Using ecological context to interpret spatiotemporal variation in natural selection

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Using ecological context to interpret spatiotemporal variation in natural selection. / Albertsen, Elena; Opedal, Øystein H.; Bolstad, Geir H.; Pérez-Barrales, Rocío; Hansen, Thomas F.; Pélabon, Christophe; Armbruster, W. Scott.

In: Evolution, 23.11.2020.

Research output: Contribution to journalArticle

Harvard

Albertsen, E, Opedal, ØH, Bolstad, GH, Pérez-Barrales, R, Hansen, TF, Pélabon, C & Armbruster, WS 2020, 'Using ecological context to interpret spatiotemporal variation in natural selection', Evolution. https://doi.org/10.1111/evo.14136

APA

Albertsen, E., Opedal, Ø. H., Bolstad, G. H., Pérez-Barrales, R., Hansen, T. F., Pélabon, C., & Armbruster, W. S. (2020). Using ecological context to interpret spatiotemporal variation in natural selection. Evolution. https://doi.org/10.1111/evo.14136

CBE

Albertsen E, Opedal ØH, Bolstad GH, Pérez-Barrales R, Hansen TF, Pélabon C, Armbruster WS. 2020. Using ecological context to interpret spatiotemporal variation in natural selection. Evolution. https://doi.org/10.1111/evo.14136

MLA

Vancouver

Author

Albertsen, Elena ; Opedal, Øystein H. ; Bolstad, Geir H. ; Pérez-Barrales, Rocío ; Hansen, Thomas F. ; Pélabon, Christophe ; Armbruster, W. Scott. / Using ecological context to interpret spatiotemporal variation in natural selection. In: Evolution. 2020.

RIS

TY - JOUR

T1 - Using ecological context to interpret spatiotemporal variation in natural selection

AU - Albertsen, Elena

AU - Opedal, Øystein H.

AU - Bolstad, Geir H.

AU - Pérez-Barrales, Rocío

AU - Hansen, Thomas F.

AU - Pélabon, Christophe

AU - Armbruster, W. Scott

PY - 2020/11/23

Y1 - 2020/11/23

N2 - Spatiotemporal variation in natural selection is expected, but difficult to estimate. Pollinator-mediated selection on floral traits provides a good system for understanding and linking variation in selection to differences in ecological context. We studied pollinator-mediated selection in five populations of Dalechampia scandens (Euphorbiaceae) in Costa Rica and Mexico. Using a nonlinear path-analytical approach, we assessed several functional components of selection, and linked variation in pollinator-mediated selection across time and space to variation in pollinator assemblages. After correcting for estimation error, we detected moderate variation in net selection on two out of four blossom traits. Both the opportunity for selection and the mean strength of selection decreased with increasing reliability of cross-pollination. Selection for pollinator attraction was consistently positive and stronger on advertisement than reward traits. Selection on traits affecting pollen transfer from the pollinator to the stigmas was strong only when cross-pollination was unreliable and there was a mismatch between pollinator and blossom size. These results illustrate how consideration of trait function and ecological context can facilitate both the detection and the causal understanding of spatiotemporal variation in natural selection.

AB - Spatiotemporal variation in natural selection is expected, but difficult to estimate. Pollinator-mediated selection on floral traits provides a good system for understanding and linking variation in selection to differences in ecological context. We studied pollinator-mediated selection in five populations of Dalechampia scandens (Euphorbiaceae) in Costa Rica and Mexico. Using a nonlinear path-analytical approach, we assessed several functional components of selection, and linked variation in pollinator-mediated selection across time and space to variation in pollinator assemblages. After correcting for estimation error, we detected moderate variation in net selection on two out of four blossom traits. Both the opportunity for selection and the mean strength of selection decreased with increasing reliability of cross-pollination. Selection for pollinator attraction was consistently positive and stronger on advertisement than reward traits. Selection on traits affecting pollen transfer from the pollinator to the stigmas was strong only when cross-pollination was unreliable and there was a mismatch between pollinator and blossom size. These results illustrate how consideration of trait function and ecological context can facilitate both the detection and the causal understanding of spatiotemporal variation in natural selection.

KW - Dalechampia scandens

KW - path analysis

KW - phenotypic selection

KW - plant-pollinator interaction

KW - pollen limitation

KW - spatial variation

KW - temporal variation

U2 - 10.1111/evo.14136

DO - 10.1111/evo.14136

M3 - Article

AN - SCOPUS:85097978635

JO - Evolution; international journal of organic evolution

JF - Evolution; international journal of organic evolution

SN - 1558-5646

ER -