CSPs: living or killed trees after the 2008 ice storm

Usage Rights

This data is Private.

Dataset Abstract

During the 2008 ice storm, large parts of the Gutianshan Nature Park were effected. Comparative study sites (CSPs) were selected in sites with overall low damage from the ice storm. Here we list tree stems that were either living, or killed by the ice storm based on field work of SP1 and SP10. Data are combined from several files, most prominently "Coarse woody debris (CWD): Collection of data on dead wood with special regard to the 2008 ice storm", "Tree stem reference list for the Comparative Study Sites (CSPs)", and "Tree size in the CSPs in 2008 and 2009 ". The dataset also includes estimated mortality risk based on a three Parameter Rickerts function and the residuals resulting from that model.

Dataset Design

"In the 30x30m CSPs the central of 9 subplots was mapped in greater detail than the remaining 8 plots, resulting in more tree stems <10cm in the central plot only. We checked for duplicated stems based on the stemID. There is an attached files with an R script, with which the data were generated. ---- We used the Power Rickerts function (Bolker 2007) to estimate size dependent mortality due to the ice storm for all individuals. The function describes a uni-modal curve through the origin and returning to zero mortality risk for very large individuals:
p=(p ) ̂(x/x ̂ e^((1-x/x ̂ )^α ) )
The three parameters of the Power Rickerts function are maximum mortality ((p ) ̂), diameter at maximum mortality (x ̂), and a scaling factor increasing the slope of the curve reaching maximum mortality (α). We used Bayesian inference and Gibbs Sampling via Markov Chain Monte Carlo (JAGS: Plummer, 2003) with uninformative priors to derive mortality risk estimates for each tree individual and to estimate model parameters and their confidence intervals.

Spatial Extent

Comparative Study sites, BEF China Experiment, Gutianshan, China
29°08'-29°17'N
118°02'-118°11'E

Temporal Extent

Living stems in 2008, killed stems in 2008 and early 2009.

Taxonomic Extent

Tree species names as in the reference list for tree species.

Data Analysis

Use this file to extrapolate tree mass before and after the ice storm.

Freeformat files (1)

Paper proposal submissions

Published

2010

Data columns available in the raw data part of this dataset

CWD_CSP
coarse woody debris item; Datagroup description: Woody debris items
Data group: Woody debris items
Keywords: woody debris, object
Values
CSP01_16
CSP01_1
CSP01_12
CSP01_10
CSP01_11
CSP
name of the CSP in the Nature Reserve BEF 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: location, CSP
Values
CSP02
CSP05
CSP01
CSP03
CSP04
BD
basal diameter; Datagroup description: Basal diameter; Datagroup description: Basal diameter
Unit: centimeter
Data group: Basal diameter
Keywords: response variable, basal diameter, size
Values
12.5
10
11.5
11
12
* Baruffol, M., Wirth, C., Kahl, A. also contributed to this column.
DBH
diameter at breastheight, those with column "to_estimate" == TRUE are estimated from BD; Datagroup description: Diameter at breast height; Datagroup description: Diameter at breast height; Instrumentation: diameter tape, calliper (derived from datagroup); Instrumentation: diameter tape, calliper (derived from datagroup)
Unit: centimeter
Data group: Diameter at breast height
Keywords: response variable, dbh, size
Values
10.1
10
10.03
10.06
10.02
* Baruffol, M., Wirth, C., Kahl, A. also contributed to this column.
species
species name; Datagroup description: Scientific plant species name; Datagroup description: Scientific plant species name; Source: Flora of China, Helge Bruelheide (derived from datagroup); Source: Flora of China, Helge Bruelheide (derived from datagroup)
Data group: Scientific plant species name
Keywords: species, explanatory
Values
Acer cordatum
Alangium kurzii
Acer amplum
Adinandra millettii
Actinidia spec.
* Baruffol, M., Wirth, C., Fang, T., Kahl, A. also contributed to this column.
stemID
stem identifier, don't change this number; Datagroup description: Tree identifier for trees in the comparative study sites (CSP plus Silver ID); Datagroup description: Tree identifier for trees in the comparative study sites (CSP plus Silver ID)
Data group: Tree identifier for trees in the comparative study sites (CSP plus Silver ID)
Keywords: stem, object
Values
CSP01_363013_1
CSP01_363060_1
CSP01_363012_1
CSP01_362568_1
CSP01_363041_1
* Baruffol, M., Wirth, C., Kahl, A. also contributed to this column.
dead
living status; Datagroup description: Living status; Datagroup description: Living status
Data group: Living status
Keywords: response variable, survival
Values
l
d
* Wirth, C., Kahl, A. also contributed to this column.
broken
indicating if a living stem has a broken top; Datagroup description: Living status
Data group: Living status
Keywords: response variable, ice storm, stem break
Values
broken
fallen
folded
* Baruffol, M. also contributed to this column.
to_estimate
rows for which dbh had to be estimated; Datagroup description: Helper; Datagroup description: Helper
Data group: Helper
Values
TRUE
FALSE
dbh_estimate
estimate of DBH based on basal diameter; Datagroup description: Helper
Data group: Helper
Values
10.3702615328402
1.27357303749016
11.1752782138447
10.7727698733424
11.9802948948491
broken_dead
Indicating of a stem is either broken or dead: ice_storm$broken_dead = ice_storm$dead == "d" | ice_storm$broken %in% c("broken", "fallen", "folded"); Datagroup description: Helper
Data group: Helper
Values
TRUE
FALSE
prob_mort_mean_broken
breaking probability as estimated by a Ricker three parameter function
Data group: Stem breaking probability
Keywords: response variable, ice storm, stem break
Values
0.0160756088702533
0.0100094925474557
0.013672570310701
0.00657164701226831
0.0102718561269259
prob_mort_lqu_broken
lower quartile of stem breaking probability
Data group: Stem breaking probability
Values
0.00294539441394437
0.00565984000473404
0.00452003466581148
0.00514386778822728
0.00165608015098869
prob_mort_uqu_broken
upper quartile of stem breaking probability
Data group: Stem breaking probability
Values
0.0170306740567706
0.030589560541687
0.017803097120899
0.0306945346553503
0.0238704082580321
mort_res_broken
residuals from the breaking probability to the incidence of breaking or not breaking of a stem; Datagroup description: Helper
Data group: Helper
Values
-0.00657164701226831
-0.0160756088702533
-0.013672570310701
-0.0100094925474557
-0.0102718561269259
mort_rank_broken
ranked residuals from estimated breaking probability. This measure is used for the mixed models in the ice storm paper; negative ranks were negetive deviations, positive ranks positive deviation from expected breaking risk; Datagroup description: Helper
Data group: Helper
Keywords: response variable, ice storm, stem break
Values
-100
-1000.5
0
-1001.5
-1002.5
height
mean height form 2008 and 2009 of a living tree. Dead trees are not considered. Data comes from the dataset "Tree size in the CSPs in 2008 and 2009"
Data group: Plant height
Keywords: response variable, height, size
Values
0.8
10.05
10
0.5
1
* Baruffol, M. also contributed to this column.