Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China

Bo Yang, Ynig Li, Bingyang Ding, Sabine Both, Alexandra Erfmeier, Werner Härdtle, Keping Ma, Bernhard Schmid, Thomas Scholten, Gunnar Seidler, Goddert von Oheimb, Xuefei Yang, Helge Bruelheide

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Aims
Although shrubs are an important component of forests, their role has not yet been considered in forest biodiversity experiments. In the biodiversity–ecosystem functioning (BEF) experiment with subtropical tree species in south-east China (BEF-China), we factorially combined tree with shrub species-diversity treatments. Here, we tested the hypotheses that shrub survival differs between the 10 planted shrub species, with lower survival rates of late- than early-successional species and is affected by environmental conditions, such as topography and top soil characteristics, as well as by biotic factors, represented by tree, shrub and herb layer characteristics.

Methods
We analyzed the survival of 42 000 shrub individuals in 105 plots varying in tree and shrub species richness of the BEF-China project four years after planting. Shrub survival was analyzed with generalized linear mixed effects models at the level of individuals and with variance partitioning at the plot level. Random intercept and random slope models of different explanatory variables were compared with respect to the Bayesian Information Criterion (BIC).

Important Findings
Survival rates differed largely between the 10 shrub species, ranging from 26% to 91% for Ardisia crenata and Distylium buxifolium, respectively. Irrespective of species identity, single abiotic factors explained up to 5% of species survival, with a negative effect of altitude and slope inclination and a positive effect of the topsoil carbon to nitrogen ratio, which pointed to drought as the major cause of shrub mortality. In contrast, neither tree nor shrub richness affected shrub survival at this early stage of the experiment. Among the biotic predictors, only herb layer species richness and cover of the dominant fern species (Dicranopteris pedata) affected shrub survival. Overall, our models that included all variables could explain about 65% in shrub survival, with environmental variables being most influential, followed by shrub species identity, while tree species diversity (species richness and identity) and herb layer characteristics contributed much less. Thus, in this early stage of the experiment the biotic interactions among shrubs and between shrubs and trees have not yet overruled the impact of abiotic environmental factors.
Original languageEnglish
Pages (from-to)179-189
Number of pages11
JournalPlant Ecology
Volume10
Issue number1
DOIs
Publication statusPublished - 30 Jan 2017

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shrub
shrubs
environmental conditions
biodiversity
environmental factors
China
experiment
species diversity
herb
herbs
species richness
topsoil
Distylium
Dicranopteris
Ardisia
biotic factor
fern
ferns and fern allies
topography
environmental factor

Keywords

  • BEF-China
  • biodiversity–ecosystem functioning experiment
  • forest herb layer
  • plant survival
  • shrub species richness

Cite this

Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China. / Yang, Bo; Li, Ynig; Ding, Bingyang; Both, Sabine; Erfmeier, Alexandra; Härdtle, Werner; Ma, Keping; Schmid, Bernhard; Scholten, Thomas; Seidler, Gunnar; von Oheimb, Goddert; Yang, Xuefei; Bruelheide, Helge.

In: Plant Ecology, Vol. 10, No. 1, 30.01.2017, p. 179-189.

Research output: Contribution to journalArticle

Yang, B, Li, Y, Ding, B, Both, S, Erfmeier, A, Härdtle, W, Ma, K, Schmid, B, Scholten, T, Seidler, G, von Oheimb, G, Yang, X & Bruelheide, H 2017, 'Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China', Plant Ecology, vol. 10, no. 1, pp. 179-189. https://doi.org/10.1093/jpe/rtw099
Yang, Bo ; Li, Ynig ; Ding, Bingyang ; Both, Sabine ; Erfmeier, Alexandra ; Härdtle, Werner ; Ma, Keping ; Schmid, Bernhard ; Scholten, Thomas ; Seidler, Gunnar ; von Oheimb, Goddert ; Yang, Xuefei ; Bruelheide, Helge. / Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China. In: Plant Ecology. 2017 ; Vol. 10, No. 1. pp. 179-189.
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title = "Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China",
abstract = "AimsAlthough shrubs are an important component of forests, their role has not yet been considered in forest biodiversity experiments. In the biodiversity–ecosystem functioning (BEF) experiment with subtropical tree species in south-east China (BEF-China), we factorially combined tree with shrub species-diversity treatments. Here, we tested the hypotheses that shrub survival differs between the 10 planted shrub species, with lower survival rates of late- than early-successional species and is affected by environmental conditions, such as topography and top soil characteristics, as well as by biotic factors, represented by tree, shrub and herb layer characteristics.MethodsWe analyzed the survival of 42 000 shrub individuals in 105 plots varying in tree and shrub species richness of the BEF-China project four years after planting. Shrub survival was analyzed with generalized linear mixed effects models at the level of individuals and with variance partitioning at the plot level. Random intercept and random slope models of different explanatory variables were compared with respect to the Bayesian Information Criterion (BIC).Important FindingsSurvival rates differed largely between the 10 shrub species, ranging from 26{\%} to 91{\%} for Ardisia crenata and Distylium buxifolium, respectively. Irrespective of species identity, single abiotic factors explained up to 5{\%} of species survival, with a negative effect of altitude and slope inclination and a positive effect of the topsoil carbon to nitrogen ratio, which pointed to drought as the major cause of shrub mortality. In contrast, neither tree nor shrub richness affected shrub survival at this early stage of the experiment. Among the biotic predictors, only herb layer species richness and cover of the dominant fern species (Dicranopteris pedata) affected shrub survival. Overall, our models that included all variables could explain about 65{\%} in shrub survival, with environmental variables being most influential, followed by shrub species identity, while tree species diversity (species richness and identity) and herb layer characteristics contributed much less. Thus, in this early stage of the experiment the biotic interactions among shrubs and between shrubs and trees have not yet overruled the impact of abiotic environmental factors.",
keywords = "BEF-China, biodiversity–ecosystem functioning experiment, forest herb layer, plant survival, shrub species richness",
author = "Bo Yang and Ynig Li and Bingyang Ding and Sabine Both and Alexandra Erfmeier and Werner H{\"a}rdtle and Keping Ma and Bernhard Schmid and Thomas Scholten and Gunnar Seidler and {von Oheimb}, Goddert and Xuefei Yang and Helge Bruelheide",
note = "We would like to thank Chen Lin for the help in coordinating the fieldwork for the BEF-China experiment, Ricarda Pohl, Mo Gao for their investigation on the herb layer and Teng Fang for herb layer species identification. We acknowledge the general support of the whole BEF-China research group which is largely financed by the German Research Foundation (DFG FOR 891/1, 2, 3) in a grant to H.B. (Br1698/10–3). We are also indebted to the Sino-German Centre for Research Promotion in Beijing for travel grants and the participation in a summer school on scientific writing (GZ 785) and for support through the cooperation group “Linkages between plant diversity, microbial diversity and ecosystem functioning in subtropical forest” (GZ 986).",
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T1 - Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China

AU - Yang, Bo

AU - Li, Ynig

AU - Ding, Bingyang

AU - Both, Sabine

AU - Erfmeier, Alexandra

AU - Härdtle, Werner

AU - Ma, Keping

AU - Schmid, Bernhard

AU - Scholten, Thomas

AU - Seidler, Gunnar

AU - von Oheimb, Goddert

AU - Yang, Xuefei

AU - Bruelheide, Helge

N1 - We would like to thank Chen Lin for the help in coordinating the fieldwork for the BEF-China experiment, Ricarda Pohl, Mo Gao for their investigation on the herb layer and Teng Fang for herb layer species identification. We acknowledge the general support of the whole BEF-China research group which is largely financed by the German Research Foundation (DFG FOR 891/1, 2, 3) in a grant to H.B. (Br1698/10–3). We are also indebted to the Sino-German Centre for Research Promotion in Beijing for travel grants and the participation in a summer school on scientific writing (GZ 785) and for support through the cooperation group “Linkages between plant diversity, microbial diversity and ecosystem functioning in subtropical forest” (GZ 986).

PY - 2017/1/30

Y1 - 2017/1/30

N2 - AimsAlthough shrubs are an important component of forests, their role has not yet been considered in forest biodiversity experiments. In the biodiversity–ecosystem functioning (BEF) experiment with subtropical tree species in south-east China (BEF-China), we factorially combined tree with shrub species-diversity treatments. Here, we tested the hypotheses that shrub survival differs between the 10 planted shrub species, with lower survival rates of late- than early-successional species and is affected by environmental conditions, such as topography and top soil characteristics, as well as by biotic factors, represented by tree, shrub and herb layer characteristics.MethodsWe analyzed the survival of 42 000 shrub individuals in 105 plots varying in tree and shrub species richness of the BEF-China project four years after planting. Shrub survival was analyzed with generalized linear mixed effects models at the level of individuals and with variance partitioning at the plot level. Random intercept and random slope models of different explanatory variables were compared with respect to the Bayesian Information Criterion (BIC).Important FindingsSurvival rates differed largely between the 10 shrub species, ranging from 26% to 91% for Ardisia crenata and Distylium buxifolium, respectively. Irrespective of species identity, single abiotic factors explained up to 5% of species survival, with a negative effect of altitude and slope inclination and a positive effect of the topsoil carbon to nitrogen ratio, which pointed to drought as the major cause of shrub mortality. In contrast, neither tree nor shrub richness affected shrub survival at this early stage of the experiment. Among the biotic predictors, only herb layer species richness and cover of the dominant fern species (Dicranopteris pedata) affected shrub survival. Overall, our models that included all variables could explain about 65% in shrub survival, with environmental variables being most influential, followed by shrub species identity, while tree species diversity (species richness and identity) and herb layer characteristics contributed much less. Thus, in this early stage of the experiment the biotic interactions among shrubs and between shrubs and trees have not yet overruled the impact of abiotic environmental factors.

AB - AimsAlthough shrubs are an important component of forests, their role has not yet been considered in forest biodiversity experiments. In the biodiversity–ecosystem functioning (BEF) experiment with subtropical tree species in south-east China (BEF-China), we factorially combined tree with shrub species-diversity treatments. Here, we tested the hypotheses that shrub survival differs between the 10 planted shrub species, with lower survival rates of late- than early-successional species and is affected by environmental conditions, such as topography and top soil characteristics, as well as by biotic factors, represented by tree, shrub and herb layer characteristics.MethodsWe analyzed the survival of 42 000 shrub individuals in 105 plots varying in tree and shrub species richness of the BEF-China project four years after planting. Shrub survival was analyzed with generalized linear mixed effects models at the level of individuals and with variance partitioning at the plot level. Random intercept and random slope models of different explanatory variables were compared with respect to the Bayesian Information Criterion (BIC).Important FindingsSurvival rates differed largely between the 10 shrub species, ranging from 26% to 91% for Ardisia crenata and Distylium buxifolium, respectively. Irrespective of species identity, single abiotic factors explained up to 5% of species survival, with a negative effect of altitude and slope inclination and a positive effect of the topsoil carbon to nitrogen ratio, which pointed to drought as the major cause of shrub mortality. In contrast, neither tree nor shrub richness affected shrub survival at this early stage of the experiment. Among the biotic predictors, only herb layer species richness and cover of the dominant fern species (Dicranopteris pedata) affected shrub survival. Overall, our models that included all variables could explain about 65% in shrub survival, with environmental variables being most influential, followed by shrub species identity, while tree species diversity (species richness and identity) and herb layer characteristics contributed much less. Thus, in this early stage of the experiment the biotic interactions among shrubs and between shrubs and trees have not yet overruled the impact of abiotic environmental factors.

KW - BEF-China

KW - biodiversity–ecosystem functioning experiment

KW - forest herb layer

KW - plant survival

KW - shrub species richness

U2 - 10.1093/jpe/rtw099

DO - 10.1093/jpe/rtw099

M3 - Article

VL - 10

SP - 179

EP - 189

JO - Plant Ecology

JF - Plant Ecology

SN - 1385-0237

IS - 1

ER -