Factors affecting pollinator movement and plant fitness in a specialized pollination system

Nattero, Julieta; Malerba, Romina; Medel, Rodrigo; Cocucci, Andrea A.

doi:10.1007/s00606-011-0477-4

Cited by 53 publications

(29 citation statements)

References 58 publications

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“…On the other hand, larger plants of the self-incompatible Ipomopsis aggregata received more geitonogamous pollen [32]. The connection between pollination, reproduction success and different measures of individual plant floral display was shown for many species, both SI and SC [18,33]. The lack of the effect of population properties might be due to the small range of population sizes and densities (only two populations were studied); for instance Groom [58], studying Clarkia concinna, found that when population size exceeded 50 individuals no clear relationship was observed.…”

Section: Ko Ze V (Sd) Tinf (Sd) Nf (Sd) V (Sd) Tinf (Sd) Nf (Sd)mentioning

confidence: 97%

“…As the appropriate pollinators' assemblages are strictly connected with the availability of suitable habitats [14,15], their service for plants resulting in reproductive success is modified by plant population properties. Pollinator visitation rates, time spent on the plant, number of flowers and individuals visited during a single bout may vary depending on the size of the plant population, density, and spatial pattern of flowering shoots [11,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Breeding system variability, pollination biology, and reproductive success of rare Polemonium caeruleum L. in NE Poland

et al. 2017

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Polemonium caeruleum (Polemoniaceae) represents a very interesting system of compatibility transition. Studies of its biological and ecological properties in the context of the breeding system of various populations may help to understand the evolutionary mechanism of this process. We investigated some aspects of the breeding system, diversity and foraging behavior of the visitors, and relationship between population properties and fruit set in three populations from NE Poland. We found distinct compatibility systems in two studied populations and showed that if a population is self-compatible (SC), selfing is mediated by insects via geitonogamous pollen transfer. Despite the population properties (compatibility, visitor diversity and activity, population size, density, or floral display), P. caeruleum is not pollen limited and pollinators are highly important as a key factor determining the high reproductive success. Visitor assemblages (including key pollinators, bumblebees, and honey bees) and their foraging behavior on inflorescences vary between the populations, which may influence differences in the breeding system. The selfincompatible population was visited by a more diverse group of insects from Hymenoptera, Diptera, Lepidoptera, Heteroptera, and Coeloptera, which may favor effective cross-pollen transfer, whereas the SC population was pollinated mainly by Apis mellifera, which may promote mixed-mating. Studies on a wider range of P. caeruleum populations are needed to determine selective factors responsible for compatibility transition.

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Section: Ko Ze V (Sd) Tinf (Sd) Nf (Sd) V (Sd) Tinf (Sd) Nf (Sd)mentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Breeding system variability, pollination biology, and reproductive success of rare Polemonium caeruleum L. in NE Poland

et al. 2017

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“…The spatial position determines the local microclimate, habitat structure, and plant community composition to which an individual plant is exposed (e.g., conspecific and heterospecific competition for resources), and each of these factors has the potential to influence PRS. This means that plant-animal interactions, and their outcomes in terms of PRS, will be largely conditioned by both plant distribution and the diversity of animal foraging strategies, promoting the emergence of spatially structured interaction outcomes (Carlo et al 2007, Nattero et al 2011. However, their foraging behaviors and movement patterns not only track the distribution of plants, but also respond to abundances and characteristics of alternate food sources, competing and predator species, and to specific abiotic conditions (Nathan et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Hotspots of damage by antagonists shape the spatial structure of plant–pollinator interactions

Rodríguez-Rodríguez

Jordano

Valido

2015

Ecology

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The balance between mutualistic and antagonistic plant-animal interactions and their spatial variation results in a highly dynamic mosaic of reproductive success within plant populations. Yet, the ecological drivers of this small-scale heterogeneity of interaction patterns and their outcomes remain virtually unexplored. We analyzed spatial structure in the frequency and intensity of interactions that vertebrate pollinators (birds and lizards) and invertebrate antagonists (florivores, nectar larcenists, and seed predators) had when interacting with the insular plant Isoplexis canariensis, and their effect on plant fitness. Spatially autocorrelated variation in plant reproductive success (fruit and viable seed set) emerged from the combined action of mutualists and antagonists, rather than reflecting the spatial pattern of any specific animal group. However, the influence of antagonists on plant fitness was stronger primarily due to the florivores' action on earlier reproductive stages, consuming and damaging floral structures before the arrival of pollinators. Our results indicate that the early action of antagonists creates hotspots of increased plant damage, where the effects of later acting mutualists are not translated into increased reproductive benefits. We foresee the potential for antagonists to shape the intra-population mosaics of plant fitness in situations where antagonists outnumber mutualists, when their interactions occur before those of mutualists, and when mutualists can detect and avoid damaged plants while foraging. Severely damaged plants in antagonistic hotspots might be excluded from the mating network and render a limited production of viable seeds, reducing both the growth rate of the plant population and the effective population size.

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“…Some pollinators visit flowers at a preferred height more frequently than the tallest (Peakall and Handel 1993). In addition, a variety of environmental characteristics, such as the relative amount of sunlight and flowering plant density, are known to influence pollinator behavior in other study systems (e.g., Herrera 1995;Grindeland et al 2005;Nattero et al 2011). Dense patches of plants offer clumped resources for pollinators and reduce their energy expenditure (Kacelnik et al 1986).…”

Section: Discussionmentioning

confidence: 98%

“…Taller Verbascum thapsus L. (Scrophulariaceae) plants are visited more frequently by pollinators compared with shorter unvisited neighboring individuals, and pollinators are required for maximum seed yield (Donnelly et al 1998). The size of a floral display, which is the number of open flowers on an individual plant, and the flowering plant density, which is the number of local plants in bloom, are also positively correlated with increased abundance of pollinators and increased likelihood that a single pollinator will choose a plant for the center of its foraging path (Mitchell et al 2004;Nattero et al 2011).…”

Section: Introductionmentioning

confidence: 98%

Breeding system of the critically endangered Lakela's Mint and influence of plant height on pollinators and seed output

Richardson

Keathley

Peterson³

2015

Population Ecology

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Understanding reproductive systems of rare plants is critical for conservation efforts. Lakela's Mint, Dicerandra immaculata Lakela var. immaculata, is an endangered plant endemic to an approximately 4.8-km long area in Florida, USA. We used an experimental garden and three populations of Lakela's Mint to determine: (1) what is the breeding system (autonomous, asexual, self-fertile, cross-fertile) and are insects necessary for reproduction; (2) which native and nonnative insect species visit flowers and is the frequency of visits to a plant influenced by its height;(3) does the number of flowers visited within a plant by individual insects differ among native and nonnative insect species and due to plant height; and (4) is seed output influenced by plant height? Our results indicate that the breeding system of Lakela's Mint was facultative outcrossing. Insect-pollinated flowers produced more seeds than flowers that reproduced autonomously or asexually. The honey bee Apis mellifera L., a nonnative species, was the most frequent visitor to plants and visited more flowers within plants than native pollinators, but its behavior was not influenced by plant height. Native pollinators such as Bombus impatiens Cresson were attracted more frequently to shorter plants, but visited fewer flowers than on taller plants. Despite having fewer total and pollinated flowers, shorter plants had a higher output of intact seeds than taller plants, which could be due to differences in efficiency between native and nonnative pollinators or other factors. Our results add insight into factors influencing seed output and interactions between pollinators and rare plants.

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Factors affecting pollinator movement and plant fitness in a specialized pollination system

Cited by 53 publications

References 58 publications

Breeding system variability, pollination biology, and reproductive success of rare Polemonium caeruleum L. in NE Poland

Breeding system variability, pollination biology, and reproductive success of rare Polemonium caeruleum L. in NE Poland

Hotspots of damage by antagonists shape the spatial structure of plant–pollinator interactions

Breeding system of the critically endangered Lakela's Mint and influence of plant height on pollinators and seed output

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