Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos

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Standard

Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos. / Nielsen, Lene Rostgaard; Philipp, Marianne; Siegismund, Hans R.

In: Evolutionary Ecology, Vol. 16, No. 2, 2002, p. 139-153.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Nielsen, LR, Philipp, M & Siegismund, HR 2002, 'Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos', Evolutionary Ecology, vol. 16, no. 2, pp. 139-153. https://doi.org/10.1023/A:1016301027929

APA

Nielsen, L. R., Philipp, M., & Siegismund, H. R. (2002). Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos. Evolutionary Ecology, 16(2), 139-153. https://doi.org/10.1023/A:1016301027929

Vancouver

Nielsen LR, Philipp M, Siegismund HR. Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos. Evolutionary Ecology. 2002;16(2):139-153. https://doi.org/10.1023/A:1016301027929

Author

Nielsen, Lene Rostgaard ; Philipp, Marianne ; Siegismund, Hans R. / Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos. In: Evolutionary Ecology. 2002 ; Vol. 16, No. 2. pp. 139-153.

Bibtex

@article{61b5a6f2a6c94fb797af7fb2840c79b5,
title = "Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Gal{\'a}pagos",
abstract = "The presence of neuter ray florets in species within Asteraceae is generally believed to increase pollinator attraction. In the endemic Gal{\'a}pagos genus Scalesia (Asteraceae) a natural variation in the presence/absence of neuter ray florets is found. To evaluate whether the presence of ray florets plays a selective role on female reproductive success we chose two species of Scalesia, Scalesia affinis that carries ray florets and S. pedunculata that is rayless. On Santa Cruz Island capitula of S. pedunculata were equipped with fake ray florets while others were untouched. On Isabela Island ray florets were removed on half of the capitula of S. affinis. In S. affinis rayed capitula received more pollinators and more pollen, which resulted in a significantly higher embryo production. In S. pedunculata no effect on embryo production was found. The disagreement between the two species may correspond to a difference in visitation frequency, S. pedunculata receiving many more visit than S. affinis. Thus, ray floret development proved beneficial in pollinator-restricted localities.",
author = "Nielsen, {Lene Rostgaard} and Marianne Philipp and Siegismund, {Hans R.}",
year = "2002",
doi = "10.1023/A:1016301027929",
language = "English",
volume = "16",
pages = "139--153",
journal = "Evolutionary Ecology",
issn = "0269-7653",
publisher = "Springer",
number = "2",

}

RIS

TY - JOUR

T1 - Selective advantage of ray florets in Scalesia affinis and S. pedunculata (Asteraceae), two endemic species from the Galápagos

AU - Nielsen, Lene Rostgaard

AU - Philipp, Marianne

AU - Siegismund, Hans R.

PY - 2002

Y1 - 2002

N2 - The presence of neuter ray florets in species within Asteraceae is generally believed to increase pollinator attraction. In the endemic Galápagos genus Scalesia (Asteraceae) a natural variation in the presence/absence of neuter ray florets is found. To evaluate whether the presence of ray florets plays a selective role on female reproductive success we chose two species of Scalesia, Scalesia affinis that carries ray florets and S. pedunculata that is rayless. On Santa Cruz Island capitula of S. pedunculata were equipped with fake ray florets while others were untouched. On Isabela Island ray florets were removed on half of the capitula of S. affinis. In S. affinis rayed capitula received more pollinators and more pollen, which resulted in a significantly higher embryo production. In S. pedunculata no effect on embryo production was found. The disagreement between the two species may correspond to a difference in visitation frequency, S. pedunculata receiving many more visit than S. affinis. Thus, ray floret development proved beneficial in pollinator-restricted localities.

AB - The presence of neuter ray florets in species within Asteraceae is generally believed to increase pollinator attraction. In the endemic Galápagos genus Scalesia (Asteraceae) a natural variation in the presence/absence of neuter ray florets is found. To evaluate whether the presence of ray florets plays a selective role on female reproductive success we chose two species of Scalesia, Scalesia affinis that carries ray florets and S. pedunculata that is rayless. On Santa Cruz Island capitula of S. pedunculata were equipped with fake ray florets while others were untouched. On Isabela Island ray florets were removed on half of the capitula of S. affinis. In S. affinis rayed capitula received more pollinators and more pollen, which resulted in a significantly higher embryo production. In S. pedunculata no effect on embryo production was found. The disagreement between the two species may correspond to a difference in visitation frequency, S. pedunculata receiving many more visit than S. affinis. Thus, ray floret development proved beneficial in pollinator-restricted localities.

U2 - 10.1023/A:1016301027929

DO - 10.1023/A:1016301027929

M3 - Journal article

VL - 16

SP - 139

EP - 153

JO - Evolutionary Ecology

JF - Evolutionary Ecology

SN - 0269-7653

IS - 2

ER -

ID: 185241777