Long-term structural and functional changes in Acacia mangium plantations in subtropical China

Ren, Hai; Fan, Yiming; Zou, Zeyuan; Hui, Dafeng; Guo, Qinfeng; Huang, Yao

doi:10.1007/s11355-020-00429-4

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Tree species such as Eucalyptus and Acacia are frequently selected in afforestation practices due to their fast‐growing or N‐fixing features (Ren et al, 2007). Currently, most of these plantations have low productivity and low biodiversity, and therefore provide inadequate forest goods and ecosystem services (Ren et al, 2021). Silviculture managements such as introducing indigenous plant species of different functional groups into the established plantations are needed to increase plant community diversity and improve ecosystem functions (Kimball et al, 2014; Su et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Leaf nutrient resorption differs among canopy and understory plant species in subtropical Eucalyptus and Acacia plantations

et al. 2022

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Although plants are known to conserve nutrients by resorbing them from senescing leaves, how resorption of foliar macro‐ and micronutrients is affected by plant growth form (e.g., trees, shrubs, and ferns) and forest age are not well understood. The current study was conducted in four subtropical monoculture plantations: Eucalyptus and Acacia plantations in 14 and 35 years old, respectively. Leaf resorption efficiencies (REs) and resorption proficiencies (RPs) of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and manganese (Mn) of the canopy trees and understory shrubs and ferns were determined. N, P, and K but not Ca and Mn were generally resorbed from senescing leaves. RE was significantly higher for P than N, indicating that P was more limiting than N in the subtropical plantations. Nutrient REs did not differ with plantation age, while nutrient RPs generally tended to be lower in the 14‐year‐old than in the 35‐year‐old plantations. REs significantly differed among canopy and understory plant species with different growth forms, that is, NRE, PRE, and KRE values were much higher in woody plants (especially the canopy tree species) than in ferns. REs were correlated with foliar nutrient concentrations but not with soil nutrient concentrations. Our findings suggest that resorption of nutrients from senescing leaves differs among canopy and understory plants, and implicate that introducing native tree species into these plantations could be implemented for accelerating the community succession and further improving the multifunctionality.

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Section: Introductionmentioning

confidence: 99%

Leaf nutrient resorption differs among canopy and understory plant species in subtropical Eucalyptus and Acacia plantations

et al. 2022

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“…Planted and naturalizing stands of shadeintolerant introduced tree species of acacias facilitate the establishment of shade-tolerant native forest species (Geldenhuys et al 2017). Similarly, an Acacia plantation in a subtropical zone has slowly transformed into a natural forest after 34 years of development because of the gradual increase in plant diversity (Ren et al 2020).…”

Section: Resultsmentioning

confidence: 99%

Long-term changes in floristic diversity, composition and stand structure in Acacia auriculiformis plantation in Mount Makiling Forest Reserve, Philippines

Hernandez

ATA²,

COMBALICER³

2022

Biodiversitas

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Abstract. Hernandez JO, Ata JP, Combalicer MS. 2022. Long-term changes in floristic diversity, composition and stand structure in Acacia auriculiformis plantation in Mount Makiling Forest Reserve, Philippines. Biodiversitas 23: 3631-3638. There have been continuous debates about whether exotic tree plantation facilitates vegetation succession. In the Philippines, the potential for the re-establishment of native plant communities and improvement of the plant community structure under exotic tree plantations has not yet been evaluated adequately. Thus, the study investigated the dynamics in floristic diversity, composition and stand structure of a reforested area using Acacia auriculiformis Benth. in Sitio Kay Inglesia, Mount Makiling Forest Reserve (MMFR), Philippines. The changes in basal area, stem density, biomass growth, species diversity, species evenness and richness, and canopy closure were determined between two study periods, i.e., 1993-2008 and 2009-2019. Results revealed significant changes in stem density (i.e., 1324 to 2135 trees ha-1) and canopy closure (i.e., 18% to 10%) for mature trees and seedlings/saplings in 2009-2019. The changes in basal area and aboveground biomass were not significant between the two study periods. The species richness was significantly higher in 2009-2019 (i.e., 55 species) than in 1993-2008 (i.e., 22 species). The species diversity also significantly increased from low (i.e., H' = 1.99, S = 23) to moderate (i.e., H' = 2.88, S = 55). Moreover, the number of exotics decreased (i.e., 60 to 40% or 15 to 9 species) as the number of native ones increased (i.e., 27 to 72% or 15 to 40 species). Therefore, the findings of the present study show that re-establishment of native species is possible when restoring degraded land with A. auriculiformis plantation. However, monitoring studies on other key ecosystem attributes (e.g., ecosystem functionality, external exchanges, structural diversity) of the plantation are recommended to enhance our understanding of the species' potential for restoration.

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“…However, it should be noted that longterm growth patterns vary greatly between and within tree species (Brienen and Zuidema, 2006;Rozendaal and Zuidema, 2011). Ren (2020) reported that the biomass growth of acacia trees in Chinese forest plantations was rapid (from 1.60 to 185.01 tons/ha) during the rst 7 years, and then decreased (to 188.69 tons/ha) during the next 27 years.…”

Section: Growth Ratesmentioning

confidence: 99%

Evaluation of biomass and vegetative characteristics of mesquite (Prosopis juliflora) afforestation in arid area of Iran

Hosseinzadeh,

Heydari,

Ehsani

et al. 2024

Preprint

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Evaluating the degree of success in the growth, effectiveness and durability or replacement of pioneer afforestation in dry areas of the world is one of the important issues of managing these forests. We evaluated the suitability of mesquite for afforesting degraded lands in the dry climate region of Einkhosh, Ilam province, Iran by studying the influence of stand density (180 and 250 trees per ha) and age (15, 27 and 34 years) on tree development, growth and biomass, and soil quality in. We measured tree characteristics (height, crown height, collar diameter and crown area) and calculated above-ground biomass. Soil quality index was determined at two depths (0–15 and 15–30 cm) based on the measured physical, chemical and biological soil properties. The results showed that stand age and density and their interaction significantly affected stem number, crown height growth and soil quality index. The average number of stems was the highest (7.8 per hectare) in the 15-year-old stand and the lowest (1.5 per hectare) in the 34-year-old stand. Height, collar diameter, basal area growth, biomass, and competition between trees were significantly affected by stand age and its interaction with stand density (p < 0.01). The average annual growth of tree collar diameter and height with age was lowest (4.1 mm per year and 17.7 cm per year, respectively) in the 34-year-old stand. In contrast, average annual growth rates of 7.2 mm and 31 cm for collar diameter and height, respectively, in the 15-year-old stand. The surface soil quality index increased with the stand age and density, and it was highest (averaging 0.714) in the dense areas of the 34-year-old stand. In contrast, soil quality index at lower soil depths, decreased with increasing stand age, but it was still highest in the dense areas of the 34-year-old stand. The basal area at the stem collar showed a positive and strong correlation with total height, crown height, degree of competition and crown area. In general, high density mesquite afforestation plantings (250 trees per hectare) in this dry and desert area improved soil quality and increased vegetative and productivity characteristics of mesquite, especially as stands aged. Therefore, mesquite can be a suitable option for revitalization of sites in dry and sparsely vegetated areas.

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Long-term structural and functional changes in Acacia mangium plantations in subtropical China

Cited by 5 publications

References 22 publications

Leaf nutrient resorption differs among canopy and understory plant species in subtropical Eucalyptus and Acacia plantations

Leaf nutrient resorption differs among canopy and understory plant species in subtropical Eucalyptus and Acacia plantations

Long-term changes in floristic diversity, composition and stand structure in Acacia auriculiformis plantation in Mount Makiling Forest Reserve, Philippines

Evaluation of biomass and vegetative characteristics of mesquite (Prosopis juliflora) afforestation in arid area of Iran

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