Do frugivores exert selection on fruiting phenology? Potential scenarios across three plant populations of a Neotropical vine, Passiflora caerulea

Palacio, Facundo Xavier; Cataudela, J. Francisco; Montalti, Diego; Ordano, Mariano

doi:10.1007/s10682-021-10121-0

Cited by 5 publications

(14 citation statements)

References 90 publications

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“…where ¯d was estimated as the average in the mean number of seeds removed in both time intervals (visit 2visit 1 and visit 3visit 2). Separate phenotypic selection analyses were undertaken for each population and fitness measure ( f r and total fitness); f r was estimated as the (accumulated) number of pecked fruits recorded in the last visit (Palacio et al, 2021). Fitness components were relativized to their mean population values (De Lisle, Svensson, 2017), and traits were standardized to mean = 0 and variance = 1 before analyses.…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Both surrogates are dependent stages of seed dispersal (Wang and Smith, 2002), as fruits need to be first pecked to disperse at least one seed, and a non‐pecked fruit results in no dispersal. Therefore, both fitness proxies assume that at least one seedling survives in the next generation, in contrast to non‐pecked fruits, for which this probability is zero (Palacio et al, 2021). In addition, the overall number of seeds dispersed assumes that every seed has the same probability to reach a suitable place for germination and growing, a factor largely dependent on bird behavior (Jordano and Schupp, 2000; Palacio et al, 2017a).…”

Section: Methodsmentioning

confidence: 99%

“…We monitored 25 (La Plata), 29 (Santa Fe), and 20 (Tucumán) fruiting plants in three sampling visits (encompassing 1 to 7 sampling days per visit). Due to differences in flower and fruiting phenology among the three populations (Palacio et al, 2021), visits were adjusted to span the main fruiting peak (November-December) at approximately even intervals (Dec. 2020-Jan. 2021in La Plata, Nov. 2020-Dec. 2021in Santa Fe, and Oct. 2020-Feb. 2021. At each sampling day, we visually recorded the number of ripe (orange) fruits (i.e., fruit crop size), the number of fruits with pieces of peel or pulp plus seeds removed (pecked fruits), and the number of fallen fruits.…”

Section: Plant Fruit and Seed Trait Measurementsmentioning

confidence: 99%

“…By contrast, fruit removal is indirectly linked to seed dispersal, and it is often implicitly assumed that increased fruit removal entails increased seed delivery. Despite being widely used in eco‐evolutionary studies, fruit removal has been disputed as a fitness proxy, given it often ignores the number of seeds effectively dispersed (Palacio et al, 2021). Nevertheless, there are several reasons for considering fruit removal as a fitness surrogate for seed removal.…”

Section: Figurementioning

confidence: 99%

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On the adequacy of fruit removal as a proxy for fitness in studies of bird‐mediated phenotypic selection

Palacio

Cataudela

Montalti

et al. 2023

American J of Botany

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In fleshy-fruited plants, fruit removal is widely used as a proxy for plant reproductive success. Nevertheless, this proxy may not accurately reflect the number of seeds dispersed, an assumed better proxy for total fitness (fruit removal × mean number of seeds dispersed per fruit). Methods: We examined under what circumstances fruit removal can be reliable as a proxy for total fitness when assessing bird-mediated selection on fruit traits. In three populations of the Blue Passionflower (Passiflora caerulea), we used the number of fruits pecked per plant as a surrogate for fruit removal to estimate phenotypic selection on fruit and seed traits, and simulations of the effect of the fruit-seed number trade-off on the number of fruits removed. Results: Fruit removal was a good indicator of fitness, accounting for 55 to 68% of the variability in total fitness, measured as total number of seeds removed. Moreover, multivariate selection analyses on fruit crop size, mean fruit diameter and mean seed number using fruit removal as a fitness proxy yielded similar selection regimes to those using total fitness. Simulations showed that producing more fruits, a lower number of seeds per fruit, and a higher variability in seed number can result in a negative relationship between fruit removal and total fitness. Conclusions: Our results suggest that fruit removal can be reliably used as a proxy for total fitness when (1) there is a weak fruit number-seed number trade-off, (2) fruit crop size and fruit removal correlate positively, and (3) seed number variability does not largely exceed fruit number variability.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Plant Fruit and Seed Trait Measurementsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 3 more Smart Citations

On the adequacy of fruit removal as a proxy for fitness in studies of bird‐mediated phenotypic selection

Palacio

Cataudela

Montalti

et al. 2023

American J of Botany

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Influence of crop size and sugar content on bird fruit feeding patterns on two sympatric Miconia (Melastomataceae) species on a continental island in the Brazilian Atlantic Forest domain

Abrahão,

Buckeridge,

Missagia

et al. 2024

Ornithol. Res.

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Urbanization shapes phenotypic selection of fruit traits in a seed-dispersal mutualism

Palacio

Ordano

2023

Evolution

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Urbanisation is currently one of the trademarks of the Anthropocene, accelerating evolutionary processes and reshaping ecological interactions over short time scales. Species interactions represent a fundamental pillar of diversity that is being altered globally by anthropogenic change. Urban environments, despite their potential impact, have seldom been studied in relation to how they shape natural selection of phenotypic traits in multispecies interactions. Using a seed-dispersal mutualism as a study system, we estimated the regime and magnitude of phenotypic selection exerted by frugivores on fruit and seed traits across three plant populations with different degrees of urbanisation (urban, semi-urban and rural). Urbanisation weakened phenotypic selection via an indirect, positive impact on fruit production and fitness and, to a lesser extent, through a direct positive effect on species visitation rates. Our results show that urban ecosystems may impact multifarious selection of traits in the short term, and highlight the role of humans in shaping eco-evolutionary dynamics of multispecies interactions.

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Do frugivores exert selection on fruiting phenology? Potential scenarios across three plant populations of a Neotropical vine, Passiflora caerulea

Cited by 5 publications

References 90 publications

On the adequacy of fruit removal as a proxy for fitness in studies of bird‐mediated phenotypic selection

On the adequacy of fruit removal as a proxy for fitness in studies of bird‐mediated phenotypic selection

Influence of crop size and sugar content on bird fruit feeding patterns on two sympatric Miconia (Melastomataceae) species on a continental island in the Brazilian Atlantic Forest domain

Urbanization shapes phenotypic selection of fruit traits in a seed-dispersal mutualism

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