When bigger is not better: Intraspecific competition for pollination increases with population size in invasive milkweeds

Oecologia

Volumn 171, Issue 4, 2013, Pages 883-891

  Ward, Megan ^a   Johnson, Steven D ^b   Zalucki, Myron P ^a  

^a UNIVERSITY OF QUEENSLAND   (Australia)

^b UNIVERSITY OF KWAZULU NATAL   (South Africa)

Author keywords

Allee effect; Competition; Invasive plants; Pollen limitation; Population size

Indexed keywords

ALLEE EFFECT; FECUNDITY; FIELD SURVEY; FRUIT PRODUCTION; HERB; INTRASPECIFIC COMPETITION; INVASIVE SPECIES; PLANT-POLLINATOR INTERACTION; POLLEN LIMITATION; POPULATION SIZE; REPRODUCTIVE SUCCESS; SEED PRODUCTION;

AUSTRALIA;

ASCLEPIAS; ASCLEPIAS CURASSAVICA; GOMPHOCARPUS FRUTICOSUS;

EID: 84875676397     PISSN: 00298549     EISSN: None     Source Type: Journal    
DOI: 10.1007/s00442-012-2463-0     Document Type: Article

References (56)

1. Ågren J (1996) Population size, pollinator limitation, and seed set in the self-incompatible herb Lythrum salicaria. Ecology 77: 1779-1790.
2. Aizen MA (1997) Influence of local floral density and sex ratio on pollen receipt and seed output: empirical and experimental results in dichogamous Alstroemeria aurea (Alstroemeriaceae). Oecologia 111: 404-412.
3. Alexandersson R, Ågren J (1996) Population size, pollinator visitation, and fruit production in the deceptive orchid Calypso bulbosa. Oecologia 107: 533-540.
4. Ashman TL, Knight TM, Steets JA, Amarasekare P, Burd M, Campbell DR, Dudash MR, Johnston MO, Mazer SJ, Mitchell RJ, Morgan MT, Wilson WG (2004) Pollen limitation of plant reproduction: ecological and evolutionary causes and consequences. Ecology 85: 2408-2421.
5. Bierzychudek P (1981) Pollinator limitation of plant reproductive effort. Am Nat 117: 838-840.
6. Burd M (1994) Bateman's principle and plant reproduction: the role of pollen limitation in fruit and seed set. Bot Rev 60: 83-139.
7. Campbell LG, Husband BC (2007) Small populations are mate-poor but pollinator-rich in a rare, self-incompatible plant, Hymenoxys herbacea (Asteraceae). New Phytol 174: 915-925.
8. Cappuccino N (2004) Allee effect in an invasive alien plant, pale swallow-wort Vincetoxicum rossicum (Asclepiadaceae). Oikos 106: 3-8.
9. Coombs G, Peter CI, Johnson SD (2009) A test for Allee effects in the self-incompatible wasp-pollinated milkweed Gomphocarpus physocarpus. Austral Ecol 34: 688-697.
10. Cunningham SA (2000) Depressed pollination in habitat fragments causes low fruit set. Proc R Soc Lond B 267: 1149-1152.
11. Davis HG, Taylor CM, Civille JC, Strong DR (2004a) An Allee effect at the front of a plant invasion: Spartina in a Pacific estuary. J Ecol 92: 321-327.
12. Davis HG, Taylor CM, Lambrinos JG, Strong DR (2004b) Pollen limitation causes an Allee effect in a wind-pollinated invasive grass (Spartina alterniflora). Proc Natl Acad Sci USA 101: 13804-13807.
13. Ehrlén J, Eriksson O (1995) Pollen limitation and population growth in a herbaceous perennial legume. Ecology 76: 652-656.
14. Ellstrand NC, Elam DR (1993) Population genetic consequences of small population size: implications for plant conservation. Annu Rev Ecol Syst 24: 217-242.
15. Endress ME, Bruyns PV (2000) A revised classification of the Apocynaceae s. l. Bot Rev 66: 1-56.
16. Forster PI (1994) Diurnal insects associated with the flowers of Gomphocarpus physocarpus E. Mey. (Asclepiadaceae), an introduced weed in Australia. Biotropica 26: 214-217.
17. Forsyth SA (2003) Density-dependent seed set in the Haleakala silversword: evidence for an Allee effect. Oecologia 136: 551-557.
18. Grindeland JM, Sletvold N, Ims RA (2005) Effects of floral display size and plant density on pollinator visitation rate in a natural population of Digitalis purpurea. Funct Ecol 19: 383-390.
19. Groom MJ (1998) Allee effects limit population viability of an annual plant. Am Nat 151: 487-496.
20. Guo X, Pan W, Connett JE, Hannan PJ, French SA (2005) Small-sample performance of the robust score test and its modifications in generalised estimating equations. Stat Med 24: 3479-3495.
21. Højsgaard S, Halekoh U, Yan J (2005) The R package geepack for generalised estimating equations. J Stat Softw 15: 1-11.
22. Johnson SD, Torninger E, Ågren J (2009) Relationships between population size and pollen fates in a moth-pollinated orchid. Biol Lett 5: 282-285.
23. Johnson SD, Hollens H, Kulhmann M (2011) Competition versus facilitation: conspecific effects on pollinator visitation and seed set in the iris Lapeirousia oreogena. Oikos 121: 545-550.
24. Klank C, Pluess AR, Ghazoul J (2010) Effects of population size on plant reproduction and pollinator abundance in a specialized pollination system. J Ecol 98: 1389-1397.
25. Knight TM, Steets JA, Ashman TL (2006) A quantitativesynthesis of pollen supplementation experiments highlightsthe contribution of resource reallocation to estimates of pollenlimitation. Am J Bot 93: 271-277.
26. Lamont BB, Klinkhamer PGL, Witkowski ETF (1993) Population fragmentation may reduce fertility to zero in Banksia goodii: a demonstration of the Allee effect. Oecologia 94: 446-450.
27. Larson KC, Fowler SP, Walker JC (2002) Lack of pollinators limits fruit set in the exotic Lonicera japonica. Am Midl Nat 148: 54-60.
28. Leimu R, Mutikainen P, Koricheva J, Fischer M (2006) How general are positive relationships between plant population size, fitness and genetic variation? J Ecol 94: 942-952.
29. Lewis MA, Kareiva P (1993) Allee dynamics and the spread of invading organisms. Theor Popul Biol 43: 141-158.
30. Liang KY, Zeger S (1986) Longitudinal data analysis using generalised linear models. Biometrika 73: 13-22.
31. Moody ME, Mack RN (1988) Controlling the spread of plant invasions-the importance of nascent foci. J Appl Ecol 25: 1009-1021.
32. Morgan JW (1999) Effects of population size on seed production and germinability in an endangered, fragmented grassland plant. Conserv Biol 13: 266-273.
33. Mustajärvi K, Siikamaki P, Rytkonen S, Lammi A (2001) Consequences of plant population size and density for plant-pollinator interactions and plant performance. J Ecol 89: 80-87.
34. Parker IM (1997) Pollinator limitation of Cytisus scoparius (Scotch broom), an invasive exotic shrub. Ecology 78: 1457-1470.
35. Quinn GP, Keough MJ (2002) Experimental design and data analysis for biologists, 1st edn. Cambridge University Press, Cambridge.
36. Raijmann LL, van Leeuwen NC, Kersten R, Oostermeijer JGB, Dennijs HCM, Menken SBJ (1994) Genetic variation and outcrossing rate in relation to population size in Gentiana pneumonanthe L. Conserv Biol 8: 1014-1026.
37. Rambuda TD, Johnson SD (2004) Breeding systems of invasive alien plants in South Africa: does Baker's rule apply? Divers Distrib 10: 409-416.
38. Rathcke B (1983) Competition and facilitation amongst plants for pollination. In: Readl L (ed) Pollination biology. Academic, Orlando, pp 305-329.
39. R Development Core Team (2011) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL http://www. R-project. org.
40. Richardson DM, Allsopp N, D'Antonio CM, Milton SJ, Rejmánek M (2000) Plant invasions-the role of mutualisms. Biol Rev 75: 65-93.
41. Sih A, Baltus MS (1987) Patch size, pollinator behaviour, and pollinator limitation in Catnip. Ecology 68: 1679-1690.
42. Spigler RB, Chang S-M (2009) Pollen limitation and reproduction varies with population size in experimental populations of Sabatia angularis (Gentianaceae). Botany 87: 330-338.
43. Stephens PA, Sutherland WJ, Freckleton RP (1999) What is the Allee effect? Oikos 87: 185-190.
44. Steven JC, Rooney TP, Boyle OD, Waller DM (2003) Density-dependent pollinator visitation and self-incompatibility in upper Great Lakes populations of Trillium grandiflorum. J Torrey Bot Soc 130: 23-29.
45. Stoutamire WP (1971) Pollination in temperate American orchids. In: Corrigan MJ (ed) Proceedings of the Sixth World Orchid Conference. Australia, Sydney, pp 233-243.
46. van Kleunen M, Johnson SD (2005) Testing for ecological and genetic allee effects in the invasive shrub Senna didymobotrya (Fabaceae). Am J Bot 92: 1124-1130.
47. van Kleunen M, Fischer M, Johnson SD (2007) Reproductive assurance through self-fertilisation does not vary with population size in the alien invasive plant Daturastramonium. Oikos 116: 1400-1412.
48. van Treuren R, Bulsma R, Ouborg NJ, van Delden W (1993) The effects of population size and plant density on outcrossing rates in locally endangered Salvia pratensis. Evolution 47: 1094-1104.
49. Ward M, Johnson SD (2005) Pollen limitation and demographic structure in small fragmented populations of Brunsvigia radulosa (Amaryllidaceae). Oikos 108: 53-262.
50. Ward M, Johnson SD, Zalucki MP (2012) Modes of reproduction in three invasive milkweeds are consistent with Baker's rule. Biol Invasions 14: 1237-1250.
51. Widén B (1993) Demographic and genetic effects on reproduction as related to population size in a rare, perennial herb, Senecio integrifolius (Asteraceae). Biol J Linn Soc 50: 179-195.
52. Willi Y, Fischer M (2005) Genetic rescue in interconnected populations of small and large size of the self-incompatible Ranunculus reptans. Heredity 95: 437-443.
53. Woodson RE (1954) The North American species of Asclepias L. Ann Mo Bot Gard 41: 1-211.
54. Wyatt R (1976) Pollination and fruit-set in Asclepias: a reappraisal. Am J Bot 63: 845-851.
55. Wyatt R, Broyles SB, Lipow SR (2000) Pollen-ovule ratios in milkweeds (Asclepiadaceae): an exception that probes the rule. Syst Bot 25: 171-180.
56. Zorn-Arnold B, Howe HF (2007) Density and seed set in a self-compatible forb, Penstemon digitalis (Plantaginaceae), with multiple pollinators. Am J Bot 94: 1594-1602.