Geographic consistency and variation in conflicting selection generated by pollinators and seed predators

Sun, Shi‐Guo; Armbruster, W. Scott; Huang, Shuang‐Quan

doi:10.1093/aob/mcw097

Cited by 17 publications

(24 citation statements)

References 64 publications

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“…Ehrlén & Münzbergová, 2009;Leimu et al, 2012;Sun et al, 2016;Thomsen & Sargent, 2017). Ehrlén & Münzbergová, 2009;Leimu et al, 2012;Sun et al, 2016;Thomsen & Sargent, 2017).…”

Section: Introductionunclassified

“…Plant interactions with herbivores represent important selection pressure on various plant traits, including those related to plant growth, reproduction, and production of various metabolites (e.g. Ehrlén & Münzbergová, 2009;Leimu et al, 2012;Sun et al, 2016;Thomsen & Sargent, 2017). To deal with herbivory, plants have evolved a wide range of defence mechanisms, 666 Marcela Kuglerová et al 2016;Münzbergová & Skuhrovec, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Relative importance of drought, soil quality, and plant species in determining the strength of plant–herbivore interactions

Kuglerová

Skuhrovec

Münzbergová

2019

Ecological Entomology

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1. Although studies on plant-herbivore interactions comparing different plant species are common, little is known about the importance of environmental conditions in determining variation in herbivory within single plant species.2. This study assessed the effects of experimentally manipulated nutrient and water availability on plant palatability, and compared these differences with differences among species. The extent to which these patterns can be explained by leaf toughness and specific leaf area was also investigated. Six plant species from the subfamily Carduoideae and four free-living leaf chewing invertebrates were used in the study.3. Herbivore preferences were significantly affected by soil nutrients and water regime and varied among plant as well as herbivore species. Generally, herbivores preferred watered plants and plants from nutrient-poor soil. The effects of soil nutrients and water regime differed between the plant and herbivore species. The differences between the plant species were greater than those between the environmental treatments. Differences at both levels could be partly explained by leaf toughness and specific leaf area. Leaf toughness, in particular, turned to be an important predictor indicating that herbivores preferred species with softer leaves, and species from wetter conditions with reduced leaf toughness.4. The environmental conditions in which plants are growing have significant effects on plant palatability. Between-species comparisons thus need to pay attention to this variation. Future studies may consider how the effects of current conditions interact with conditions of plant origin to predict possible effects of changes in environmental conditions on the intensity of plant-herbivore interactions.

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“…Ehrlén & Münzbergová, 2009;Leimu et al, 2012;Sun et al, 2016;Thomsen & Sargent, 2017). Ehrlén & Münzbergová, 2009;Leimu et al, 2012;Sun et al, 2016;Thomsen & Sargent, 2017).…”

Section: Introductionunclassified

Section: Introductionmentioning

confidence: 99%

Relative importance of drought, soil quality, and plant species in determining the strength of plant–herbivore interactions

Kuglerová

Skuhrovec

Münzbergová

2019

Ecological Entomology

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“… AIC, Akaike information criterion and BIC, Bayesian information criterion. We used model selection to evaluate the models that were lowest finite sample‐corrected, and AIC was used to select the best model (see Sun et al., ). …”

Section: Resultsmentioning

confidence: 99%

“…Model 1 (fixed = anther tempera- square root-transformed to normalize model residuals (Waser & Price, 2016). The lowest finite sample-corrected Akaike information criteria were used to indicate the best model (Sun, Armbruster, & Huang, 2016). Calculations were performed via the glmer function in the lme4 package (Bates, Maechler, & Bolker, 2011), and the glmulti package (Calcagno, 2011) in R (R Development Core Team, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Hand pollination experiments showed that seed set differed between the two flower colors and that it changed over the course of AIC, Akaike information criterion and BIC, Bayesian information criterion. We used model selection to evaluate the models that were lowest finite samplecorrected, and AIC was used to select the best model (see Sun et al, 2016). Wald Chi-square p-values for model-term effects: ***p < .001; **p < .01; no asterisk: p > .05.…”

Section: Effects Of Pollen Viability and Pollen Deposition On Seed Setmentioning

confidence: 99%

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Pollinator preference and pollen viability mediated by flower color synergistically determine seed set in an Alpine annual herb

Yang

Luo

et al. 2017

Ecology and Evolution

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Gentiana leucomelaena manifests dramatic flower color polymorphism, with both blue‐ and white‐flowered individuals (pollinated by flies and bees) both within a population and on an individual plant. Previous studies of this species have shown that pollinator preference and flower temperature change as a function of flower color throughout the flowering season. However, few if any studies have explored the effects of flower color on both pollen viability (mediated by anther temperature) and pollinator preference on reproductive success (seed set) in a population or on individual plants over the course of the entire flowering season. Based on prior observations, we hypothesized that flower color affects both pollen viability (as a function of anther temperature) and pollen deposition (as a function of pollinator preference) to synergistically determine reproductive success during the peak of the flowering season. This hypothesis was tested by field observations and hand pollination experiments in a Tibetan alpine meadow. Generalized linear model and path analyses showed that pollen viability was determined by flower color, flowering season, and anther temperature. Anther temperature correlated positively with pollen viability during the peak of the early flowering season, but negatively affected pollen viability during the peak of the mid‐ to late flowering season. Pollen deposition was determined by flower color, flowering season (early, or mid‐ to late season), and pollen viability. Pollen viability and pollen deposition were affected by flower color that in turn affected seed set across the peak of the flowering season (i.e., when the greatest number of flowers were being pollinated). Hand pollination experiments showed that pollen viability and pollen deposition directly influenced seed set. These data collectively indicate that the preference of pollinators for flower color and pollen viability changed during the flowering season in a manner that optimizes successful reproduction in G. leucomelaena. This study is one of a few that have simultaneously considered the effects of both pollen viability and pollen deposition on reproductive success in the same population and on individual plants.

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No evidence that seed predators constrain pollinator‐mediated trait evolution in a tropical vine

Opedal

Albertsen

Pérez‐Barrales

et al. 2019

American J of Botany

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Premise of the Study Turnover in biotic communities across heterogeneous landscapes is expected to lead to variation in interactions among plants, their mutualists, and their antagonists. Across a fragmented landscape in northern Costa Rica, populations of the euphorb vine Dalechampia scandens vary widely in mating systems and associated blossom traits. Previous work suggested that populations are well adapted to the local reliability of pollination by apid and megachilid bees. We tested whether variation in the intensity of predispersal seed predation by seed weevils in the genus Nanobaris also contributes to the observed variation in blossom traits. Methods We studied spatiotemporal variation in the relationships between floral advertisement and the probability of seed predation within three focal populations. Then we assessed among‐population covariation of predation rate, pollination reliability, mating system, and blossom traits across 20 populations. Key Results The probability of seed predation was largely unrelated to variation in floral advertisement both within focal populations and among the larger sample of populations. The rate of seed predation was only weakly associated with the rate of cross‐pollination (allogamy) in each population but tended to be proportionally greater in populations experiencing less reliable pollination. Conclusions These results suggest that geographic variation in the intensity of antagonistic interactions have had only minor modifying effects on the evolutionary trajectories of floral advertisement in plant populations in this system. Thus, pollinator‐driven floral trait evolution in D. scandens in the study area appears not to be influenced by conflicting seed‐predator‐mediated selection.

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Geographic consistency and variation in conflicting selection generated by pollinators and seed predators

Cited by 17 publications

References 64 publications

Relative importance of drought, soil quality, and plant species in determining the strength of plant–herbivore interactions

Relative importance of drought, soil quality, and plant species in determining the strength of plant–herbivore interactions

Pollinator preference and pollen viability mediated by flower color synergistically determine seed set in an Alpine annual herb

No evidence that seed predators constrain pollinator‐mediated trait evolution in a tropical vine

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