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Effects of forest fragmentation on male and female reproductive success in Cestrum parqui (Solanaceae)

  • Population Ecology
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Abstract

In this paper we evaluate the effects of forest fragmentation on male (pollen removal, pollen load, and pollen tubes) and female reproductive success (fruit- and seed-set) of Cestrum parqui, a self-incompatible, pollination-specialist plant species. We also measure focal individual conspecific density to account for possible density-related effects that could influence the response variables. We calculate an index which incorporates male and female fitness and gives an integrated assessment of overall reproductive success. Forest fragmentation strongly affected the amount of pollen grains on stigmas and number of pollen tubes as well as seed-set, decreasing from continuous forest to small forest fragments, whereas focal individual conspecific density failed to explain any of the variability for the studied variables. Declines in overall reproductive success (i.e. male and female) in small forest fragments are ascribed to decreases in both the quality and quantity of pollination. Self-incompatibility coupled with a specialist pollination system may be particularly important traits determining the negative fragmentation effects observed in C. parqui. Logarithmic regression models described the behaviour of the variables along the fragmentation size gradient, allowing us to detect a threshold below which the effects of fragmentation begin to negatively affect reproductive success in C. parqui. Our results emphasize the importance of evaluating both components of the total plant fitness, as well as including simultaneously several aspects of pollination and reproduction processes when assessing the effects of forest fragmentation on plant reproductive success.

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References

  • Ågren J (1996) Population size, pollinator limitation, and seed set in the self-incompatible herb Lythrum salicaria. Ecology 77:2779–1790

    Google Scholar 

  • Aizen MA, Feinsinger P (1994a) Forest fragmentation, pollination and plant reproduction in a chaco dry forest, Argentina. Ecology 75:330–351

    Google Scholar 

  • Aizen MA, Feinsinger P (1994b) Habitat fragmentation, native insect pollinators, and feral honey bees in Argentine “Chaco Serrano”. Ecol Appl 4:378–392

    Google Scholar 

  • Aizen MA, Ashworth L, Galetto L (2002) Reproductive success in fragmented habitats: do compatibility systems and pollination specialization matter? J Veg Sci 13:885–892

    Google Scholar 

  • Bertin RI (1988) Paternity in plants. In: Lovett Doust J, Lovett Doust L (eds) Plant reproductive ecology. Patterns and strategies. Oxford University Press, New York, pp 30–59

  • Bond WJ (1994) Do mutualisms matter? Assessing the impact of pollinator and disperser disruption on plant extinction. Phil Trans R Soc Lond B 344:83-90

    Google Scholar 

  • Boutin S, Hebert D (2002) Landscape ecology and forest management: developing an effective partnership. Ecol Appl 12:390–397

    Google Scholar 

  • Campbell DR (1989) Measurements of selection in a hermaphroditic plant: variation in male and female pollination success. Evolution 43:318–334

    Google Scholar 

  • Campbell DR (1991) Comparing pollen dispersal and gene flow in a natural plant population. Evolution 45:1965–1968

    Google Scholar 

  • Cascante A, Quesada M, Lobo JJ, Fuchs EA (2002) Effects of dry tropical forest fragmentation on the reproductive success and genetic structure of the tree Samanea saman. Conserv Biol 16:137–147

    Article  Google Scholar 

  • Costin BJ, Morgan JW, Young AG (2001) Reproductive success does not decline in fragmented populations of Leucochrysum albicans subsp. albicans var. tricolor (Asteraceae). Biol Conserv 98:273–284

    Article  Google Scholar 

  • Cruzan MB (2001) Population size and fragmentation thresholds for the maintenance of genetic diversity in the herbaceous endemic Scutellaria montana (Lamiaceae). Evolution 55:1569–1580

    CAS  PubMed  Google Scholar 

  • Cunningham SA (2000a) Depressed pollination in habitat fragments causes low fruit set. Proc R Soc Lond Ser B 267:1149–1152

    Article  CAS  Google Scholar 

  • Cunningham SA (2000b) Effects of habitat fragmentation on the reproductive ecology of four plant species in mallee woodland. Conserv Biol 14:758–768

    Article  Google Scholar 

  • Didham RK (1996) Insects in fragmented forests: a functional approach. Trends Ecol Evol 11:255–260

    Google Scholar 

  • Feinsinger P, Tiebout HM, Young BE (1991) Do tropical bird-pollinated plants exhibit density-dependent interaction? Field experiments. Ecology 72:1953–1963

    Google Scholar 

  • Fritz AL, Nilsson LA (1994) How pollinator-mediated mating varies with population size in plants Oecologia 100:451–462

  • Fuchs EJ, Lobo JA, Quesada M (2003) Effects of forest fragmentation and flowering phenology on the reproductive success and mating patterns of the tropical dry forest tree Pachira quinata. Conserv Biol 17:149–157

    Article  Google Scholar 

  • Ghazoul J, Liston KA, Boyles TJB (1998) Disturbance-induced density-dependence seed set in Shorea siamensis (Dipterocarpaceae), a tropical forest tree. J Ecol 86:462–473

    Article  Google Scholar 

  • Gilpin ME, Soulé ME (1986) Minimum viable populations: processes of species extinction. In: Soulé ME (ed) Conservation biology: the science of scarcity and diversity. Sinauer, Mass., pp 11–34

  • Groom MJ (1998) Allee effects limit population viability of an annual plant. Am Nat 151:487–496

    Article  Google Scholar 

  • Jacquemyn H, Brys R, Hermy M (2002) Patch occupancy, population size and reproductive success of a forest herb ( Primula elatior) in a fragmented landscape. Oecologia 130:617–625

    Article  Google Scholar 

  • Jules ES, Rathcke BJ (1999) Mechanisms of reduced Trillium recruitment along edges of old-growth forest fragments. Conserv Biol 13:784–793

    Article  Google Scholar 

  • Jules ES, Frost EJ, Mills LS, Tallmon DA (1999) Ecological consequences of forest fragmentation in the Klamath region. Nat Areas J 19:368–378

    Google Scholar 

  • Kunin WE (1993) Sex and the single mustard: population density and pollinator behavior effects on seed-set. Ecology 74:2145–2160

    Google Scholar 

  • Kunin WE (1997) Population size and density effects in pollination: pollinator foraging and plant reproductive success in experimental arrays of Brassica kaber. J Ecol 85:225–234

    Google Scholar 

  • Lamont BB, Klinkhamer PGL, Witkowski ETF (1993) Population fragmentation may reduce fertility to zero in Banksia goodii - a demostration of the Allee effect. Oecologia 94:446–450

    Google Scholar 

  • Martin FW (1959) Staining and observing pollen tubes in the style by means of fluorescence. Stain technol 34:125–128

    CAS  Google Scholar 

  • Morales CL, Galetto L (2003) Influence of compatibility system and life form on plant reproductive success. Plant Biol 5:567–573

    Article  Google Scholar 

  • Morgan JW (1999) Effects of population size on seed production and germinability in an endangered, fragmented grassland plant. Conserv Biol 13:266–273

    Article  Google Scholar 

  • Murcia C (1996) Forest fragmentation and the pollination of neotropical plants. In: Schelhas J, Greenberg R (eds) Forest patches in tropical landscapes. Island Press, Washington, D.C., pp 19–36

  • Murren CJ (2002) Effects of habitat fragmentation on pollination: pollinators, pollinia viability and reproductive success. J Ecol 90:100–107

    Article  Google Scholar 

  • Nason JD, Hamrick JL (1997) Reproductive and genetic consequences of forest fragmentation: two case studies of Neotropical canopy trees. J Hered 84:1–12

    Google Scholar 

  • Nason JD, Herre EA, Hamrick JL (1998) The breeding structure of a tropical keystone plant resource. Nature 391:685–687

    CAS  Google Scholar 

  • Olensen JM, Warncke E (1989) Temporal changes in pollen flow and neighbourhood structure in a population of Saxifraga hirculus L. Oecologia 79:205–211

    Google Scholar 

  • Oostermeijer JGB, Luijten SH, Krenova ZV, Nijs HCM den (1998) Relationships between population and habitat characteristics and reproduction of the rare Gentiana pneumonanthe L. Conserv Biol 12:1042–1053

    Article  Google Scholar 

  • Ouborg NJ, Treuren R van, Damme JMM van (1991) The significance of genetic erosion in the process of extiction. II. Morphological variation and fitness components in populations of varying size of Salvia pratensis L. and Scabiosa columbaria L. Oecologia 86:359–367

    Google Scholar 

  • Parra-Tabla V, Vargas CF, Magaña-Rueda S, Navarro J (2000) Female and male pollination success of Oncidium ascendens Lindey (Orchidaceae) in two contrasting habitat patches: forest vs. agricultural field. Biol Conserv 94:335–340

    Article  Google Scholar 

  • Powell AH, Powell GVN (1987) Population dynamics of male euglosine bees in Amazonian forest fragments. Biotropica 19:176–179

    Google Scholar 

  • Queller D (1997) Pollen removal, paternity, and the male function of flowers. Am Nat 149:585–594

    Article  Google Scholar 

  • Quesada M, Stoner KE, Rosas-Guerrero V, Palacios-Guevara C, Lobo JA (2003) Effects of habitat disruption on the activity of nectarivorous bats (Chiroptera: Phyllostomidae) in a dry tropical forest: implications for the reproductive success of the neotropical tree Ceiba grandiflora. Oecologia 135:400–406

    PubMed  Google Scholar 

  • Rathcke BJ (1983) Competition and facilitation among plants for pollination. In: Real L (ed) Pollination biology. Academic Press, Orlando, Fla., pp 305–329

  • Rathcke BJ, Jules ES (1993) Habitat fragmentation and plant-pollinator interactions. Curr Sci 65:273–277

    Google Scholar 

  • Rocha OJ, Aguilar G (2001) Reproductive biology of the dry forest tree Enterolobium cyclocarpum (Guanacaste) in Costa Rica: a comparison between trees left in pastures and trees in continuous forest. Am J Bot 88:1607–1614

    Google Scholar 

  • Romanutti AA, Hunziker AT (1998) Tribu Cestreae. Flora Fanerogámica Argentina, vol 55. CONICET, Córdoba, Argentina pp 1–14

  • Saunders DA, Hobbs RJ, Margules CR (1991) Biological consequences of ecosystem fragmentation: a review. Conserv Biol 5:18–32

    Google Scholar 

  • Spears EE (1987) Island and mainland pollination ecology of Centrosema virginiatum and Opuntia stricta. J Ecol 75:351–362

    Google Scholar 

  • SPSS (1999) SPSS for Windows: base system user’s guide. Release 10.0. SPSS, Chicago, Ill.

    Google Scholar 

  • Stanton ML, Ashman TL, Galloway LF, Young HJ (1992) Estimating male fitness of plants in natural populations. In: Wyatt R (ed) Ecology and evolution of plant reproduction: New approaches. Chapman & May, New York, pp 62–90

  • Stephenson AG, Bertin RI (1983) Male competition, female choice, and sexual selection in plants. In: Real L (ed) Pollination biology. Academic Press, Orlando, Fla., pp 109–149

  • Waser NM, Price MV (1991) Outcrossing distance effects in Delphinium nelsonii: pollen loads, polen tubes, and seed set. Ecology 72:171–179

    Google Scholar 

  • White GM, Boshier DH, Powell W (2002) Increased pollen flow counteracts fragmentation in a tropical dry forest: an example from Swietenia humilis Zuccarini. Proc Acad Natl Sci USA 99:2038–2042

    Article  CAS  Google Scholar 

  • Wilcock C, Neiland R (2002) Pollination failure in plants: why it happens and when it matters. Trends Plant Sci 7:270–277

    Article  CAS  PubMed  Google Scholar 

  • Wolf AT, Harrison SP (2001) Effects of habitat size and patch isolation on reproductive success of the serpentine morning glory. Conserv Biol 15:111–121

    Article  Google Scholar 

  • Young A, Boyle T, Brown T (1996) The population genetic consequences of habitat fragmentation for plants. Trends Ecol Evol 11:413–418

    Article  Google Scholar 

  • Zar JH (1984) Biostatistical Analysis, 2nd edn. Prentice Hall, London

Download references

Acknowledgements

We appreciate the valuable comments of two anonymous reviewers that helped to improve this manuscript. We are also grateful to Marcel Zak and Marcelo Cabido for providing us with the satellite images used to localize and select the forest fragments. This work was supported by funds from the Agencia Nacional para la Promoción de la Ciencia y Tecnología, the Agencia Córdoba Ciencia, and the Secretaría de Ciencia y Técnica, Universidad Nacional Córdoba. L. G. is a member of the Carrera del Investigador of CONICET and R. A. holds a fellowship from the same institution.

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  1. Instituto Multidisciplinario de Biología Vegetal, Universidad Nacional de Córdoba, CONICET, C.C. 495, C.P. 5000, Córdoba, Argentina

    Ramiro Aguilar & Leonardo Galetto

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  1. Ramiro Aguilar
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  2. Leonardo Galetto
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Correspondence to Ramiro Aguilar.

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Aguilar, R., Galetto, L. Effects of forest fragmentation on male and female reproductive success in Cestrum parqui (Solanaceae). Oecologia 138, 513–520 (2004). https://doi.org/10.1007/s00442-003-1451-9

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