Dynamics of Understory Shrub Biomass in Six Young Plantations of Southern Subtropical China

Chen, Yuanqi; Chen, Xian; Zhang, Yanju; Rao, Xingquan; Fu, Shenglei

doi:10.3390/f8110419

Cited by 11 publications

(5 citation statements)

References 46 publications

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“…These berry shrubs are an important component of forest ecosystems in terms of productivity and diversity. They can drive ecosystem processes such as ecosystem carbon cycling, increase forest carbon sink, and reduce water loss and soil erosion [2]. Furthermore, forest animals rely on berry crops for foraging [3].…”

Section: Introductionmentioning

confidence: 99%

Influences of Shading on Ascorbic Acid Biosynthesis of Blackcurrant (Ribes nigrum L.)

Gang

Zhang

Sun

et al. 2022

Forests

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Cultivation conditions may greatly affect fruit quality, especially in the accumulation of functional metabolites. Blackcurrant fruits (Ribes nigrum L.) have high ascorbic acid (AsA) concentrations. The purpose of the current study was to investigate the influence of different shading treatments (full sunlight, and 40% and 60% sunlight) on the fruits’ maturity, and on the levels of fruit firmness, soluble solid, AsA, and enzyme activity involved in AsA biosynthesis and recycling in two blackcurrant (Ribes nigrum) cultivars, ‘Heifeng’ and ‘Adelinia’. Shading conditions of 40% and 60% sunlight delayed fruit ripening and increased fruit firmness in both ‘Adelinia’ and ‘Heifeng’. Soluble solids in ‘Adelinia’ were markedly reduced by shading compared with ‘Heifeng’. Compared with full sunlight, the AsA content was significantly decreased in the ripe fruits under the 40% and 60% shading treatments. Additionally, the AsA content was decreased during the fruit development process under the 60% shading treatment, which was associated with the reduced activity of the enzymes monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glutathione oxidoreductase (GR), ascorbate peroxidase (APX), and L-galactose dehydrogenase (GalDH) involved in the biosynthesis and recycling pathway of AsA. The correlation analysis results showed that the activity of MDHAR, DHAR, GR, APX, and GalDH was significantly positively correlated with AsA concentrations during the 60% shading treatment in ‘Adelinia’ and ‘Heifeng’ fruits, suggesting that AsA biosynthesis and recycling were affected and the two cultivars have similar mechanisms to deal with shading. Our results not only provide a better understanding of the regulation mechanism of AsA accumulation under shading, but also provide a theoretical basis for taking effective cultivation measures aimed at the improvement of AsA levels in blackcurrant fruits.

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Section: Introductionmentioning

confidence: 99%

Influences of Shading on Ascorbic Acid Biosynthesis of Blackcurrant (Ribes nigrum L.)

Gang

Zhang

Sun

et al. 2022

Forests

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“…The spatial variation of soil respiration has been widely reported in grassland [23], cropland [24], as well as forest ecosystems [25], and is influenced by a set of interacting environmental and physiological variables. Forest ecosystem is characteristic by its complex vertical structure, showing three different functional groups: trees, shrubs, and herbs [26,27]. The presence of shrub and herb is always negatively related to canopy cover of trees, thus plays an important role in forest ecosystem, especially in the area with open canopy [28].…”

Section: Introductionmentioning

confidence: 99%

Effects of Understory Shrub Biomass on Variation of Soil Respiration in a Temperate-Subtropical Transitional Oak Forest

Yan-chun

Shang

Wang

et al. 2019

Forests

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Quantification of the temporal and spatial variations of soil respiration is an essential step in modeling soil carbon (C) emission associated with the spatial distribution of plants. To examine the temporal and spatial variations of soil respiration and its driving factors, we investigated soil respiration, microclimate, and understory vegetation in a 50 m × 70 m plot in a climatic transitional zone oak forest in Central China. The temporal variation of soil respiration based on the 21 measurements ranged from 15.01% to 30.21% across the 48 subplots. Structural equation modeling showed that soil temperature and understory shrub biomass had greater positive effects on the seasonal variability of soil respiration. The spatial variation of soil respiration of the 48 subplots varied from 3.61% to 6.99% during the 21 measurement campaigns. Understory shrub biomass and belowground fine root biomass positively regulated the spatial variation of soil respiration. Soil respiration displayed strong spatial autocorrelation, with an average spatial correlation length of 20.1 m. The findings highlight the importance of understory shrub and belowground biomass in regulating the temporal and spatial heterogeneity of soil respiration in forest ecosystems, and the need to carefully address it to robustly estimate the contribution of soil C emission in terrestrial C cycling.

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“…The soil is classified as a yellow-brown sandy-loam soil (Miao et al, 2019). The vegetation at the experimental site is dominated by Morus alba Linn., Liquidambar formosana Hance, Diospyros kaki Thunb, and Quercus acutissima Carruth (Chen, Cai, Zhang, Rao, & Fu, 2017). aboveground biomass estimated by allometric equations, respectively.…”

Section: Study Sitementioning

confidence: 99%

Herbivory effects on leaf litter decomposition vary with specific leaf area in temperate mixed deciduous forest

Liu

Yang

et al. 2020

Land Degrad Dev

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Insect herbivory has great impact on biogeochemical cycling in forest ecosystems, but experimental tests on the herbivory‐decomposability relationships at the interspecific level are rare. We conducted a 400‐day field decomposition experiment in a temperate mixed deciduous forest and measured mass remaining rate, decomposition constant, total loss of carbon (C) and nitrogen (N) of leaf litter with/without obvious damage by chewing insects for different tree species. We found that herbivory effect on initial litter quality (C:N ratio) varied with species, leading to a substantial decrease for Morus alba (−5.78%) and an enhancement for Quercus acutissima (+5.35%). Herbivory damage increased the decomposition constant for M. alba and Liquidambar formosana with higher specific leaf area (SLA), but decreased it for Diospyros kaki and Q. acutissima with lower SLA. These contrasting effects of insect herbivory on litter decomposition could be attributed to the differential responses of litter initial quality (C:N ratio) of each species to herbivory damage. Herbivory‐induced decline of leaf C:N ratio could increase the decomposition constant of species with higher SLA. Our finding that herbivory damage showed interspecific variability in both litter quality and decomposition rate suggests that insect herbivore‐induced feedbacks to nutrient cycling and ecosystem function should be estimated at the species level in multispecies mixed deciduous forest.

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Dynamics of Understory Shrub Biomass in Six Young Plantations of Southern Subtropical China

Cited by 11 publications

References 46 publications

Influences of Shading on Ascorbic Acid Biosynthesis of Blackcurrant (Ribes nigrum L.)

Influences of Shading on Ascorbic Acid Biosynthesis of Blackcurrant (Ribes nigrum L.)

Effects of Understory Shrub Biomass on Variation of Soil Respiration in a Temperate-Subtropical Transitional Oak Forest

Herbivory effects on leaf litter decomposition vary with specific leaf area in temperate mixed deciduous forest

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