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Volatility of network indices due to undersampling of intraspecific variation in plantinsect interactions
VerfasserKuppler, Jonas ; Grasegger, Tobias ; Peters, Birte ; Popp, Susanne ; Schlager, Martin ; Junker, Robert R.
Erschienen in
Arthropod-Plant Interactions, Amsterdam, 2017, Jg. 2017, S. 1-6
ErschienenSpringer Netherlands, 2017
SpracheEnglisch
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)Community ecology / Plantpollinator network / Robustness / Specialization
ISSN1872-8847
URNurn:nbn:at:at-ubs:3-3562 Persistent Identifier (URN)
DOI10.1007/s11829-016-9493-1 
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Volatility of network indices due to undersampling of intraspecific variation in plantinsect interactions [1.12 mb]
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Appropriate sampling effort of interaction networks is necessary to extract robust indices describing the structure of species interactions. Here we show that time-invariant variation in the composition and diversity of interaction partners of plant individuals of the same species explains volatility in aggregate network statistics due to undersampling. Within a multi-species pollinatorplant interaction matrix, we replaced the interactions observed on multiple individuals of a single plant species (Sinapis arvensis, pooled interactions) with the plantinsect interactions observed on a single plant individual. In the resampling approach, we considered the interactions of 1 to 84 S. arvensis individuals in different combinations. For each resampled network, several commonly applied aggregated statistics were calculated to test how intraspecific variation affects the properties of a multi-species network. Our results showed that aggregate statistics are sensitive towards qualitative and quantitative intraspecific variation of flowervisitor interactions within a multi-species network, which may affect the ecological interpretation about the properties of a community. These findings challenge the robustness of commonly applied network indices, confirm the urge for a sufficient and representative sampling of interactions, and emphasize the significance of intraspecific variation in the context of communities and networks.

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CC-BY-Lizenz (4.0)Creative Commons Namensnennung 4.0 International Lizenz