Effects of tree species richness on fine root production varied with stand density and soil nutrients in subtropical forests

Zeng, Weixian; Xiang, Wenhua; Zhou, Bo; Ouyang, Shuai; Zeng, Yelin; Chen, Liang; Zhao, Lijuan; Valverde‐Barrantes, Oscar J.

doi:10.1016/j.scitotenv.2020.139344

Cited by 17 publications

(13 citation statements)

References 68 publications

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“…The results of this study suggest that this promotional effect was weakened with increasing stand density. Soil P content decreased with increasing density, which is consistent with results reported previously (He et al 2005;Zeng et al 2020). This may be because N-fixation is accompanied by high energy costs and increases the P demand required to synthesize the energy product ATP, a molecule that carries energy within cells (Reed et al 2011;Schleuss et al 2020).…”

Section: Changes In Soil and Leaf Traits Along The Stand Density Gradientsupporting

confidence: 92%

“…Stand density determines stand spatial structure and directly affects the distribution of light, heat, moisture, and other ecological factors affecting the growth of individual trees and of the plantation (Cai et al 2016;Hakkenberg et al 2016;Bo et al 2018). The effect of stand density on fine root dynamics has been studied in natural forests coupled with species richness (He et al 2005;Marquard et al 2009;Zeng et al 2020). In plantations, the effects of stand density on fine root biomass, production, and turnover rate have been reported less frequently.…”

Section: Introductionmentioning

confidence: 99%

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Response of density-related fine root production to soil and leaf traits in coniferous and broad-leaved plantations in the semiarid loess hilly region of China

et al. 2021

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Fine roots are the most active and functional component of root systems and play a significant role in the acquisition of soil resources. Density is an important structural factor in forest plantations but information on changes in fine roots along a density gradient is limited. In this study, plantations of black locust (Robinia pseudoacacia L.) and Chinese pine (Pinus tabuliformis Carr.) with four density classes were analyzed for the influence of soil and leaf traits on fine root growth. Fine root biomass increased with stand density. High fine root biomass was achieved through increases in the fine root production and turnover rate in the high-density black locust plantations and through an increase in fine root production in the pine plantations. In the high-density Chinese pine stand, there was a high fine root turnover which, coupled with high fine root production, contributed to a high fine root biomass. Overall, fine root production and turnover rate were closely related to soil volumetric water content in both kinds of plantations, while fine root biomass, especially the component of necromass, was related to soil nutrient status, which refers to phosphorous content in black locust plantations and nitrogen content in Chinese pine plantations. There was a close linkage between leaf area index and fine root dynamics in the black locust plantations but not in the pine plantations.

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Section: Changes In Soil and Leaf Traits Along The Stand Density Gradientsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Response of density-related fine root production to soil and leaf traits in coniferous and broad-leaved plantations in the semiarid loess hilly region of China

et al. 2021

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“…Numerous studies have shown that root dynamics could be highly sensitive to environmental factors and plant community characteristics, such as soil nutrient contents (McNickle and Brown 2014 ; Majdi and Pa 2005 ; Kou et al 2018 ), stand conditions (Brassard et al 2011 ; Finér et al 2011 ; Ma and Chen 2017 ; Lepik et al 2020 ; Zeng et al 2020 ), and competition with neighbors (Casper et al 1997 ; Beyer et al 2013 ; Cahill and James 2003 ). However, few studies have explored the divergent responses of fine roots between functional groups to environmental conditions and plant communities.…”

Section: Introductionmentioning

confidence: 99%

“…Despite this, the relationship between plant species diversity and root turnover is still elusive, in part because methodological limitations make root dynamics relatively difficult to estimate. Many studies have indicated that plant species diversity positively affects both above- and belowground productivity in multiple ecosystem types due to “overyielding” (Brassard et al 2011 ; Ma and Chen 2016 ; Ouyang et al 2019 ; Zeng et al 2020 ). Two mechanisms have been proposed to explain this phenomenon.…”

Section: Introductionmentioning

confidence: 99%

“…Another hypothesis is the selection probability effect, which proposes that higher species richness improves productivity by increasing the chances of possessing high-yielding species (Špaèková and Lepš 2001 ; Schmid et al 2008 ). Most research on the relationship between plant species diversity and root productivity has tended to support the complementarity effect rather than the selection probability effect (Brassard et al 2011 ; Zeng et al 2020 ; Jing et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of stand condition and root density on fine-root dynamics across root functional groups in a subtropical montane forest

Huang

Zhao

et al. 2022

J. For. Res.

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Fine roots play key roles in belowground C cycling in terrestrial ecosystems. Based on their distinct functions, fine roots are either absorptive fine roots (AFRs) or transport fine roots (TFRs). However, the function-based fine root dynamics of trees and their responses to forest stand properties remain unclear. Here, we studied the dynamics of AFRs and TFRs and their responses to stand conditions and root density in a subtropical montane mixed forest based on a 2-a root window experiment. Mean (± SE) annual production, mortality, and turnover rate of AFRs were 7.87 ± 0.17 m m−2 a−1, 8.13 ± 0.20 m m−2 a−1and 2.96 ± 0.24 a−1, respectively, compared with 7.09 ± 0.17 m m−2 a−1, 4.59 ± 0.17 m m−2 a−1, and 2.01 ± 0.22 a−1, respectively, for TFRs. The production and mortality of fine roots were significantly higher in high root-density sites than in low-root density sites, whereas the turnover of fine roots was faster in the low root-density sites. Furthermore, root density had a larger positive effect than other environmental factors on TFR production but had no obvious impact on AFR production. Tree species diversity had an apparent positive effect on AFR production and was the crucial driver of AFR production, probably due to a complementary effect, but had no evident impact on TFR. Both tree density and tree species diversity were positively correlated with the mortality of AFRs and negatively related to the turnover of TFRs, suggesting that higher root density caused stronger competition for rooting space and that plants tend to reduce maintenance costs by decreasing TFR turnover. These findings illustrated the importance of root functional groups in understanding root dynamics and their responses to changes in environmental conditions.

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Spatial distribution of fine root traits in relation to soil properties and aggregate stability of intensively managed Moso bamboo (Phyllostachys edulis) plantations in subtropical China

Ni,

2024

Plant Soil

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Effects of tree species richness on fine root production varied with stand density and soil nutrients in subtropical forests

Cited by 17 publications

References 68 publications

Response of density-related fine root production to soil and leaf traits in coniferous and broad-leaved plantations in the semiarid loess hilly region of China

Response of density-related fine root production to soil and leaf traits in coniferous and broad-leaved plantations in the semiarid loess hilly region of China

Effects of stand condition and root density on fine-root dynamics across root functional groups in a subtropical montane forest

Spatial distribution of fine root traits in relation to soil properties and aggregate stability of intensively managed Moso bamboo (Phyllostachys edulis) plantations in subtropical China

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