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Space, time and aliens: charting the dynamic structure of Galápagos pollination networks.

Traveset A, Chamorro S, Olesen JM, Heleno R - AoB Plants (2015)

Bottom Line: We found that the pollination network structure was rather consistent between the two islands, but differed across habitats and seasons.It is thus likely that, in spite of the overall weak effect we found of alien plant invasion on pollination network structure, these introduced species influence the reproductive success of native ones, and by doing so, they affect the functioning of the community.This certainly deserves further investigation.

View Article: PubMed Central - PubMed

Affiliation: Laboratorio Internacional de Cambio Global (LINC-Global), Institut Mediterrani d'Estudis Avançats (CSIC-UIB), C/Miquel Marqués 21, 07190-Esporles, Mallorca, Balearic Islands, Spain atraveset@imedea.csic-uib.es.

No MeSH data available.


The mean (±1 SE) of the network parameters for each island, habitat and season. Data are from 2010. Only parameters that showed significant differences are shown. For each island and season, bars with the same letter indicate no differences across habitats (P > 0.05).
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PLV068F2: The mean (±1 SE) of the network parameters for each island, habitat and season. Data are from 2010. Only parameters that showed significant differences are shown. For each island and season, bars with the same letter indicate no differences across habitats (P > 0.05).

Mentions: Data from 2010 showed that species richness was somewhat higher in Santa Cruz than in San Cristóbal (Table 2), although differences were not significant (χ2 = 18.26, d.f. = 3, P < 0.001) (Fig. 2). There were significant differences among habitats in the number of species in the network (χ2 = 27.17, d.f. = 4, P < 0.001), arid zone showing higher number than either the transition or the humid zone, which did not differ from each other (Fig. 2). A significant interaction between island and habitat was found (χ2 = 12.74, d.f. = 2, P < 0.01), as differences among habitats were not consistent between Santa Cruz and San Cristóbal (Fig. 2). On both islands, networks were larger in the hot/rainy season, when most flowers are in bloom and more insects are flying, than in the cold season (χ2 = 95.91, d.f. = 1, P < 0.001). The level of plant invasion showed no effect on species richness (χ2 = 0.52, d.f. = 1, P = 0.47) and was not included in the best model.Table 2.


Space, time and aliens: charting the dynamic structure of Galápagos pollination networks.

Traveset A, Chamorro S, Olesen JM, Heleno R - AoB Plants (2015)

The mean (±1 SE) of the network parameters for each island, habitat and season. Data are from 2010. Only parameters that showed significant differences are shown. For each island and season, bars with the same letter indicate no differences across habitats (P > 0.05).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4522039&req=5

PLV068F2: The mean (±1 SE) of the network parameters for each island, habitat and season. Data are from 2010. Only parameters that showed significant differences are shown. For each island and season, bars with the same letter indicate no differences across habitats (P > 0.05).
Mentions: Data from 2010 showed that species richness was somewhat higher in Santa Cruz than in San Cristóbal (Table 2), although differences were not significant (χ2 = 18.26, d.f. = 3, P < 0.001) (Fig. 2). There were significant differences among habitats in the number of species in the network (χ2 = 27.17, d.f. = 4, P < 0.001), arid zone showing higher number than either the transition or the humid zone, which did not differ from each other (Fig. 2). A significant interaction between island and habitat was found (χ2 = 12.74, d.f. = 2, P < 0.01), as differences among habitats were not consistent between Santa Cruz and San Cristóbal (Fig. 2). On both islands, networks were larger in the hot/rainy season, when most flowers are in bloom and more insects are flying, than in the cold season (χ2 = 95.91, d.f. = 1, P < 0.001). The level of plant invasion showed no effect on species richness (χ2 = 0.52, d.f. = 1, P = 0.47) and was not included in the best model.Table 2.

Bottom Line: We found that the pollination network structure was rather consistent between the two islands, but differed across habitats and seasons.It is thus likely that, in spite of the overall weak effect we found of alien plant invasion on pollination network structure, these introduced species influence the reproductive success of native ones, and by doing so, they affect the functioning of the community.This certainly deserves further investigation.

View Article: PubMed Central - PubMed

Affiliation: Laboratorio Internacional de Cambio Global (LINC-Global), Institut Mediterrani d'Estudis Avançats (CSIC-UIB), C/Miquel Marqués 21, 07190-Esporles, Mallorca, Balearic Islands, Spain atraveset@imedea.csic-uib.es.

No MeSH data available.