Explaining variation in plant-herbivore associational effects in a tree biodiversity experiment

# Data for the publication "Explaining variation in plant-herbivore associational effects in a tree biodiversity experiment" These datasets may be accessed on Dryad at https://doi.org/10.5061/dryad.9kd51c5pv These datasets were collected in 2016 and 2021, and used in the manuscript “Explaining variation in plant-herbivore associational effects in a tree biodiversity experiment”. The datasets contain information on insect herbivory, leaf traits, and plant size. Methods for data collection can be found in the manuscript and supporting information. The datasets "mydiv\_herbivory\_may\_2021.csv" contains the data on herbivory in May, 2021 due to different functional groups. The columns contain the following information: * "Plot": the plot number, the mycorrhizal treatment (E for ecto, A for arbuscular, and AE for mixed), and the diversity level * "tree.species": the binomial nomenclature for each tree species * "Indiv": the tree individual of a given species within the plot -- either 1, 2, or 3, as there were three replicate tree individuals per species per plot * "Position": the position within the 12x12 grid of each plot, with the letter giving one coordinate and the number the other * "Leaf": The leaf on the tree individual; there are 15 leaves per individual * "Chewer", "Holefeeder", "Miner", "Galler", "Roller", "Sucking", "Skeletonizer", "Rust", "Mildew", "Dasineura-like galls": In each of these columns, we denote the presence (1) or absence (0) of a different kind of leaf damage: leaf chewer, holefeeders, leaf miners, gallers, leaf rollers, leaf suckers, skeletonizers, rust, mildew, or dasinuera-like galls. Further descriptions of different types of herbivore damage are provided in the manuscript. * "plot\_sp\_position": simply the plot, tree.species, and position columns pasted together, giving a unique ID for each tree individual The dataset "mydiv\_herbivory\_aug\_2021.csv" contains the data on herbivory in August, 2021, both due to different functional groups and a quantitative metric per leaf. The columns contain the following information: * "plot": the plot number * "species": the binomial nomenclature for each tree species * "branch": the branch of the tree on which leaves were sampled; leaves were sampled on three branches per tree * "position": the position within the 12x12 grid of each plot, with the letter giving one coordinate and the number the other * "Leaf": The leaf on the tree individual; there are 15 leaves per individual * "chewer", "holefeeder", "miner", "galls", "roller", "skeletonizer", "rust", "mildew": In each of these columns, we denote the presence (1) or absence (0) of a different kind of leaf damage: leaf chewer, holefeeders, leaf miners, gallers, leaf rollers, skeletonizers, rust, or mildewFurther descriptions of different types of herbivore damage are provided in the manuscript. * "index": the quantitative herbivory index for each leaf (descriptions of categories are provided in the manuscript) * "my": the mycorrhizal type of the plot * "div": the diversity level of the plot * "perc\_mean": the median of the range of herbivory values corresponding to the index * "block": the block of the experiment The dataset "mini\_mydiv\_herbivory.csv" contains the data on herbivory in the miniMyDiv experiment in September, 2016. The columns contain the following information: * "Plot": the plot number/name, the diversity level, and the mycorrhizal treatment * "species": the binomial nomenclature for each species * "Indiv": the tree individual for a given species within the plot * "Leaf": the leaf per individual * "Chewer", "Holefeeder", "Miner", "Galler", "Roller", "Sucking", "Skeletonizer", "Rust", "Mildew" The dataset "sem\_14.csv" contains the data on leaf traits sampled in July and August, 2021. Only data from diversity levels 1 and 4 are included, as palatability data was only collected at this level. The columns contain the following information: * "Plot": the plot number * "species": The binomial nomenclature for each species * "position": the position of the tree within the plot * "pubesc.sum": a pubescence index for each leaf, calculated by summing the pubescence on the abaxial and adaxial sides * "toughness.avg": the average leaf toughness measurement across leaves for a given tree * "palat\_ind": the average palatability index across leaves within a tree The dataset "sem\_nopalat.csv" contains the data on leaf traits sampled in July and August, 2021, but without palatability data. However, it contains leaf trait data for all diversity levels. The columns contain the following information: * "id": the plot number, species, and position within the plot * "pubesc.sum": a pubescence index for each leaf, calculated by summing the pubescence on the abaxial and adaxial sides * "toughness.avg": the average leaf toughness measurement across leaves for a given tree * "species": the binomial nomenclature for each species * "plot": the plot number * "position": the tree individual position within the plot The dataset "tree\_inventory\_2021.csv" contains the data on tree size from 2021. The columns contain the following information: * "plot": the plot number * "position": the tree individual position within the plot * "species": the binomial nomenclature for each tree species * "dbh": diameter at breast height of each individual * "height": tree height * "id": a unique id for each tree individual, made up of the plot number, species, and position pasted together