Data from: Scale-dependent shifts in the species composition of flower visitors with changing floral density

Essenberg CJ

Date Published: March 5, 2013

DOI: http://dx.doi.org/10.5061/dryad.16v7n

 

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Title Visitation
Downloaded 104 times
Description Per-flowerhead visitation rates to Holocarpha virgata ssp. virgata (Asteraceae) and densities of flower-visiting insects in 2 x 2 m plots spanning the available range of floral densities at a variety of sites and dates within the flowering season
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Title SiteData
Downloaded 62 times
Description Latitude and longitude of the center point of each site used in Visitation.csv and area occupied by summer-flowering plants within 200m of the center of each site. See ReadMe file associated with Visitation.csv for further information.
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Title ObsData
Downloaded 60 times
Description Dates of each observation recorded in Visitation.csv along with average H. virgata floral densities within H. virgata patches and average densities of floral resources within patches of all summer-flowering species observed within 200m of the center of each site during each observation. See ReadMe file associated with Visitation.csv for further information.
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Title Nectar
Downloaded 69 times
Description Total nectar sugar produced by H. virgata flowerheads in 1 x 1 m plots of varying floral densities at the sites and dates used in Visitation.csv. Flowerheads were bagged in the morning before insects became active and nectar measured in the late morning or early afternoon, after the conclusion of flower visitation observations. See ReadMe file associated with Visitation.csv for more information.
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Title NectarTiming
Downloaded 56 times
Description Total nectar sugar measured in 11 bagged flowerheads of H. virgata at multiple points throughout a single day, August 22, 2010. Flowerheads were bagged before pollinators became active in the morning. At each measurement point, the flowerhead was emptied of nectar. See ReadMe file associated with Visitation.csv for further information.
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Title Pollen
Downloaded 61 times
Description Pollen produced by H. virgata flowerheads in the 1 x 1 m plots also used for nectar measurements. Flowerheads were collected in the morning before insects became active. See ReadMe file associated with Visitation.csv for further information.
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Title HandlingTimes
Downloaded 50 times
Description Flower handling times recorded during the flower visitation observations described above (and reported in Visitation.csv). See ReadMe file associated with Visitation.csv for further information.
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Title SearchSpeeds
Downloaded 41 times
Description Search speeds calculated from flight times and estimated distances between flowerheads, in 2009 (the summer before the rest of the data in this dataset were collected), for the main visitors to H. virgata. See ReadMe file associated with Visitation.csv for further information.
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Title BodySize
Downloaded 55 times
Description Intertegular spans of each of the four most common flower visitors to H. virgata. See ReadMe file associated with Visitation.csv for further information.
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When using this data, please cite the original publication:

Essenberg CJ (2012) Scale-dependent shifts in the species composition of flower visitors with changing floral density. Oecologia 171(1):187-96. http://dx.doi.org/10.1007/s00442-012-2391-z

Additionally, please cite the Dryad data package:

Essenberg CJ (2012) Data from: Scale-dependent shifts in the species composition of flower visitors with changing floral density. Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.16v7n
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