Population Size and Density Effects in Pollination: Pollinator Foraging and Plant Reproductive Success in Experimental Arrays of Brassica Kaber

Kunin, William E.

doi:10.2307/2960653

Cited by 397 publications

(395 citation statements)

References 28 publications

Supporting

Mentioning

368

Contrasting

Unclassified

Order By: Relevance

“…This was recently supported by a study by Jakobsson et al (2008) (Schulke and Waser 2001) and, when foraging, respond to large-scale changes in habitat structure (Menzel et al 1997;Steffan-Dewenter et al 2002). However, in other studies, it has been shown that foraging behaviour of pollinators can change in response to floral abundance at small spatial scales (Kunin 1997;Goverde et al 2002;Ghazoul 2006;Lopezaraiza et al 2007). …”

Section: Discussionmentioning

confidence: 82%

Indirect interactions between invasive and native plants via pollinators

Kaiser‐Bunbury

Müller

2008

Naturwissenschaften

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 82%

Indirect interactions between invasive and native plants via pollinators

Kaiser‐Bunbury

Müller

2008

Naturwissenschaften

View full text Add to dashboard Cite

“…The differences between sites appear to be robust if one considers that our lack of knowledge regarding several parameters (pollinator species composition, age, sex, experience of individuals) introduced potential variance in our data that would favour the null hypothesis that no differences exist. While the majority of studies have observed that the density of flowering species can be positively correlated with pollinator visitation rates and plant reproductive success (Gunton and Kunin 2009;Kunin 1993Kunin , 1997Sih and Baltus 1987;Sun et al 2010), so far no one has explicitly focussed on the phenotypic plasticity of pollinator foraging behaviour facing cheaters derived from a rewarding species in dense and sparse populations.…”

Section: Discussionmentioning

confidence: 99%

“…Plant populations/communities with higher densities generally attract a larger number of pollinators and have a higher reproductive output than lower densities (Bernhardt et al 2008;Gunton and Kunin 2009;Kunin 1997). Large floral aggregations supposedly emit more olfactory and visual cues to attract pollinators (Shao et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Variable responses of hawkmoths to nectar-depleted plants in two native Petunia axillaris (Solanaceae) populations

Brandenburg

Bshary

2011

Arthropod-Plant Interactions

View full text Add to dashboard Cite

Pollination success of deceptive orchids is affected by the density and distribution of nectar providing plant species and overall plant density. Here we extended the framework of how plant density can affect pollination to examine how it may promote the success of plant intraspecific cheaters. We compared hawkmoth behaviour in two native populations of Petunia axillaris, where we simultaneously offered rewarding and manually depleted P. axillaris. We asked whether pollinator foraging strategies change as a function of plant density and whether such changes may differentially affect nectarless plants. We observed the first choice and number of flowers visited by pollinators and found that in the dense population, pollinators visited more flowers on rewarding plants than on nectar-depleted plants. In the sparse population, such discrimination was absent. As we found no differences in nectar volume between plants of the two populations, the observed differences in plant density may be temporal. We reason that if differences were more permanent, an equivalent of the remote habitat hypothesis prevails: in a sparse population, cheating plants benefit from the absence of inter-and intraspecific competitors because pollinators tend to visit all potential resources. In a denser population, a pollinator's optimal foraging strategy involves more selectivity. This would cause between-plant competition for pollinators in a pollinator-limited context, which applies to most hawkmoth-pollinated systems. We propose that nectar-provisioning of plants can be density-dependant, with cheaters able to persist in low density areas.

show abstract

“…Nonetheless, a greater number of flowers might mean a reduction of, or no effect on, the visitation rate of each individual flower (Klinkhamer & Jong 1990;Mitchell et al 2004;Grindeland et al 2005). Likewise, a high density of flowering individuals in an area might lead to enhanced visitation for each due to facilitation (Kunin 1997;Thompson 2001;Moeller 2004;Makino & Sakai 2007;Brys & Jacquemyn 2010;Hegland 2014). Nonetheless, high densities of individuals that overlap in flowering, both in time and space, might cause competition for pollinators, leading to decreased visitation rates per individual (Mustajärvi et al 2001;Sargent & Ackerly 2008;Hegland 2014).…”

Section: Introductionmentioning

confidence: 99%

Breeding system and pollination of Pleroma trichopodum DC. (Melastomataceae): a potential species for the restoration of Atlantic Forest in southern Brazil

2018

View full text Add to dashboard Cite

Plant-pollinator interactions and their reproductive implications are of central importance to the organization of plant populations and communities in restoration areas. We studied the breeding system and flower visitors of Pleroma trichopodum, a pioneer species of the Atlantic Forest. We attempted to answer three questions: (1) Is P. trichopodum dependent on pollinators and mates for reproduction? (2) What are the pollinators of P. trichopodum? (3) Do tree flower-density and flowering-tree density of P. trichopodum enhance the visitation rate of focal trees and their flowers? We tested the breeding system through pollination treatments. We performed focal observations on 10 trees and analyzed the relationship between tree and flower visitation rates, and the tree flower-density and flowering-tree density with Generalized Linear Mixed Models (GLMM). Pleroma trichopodum sets fruits by selfing and outcrossing, both of which occur only through pollinator visits. Bees visited P. trichopodum, and their visitation increased with tree flower-density. Thus, individuals with greater floral displays may function as magnet species, enhancing the pollination of nearby plant species. This characteristic, allied with the ability to reproduce without a mate (selfing) and a tolerance of soggy soils, make P. trichopodum a candidate for Atlantic Forest restoration.

show abstract

Population Size and Density Effects in Pollination: Pollinator Foraging and Plant Reproductive Success in Experimental Arrays of Brassica Kaber

Cited by 397 publications

References 28 publications

Indirect interactions between invasive and native plants via pollinators

Indirect interactions between invasive and native plants via pollinators

Variable responses of hawkmoths to nectar-depleted plants in two native Petunia axillaris (Solanaceae) populations

Breeding system and pollination of Pleroma trichopodum DC. (Melastomataceae): a potential species for the restoration of Atlantic Forest in southern Brazil

Contact Info

Product

Resources

About