Reproductive success of the endangered shrub Buxus balearica Lam. (Buxaceae): pollen limitation, and inbreeding and outbreeding depression

Lázaro, Amparo; Traveset, Anna

doi:10.1007/s00606-005-0404-2

Cited by 11 publications

(14 citation statements)

References 40 publications

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“…The relationship between Xower density and pollen limitation has most commonly been studied at the among-population level and has concerned only conspeciWc Xower density. Most of these studies have found a negative relationship between conspeciWc density and the magnitude of pollen limitation (Steven et al 1999;Karrenberg and Jensen 2000;Moody-Weis and Heywood 2001;Knight 2003;Waites and Ågren 2004;Kolb 2005), although positive relationships (Larson and Barrett 1999;Baker et al 2000) and nonsigniWcant relationships (Lázaro and Traveset 2006) also occur. Few studies have investigated the relationship between local Xower density and pollen limitation among individuals within the same population (but see de Jong et al 2005;Wagenius 2006;Zorn-Arnold and Howe 2007), and we know of no study that also has assessed the eVects of heterospeciWc Xower density on individual-level pollen limitation.…”

Section: Introductionmentioning

confidence: 92%

Relationships between the floral neighborhood and individual pollen limitation in two self-incompatible herbs

2009

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Local flower density can affect pollen limitation and plant reproductive success through changes in pollinator visitation and availability of compatible pollen. Many studies have investigated the relationship between conspecific density and pollen limitation among populations, but less is known about within-population relationships and the effect of heterospecific flower density. In addition, few studies have explicitly assessed how the spatial scales at which flowers are monitored affect relationships. We investigated the effect of floral neighborhood on pollen limitation at four spatial scales in the self-incompatible herbs Armeria maritima spp. maritima and Ranunculus acris spp. acris. Moreover, we measured pollen deposition in Armeria and pollinator visits to Ranunculus. There was substantial variation in pollen limitation among Armeria individuals, and 25% of this variation was explained by the density of compatible and heterospecific flowers within a 3 m circle. Deposition of compatible pollen was affected by the density of compatible and incompatible inflorescences within a 0.5 m circle, and deposition of heterospecific pollen was affected by the density of heterospecific flowers within a 2 m circle. In Ranunculus, the number of pollinator visits was affected by both conspecific and heterospecific flower densities. This did not, however, result in effects of the floral neighborhood on pollen limitation, probably due to an absence of pollen limitation at the population level. Our study shows that considerable variation in pollen limitation may occur among individuals of a population, and that this variation is partly explained by floral neighborhood density. Such individual-based measures provide an important link between pollen limitation theory, which predicts ecological and evolutionary causes and consequences for individual plants, and studies of the effects of landscape fragmentation on plant species persistence. Our study also highlights the importance of considering multiple spatial scales to understand the spatial extent of pollination processes within a population.

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Section: Introductionmentioning

confidence: 92%

Relationships between the floral neighborhood and individual pollen limitation in two self-incompatible herbs

2009

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“…For example, valuable data are available about vegetation dynamic and secondary succession after forest fragmentation and abandonment (Crespi et al 2005;Pueyo and Alados 2007), patterns of species richness and composition in human disturbed-areas (Chust et al 2006;Guirado et al 2006Guirado et al , 2007, quantiWcation of land-use change in time (Alados et al 2004;Plieninger 2006), genetic structuring of populations in fragmented landscapes (López-Pujol et al 2003;Robledo-Arnuncio et al 2005;Jump and Peñuelas 2006), regeneration of populations (Jordano et al 2007), disruption of plant-animal interactions in heterogeneous habitats García and ChacoV 2007), and reproductive biology of species (Lázaro and Traveset 2006).…”

Section: Introductionmentioning

confidence: 99%

Descriptive analysis of the ‘relictual’ Mediterranean landscape in the Guadalquivir River valley (southern Spain): a baseline for scientific research and the development of conservation action plans

Aparicio

2007

Biodivers Conserv

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Landscape fragmentation is ancient and severe in the countryside of the Guadalquivir river valley (Western Andalusia, Southern Spain). BIANDOCC is a project that aims to inventory all the forest patches embedded in this anthropogenic area to record quantitative, qualitative, and descriptive information about management, conservation status, vegetation physiognomy and Xoristic richness. We have characterized a 'relictual' landscape (t1% of habitat retention) where nearly 70% of the patches (N = 535) are owned by private landowners who manage them to harvest pine nuts, cork, and Wrewood, for coal making, cattle raising, and to a lesser extent, beekeeping and agriculture. The publicly owned patches are intensively used for recreation. As a consequence, the vegetation physiognomy and conservation status in most forest stands is impoverished, with low shrub diversity and coverage and none or very low natural tree regeneration. Furthermore, patch size, connectedness and patch fractal dimension (i.e. microhabitat diversity) are all very low. However, the botanic richness is worth mentioning: 1,032 plant taxa have been identiWed, of which 70 are catalogued in an oYcial red list, 39 are relevant chorological novelties, and one was newly described for science. Therefore, and interestingly, the remnant forest patches in the studied area can be regarded as relevant biodiversity reservoirs. The project reported here constitutes an important baseline for developing true conservation action plans and provides an opportunity to address the potential ecological and biological eVects of fragmentation to plant genes, species, populations and communities, at the regional scale of the study, which are enhanced by the emergent landscape genetics and landscape ecology analytical tools.

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“…Habitat loss, fragmentation and the consequent loss of biodiversity are the main environmental impacts of human activities (Primm & Raven 2000). Such impacts may increase pollination failure as both pollen quantity and quality often decrease as populations become isolated (Lazaro & Traveset 2006, Alonso et al 2013, Suarez-Gonzales & Good 2014. The susceptibility of a plant species to habitat fragmentation is related to its reproductive biology, which refl ects its degree of dependence on pollinators (Liu & Koptur 2003, Aguilar et al 2006, Warzecha et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Reproductive ecology of two pioneer legumes in a coastal plain degraded by sand mining

Fidalgo

Guimarães

Caldiron

et al. 2018

Hoehnea

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The present study evaluates and compares the phenology, pollination biology and breeding systems of Chamaecrista desvauxii (Collad.) Killip.and Clitoria laurifolia Poir. in a coastal plain degraded by sand mining in São Paulo State, Brazil, from January 2006 to May 2008. Flowering and fruiting events occurred in the warm and rainy season. Both species are self-compatible but only C. desvauxii was pollinator-dependent to set fruits. A small group of bees, comprising Eufrisea sp., Eulaema (Apeulaema) cingulata and Bombus morio, accessed the male and female floral structures and moved among individuals resulting in cross-pollinations. However, only B. morio was a frequent visitor and an effective pollinator. Although recruitment and survival of population in the study area are high for both species, we observed lower abundance and richness of visitors suggesting the possible lack of pollinators and pollen limitation.

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Reproductive success of the endangered shrub Buxus balearica Lam. (Buxaceae): pollen limitation, and inbreeding and outbreeding depression

Cited by 11 publications

References 40 publications

Relationships between the floral neighborhood and individual pollen limitation in two self-incompatible herbs

Relationships between the floral neighborhood and individual pollen limitation in two self-incompatible herbs

Descriptive analysis of the ‘relictual’ Mediterranean landscape in the Guadalquivir River valley (southern Spain): a baseline for scientific research and the development of conservation action plans

Reproductive ecology of two pioneer legumes in a coastal plain degraded by sand mining

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