New Phytol 86:69–79

    Article  Google Scholar 

  • Lloyd DG (1984) Gender allocations in outcrossing cosexual plants. In: Dirzo R, Sarukhán J (eds) Perspectives in plant population ecology. Sinauer Associates Inc., Sunderland, MA, Ch 15

  • Lord J, Egan J, Clifford T, Jurado E, Leishman M, Williams D, Westoby M (1997) Larger seeds in tropical floras: consistent patterns independent of growth form and dispersal mode. J Biogeogr 24:205–211

    Article  Google Scholar 

  • Mazer SJ (1989) Ecological, taxonomic, and life history correlates of seed mass among Indiana Dune angiosperms. Ecol Mon 59:153–175

    Article  Google Scholar 

  • Mehlman DW (1993) Seed size and seed packaging in Baptista lanceolata (Fabaceae). Am J Bot 80:735–742

    Article  Google Scholar 

  • Obeso JR (2002) The costs of reproduction in plants. New Phytol 155:321–348

    Article  Google Scholar 

  • Pate JS, True KC, Kuo J (1991) Partitioning dry matter and mineral nutrients during a reproductive cycle of the mistletoe Amyema linophyllum (Fenzl) Tieghem parasitizing Casuarina obesa Miq. J Exp Bot 42:427–439

    CAS  Google Scholar 

  • Reekie EG, Bazzaz FA (1992) Cost of reproduction as reduced growth in genotypes of two congeneric species with contrasting life histories. Oecologia 90:21–26

    Article  Google Scholar 

  • Sans FX, Masalles RM (1993) Life-history variation in the annual arable weed Diplotaxis erucoides (Cruciferae). Can J Bot 72:10–19

    Google Scholar 

  • Shipley B, Dion J (1992) The allometry of seed production in herbaceous angiosperms. Am Nat 139:467–483

    Article  Google Scholar 

  • Smith CC, Fretwell SD (1974) The optimal balance between size and number of offspring. Am Nat 108:499–506

    Article  Google Scholar 

  • Stephenson AG (1981) Flower and fruit abortion: proximate causes and ultimate functions. Annu Rev Ecol Syst 12:253–279

    Article  Google Scholar 

  • Sutherland S (1986) Patterns of fruit-set: what controls fruit–flower ratios in plants? Evolution 40:117–128

    Article  Google Scholar 

  • Telenius A, Torstensson P (1991) Seed wings in relation to seed size in the genus Spergularia. Oikos 61:216–222

    Google Scholar 

  • Thompson K, Stewart AJA (1981) The measurement and meaning of reproductive effort in plants. Am Nat 117:205–211

    Article  Google Scholar 

  • Venables DL (1996) Packaging and provisioning in plant reproduction. Philos Trans R Soc Lond (B) 351:1319–1329

    Google Scholar 

  • Westoby M, Leishman MR, Lord JM (1996) Comparative ecology of seed size and dispersal. Philos Trans R Soc Lond (B) 351:1309–1318

    Google Scholar 

  • Westoby M, Falster DS, Moles AT, Vesk PA, Wright IJ (2002) Plant ecological strategies: some leading dimensions of variation between species. Annu Rev Ecol Syst 33:125–59

    Article  Google Scholar 

  • Wiens D (1984) Ovule survivorship, brood size, life history, breeding systems, and reproductive success in plants. Oecologia 64:47–53

    Article  Google Scholar 

  • Willson MF (1993) Dispersal modes, seed shadows, and colonization patterns. Vegetatio 108:261–280

    Google Scholar 

  • Willson MF, Michaels HJ, Bertin RI, Benner B, Rice S, Lee TD, Hartgerink AP (1990) Intraspecific variation in seed packaging. Am Midl Nat 123:179–185

    Article  Google Scholar 

  • Witkowski ETF, Lamont BB (1996) Disproportionate allocation of mineral nutrients and carbon between vegetative and reproductive structures in Banksia hookeriana. Oecologia 105:38–42

    Google Scholar 

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Acknowledgments

We acknowledge the support of the Australian Research Council, the New Zealand Foundation for Research Science and Technology, and the Australian National Parks and Wildlife Service, as well as valuable comments from two anonymous referees.

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Authors and Affiliations

  1. Department of Botany, University of Otago, Dunedin, New Zealand

    Janice M. Lord

  2. Department of Biological Sciences, Macquarie University, Macquarie, NSW, 2109, Australia

    Mark Westoby

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  1. Janice M. Lord
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  2. Mark Westoby
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Correspondence to Janice M. Lord.

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Communicated by Christian Koerner.

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Lord, J.M., Westoby, M. Accessory costs of seed production. Oecologia 150, 310–317 (2006). https://doi.org/10.1007/s00442-006-0523-z

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  • DOI: https://doi.org/10.1007/s00442-006-0523-z

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