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Title:
Data for Schuldt et al. "Tree species richness attenuates the positive relationship between mutualistic ant–hemipteran interactions and leaf chewer herbivory" (Proceedings B 2017)
Access rights:
Free for public
Usage rights:
Please contact Andreas Schuldt for further details
Published:
No information available
Abstract:
Interactions across trophic levels influence plant diversity effects on ecosystem functions, but the complexity of these interactions remains poorly explored. For example, the interplay between different interactions (e.g. mutualism, predation) might be an important moderator of biodiversity-ecosystem function relationships. We tested for effects of trophobioses (facultative ant-hemipteran mutualism) on leaf chewer herbivory in a subtropical forest biodiversity experiment. We analysed trophobiosis and herbivory data of more than 10,000 trees along a tree species richness gradient.
Design:
Both the herbivory and trophobiosis assessments were conducted at the end of the main growing season in September to quantify standing levels of leaf damage. In monocultures and two species-mixtures, all trees in the enlarged core area of 6 x 6 individuals (= 36 trees) were measured. In species-mixtures with 4 species, the core area to be measured comprised 9 x 9 individuals (= 81 trees) and in 8, 16 and 24 species-mixtures, the core area was 12 x 12 individuals (= 144 trees). On each large 4-mu plot, measurements were conducted in the core area of only one of the four 1-mu subplots (i.e. in the VIP subplots without additional shrubs planted). The degree of foliar damage by insects, defined as the combined removal of photosynthetic tissue by leaf-chewing, mining and galling (and, if visible, sucking) insects, was estimated using percentage classes of 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%, <5%, <25%, <50%, <75%, >75%). Values provided here are the means of each category (i.e. 0%, 2.5%, 15%, 37.5%, 62.5%, 87.5%). The same trees checked for herbivory were inspected for trophobioses in a separate sampling campaign, but at the same time of the year (September to beginning of October) in 2014. On each tree, a total of 20 young leaves and the attached branch sections of three randomly selected branches were visually inspected for the occurrence and the number of sap-sucking Hemiptera and honeydew-collecting ants. Common and conspicuous ants and Hemiptera were identified in the field. Of other trophobioses, voucher specimens were collected (stored in 99% ethanol). Vouchers were subsequently grouped into morphospecies and identified to the lowest possible taxonomic level.
Spatial extent:
Main Experiment
Temporal extent:
2014-2015
Taxonomic extent:
No information available
Measurement cirumstances:
No information available
Data analysis:
No information available

Filter:
Dataset column

Name:
Tree
Definition:
identifier for the tree; Datagroup description: Tree tags consist of 12 digits: The first 6 are the site plot name: _1_ site _2/3_ row, counting from North _4/5_ column, counting from west _6_ is the plot moved? Is it a quarter pot? The next 6 digits describe the tree individual _7/8_ type of individual (01 planned tree, 02 other tree than planted but in a given plot somewhere, 03 planned shrub, 04 other shrub within this plot) _9/10_ x grid position within plot, starting from southwest northwards _11/12 y grid position, starting from southwest eastwards
Unit:
No information available
Datagroup:
Tree or shrub position tag main experiment
Keywords:
tree, location, object
Values:
t102340010408
t102340010407
t102340010404
t102340010405
t102340010409
Contributors:
No information available

Dataset column

Name:
Plot
Definition:
Study plot
Unit:
No information available
Datagroup:
Plot name (letter, number code)
Keywords:
location
Values:
A_B34
A_B36
A_B38
A_B35
A_C31
Contributors:
No information available

Dataset column

Name:
NB_trophobioses
Definition:
Number of trophobioses
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
3
0
2
1
10
Contributors:
No information available

Dataset column

Name:
Eutrichosiphum.heterotrichum
Definition:
Number of individuals
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
100
11
1
10
0
Contributors:
No information available

Dataset column

Name:
Eutrichosiphum.tattakanum
Definition:
Number of individuals
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
100
1
0
10
11
Contributors:
No information available

Dataset column

Name:
Hemiptera_sum
Definition:
Total number of individuals of Hemiptera
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
0
10
1
102
100
Contributors:
No information available

Dataset column

Name:
Crematogaster.rogenhoferi
Definition:
Number of individuals
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
0
10
107
1
100
Contributors:
No information available

Dataset column

Name:
Polyrhachis.dives
Definition:
Number of individuals
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
10
13
0
12
1
Contributors:
No information available

Dataset column

Name:
Technomyrmex.brunneus
Definition:
Number of individuals
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
10
1
15
150
0
Contributors:
No information available

Dataset column

Name:
Tetramorium.wroughtonii
Definition:
Number of individuals
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
11
1
0
10
100
Contributors:
No information available

Dataset column

Name:
Ants_sum
Definition:
Total number of individuals of ants
Unit:
No information available
Datagroup:
Organism count
Keywords:
abundance
Values:
107
100
0
10
1
Contributors:
No information available

Dataset column

Name:
Herbivory
Definition:
Mean percent leaf damage per tree, averaged over all leaves; Datagroup description: Mean herbivory
Unit:
percent
Datagroup:
Herbivore damage
Keywords:
leaf, herbivory, response
Values:
0.238095238
0.119047619
0.3125
0.25
0
Contributors:
No information available

Dataset column

Name:
Tree_species
Definition:
Species number of the tree individual
Unit:
No information available
Datagroup:
Tree species identifier in the Main Experiment design
Keywords:
species
Values:
Ailanthus altissima
Betula luminifera
Alniphyllum fortunei
Acer davidii
Castanea henryi
Contributors:
No information available

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