Data from: Population growth and sequestration of plant toxins along a gradient of specialization in four aphid species on the common milkweed Asclepias syriaca

Züst T, Agrawal AA

Date Published: July 21, 2015

DOI: http://dx.doi.org/10.5061/dryad.35nn0

 

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Title Sequential aphid population census data
Downloaded 11 times
Description Tab-delimited file containing aphid census data on 20 plant genotypes. Each replicate plant is identified by a unique numeric code ('ID') to indicate repeated measures. 'Chamber' refers to one of two growth chambers. 'Census' refers to the five sequential censuses, while 'Growth.days' is the number of days since aphid introduction. Aphid numbers are given as 'Juvenile', 'Apterous' (unwinged adult), 'Alate' (winged adult), and the summed total.
Download Züst and Agrawal (2015)_Aphid data.txt (56.50 Kb)
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Title Sequential plant size data
Downloaded 5 times
Description Tab-delimited file containing repeated plant size measurements of 20 plant genotypes. Each replicate plant is identified by a unique numeric code ('ID') to indicate repeated measures. 'Chamber' refers to one of two growth chambers. 'Census' refers to the five sequential censuses, while 'Age' is the number of days since planting. 'Age.aph.int' is the plant age at time of aphid introduction (variation is due to some differences in day of planting). Plant size is given by the number of leaves, the number of stem nodes, and the plant height [cm].
Download Züst and Agrawal (2015)_Plant data.txt (116.1 Kb)
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Title Chemistry data
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Description Tab-delimited file containing chemistry data of plant (Sample.type = Pl), aphid (Sample.type = Aph), and honeydew (Sample.type = Hd) samples. 'Chamber' refers to one of two growth chambers. For a subset of plant samples, the foliar C:N ratio is given in column 'C.N'. All columns headed with cX.X are individual cardenolide compounds [ng/mg sample], with X.X referring to their HPLC retention time.
Download Züst and Agrawal (2015)_Chemistry data.txt (127.6 Kb)
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Title Honeydew exudation data
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Description Tab-delimited file containing honeydew weights on all 20 plant genotypes and number of aphids present during time of collection. 'Aphid.start' and 'Aphid.end' are actual numbers of aphids present at the beginning and end of honeydew collection, while 'Exposure.time' indicates the duration of collection in days. Columns headed 'day1' through 'day5' are predicted aphid numbers based on linearly integrating start and end censuses, and 'Cumulative.aphids' is the sum of predicted aphids present throughout honeydew collection.
Download Züst and Agrawal (2015)_Honeydew data.txt (18.92 Kb)
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Title Genotype trait means
Downloaded 3 times
Description Tab-delimited file containing trait means for all 20 plant genotypes and aphid growth on these plants (RGR.an = A. nerii, RGR.mp = M.persicae, RGR.ma = M. asclepiadis). Plant traits include C:N ratio (C.N), absolute growth rate at time of aphid introduction (Plant.AGR) and total (Card.tot) cardenolide concentration [ng/mg]. In addition, the average sum of the four most polar (Card.pol) or six most apolar (Card.apo) cardenolides is given.
Download Züst and Agrawal (2015)_Genotype means.txt (1.7 Kb)
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Title Complete R code for Züst and Agrawal (2015)
Downloaded 28 times
Description R code to recreate all analyses in Züst and Agrawal (2015), separated into sections 'aphid population growth', 'plant growth', 'honeydew exudation', 'chemistry means' and 'trait correlations', with each section requiring its own data file provided on Dryad.
Download Züst and Agrawal (2015)_Rcode.r (23.08 Kb)
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When using this data, please cite the original publication:

Züst T, Agrawal AA (2016) Population growth and sequestration of plant toxins along a gradient of specialization in four aphid species on the common milkweed Asclepias syriaca. Functional Ecology 30(4): 547–556. http://dx.doi.org/10.1111/1365-2435.12523

Additionally, please cite the Dryad data package:

Züst T, Agrawal AA (2015) Data from: Population growth and sequestration of plant toxins along a gradient of specialization in four aphid species on the common milkweed Asclepias syriaca. Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.35nn0
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