Effects of pollen quality and quantity on pollen limitation in Crataegus monogyna (Rosaceae) in NW Spain

Chacoff, Natacha P.; García, Daniel; Obeso, José Ramón

doi:10.1016/j.flora.2007.08.005

Cited by 26 publications

(21 citation statements)

References 43 publications

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“…It is certain that both adequate fertile pollen and pollinators are essential to produce seeds. Our observations indicated that very few seeds were produced when M. coriacea flowers were caged, demonstrating that selfing could take place without insect vectors, but did so very infrequently (similar findings: Chacoff et al, 2008). Hand pollination could significantly improve seed set over that from open-pollinated flowers (Po0.01).…”

Section: Discussionsupporting

confidence: 76%

“…It is well known that plants rely on vectors transferring pollen to their stigmas for fertilization. It could be that in fragmented populations plant-pollinator interactions may become disrupted and reproduction may be reduced because of insufficient pollination (AEgisdó ttir et al, 2007;Chacoff et al, 2008;Colling et al, 2004;Kearns et al, 1998;Moody-Weis and Heywood, 2001). Plants in small populations are often less attractive to pollinators and may be visited less frequently (Rathcke and Jules, 1993).…”

Section: Discussionmentioning

confidence: 99%

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Abnormalities in sexual development and pollinator limitation in Michelia coriacea (Magnoliaceae), a critically endangered endemic to Southeast Yunnan, China

Zhao¹,

Sun²

2009

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Abnormalities in sexual development and pollinator limitation in Michelia coriacea (Magnoliaceae), a critically endangered endemic to Southeast Yunnan, China

Zhao¹,

Sun²

2009

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…Therefore, seed abortion is the main mechanism of post-zygotic selection in plants, allowing resource allocation to be optimized and pre-dispersal seed predation to be avoided (Gribel & Gibbs 2002;Ward et al 2005;Chacoff et al 2008;Ghazoul & Satake 2009).…”

Section: Introductionmentioning

confidence: 99%

Pre-dispersal seed predation and abortion in species of Callisthene and Qualea (Vochysiaceae) in a Neotropical savanna

et al. 2014

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The ability of plants to generate fertile offspring is influenced by morpho-physiological and ecological factors. Hence, reproductive success is directly linked to factors affecting quantity and quality of their progeny. In the Cerrado (savanna) of Brazil, the Vochysiaceae is a widely distributed and ecologically important family. Factors affecting pre-dispersal seed predation and abortion were studied for populations of Callisthene fasciculata, C. major, Qualea multiflora and Q. parviflora. To characterize differences between genera, as well as among species, study areas, and individuals, we quantified pre-dispersal seed predation and abortion. Differences of seed abortion among the species were related to intrinsic reproductive features and not to area or other factors. In contrast, seed predation varied not only among species but also among areas and among individuals. Only C. fasciculata showed no seed predation. In Qualea species, insect predators were found inside the seeds; whereas predators of Callisthene species were outside seeds. In both genera, seed abortion correlated negatively with area size, as did pre-dispersal seed predation, which suggest seed abortion may be a counter-measure to avoid predation. Although seed abortion and predation reduced the progenies of the studied species, seed production did not differ from other Cerrado species.

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“…Many species are well known according to their body-colour pattern showing mimicry of wasps and bees. Hoverflies have considerable importance in natural and agricultural ecosystems, providing crucial ecosystem services: on the one hand adult hoverflies feed on pollen, nectar or both (Rossi et al 2006), pollinating wild flowers and flowering crops, including several fruit trees (Röder 1990;Chacoff 2008;van Rossum 2010). On the other hand more than 30% of Palaearctic syrphid flies are known as aphid predators, i.e.…”

Section: Introductionmentioning

confidence: 99%

Hoverfly (Diptera: Syrphidae) community of a cultivated arable field and the adjacent hedgerow near Debrecen, Hungary

Földesi

Kovács‐Hostyánszki

2014

Biologia

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A hoverfly (Syrphidae) community was investigated in a cultivated wheat field and the adjacent hedgerow near Debrecen (Hungary). We monitored the change of species richness and abundance of hoverflies along three transects in the hedgerow and in the wheat field in different distances (10 m, 20 m) from the hedgerow. The effect of sampling methods on the number of hoverfly species and individuals was analyzed. Two sampling methods were used to catch hoverflies: netting and pan traps. The whole sampling period was divided into three subperiods, which are early (22 nd April -2 nd June), middle (11 th June -1 st August) and late (6 th August -11 th September). Altogether 1,214 individuals of 22 species were sampled. Fourteen species with 78% of individuals belonged to the aphidophagous group, feeding on aphids as larvae. Altogether 861 individuals of 22 hoverfly species were sampled by netting and 353 individuals of 10 species by pan traps. The total number of hoverfly species was significant lower in the late period than in the early. The total abundance was higher in the middle period compared to the early. The species richness and abundance of aphidophagous species followed a similar pattern as the total species values. The species richness and abundance of hoverflies were significant higher in 10 m and 20 m distance in the wheat field than along the hedgerow. The results suggest that the pan traps were less efficient in the hedgerow than the netting, but in the wheat field they sampled more hoverflies because of visually alluring effect on hoverflies in the absence of flowers.

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Effects of pollen quality and quantity on pollen limitation in Crataegus monogyna (Rosaceae) in NW Spain

Cited by 26 publications

References 43 publications

Abnormalities in sexual development and pollinator limitation in Michelia coriacea (Magnoliaceae), a critically endangered endemic to Southeast Yunnan, China

Abnormalities in sexual development and pollinator limitation in Michelia coriacea (Magnoliaceae), a critically endangered endemic to Southeast Yunnan, China

Pre-dispersal seed predation and abortion in species of Callisthene and Qualea (Vochysiaceae) in a Neotropical savanna

Hoverfly (Diptera: Syrphidae) community of a cultivated arable field and the adjacent hedgerow near Debrecen, Hungary

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