Data for Schuldt et al. 2015: Early positive effects of tree species richness on herbivory in a large-scale forest biodiversity experiment influence tree growth (Journal of Ecology)

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Dataset Abstract

This dataset accompagnies the paper by Schuldt et al. 2015: Early positive effects of tree species richness on herbivory in a large-scale forest biodiversity experiment influence tree growth. Journal of Ecology

Dataset Design

The herbivory assessments were conducted at the end of the main growing season in September and October 2011 (Site A) and 2012 (Site B). In each plot, the central 6 x 6 (= 36) tree individuals were monitored for herbivore damage. On each tree, seven leaves on three randomly selected branches from different parts of the canopy (= 21 leaves per tree) were visually inspected. Herbivory was quantified as the overall leaf damage caused by chewing, mining, galling and (if visible) sucking insects per leaf. We used predefined percentage classes (estimated as 0%, 75%), and the mean values per class averaged over the 21 leaves per tree individual are reported here. As additional data, the height of each tree at the time of the herbivory measurements was recorded. Tree height and ground diameter as growth parameters were measured in separate campaigns in October 2010 and 2011 (Site A) and in October 2011 and 2012 (Site B), i.e. both one year before and in the same year as the herbivory census. Tree height on all planting positions included in the herbivory assessment (i.e. at 36 positions per plot) was measured as the total length of a tree from the stem base to the apical meristem (in cm), ground diameter as the stem diameter 5 cm above the ground (to the nearest millimeter).

Spatial Extent

Main Experiment

Temporal Extent

Fall 2010 - Fall 2012

Data columns available in the raw data part of this dataset

plot_unique
Unique identifier for the plot: cobines information of Site as well as plot within the respective Site. For example Plot F7 at Site A is named AF7.
Data group: Helper
Keywords: location
Values
AB35
AB34
AB38/C38
AC31
AB36/C36
* Eichenberg, D. also contributed to this column.
plot
Study plot
Data group: Plot name Main experiment (letter, number code)
Keywords: location
Values
B35
B38/C38
B36/C36
B34
C27
species
Scientific name of the respective species accoring to the Flora of China
Data group: Scientific plant species name
Keywords: species, taxonomy, species name
Values
Acer davidii
Ailanthus altissima
Castanea henryi
Alniphyllum fortunei
Betula luminifera
site
Experimental site of the main experiment, where the respective tree has been investigated. Is one constituent of the column "plot_unique" within this dataset.
Data group: Experimental Site
Keywords: Site
Values
A
B
height
Tree height as a size parameter measured with herbivory; Datagroup description: Tree height
Unit: centimeter
Data group: Plant height
Keywords: height
Values
100
1
101
10
102
herbivory
Mean percent leaf damage per tree, averaged over all leaves
Unit: percent
Data group: Herbivore damage
Keywords: leaf, herbivory, response
Values
0.095238095
0
0.05
0.0625
0.071428571
height_1
Mean tree height per species and plot, measured one year before the herbivory measurements; Datagroup description: Mean tree height
Unit: centimeter
Data group: Plant height
Keywords: height
Values
101
100.5
101.125
100
100.3333333
gd_1
Mean stem ground diameter ( 5 cm aboveground ) per species and plot, measured one year before the herbivory measurements; Datagroup description: Mean stem ground diameter
Unit: centimeter
Data group: Basal diameter
Keywords: diameter
Values
0.366666667
0.333333333
0.3
0.2
0.4
height_2
Mean tree height per species and plot, measured in the year of the herbivory measurements; Datagroup description: Mean tree height
Unit: centimeter
Data group: Plant height
Keywords: height
Values
100.5
101
100
101.6666667
10
gd_2
Mean stem ground diameter ( 5 cm aboveground ) per species and plot, measured in the same year as the herbivory measurements; Datagroup description: Mean stem ground diameter
Unit: centimeter
Data group: Basal diameter
Keywords: diameter
Values
0.1
0.2
0.133333333
0.15
0.223333333