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Title:
Data for Fichtner et. al. 2020 "Neighbourhood diversity mitigates drought impacts on tree growth" J. Ecol.
Access rights:
Free for public
Usage rights:
No information available
Published:
No information available
Abstract:
1. Biodiversity is considered to mitigate detrimental impacts of climate change on the functioning of forest ecosystems, such as drought-induced decline in forest productivity. However, previous studies produced controversial results and experimental evidence is rare. Specifically, the biological mechanisms underlying mitigation effects remain unclear, as existing work focuses on biodiversity effects related to the community scale. 2. By using trait-based neighbourhood models, we quantified changes in aboveground wood productivity of 3397 trees that were planted in a large-scale tree diversity experiment in subtropical China across gradients of neighbourhood diversity and climatic conditions over a six-year period. This approach allowed us to simultaneously assess to what extent functional traits of a focal tree and biodiversity at the local neighbourhood scale mediate the growth response of individual trees to drought events. 3. We found that neighbourhood tree species richness can mitigate for drought-induced growth decline of young trees. Overall, positive net biodiversity effects were strongest during drought and increased with increasing taxonomic diversity of neighbours. In particular, drought-sensitive species (i.e. those with a low cavitation resistance) benefitted the most from growing in diverse neighbourhoods, suggesting that soil water partitioning among local neighbours during drought particularly facilitated most vulnerable individuals. Thus, diverse neighbourhoods may enhance ecosystem resistance to drought by locally supporting drought-sensitive species in the community. 4. Synthesis. Our findings demonstrate that mechanisms operating at the local neighbourhood scale are a key component for regulating forests responses to drought and improve insights into how local species interactions vary along stress gradients in highly diverse tree communities.
Design:
No information available
Spatial extent:
No information available
Temporal extent:
2010-2016
Taxonomic extent:
Trees
Measurement cirumstances:
No information available
Data analysis:
No information available

Filter:
Dataset column

Name:
TAG
Definition:
code for planting locations, 12 digits with "t" in front
Unit:
No information available
Datagroup:
t or s TAG Main Experiment
Keywords:
No information available
Values:
t102340010509
t102340010511
t102340010506
t102340010510
t102340010514
Contributors:
No information available

Dataset column

Name:
PTAG
Definition:
Plot ID across CSP, MainA and MainB
Unit:
id
Datagroup:
PTAG
Keywords:
No information available
Values:
p103310
p102350
p102361
p102381
p102340
Contributors:
No information available

Dataset column

Name:
ALTITUDE
Definition:
elevation (from interpolated raster); Datagroup description: Elevation above sea level. Altitude.
Unit:
m
Datagroup:
Elevation
Keywords:
No information available
Values:
111.89
113.05
112.58
112.7
112.87
Contributors:
No information available

Dataset column

Name:
SLOPE
Definition:
slope (from interpolated raster); Datagroup description: Inclination "is the angular distance of the orbital plane from the plane of reference (usually the primary's equator or the ecliptic), normally stated in degrees" (Wikipedia). Also referred to as 'slope'.
Unit:
degree
Datagroup:
Inclination
Keywords:
No information available
Values:
10.23
10.15
10.22
10.26
10.01
Contributors:
No information available

Dataset column

Name:
SpeciesCode
Definition:
focal tree species identity
Unit:
No information available
Datagroup:
Species codes (Species numbers in the Main experiment)
Keywords:
No information available
Values:
1
11
10
13
12
Contributors:
No information available

Dataset column

Name:
PSI50
Definition:
water potential at which 50% of xylem hydraulic conductivity is lost, data provided in Kröber, Zhang, Ehmig, & Bruelheide (2014), PLoS ONE, 9, e109211
Unit:
MPa
Datagroup:
trait
Keywords:
No information available
Values:
-2.697233227
-2.423270307
-1.281014328
-1.672887281
-1.853967951
Contributors:
No information available

Dataset column

Name:
SAWP
Definition:
standardised annual aboveground wood productivity; aboveground wood productivity (AWP) of a given focal tree in a specific census interval devided by the average AWP (using the 50% quantile of AWP) of the respective census
Unit:
dimensionless
Datagroup:
Above and below ground biomass measurement
Keywords:
No information available
Values:
0.004170959214110317
0.002106128592218533
0.0030104659074083905
0.0039631136422347306
0.0027315558619206747
Contributors:
No information available

Dataset column

Name:
NCI
Definition:
neighbourhood competition index; the focal trees’ basal area relative to the total basal area of closest neighbours
Unit:
cm2 cm-2
Datagroup:
Neighbourhood diverstiy
Keywords:
No information available
Values:
0.0002561475447595801
0.0006998988074331117
0.00028478309137369045
0.0006476684241187709
0.0004498425761300037
Contributors:
No information available

Dataset column

Name:
nb_count
Definition:
total number of living neighbours
Unit:
count
Datagroup:
Abundance
Keywords:
No information available
Values:
4
2
3
1
5
Contributors:
No information available

Dataset column

Name:
nb_richness
Definition:
neigbourhood tree spcies richness; the total number of closest heterospecific neighbour species
Unit:
count
Datagroup:
Neighbourhood diverstiy
Keywords:
No information available
Values:
0
4
2
3
1
Contributors:
No information available

Dataset column

Name:
nb_mix
Definition:
neighbourhood species composition
Unit:
No information available
Datagroup:
Neighbourhood diverstiy
Keywords:
No information available
Values:
10_14_18
10_11_22
11
1
10_15
Contributors:
No information available

Dataset column

Name:
SPEI_12_Oct
Definition:
standardised precipitation-evapotranspiration index calculated for a 12 month timescale, see Fichtner et al. 2020 (Journal of Ecology) for calculation
Unit:
dimensionless
Datagroup:
Precipitation
Keywords:
No information available
Values:
1.38172
1.44876
-0.29015
-1.51947
0.67536
Contributors:
No information available

Dataset column

Name:
Initial_year
Definition:
initial year of census
Unit:
nominal Year
Datagroup:
Date
Keywords:
No information available
Values:
2013
2010
2011
2014
2012
Contributors:
No information available

No information available


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