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Title:
CSPs: Ice storm breakage probability trees species standardized for CSPs
Access rights:
Free for public
Usage rights:
free for public
Published:
Model is published along paper proposal "Tree species traits but not diversity mitigate stem breakage in a subtropical forest following a rare and extreme ice storm" (http://china.befdata.biow.uni-leipzig.de/paperproposals/7)
Abstract:
The probability of a tree stem to break from an ice storm, if a random species was picked. The data results as random plot effects from a random effects model including taxon (species) and plot as random factors. Thus, breakage probability is standardized for species, as if a "new" random species was chosen. See the attached graphic for a plot that shows standardized breakage probability over the percentage of broken stems. The latter is biased by the species composition of the plot.
Design:
The underlying data combine both living and dead trees (dataset "Living or killed trees after the 2008 ice storm", http://china.befdata.biow.uni-leipzig.de/datasets/239).
Spatial extent:
Comparative Study Plots, Gutianshan National Reserve 29°08'-29°17'N 118°02'-118°11'E
Temporal extent:
No information available
Taxonomic extent:
tree species
Measurement cirumstances:
No information available
Data analysis:
The random model was calculated with R: lmer_random_ml <- lmer(mort_rank_broken ~ 1 + (1|plot) + (1|family/species), data = resid_mort, REML = F). This represents a random effects model. We extracted random effects like this: ranef(lmer_random_ml)$plot. We excluded all individuals without at least a genus attribute. We further excluded individuals belonging to plant families with less than 5 individuals in the whole dataset. Thus, individuals from rare families are excluded. --- The resulting species standardized breakage probability for plots can be used for further plot based inspections of multifuncionality.

Filter:
Dataset column

Name:
CSP
Definition:
Number of the CSP.
Unit:
No information available
Datagroup:
BEF research plot name
Keywords:
location, CSP
Values:
CSP03
CSP02
CSP05
CSP04
CSP01
Contributors:
No information available

Dataset column

Name:
ice_breakage
Definition:
species corrected breakage probability for each plot
Unit:
probability
Datagroup:
Stem breaking probability
Keywords:
ice storm, extreme event, disturbance, survival
Values:
-138.3421558
-12.78304482
-114.3923783
102.9279568
-153.2387354
Contributors:

Dataset column

Name:
broken
Definition:
number of stems broken
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
1
10
15
0
14
Contributors:
No information available

Dataset column

Name:
presence
Definition:
number of stems present, only individuals with genus name and from families with 5 or more individuals, thus rare families excluded
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
105
107
103
102
101
Contributors:
No information available

Dataset column

Name:
perc_broken
Definition:
percent of broken stems, attention: percentage is biased by species composition of the plot!
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
0.019417476
0.01369863
0
0.025641026
0.018691589
Contributors:

No information available


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Attachment:

File name:
breakage_prob_over_perc_broken.pdf
Description:
Graph showing species corrected probability of breakage across percent breakage per plot. Percent breakage is biased by the species composition of the plot.
Uri:
No information available
Is essential:
No information available
Content type:
application/pdf
File size:
5.88 KB
Created at:
2014-04-12
Updated at:
2014-04-12

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3 nadrowski medium

Karin
Nadrowski

Owner of:
44 Datasets

Involved in:
1 Projects

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