Yearly fluctuations of flower landscape in a Mediterranean scrubland : consequences for floral resource availability
Flo Sierra, Víctor (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Bosch, Jordi, 1961- (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Arnan, Xavier (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Primante, Clara (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Martín González, Ana M. (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Barril-Graells, Helena (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Rodrigo Domínguez, Anselm (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2018
Resum:	Species flower production and flowering phenology vary from year to year due to extrinsic factors. Inter-annual variability in flowering patterns may have important consequences for attractiveness to pollinators, and ultimately, plant reproductive output. To understand the consequences of flowering pattern variability, a community approach is necessary because pollinator flower choice is highly dependent on flower context. Our objectives were: 1) To quantify yearly variability in flower density and phenology; 2) To evaluate whether changes in flowering patterns result in significant changes in pollen/nectar composition. We monitored weekly flowering patterns in a Mediterranean scrubland community (23 species) over 8 years. Floral resource availability was estimated based on field measures of pollen and nectar production per flower. We analysed inter-annual variation in flowering phenology(duration and date of peak bloom) and flower production, and inter-annual and monthly variability in flower, pollen and nectar species composition. We also investigated potential phylogenetic effects on inter-annual variability of flowering patterns. We found dramatic variation in yearly flower production both at the species and community levels. There was also substantial variation in flowering phenology. Importantly, yearly fluctuations were far from synchronous across species, and resulted in significant changes in floral resources availability and composition at the community level. Changes were especially pronounced late in the season, at a time when flowers are scarce and pollinator visitation rates are particularly high. We discuss the consequences of our findings for pollinator visitation and plant reproductive success in the current scenario of climate change.
Ajuts:	Ministerio de Ciencia e Innovación CGL2005-00491 Ministerio de Ciencia e Innovación CSD2008-0040 Ministerio de Ciencia e Innovación CGL2009-12646
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Flowers ; Pollen ; Flowering plants ; Phylogenetics ; Foraging ; Plants ; Seasons ; Species interactions
Publicat a:	PloS one, Vol. 13, issue 1 (Jan. 2018) , art. e0191268, ISSN 1932-6203

DOI: 10.1371/journal.pone.0191268
PMID: 29346453

14 p, 1.7 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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