Main Experiment: Trophobioses data site A 2011

Usage Rights

This data is Free for public.

This dataset can be used by any interested individual as long as the original publication is properly cited:

Staab, M., Blüthgen, N. & Klein, A.M. (2015): Tree diversity alters the structure of a tri-trophic network in a biodiversity experiment. Oikos 124: 827-834. doi: 10.1111/oik.01723.

Permission is granted to anybody to access, use and publish all open for public data freely. The commercial use of any data is prohibited. The quality and completeness of data cannot be guaranteed. Users employ these data at their own risk. In order to make attribution of use for owners of the data possible, the identifier of ownership of data must be retained with every data record. Users must publicly acknowledge, in conjunction with the use of the data, the data owners.

Cite the data as follows:

Klein, A., Staab, M., and Blüthgen, N. (2016): Main Experiment: Trophobioses data site A 2011. (Accessed through URL: http://china.befdata.biow.uni-leipzig.de/datasets/488)

Dataset Abstract

We sampled trophobioses from 21 May to 20 August 2011 on site A. We selected in total 146 plots from tree diversity level 1, 2, 4, 8 and 16. Because there are only two plots with tree diversity 24, we did not study the highest available tree diversity level. As the abundance of a tree species in a plot decreases with increasing tree diversity, we increased the number of sampled trees per plot accordingly, summing up to a total of 10 359 trees which were sampled once each. On each tree, 20 randomly selected young leaves and the attached branch sections were visually inspected for the occurrence of sap-sucking Hemiptera and honeydew-collecting ants. Voucher specimens of each trophobiosis were collected with soft insect forceps and stored in 70% ethanol. In total, we found 194 independent trophobioses in 53 plots. Hemiptera were grouped into morphospecies and sent to taxonomic experts for further identification. Ants were first assorted to genera with Bolton (1994) and then identified to species level whenever possible with primary taxonomic literature and the Antweb Database (www.antweb.org). In a few cases Hemiptera and ants could only be identified to morphospecies, which we also refer to as species.

Spatial Extent

BEF China Main Experiment, Site A, near Xingangshan, Jiangxi

Published

Staab, M., Blüthgen, N. & Klein, A.M. (2015): Tree diversity alters the structure of a tri-trophic network in a biodiversity experiment. Oikos 124: 827-834. doi: 10.1111/oik.01723.

Temporal Extent

Mai 2011 - August 2011

Taxonomic Extent

Sap-sucking Hemiptera and honeydew-collecting ants

Data Analysis

The data unit of all data is the occurrence of a trophobiosis, i.e. every interaction between a Hemiptera and an ant species observed on an individual tree was only counted once, regardless of the number of individuals involved.

Data columns available in the raw data part of this dataset

PLOT_NO
Name of each plot, coded with letters and numbers in Site A; Datagroup description: Reasearch plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). There are three main sites for research plots in the BEF Experiment: Comparative Study Plots (CSP) in the Gutianshan Nature Reserve, having a size of 30x30m^2, measured on the ground. Main Experiment plots have a size of 1 mu, which is about 25x25m^2 in horizontal projection. Pilot Study Plots have a size of 1x1 m^2. Research plots on the main experiment have a "p" in front of their IDs and then a 6 digit code: Plots in the main sites A and B are named according to their position in the original spreadsheet, in which they were designed. They consist of 6 digits: _1st digit_: Site (1:A, 2:B), _digit 2and3_: southwards row: as in spreadsheets the rows are named from the top to the bottom; _digit 4 and 5_: westward column: as in the original spreadsheet, but the letters are converted to numbers (A=01, B=02); _6th digit_: indicator, if the plot has been shifted a quarter mu. Example: "p205260": "p" means that this is a plot that is specified. "2" means, that we are at site B. Now the coordinates of the south - west corner: "0526". Since "e" is the fifth letter of the alphabet, this is Plot E26. The last digit "0" means that this plot was not moved by a quarter of a Mu, as some sites in Site A. The 6th digit can also indicate the subplot within the plot. "5", "6", "7", "8" indicate the northwest, northeast, southeast, and southwest quarter plot respectively.
Data group: BEF research plot name
Keywords: location
Values
B34
C37
C31
D31
B38
TREE_R
Planned tree species richness according to design.; Datagroup description: Planted number of tree species per plot
Data group: Taxonomic biodiversity
Keywords: biodiversity
Values
16
2
8
1
4
Tree_label
Position of a given tree individual per plot given in XXYY; Datagroup description: There are 20x20 trees per plot. Tree_label marks the position of each tree in a coordinate system starting at 0000.
Data group: Individual position within plot in Site A or B (given by SP1/SP2)
Keywords: Main Experiment, location
Values
0408
0406
0407
0405
0411
Tree_species
Taxonomic name of tree species. For easier workflow during analysis, words were separated by "_"
Data group: Helper
Keywords: species, taxon
Values
Cyclobalanopsis_myrsinaefolia
Castanopsis_sclerophylla
Choerospondias_axillaris
Castanea_henryi
Cyclobalanopsis_glauca
Tree_species_Tax
Full taxonomic name of tree species
Data group: Scientific plant species name
Keywords: species, taxon
Values
Cyclobalanopsis glauca
Cyclobalanopsis myrsinifolia
Castanopsis sclerophylla
Castanea henryi
Choerospondias axillaris
Ant_species
Taxonomic name of ant species. For easier workflow during analysis, words were separated by "_". Species and Morphospecies are combined informations given in this column.
Data group: Helper
Keywords: species, taxon
Values
Camponotus_pseudoirritans
Camponotus_vitiosus
Carebara_sp.5
Crematogaster_rogenhoferi
Crematogaster_cf._nawai
Ant_species_Tax
Full taxonomic name of ant species
Data group: Ant species name
Keywords: species, taxon
Values
Camponotus vitiosus
Iridomyrmex anceps
Crematogaster rogenhoferi
Crematogaster cf. nawai
Camponotus pseudoirritans
Ant_morphospec
Ant_morphospec
Data group: Nominal taxon
Values
Carebara sp.5
Prenolepis sp.6
Nylanderia sp.3
NA
Hemiptera_species
Taxonomic name of Hemiptera species. For easier workflow during analysis, words were separated by "_". Species and Morphospecies are combined informations given in this column.
Data group: Helper
Keywords: species, taxon
Values
Centrotinae_sp.2
Aphis_odinae
Centrotinae_Larvae_1
Aphis_sp.1
Centrotinae_Larvae_2
Hemiptera_species_Tax
Full taxonomic name of Hemiptera species
Data group: Hemiptera species name
Keywords: species, taxon
Values
Eutrichosiphum sclerophyllum
Cervaphis quercus
Aphis odinae
Eutrichosiphum dubium
Diphyllaphis quercus
Hemiptera_morphospecies
Hemiptera samples that could only be identified to morphospecies
Data group: Nominal taxon
Keywords: morphospecies, Hemiptera
Values
Centrotinae sp.3
Centrotinae Larvae 1
Centrotinae Larvae 2
Centrotinae sp.2
Aphis sp.1
interaction
Number of trophobiotic interactions observed.
Unit: occurrences
Data group: Trophobiosis (count)
Values
1