Floral traits mediate the vulnerability of aloes to pollen theft and inefficient pollination by bees

Annals of Botany

Volumn 109, Issue 4, 2012, Pages 761-772

  Hargreaves, Anna L ^a,b,c   Harder, Lawrence D ^a   Johnson, Steven D ^b  

^a UNIVERSITY OF CALGARY   (Canada)

^b UNIVERSITY OF KWAZULU NATAL   (South Africa)

^c QUEEN S UNIVERSITY   (Canada)

Author keywords

Aloe; Alooideae; Asphodeloideae; dichogamy; floral morphology; Pollen theft; pollination efficiency; Xanthorrhoeaceae

Indexed keywords

BEE; BIRD; FLOWER VISITING; FREQUENCY ANALYSIS; FUNCTIONAL MORPHOLOGY; INHIBITION; PHENOLOGY; PLANT-POLLINATOR INTERACTION; POLLEN; POLLINATION; REPRODUCTION; SEED PRODUCTION; SEED SET; VULNERABILITY;

ALOE; ANIMAL; ARTICLE; BEE; CHEMISTRY; FLOWER; NECTAR; PHYSIOLOGY; POLLINATION; SOUTH AFRICA;

ALOE; ANIMALS; BEES; FLOWERS; PLANT NECTAR; POLLINATION; SOUTH AFRICA;

ALOE; APOIDEA; AVES; HEXAPODA; XANTHORRHOEACEAE;

EID: 84857718513     PISSN: 03057364     EISSN: 10958290     Source Type: Journal    
DOI: 10.1093/aob/mcr324     Document Type: Article

References (51)

1. Aizen MA, Harder LD. 2007. Expanding the limits of the pollen-limitation concept: Effects of pollen quantity and quality. Ecology 88: 271-281. (Pubitemid 46596789)
2. Angiosperm Phylogeny Group. 2009. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnean Society 161: 105-121.
3. Ashman TL. 2000. Pollinator selectivity and its implications for the evolution of dioecy and sexual dimorphism. Ecology 81: 2577-2591.
4. Barrett SCH. 2002. Sexual interference of the floral kind. Heredity 88: 154-159. (Pubitemid 34196708)
5. Bertin R, Newman C. 1993. Dichogamy in angiosperms. Botanical Review 59: 112-152. (Pubitemid 24413782)
6. Bertin RI. 1993. Incidence of monoecy and dichogamy in relation to selffertilization in angiosperms. American Journal of Botany 80: 557-560. (Pubitemid 24412700)
7. Botes C, Johnson S, Cowling R. 2008. Coexistence of succulent tree aloes: Partitioning of bird pollinators by floral traits and flowering phenology. Oikos 117: 875-882. (Pubitemid 351871574)
8. Botes C, Johnson SD, Cowling RM. 2009a. The birds and the bees: Using selective exclusion to identify effective pollinators of African tree aloes. International Journal of Plant Sciences 170: 151-156.
9. Botes C, Wragg PD, Johnson SD. 2009b. New evidence for bee-pollination systems in Aloe (Asphodelaceae: Aloideae), a predominantly birdpollinated genus. South African Journal of Botany 75: 675-681.
10. Buchmann SL. 1983. Buzz pollination in angiosperms. In: Jones CE, Cane JH. eds. Handbook of experimental pollination biology. New York: Van Nostrand Reinhold, 73-113.
11. do Carmo RM, Franceschinelli EV, da Silveira FA. 2004. Introduced honeybees (Apis mellifera) reduce pollination success without affecting the floral resource taken by native pollinators. Biotropica 36: 371-376. (Pubitemid 39182881)
12. Cruden RW. 1972. Pollinators in high-elevation ecosystems: Relative effectiveness of birds and bees. Science 176: 1439-1440.
13. Danforth BN, Sipes S, Fang J, Brady SG. 2006. The history of early bee diversification based on five genes plus morphology. Proceedings of the National Academy of Sciences, USA 103: 15118-15123. (Pubitemid 44583174)
14. Efron B. 1979. Bootstrap methods: Another look at the jackknife. Annals of Statistics 7: 1-26.
15. Gross CL, Mackay D. 1998. Honeybees reduce fitness in the pioneer shrub Melastoma affine (Melastomataceae). Biological Conservation 86: 169-178. (Pubitemid 28467953)
16. Harder LD. 1990. Pollen removal by bumble bees and its implications for pollen dispersal. Ecology 71: 1110-1125. (Pubitemid 20429025)
17. Harder LD, Jordan CY, Gross WE, Routley MB. 2004. Beyond floricentrism: The pollination function of inflorescences. Plant Species Biology 19: 137-148. (Pubitemid 40059578)
18. Hargreaves AL. 2007. The ecological effects of pollen-stealing insects on plant reproductive success. MSc Thesis, University of Calgary, Calgary, Canada.
19. Hargreaves AL, Harder LD, Johnson SD. 2008. Aloe inconspicua: The first record of an exclusively insect-pollinated aloe. South African Journal of Botany 74: 606-612.
20. Hargreaves AL, Harder LD, Johnson SD. 2009. Consumptive emasculation: The ecological and evolutionary consequences of pollen theft. Biological Reviews 84: 259-276.
21. Hargreaves AL, Harder LD, Johnson SD. 2010. Native pollen thieves reduce the reproductive success of a hermaphroditic plant, Aloe maculata. Ecology 91: 1693-1703.
22. Heywood V, Brummitt R, Culham A, Seberg O. 2007. Flowering plant families of the world. Richmond Hill, ON: Firefly Books.
23. Hoffman MT. 1988. The pollination ecology of Aloe ferox Mill. South African Journal of Botany 54: 345-350.
24. Holland PG. 1978. Evolutionary biogeography of the genus Aloe. Journal of Biogeography 5: 213-226.
25. Ish-Am G, Eisikowitch D. 1993. The behavior of honey bees (Apis mellifera) visiting avocado (Persea americana) flowers and their contribution to its pollination. Journal of Apicultural Research 32: 175-186. (Pubitemid 2042302)
26. Johnson SD, Hargreaves AL, Brown M. 2006. Dark, bitter-tasting nectar functions as a filter of flower visitors in a bird-pollinated plant. Ecology 87: 2709-2716. (Pubitemid 44904856)
27. Kearns C, Inouye D. 1993. Techniques for pollination biologists. Niwot, CO: University Press of Colorado.
28. Kenward MG, Roger JH. 1997. Small sample inference for fixed effects from restricted maximum likelihood. Biometrics 53: 983-997. (Pubitemid 27391027)
29. Kirk RE. 1995. Experimental design: Procedures for the behavioural sciences. Pacific Grove, CA: Brooks/Cole Publishing Company.
30. Kromer T, Kessler M, Herzog SK. 2006. Distribution and flowering ecology of bromeliads along two climatically contrasting elevational transects in the Bolivian Andes. Biotropica 38: 183-195.
31. Kutner MH, Nachtsheim CJ, Neter J, Li W. 2005. Applied linear statistical models. New York: McGraw-Hill/Irwin.
32. Lau JA, Galloway LF. 2004. Effects of low-efficiency pollinators on plant fitness and floral trait evolution in Campanula americana (Campanulaceae). Oecologia 141: 577-583. (Pubitemid 40033025)
33. Liang KY, Zeger SL. 1986. Longitudinal data analysis using generalized linear models. Biometrika 73: 13-22.
34. Lloyd DG, Webb CJ. 1986. The avoidance of interference between the presentation of pollen and stigmas in Angiosperms 1. Dichogamy. New Zealand Journal of Botany 24: 135-162.
35. Manly B. 1997. Randomization, bootstrap and Monte Carlo methods in biology. London: Chapman & Hall.
36. McCullagh P, Nelder JA. 1989. Generalized linear models. London: Chapman and Hall.
37. Muller A, Diener S, Schnyder S, Stutz K, Sedivy C, Dorn S. 2006. Quantitative pollen requirements of solitary bees: Implications for bee conservation and the evolution of bee-flower relationships. Biological Conservation 130: 604-615.
38. Naaborgh AT, Willemse MTM. 1991. The ovular incompatibility system in Gasteria verrucosa (Mill) Duval,H. Euphytica 58: 231-240.
39. Ratsirarson J. 1995. Pollination ecology of Aloe divaricata, Berger (Liliaceae): An endemic plant-species of south-west Madagascar. South African Journal of Botany 61: 249-252. (Pubitemid 26454414)
40. Reynolds GW. 1950. The aloes of South Africa. Johannesburg: The Trustees of the Aloes of South Africa Book Fund.
41. Schnepf E, Pross E. 1976. Differentiaion and redifferentiation of a transfer cell: Development of septal nectaries of Aloe and Gasteria. Protoplasma 89: 105-115.
42. Stokes CJ, Yeaton RI. 1995. Population dynamics, pollination ecology and the significance of plant height in Aloe candelabrum. African Journal of Ecology 33: 101-113. (Pubitemid 26452245)
43. Symes CT, Human H, Nicolson SW. 2009. Appearances can be deceiving: Pollination in two sympatric winter-flowering Aloe species. South African Journal of Botany 75: 668-674.
44. Thomson J. 2003. When is it mutualism? (An American Society of Naturalists Presidential Address). American Naturalist 162: S1-S9. (Pubitemid 37425173)
45. Thomson JD, Thomson BA. 1992. Pollen presentation and viability schedules in animal-pollinated plants: Consequences for reproductive success. In: Wyatt R. ed. Ecology and evolution of plant reproduction. New York: Chapman and Hall, 1-25.
46. Treutlein J, Smith GF, van Wyk BE, Wink M. 2003. Phylogenetic relationships in Asphodelaceae (subfamily Alooideae) inferred from chloroplast DNA sequences (rbcL, matK) and from genomic fingerprinting (ISSR). Taxon 52: 193-207. (Pubitemid 36844605)
47. van Wyk B, Smith G. 2003. Guide to the Aloes of South Africa. Pretoria: Briza Publications.
48. Vaughton G. 1996. Pollination disruption by European honeybees in the Australian bird-pollinated shrub Grevillea barklyana (Proteaceae). Plant Systematics and Evolution 200: 89-100. (Pubitemid 126609745)
49. Vaughton G, Ramsey M. 2010. Floral emasculation reveals pollen quality limitation of seed output in Bulbine bulbosa (Asphodelaceae). American Journal of Botany 97: 174-178.
50. Webb CJ, Lloyd DG. 1986. The avoidance of interference between the presentation of pollen and stigmas in angiosperms 2. Hercogamy. New Zealand Journal of Botany 24: 163-178.
51. Wilson A,Ward D, BrownM, Johnson SD. 2009. Seed production in a threatened Aloe is not affected by bird exclusion or population size. Plant Ecology 203: 173-182.