Contribution of plant litter and soil variables to organic carbon pools following tropical forest development after slash‐and‐burn agriculture

Wang, Shaojun; Chen, Minkun; Cao, Run; Cao, Qing; Zuo, Qiting; Wang, Ping; Yang, Bo; Zhao, Shuang

doi:10.1002/ldr.3528

Cited by 13 publications

(5 citation statements)

References 30 publications

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“…The burning process increases formation of soil aggregates (Ngole‐Jeme, 2019; Santín & Doerr, 2016; Thomaz, 2017), when Fe and Ca might be associating with organic matter in soil aggregates and being transformed into compounds such as iron oxide (Fe 2 O 3 ), calcium oxide (CaO) and calcium carbonate (CaCO 3 ). Aggregates are formed by the union of organic and mineral particles that interact and are grouped through soil “cementing” agents such as iron oxide, calcium carbonate and organic matter, providing physical and chemical benefits to the soil (Thomaz, 2021; Wang et al, 2020). By tracking soil regeneration over the months after slash‐and‐burn cultivation in China, Wang et al (2020) observed that iron oxide was determinant for soil carbon stock in the first months after burning.…”

Section: Discussionmentioning

confidence: 99%

“…Aggregates are formed by the union of organic and mineral particles that interact and are grouped through soil “cementing” agents such as iron oxide, calcium carbonate and organic matter, providing physical and chemical benefits to the soil (Thomaz, 2021; Wang et al, 2020). By tracking soil regeneration over the months after slash‐and‐burn cultivation in China, Wang et al (2020) observed that iron oxide was determinant for soil carbon stock in the first months after burning. Soil aggregate stability also increased right after fire in slash‐and‐burn systems in southern Brazil, even without an increase in total soil organic matter contents, as observed by Thomaz (2018).…”

Section: Discussionmentioning

confidence: 99%

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Soil fertility in indigenous swidden fields and fallows in northern Amazonia, Brazil

Pinho

Pequeno

Alfaia

et al. 2023

Soil Use and Management

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In the northern Brazilian Amazon, indigenous peoples who inhabit the savannas of Roraima, plant their crop fields in frequently managed “forest islands” using a rotating “slash‐and‐burn” system. The system advocates long‐term sustainability, but population growth and threats to indigenous lands have led to shorter rotations and greater frequency of use of forest island areas. Our objective was to examine soil texture and fertility (0–20 cm in depth) in indigenous crop fields (roças) and fallow lands (capoeiras, secondary forests), generating recommendations that may help to optimize traditional soil management. Results indicated that roça sites are less acidic than capoeira sites, which was expected as ashes produced by burning are alkalizing, but acidity did not increase again after 8 months of cultivation, and pH was high in all sites (>6). The general increase in nutrients expected in roças compared with capoeiras did not occur. The expected decrease of soil fertility after first months of cultivation did not happen, nor the increase of soil fertility according to fallow length. Overall, soil texture proved to be the main determinant of fertility. The unexpected results suggest that the edaphic processes resulting from the traditional indigenous cultivations, practised for centuries or millennia in this region, likely contributed to the current stabilization of soil acidity and fertility. The stable moderate fertility and stable high pH observed in all sites are advantages for production in slash‐and‐burn systems in this region, and this is especially important for more pressured areas, where agroecological practices could improve soil use and management. Although not determinant for soil fertility recovery at the studied depth (0–20 cm), the fallow period (growth of capoeiras) is still important for recovery of environmental and social functions of forest islands.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Soil fertility in indigenous swidden fields and fallows in northern Amazonia, Brazil

Pinho

Pequeno

Alfaia

et al. 2023

Soil Use and Management

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“…Moreover, wildfires may contribute to the vegetation destruction in southern SWC and central SWC. The ecosystems in these regions are commonly reported to be fire-prone [42][43][44]. Climate warming coupled with human activities such as overgrazing and mining may lead to severe vegetation degradation and desertification in local areas [45].…”

Section: Spatiotemporal Variation Of Ri and Its Driving Factorsmentioning

confidence: 99%

Mapping rainfall interception for assessing ecological restoration sustainability in China

Niu²,

Wei³

et al. 2022

Environ. Res. Lett.

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Ecological restoration (ER) programs play an important role in local and global climate change and carbon management policy interventions. Water resource is a key criterion for assessing the sustainability of ERs. Herein, we explored the spatiotemporal patterns of rainfall interception (RI, an important component of ecosystem water budgets), and its drivers after ER implementation in China. Further, we assessed whether ERs are sustainable by analyzing the trends of RI and water supply. As expected, we found that ERs caused an increase in RI in China from 2001 to 2018 (0.64 mm yr−1, p < 0.01). Changes in the normalized difference vegetation index and leaf area index contributed to a higher change in RI compared with other drivers. The decrease in RI was mainly recorded in the Qinghai–Tibet Plateau in Southwest, northern North, and southern Central and Southern China. Conversely, an increasing trend of RI was recorded in the Loess Plateau in Northwest, Northeast, and East China. Moreover, ERs are not always unsustainable in China, especially in Northeast, East, Central and Southern, and high-latitude regions of northern North China. Even in the Loess Plateau, which was criticized by previous studies, the unsustainability occurred only in the semi-humid region. Future ERs should be prioritized in southern parts of Eastern, Central, and Southern China, and must be appropriately considered in the Northeast and high-latitude regions in North China. It should be alert to the pressures of ERs on water supply, and its demand remains vigilant in the Qinghai–Tibet Plateau and semihumid areas of the Loess Plateau. This study provides new ideas for accurately evaluating the impact of ERs on water security and the sustainability of ERs.

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“…As an important functional component in the forest ecosystem, soil fungi play a vital role in regulating organic matter decomposition [1], nutrient cycling [2], plant diversity, and ecosystem productivity [3,4]. Soil fungal assemblages can be mediated by the alterations in soil and plant characteristics during vegetation community succession [5][6][7][8]. In the process of forest restoration, the increasing colonization of plants and the deepening of root penetration into the soil may elevate vegetation coverage and soil porosity, thereby improving the habitat conditions of the fungi [9,10].…”

Section: Introductionmentioning

confidence: 99%

The Changes, Aggregation Processes, and Driving Factors for Soil Fungal Communities during Tropical Forest Restoration

Guo,

Wang,

Wang

et al. 2023

JoF

Self Cite

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Soil fungal communities play crucial roles in mediating the functional associations between above- and belowground components during forest restoration. Forest restoration shapes the alterations in plant and soil environments, which exerts a crucial effect on soil fungal assemblages. However, the changes, assembly processes, and driving factors of soil fungi communities during tropical forest restoration are still uncertain. We used Illumina high-throughput sequencing to identify the changes of soil fungal communities across a tropical secondary forest succession chronosequence (i.e., 12-, 42-, and 53-yr stages) in Xishuangbanna. During forest restoration, the dominant taxa of soil fungi communities shifted from r- to K-strategists. The relative abundance of Ascomycota (r-strategists) decreased by 10.0% and that of Basidiomycota (K-strategists) increased by 4.9% at the 53-yr restoration stage compared with the 12-yr stage. From the 12-yr to 53-yr stage, the operational taxonomic unit (OTU), abundance-based coverage estimator (ACE), Chao1, and Shannon index of fungal communities declined by 14.5–57.4%. Although the stochastic processes were relatively important in determining fungal assemblages at the late stage, the fungal community assembly was dominated by deterministic processes rather than stochastic processes. The shifts in soil properties resulting from tropical forest restoration exerted significant effects on fungal composition and diversity. The positive effects of microbial biomass carbon, readily oxidizable carbon, and soil water content explained 11.5%, 9.6%, and 9.1% of the variations in fungal community composition, respectively. In contrast, microbial biomass carbon (40.0%), readily oxidizable carbon (14.0%), and total nitrogen (13.6%) negatively contributed to the variations in fungal community diversity. Our data suggested that the changes in fungal composition and diversity during tropical forest restoration were primarily mediated by the positive or negative impacts of soil carbon and nitrogen pools.

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Contribution of plant litter and soil variables to organic carbon pools following tropical forest development after slash‐and‐burn agriculture

Cited by 13 publications

References 30 publications

Soil fertility in indigenous swidden fields and fallows in northern Amazonia, Brazil

Soil fertility in indigenous swidden fields and fallows in northern Amazonia, Brazil

Mapping rainfall interception for assessing ecological restoration sustainability in China

The Changes, Aggregation Processes, and Driving Factors for Soil Fungal Communities during Tropical Forest Restoration

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