CSPs: Herbivore damage on saplings of 23 tree and shrub species in the CSPs

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restricted to data owners

Dataset Abstract

This study was designed to quantify the degree of herbivore damage on saplings of different tree and shrub species in the 27 Comparative Study Plots. In June/July 2008, we selected 1,818 saplings (20-100 cm height) of 23 species and visually assessed herbivore damage using a percentage class system. We intend to relate leaf consumption to tree diversity and the density of conspecifics in the tree layer of the CSPs. Both have often been suggested to influence herbivory. Especially data on the relationship between herbivory and plant diversity in highly diverse forest systems is scarce and the CSPs in the Gutianshan National Nature Reserve offer an excellent opportunity to tackle this issue. In cooperation with other subprojects, differences in succeptibility to herbivory between species can be studied using data on leaf chemistry and range sizes of the species.

Dataset Design

Twenty-three evergreen tree and shrub species were selected to study folivory on saplings in the 27 CSPs: Ardisia crenata, Camellia fraterna, Castanopsis carlesii, Castanopsis eyrei, Castanopsis fargesii, Castanopsis tibetana, Cinnamomum subavenium, Cyclobalanopsis glauca, Cyclobalanopsis myrsinaefolia, Daphniphyllum oldhamii, Eurya muricata, Eurya rubiginosa, Itea chinensis, Lespedeza formosa, Lithocarpus glaber, Loropetalum chinense, Machilus thunbergii, Meliosma oldhamii, Myrica rubra, Neolitsea aurata, Quercus serrata, Schima superba and Symplocos stellaris. In each plot, a maximum of ten saplings of each species (with a height between 20 and 100 cm) was randomly sampled by crossing the whole plot along parallel transects from one side to the opposite side. The degree of foliar damage, defined as the removal of photosynthetic tissue due to leaf-chewing, mining and galling (and, if visible, sucking) insects, was assessed for all leaves of the saplings. To account for age specific differences in leaf herbivory, we differentiated between young (expanded in the current growing season) and old leaves (expanded in previous growing seasons). Senescent or fungally heavily damaged leaves were excluded. Sampling was conducted once on each plot at the end of the rainy season in June/July 2008. Thus, we recorded standing levels of herbivory instead of consumption rates over a specified period of time. Herbivore damage was visually estimated using percentage classes of leaf tissue removal (0%; 5-15%; >15-35%; >35%). These classes were defined beforehand by analyzing random collections of leaves. The leaves were digitally scanned and the degree of herbivory was determined using pixel ratios of the removed and the estimated total leaf tissue of each leaf, extracted with the histogram function in Adobe Photoshop CS3. Herbivore damage in the field was assessed by only one person (A.S.) to prevent variability in estimation accuracy. Mean percentage of herbivory from the sampled leaves (0%; 0.5%; 3%; 9%; 23%; 55%) for each percentage class was calculated for further analyses.

Spatial Extent

Gutianshan National Nature Reserve: Assessment of leaf herbivory on 1,818 saplings of 23 tree and shrub species in the 27 CSPs (June/July 2008)

Temporal Extent

June July 2008

Taxonomic Extent

Ardisia crenata, Camellia fraterna, Castanopsis carlesii, Castanopsis eyrei, Castanopsis fargesii, Castanopsis tibetana, Cinnamomum subavenium, Cyclobalanopsis glauca, Cyclobalanopsis myrsinaefolia, Daphniphyllum oldhamii, Eurya muricata, Eurya rubiginosa, Itea chinensis, Lespedeza formosa, Lithocarpus glaber, Loropetalum chinense, Machilus thunbergii, Meliosma oldhamii, Myrica rubra, Neolitsea aurata, Quercus serrata, Schima superba and Symplocos stellaris

Data Analysis

Used to calculate herbivory pressure on tree saplings in the CSPs

Paper proposal submissions

Published

2013

Data columns available in the raw data part of this dataset

CSP
name of the CSP in the Nature ReserveBEF research plot nameReasearch 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.
Data group: BEF research plot name
Keywords: CSP
Values
CSP04
CSP05
CSP01
CSP03
CSP02
date
sampling date
Data group: Date time information
Keywords: date
Values
2008-06-05 00:00:00
2008-05-27 00:00:00
2008-05-31 00:00:00
2008-06-03 00:00:00
2008-05-26 00:00:00
species
study species
Data group: Scientific plant species name
Keywords: species, tree individual, sapling
Values
Castanopsis carlesii
Ardisia crenata
Castanopsis fargesii
Castanopsis eyrei
Camellia fraterna
spec
species name abbreviated (first three letter genus_first three letters species name)
Data group: Helper
Values
Cam_fra
Cas_car
Cas_eyr
Cas_far
Ard_cre
height
height (cm) of the sampled individual, using measuring tape
Unit: cm
Data group: Plant height
Keywords: height
Values
10
120
20
100
15
dam_yng0
number of young leaves of the sampled individual in damage category 0
Unit: count
Data group: Leaf count in herbivore damage class
Keywords: herbivory
Values
0
1
104
10
102
dam_yng1
number of young leaves of the sampled individual in damage category 1
Unit: count
Data group: Leaf count in herbivore damage class
Keywords: herbivory
Values
11
10
1
0
12
dam_yng2
number of young leaves of the sampled individual in damage category 2
Unit: count
Data group: Leaf count in herbivore damage class
Values
10
0
1
12
11
dam_yng3
number of young leaves of the sampled individual in damage category 3
Unit: count
Data group: Leaf count in herbivore damage class
Values
12
10
11
1
0
dam_yng4
number of young leaves of the sampled individual in damage category 4
Unit: count
Data group: Leaf count in herbivore damage class
Values
10
0
1
11
12
dam_yng5
number of young leaves of the sampled individual in damage category 5
Unit: count
Data group: Leaf count in herbivore damage class
Values
12
1
11
10
0
dam_old0
number of old leaves of the sampled individual in damage category 0
Unit: count
Data group: Leaf count in herbivore damage class
Values
0
11
10
104
1
dam_old1
number of old leaves of the sampled individual in damage category 1
Unit: count
Data group: Leaf count in herbivore damage class
Values
11
12
1
10
0
dam_old2
number of old leaves of the sampled individual in damage category 2
Unit: count
Data group: Leaf count in herbivore damage class
Values
11
10
0
1
12
dam_old3
number of old leaves of the sampled individual in damage category 3
Unit: count
Data group: Leaf count in herbivore damage class
Values
10
11
0
1
12
dam_old4
number of old leaves of the sampled individual in damage category 4
Unit: count
Data group: Leaf count in herbivore damage class
Values
11
1
10
0
12
dam_old5
number of old leaves of the sampled individual in damage category 5
Unit: count
Data group: Leaf count in herbivore damage class
Values
1
12
10
0
11
sum_young
total number of young leaves of the sampled individual
Unit: count
Data group: Leaf count in herbivore damage class
Values
10
103
1
101
0
sum_old
total number of old leaves of the sampled individual
Unit: count
Data group: Leaf count in herbivore damage class
Values
1
100
0
10
103
sum_all
total number of all leaves of the sampled individual
Unit: count
Data group: Leaf count in herbivore damage class
Values
10
101
100
103
102
mean_young
mean percentage of herbivore damage of all young leaves of the sampled individual
Unit: percent
Data group: Herbivore damage
Keywords: leaf, herbivory
Values
0.023809523809523808
0.029411764705882353
0.025
0.022727272727272728
0
mean_old
mean percentage of herbivore damage of all old leaves of the sampled individual
Unit: percent
Data group: Herbivore damage
Keywords: leaf, herbivory
Values
0.09375
0.10714285714285714
0.25
0
0.07692307692307693
mean_all
mean percentage of herbivore damage of all leaves of the sampled individual
Unit: percent
Data group: Herbivore damage
Keywords: leaf, herbivory
Values
0.023809523809523808
0
0.05263157894736842
0.08695652173913043
0.1