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Selection on floral display in insect-pollinated Primula farinosa: effects of vegetation height and litter accumulation

Ågren, Jon ; Fortunel, Claire ; Ehrlén, Johan

Oecologia, 2006-11, Vol.150 (2), p.225-232 [Peer Reviewed Journal]

Berlin: Berlin/Heidelberg : Springer-Verlag

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Title:
Selection on floral display in insect-pollinated Primula farinosa: effects of vegetation height and litter accumulation
Author: Ågren, Jon ; Fortunel, Claire ; Ehrlén, Johan
Subjects: Animal and plant ecology ; Animal, plant and microbial ecology ; Animals ; Biologi ; Biological and medical sciences ; Biology ; biotic interactions ; Feeding Behavior ; flowering ; Flowers ; Flowers - anatomy & histology ; Flowers - growth & development ; Fruit - growth & development ; Fruits ; Fundamental and applied biological sciences. Psychology ; General aspects ; Grazing ; herbivory ; insect pollination ; Insecta ; Insecta - physiology ; Invertebrates ; NATURAL SCIENCES ; NATURVETENSKAP ; Plant Animal Interactions ; plant damage ; Plant litter ; Plant reproduction ; Plants ; Pollen ; Pollen - physiology ; Pollination ; Poultry litter ; Primula ; Primula - anatomy & histology ; Primula - growth & development ; Primula - physiology ; Primula farinosa ; Reproduction ; seed predation ; Seed production ; seed productivity ; Seeds ; Seeds - growth & development ; Vegetation
Is Part Of: Oecologia, 2006-11, Vol.150 (2), p.225-232
Notes: http://dx.doi.org/10.1007/s00442-006-0509-x
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Description: Grazing reduces litter thickness and vegetation height and may thereby indirectly affect reproductive success and selection on floral characters in plants with prostrate growth. Reductions in litter thickness and vegetation height should influence both the resource status of plants with leaves positioned close to the ground and the significance of inflorescence height for interactions with pollinators and seed predators. We experimentally examined how simulated grazing of surrounding vegetation affected pollen limitation, fruit predation and fecundity of short-scaped and long-scaped Primula farinosa, which differ markedly in floral display and therefore in expected attractiveness to pollinators. Litter removal and pruning of surrounding vegetation increased fruit and seed production per plant in the year of the treatment and the probability of flowering in the following year. Pollen limitation of fruit and seed production was stronger in the short-scaped morph than in the long-scaped morph, but was not significantly affected by litter removal and simulated grazing of surrounding vegetation. Supplemental hand-pollination reduced seed size in the year of the treatment and flowering probability in the second year, and these effects did not differ among scape morphs or grazing treatments. The results suggest that grazing indirectly favours seed production in P. farinosa, mainly because it increases the resource status of plants that escape damage. Contrary to expectation, there was no strong evidence that litter accumulation and tall vegetation increase the severity of pollen limitation or reduce the relative performance of the short-scaped morph.
Publisher: Berlin: Berlin/Heidelberg : Springer-Verlag
Language: English

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Selection on floral display in insect-pollinated Primula farinosa: effects of vegetation height and litter accumulation

Ågren, Jon ; Fortunel, Claire ; Ehrlén, Johan

Berlin: Berlin/Heidelberg : Springer-Verlag

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