English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/188303
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Beta diversity and specialization in plant–pollinator networks along an elevational gradient

AuthorsLara-Romero, Carlos; Seguí, Jaume; Pérez-Delgado, Antonio; Nogales, Manuel ; Traveset, Anna
KeywordsClimate change
Pollination networks
Niche breadth
Functional diversity
Issue Date4-Jun-2019
PublisherJohn Wiley & Sons
CitationJournal of Biogeography 46(7): 1598-1610 (2019)
Abstract[Aim] To assess whether the reduced nutritional resources available for pollinators due to plant community simplification along an elevational plant-diversity gradient changes pollinator niche breadth and richness. Additionally, we evaluated how body size and proboscis length of pollinators shifted along the gradient, and whether these changes were related to pollinator niche breadth, [Location] An elevational gradient (2,350–3,520 m a.s.l.) on the oceanic high-mountain strato-volcano of El Teide (Tenerife, Canary Islands), [Taxon] Flowering plant and pollinator species, [Methods] We compared quantitative plant–pollinator networks along the plant-diversity gradient. We calculated a set of niche-based topological metrics that capture the degree of specialization, niche breadth and niche overlap. Furthermore, we obtained β-diversity measures and the proportion of replacement and richness components, [Results] There was an overall decline in species richness of pollinators with increasing elevation. This decline was mainly driven by the loss of species along the elevational gradient, which conformed a nested subset pattern. The whole network showed less specialization, greater connectance and lower modularity towards the summit. At high elevations, pollinators were more generalized and less selective in their flower choice, showing a greater trophic niche breadth compared to pollinators at lower elevations. Mean body size of pollinators increased with elevation, and species body size and proboscis length were positively associated with the number of plant species visited, [Main conclusions] Overall, results indicated that the elevational gradient filters pollinator species, probably according to their thermal tolerance and ability to exploit a wide range of trophic resources. The finding that pollinators become more generalized and opportunistic at higher elevations is a novel result, which may have implications for new research into how ecological networks vary over environmental gradients. From an applied perspective, our results highlight the importance of considering the spatial variation of species assemblages when aiming to construct functionally reliable interaction networks along environmental gradients.
Publisher version (URL)https://onlinelibrary.wiley.com/doi/10.1111/jbi.13615
Identifiersdoi: 10.1111/jbi.13615
e-issn: 1365-2699
issn: 0305-0270
Appears in Collections:(IMEDEA) Artículos
(IPNA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.