BEF-China | CSPs: Ice storm breakage probability trees species standardized for CSPs

Show: CSPs: Ice storm breakage probability trees species standardized for CSPs

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.

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Dataset column

Name:

CSP

Definition:

Number of the CSP.

Unit:

No information available

Datagroup:

BEF research plot name

Keywords:

location, CSP

Values:

CSP05
CSP03
CSP02
CSP01
CSP04

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:

-12.78304482
-114.3923783
102.9279568
-138.3421558
-153.2387354

Contributors:

Baruffol, M., Kahl, A., Chi, X.

Dataset column

Name:

broken

Definition:

number of stems broken

Unit:

No information available

Datagroup:

Helper

Keywords:

No information available

Values:

14
15
0
10
1

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:

102
107
103
105
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
0.018691589
0
0.025641026
0.01369863

Contributors:

Baruffol, M., Kahl, A., Chi, X.

Filter:

Reset

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