Species identity and composition effects on community productivity in a subtropical forest

Ma, Liwei; Bongers, Franca J.; Li, Shan; Tang, Ting; Yang, Bo; Ma, Keping; Liu, Xiaojuan

doi:10.1016/j.baae.2021.01.005

Cited by 14 publications

(13 citation statements)

References 48 publications

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“…Consistently, AM and EM trees did not show complementary use of resources, which is in line with a previous study in the MyDiv experiment (Reuter et al, 2021). In fact, AM tree communities had the highest basal area in all diversity levels and over the whole study period, which is consistent with a recent study in a subtropical forest (Ma et al, 2021). The high productivity of AM tree communities could be due to two reasons: on the one hand, AM tree species are known to have a fast growth strategy (Cornelissen et al, 2001; Ferlian et al, 2018), and several species are pioneers at juvenile stages, e.g., S. aucuparia (Myking et al, 2013) and P. avium (Petrokas et al, 2020); on the other hand, the soil of the experimental field is rich in nitrogen, while phosphorous is more limited (Ferlian et al, 2018), which favours AM associations more than EM associations (Holste et al, 2017; Read 1991).…”

Section: Discussionsupporting

confidence: 92%

Tree diversity effects on productivity depend on mycorrhizae and life strategies in a temperate forest experiment

Dietrich

Ferlian

Huang

et al. 2022

Preprint

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Tree species are known to predominantly interact either with arbuscular mycorrhizal (AM) or ectomycorrhizal (EM) fungi. However, there is a knowledge gap whether these mycorrhizae differently influence biodiversity-ecosystem functioning (BEF) relationships and whether a combination of both can increase community productivity. In 2015, we established a tree-diversity experiment by growing tree communities with varying species-richness levels (1, 2, or 4 species), and either with AM or EM tree species, or a combination of both. We investigated basal area and annual basal area increment from 2015 to 2020 as proxy for community productivity. We found significant positive relationships between tree species richness and community productivity, which strengthened over time. Further, AM and EM tree species differently influenced productivity; however, there was no overyielding when AM and EM trees grew together. EM tree communities were characterized by low productivity in the beginning, but an increase of increment over time, and showed overall strong biodiversity effects. For AM tree communities the opposite was true. While young trees did not benefit from the presence of the other mycorrhizal type, dissimilar mechanisms underlying BEF relationships in AM and EM trees indicate that maximizing tree and mycorrhizal diversity may increase ecosystem functioning in the long run.

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Section: Discussionsupporting

confidence: 92%

Tree diversity effects on productivity depend on mycorrhizae and life strategies in a temperate forest experiment

Dietrich

Ferlian

Huang

et al. 2022

Preprint

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“…Both canopy structural diversity and leaf area increased from logged forests to the old forest, because leaf area in both overstorey and understorey layers increased from logged forests to the old forest. Another possible reason is that most latesuccessional species (with lower values in ordination axis 1) are slower growing than pioneer species (with higher values in ordination axis 1) as found in Ma et al (2021), and consistent with previous findings that community composition may have a similar, or greater, influence on productivity than species diversity (Baeten et al, 2019;Tobner et al, 2016). Furthermore, old forests may have stronger interspecific competition (Feng et al, 2014) (Riutta et al, 2018).…”

Section: Discussionsupporting

confidence: 86%

From canopy complementarity to asymmetric competition: The negative relationship between structural diversity and productivity during succession

Wang

Ren

et al. 2021

Journal of Ecology

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1. Positive relationships between structural diversity and forest productivity have been documented in controlled experiments and early secondary forests, however, negative relationships have also been observed in late successional forests.The mechanisms causing observed relationships between structural diversity and productivity are not well-established, but complementarity among crowns and asymmetric competition have been suggested.2. We used LiDAR and repeated census data to examine the relationship between canopy structural diversity and productivity in nine 1-ha subtropical forest plots along a disturbance gradient in southeastern China. We quantified the relative importance of community composition, species diversity, canopy structural diversity, leaf area index (LAI) and disturbance regime on productivity using piecewise structural equation modelling. We also tested how vertical leaf area distribution affected productivity.3. Contrary to many prior observations, we found a negative relationship between canopy structural diversity and forest productivity. The negative effect may stem from asymmetric competition between overstorey and understorey leaves, leading to a lower leaf area efficiency (i.e. wood production per leaf area). Asymmetric competition was suggested by a negative relationship between understorey leaf area and total productivity. Changes in community composition over the disturbance gradient, but not species diversity, had a significant effect on productivity.4. Synthesis. Our study suggests that leaf area and canopy structural diversity have contrasting effects on productivity in this subtropical forest, and this needs to be considered when estimating rates of carbon sequestration in secondary forests.The negative effect of asymmetric competition on productivity is comparable to that of the shift in species composition over succession, highlighting the role of canopy structural diversity in shaping forest productivity.

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“…First we found that broadleaved species (beech, oak) were associated with higher C stocks per unit BA in the aboveground woody biomass and coarse roots than pine as expected (H1). This is similar to findings by Ma et al ( 2021 ) and Torres and Lovett ( 2013 ). Higher C stocks in tree woody biomass per unit BA of the broadleaved species than pine in this study could be attributed to high mean specific wood densities of beech ( Fagus sylvatica ) and oak ( Quercus robur/petraea ) compared with pine (Forrester et al 2017 ; Pretzsch et al 2018 ; Torres and Lovett 2013 ).…”

Section: Discussionsupporting

confidence: 93%

The distribution of carbon stocks between tree woody biomass and soil differs between Scots pine and broadleaved species (beech, oak) in European forests

et al. 2022

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While the impacts of forest management options on carbon (C) storage are well documented, the way they affect C distribution among ecosystem components remains poorly investigated. Yet, partitioning of total forest C stocks, particularly between aboveground woody biomass and the soil, greatly impacts the stability of C stocks against disturbances in forest ecosystems. This study assessed the impact of species composition and stand density on C storage in aboveground woody biomass (stem + branches), coarse roots, and soil, and their partitioning in pure and mixed forests in Europe. We used 21 triplets (5 beech-oak, 8 pine-beech, 8 pine-oak mixed stands, and their respective monocultures at the same sites) in seven European countries. We computed biomass C stocks from total stand inventories and species-specific allometric equations, and soil organic C data down to 40 cm depth. On average, the broadleaved species stored more C in aboveground woody biomass than soil, while C storage in pine was equally distributed between both components. Stand density had a strong effect on C storage in tree woody biomass but not in the soil. After controlling for stand basal area, the mixed stands had, on average, similar total C stocks (in aboveground woody biomass + coarse roots + soil) to the most performing monocultures. Although species composition and stand density affect total C stocks and its partitioning between aboveground woody biomass and soil, a large part of variability in soil C storage was unrelated to stand characteristics. Supplementary Information The online version contains supplementary material available at 10.1007/s10342-022-01453-9.

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Species identity and composition effects on community productivity in a subtropical forest

Cited by 14 publications

References 48 publications

Tree diversity effects on productivity depend on mycorrhizae and life strategies in a temperate forest experiment

Tree diversity effects on productivity depend on mycorrhizae and life strategies in a temperate forest experiment

From canopy complementarity to asymmetric competition: The negative relationship between structural diversity and productivity during succession

The distribution of carbon stocks between tree woody biomass and soil differs between Scots pine and broadleaved species (beech, oak) in European forests

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