Neighborhood effects and environmental variables drive sapling growth in a young subtropical tree plantation

Shen, Zhiqiang; Li, Yuanzhi; Chen, Zhiyi; Zhang, Bingwei; Zhong, Yonglin; Xi, Nianxun; Zhu, Xianhui; Wei, Lin; He, Qing; Luo, Weiwei; Liu, Songling; Wei, Wei; Liu, Hanlun; Jiang, Yun; Wang, Weitao; Chen, Dongxia; Xiao, Junli; Tang, Hui; Li, Buhang; Chu, Chengjin

doi:10.1016/j.foreco.2021.118929

Cited by 5 publications

(4 citation statements)

References 108 publications

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“…However, many mechanistic and simulation models that quantify forest futures continue to deal with single-species stands, simplified dynamics with light and focus largely on tree mortality than regeneration (Hans Pretzsch et al, 2015; Strigul et al, 2008). Our study adds to the understanding of future forest composition through by experimentally disentangling mechanisms that affect early growth stages (Shen et al, 2021; Uriarte et al, 2018). We show that biodiversity effects on biomass gain in early growing stages of long-lived tree species can be modulated by abiotic factors.…”

Section: Discussionmentioning

confidence: 99%

“…Seedling communities planted with higher species richness and under canopies with higher light had higher values of basal area and height after a year of the experiment (Fig. 2) (Sapijanskas et al, 2013; Shen et al, 2021). This demonstrates a potential additive influence of diversity and light on community level seedling growth.…”

Section: Discussionmentioning

confidence: 99%

“…Intraspecific competition plays an integral role in structuring seedling communities and neighbourhood biodiversity can therefore increase growth. Studies with tropical tree species show that species richness and functional diversity in communities has the potential to increase the relative growth rate of individual seedlings and cause overyielding in communities (Kuptz et al, 2010; Sapijanskas et al, 2013; Shen et al, 2021; Van de Peer et al, 2018). Seedling diversity in the neighbourhood can alter seedling root traits directly, altering resource niches and acquisition patterns, and increasing growth at the community level (Madsen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Biodiversity effects on seedling biomass growth are modulated by light environment across functional groups

Anujan

Shabnam²,

Ali³

et al. 2022

Preprint

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Tree biodiversity has the potential to ensure consistency in the functioning of forest ecosystems, not just over space, but over long-timescales by maintaining composition through recruitment. However, for continued buffering in the face of global environmental change, the sensitivity of biodiversity-ecosystem functioning relationships to heterogeneous environments needs to be understood.Seedling recruitment in carbon-rich tropical forests is a result of biotic and abiotic drivers but their combined outcomes at the community-level remain poorly understood. Although biodiversity in seedling communities can potentially increase their growth and biomass accumulation, abiotic drivers like light can alter this effect through divergent effects on constituent species and functional groups. In forests with high baseline heterogeneity in microclimates, these processes can enhance or constrain regeneration.We tested the effects and interactions between species richness and canopy cover on the growth of seedling communities consisting of tropical broad-leaved evergreen and deciduous forest species using a fully crossed manipulated experiment in the Andaman Islands, India and compared these with field observations from a long-term forest plot in the same landscape.We show that in the critical seedling establishment phase, species richness and light increase community biomass independently. Accounting for variation across species, individual species on average accumulated more biomass in communities with both higher light and higher diversity.We also show that overyielding in species rich communities fits expectations from a model of complementarity with non-random overyielding than selection or spatial insurance effects.Synthesis Taken together, our results show that the potential for biodiversity to increase ecosystem functioning in seedling communities is modulated by light. Further understanding on the interaction of biodiversity with multiple abiotic drivers and their effect on regeneration dynamics is crucial for predicting future ecosystem functioning.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biodiversity effects on seedling biomass growth are modulated by light environment across functional groups

Anujan

Shabnam²,

Ali³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…For genetic diversity, however, mostly no effect was reported [e.g. 75,133,134], one negative effect [135], and three positive effects have been shown [114,136,137]. Identity effects were also very important for productivity, with 42 cases finding a significant identity effect [e.g.…”

Section: Direct Tree Diversity Effect On Tree Performance (Pathway 4)mentioning

confidence: 99%

Enhancing Tree Performance Through Species Mixing: Review of a Quarter-Century of TreeDivNet Experiments Reveals Research Gaps and Practical Insights

Depauw,

De Lombaerde,

Dhiedt

et al. 2024

Curr. For. Rep.

Self Cite

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Purpose of Review International ambitions for massive afforestation and restoration are high. To make these investments sustainable and resilient under future climate change, science is calling for a shift from planting monocultures to mixed forests. But what is the scientific basis for promoting diverse plantations, and what is the feasibility of their establishment and management? As the largest global network of tree diversity experiments, TreeDivNet is uniquely positioned to answer these pressing questions. Building on 428 peer-reviewed TreeDivNet studies, combined with the results of a questionnaire completed by managers of 32 TreeDivNet sites, we aimed to answer the following questions: (i) How and where have TreeDivNet experiments enabled the relationship between tree diversity and tree performance (including productivity, survival, and pathogen damage) to be studied, and what has been learned? (ii) What are the remaining key knowledge gaps in our understanding of the relationship between tree diversity and tree performance? and (iii) What practical insights can be gained from the TreeDivNet experiments for operational, real-world forest plantations? Recent Findings We developed a conceptual framework that identifies the variety of pathways through which target tree performance is related to local neighbourhood diversity and mapped the research efforts for each of those pathways. Experimental research on forest mixtures has focused primarily on direct tree diversity effects on productivity, with generally positive effects of species and functional diversity on productivity. Fewer studies focused on indirect effects mediated via biotic growing conditions (e.g. soil microbes and herbivores) and resource availability and uptake. Most studies examining light uptake found positive effects of species diversity. For pests and diseases, the evidence points mostly towards lower levels of infection for target trees when growing in mixed plantations. Tree diversity effects on the abiotic growing conditions (e.g. microclimate, soil properties) and resource-use efficiency have been less well studied to date. The majority of tree diversity experiments are situated in temperate forests, while (sub)tropical forests, and boreal forests in particular, remain underrepresented. Summary TreeDivNet provides evidence in favour of mixing tree species to increase tree productivity while identifying a variety of different processes that drive these diversity effects. The design, scale, age, and management of TreeDivNet experiments reflect their focus on fundamental research questions pertaining to tree diversity-ecosystem function relationships and this scientific focus complicates translation of findings into direct practical management guidelines. Future research could focus on (i) filling the knowledge gaps related to underlying processes of tree diversity effects to better design plantation schemes, (ii) identifying optimal species mixtures, and (iii) developing practical approaches to make experimental mixed plantings more man...

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Spatial-temporal dependence of the neighborhood interaction in regulating tree growth in a tropical rainforest

Weng

Yong

Tang

2022

Forest Ecology and Management

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Neighborhood effects and environmental variables drive sapling growth in a young subtropical tree plantation

Cited by 5 publications

References 108 publications

Biodiversity effects on seedling biomass growth are modulated by light environment across functional groups

Biodiversity effects on seedling biomass growth are modulated by light environment across functional groups

Enhancing Tree Performance Through Species Mixing: Review of a Quarter-Century of TreeDivNet Experiments Reveals Research Gaps and Practical Insights

Spatial-temporal dependence of the neighborhood interaction in regulating tree growth in a tropical rainforest

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