Transformation of rural landscapes in the Vietnamese Mekong Delta from 1990 to 2019: a spatio-temporal analysis

Nguyen, Ho; Trung, Ta Hoang; Phan, Duong Cao; Tran, Thong Anh; Ly, Nguyen Thi Hai; Nasahara, Kenlo Nishida; Prishchepov, Alexander V.; Hölzel, Norbert

doi:10.1080/10106049.2022.2086623

Cited by 8 publications

(8 citation statements)

References 85 publications

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“…The history of agricultural cultivation impacts soil organic matter decomposition through soil nutrient status, pH, or decomposer community [28]. At present, most of the cultivated areas in the upper VMD are used for rice, cash crop and orchard cultivations [16]. The fluvial plain was exploited by farmers before Vietnam's transition towards an open market economy (Doi Moi policy) in 1986 because of its advantages such as fluvial deposition, irrigation, and well-drained soil.…”

Section: Effect Of Agricultural Land-use Patterns On Soc and Soc Stockmentioning

confidence: 99%

“…In the upper VMD, the area devoted to double rice cropping and triple rice cropping quickly expanded, while seasonal rice diminished by 28% [14]. Besides, thanks to the high dike system and good drainage, some areas along the Mekong River (also known as Tien River) and Bassac River (also known as Hau River) converted from rice fields into orchards or other upland crops in recent years [15,16]. Currently the conversion of agricultural landuse patterns is still happening due to the influence of agricultural policy, market prices, infrastructure, dike system, and changes in hydrological regime.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Agricultural Land-Use Patterns on Soil Organic Carbon Stock in the Upper Vietnamese Mekong Delta

Ly¹,

Nguyen²,

Anh³

et al. 2022

Pol. J. Environ. Stud.

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In the mitigation strategies of climate change, improving soil carbon storage is considered as one of the main tasks to enhance agricultural sustainability and sequester atmospheric carbon dioxide. Agricultural patterns have been changing significantly and causing many impacts on soil organic carbon (SOC) storage in the upper Vietnamese Mekong Delta (VMD). Therefore, this study aims to evaluate how typical agricultural pattern changes are affecting SOC by estimating the SOC stock and identifying the correlation with soil physic-chemical properties. Soil samples were collected in both depths of 0-20 cm and 20-50 cm and analyzed physic-chemical properties such as soil texture, bulk density, pH KCl , EC and SOC. In topsoil layers, the SOC stock of the wetland forest was the highest in the opened depression of floodplain (24.42±1.38 kg C m -2 ; p<0.05) while that of paddy rice was the richest at depth of 20-50 cm (27.69±2.97 kg C m -2 ; p<0.05). In other agro-ecological areas, SOC stock in croplands was lower than forest and grassland in topsoil layer, especially in mountainous areas. SOC stock correlated positively with SOC content, clay, bulk density, and EC (p<0.05) but had a negative correlation with sand and pH KCl (p<0.05). The decrease in SOC stock in dry cultivating patterns indicated the impact of agricultural management practices and soil fertility on SOC storage. Thus, improving SOC stock

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Section: Effect Of Agricultural Land-use Patterns On Soc and Soc Stockmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Agricultural Land-Use Patterns on Soil Organic Carbon Stock in the Upper Vietnamese Mekong Delta

Ly¹,

Nguyen²,

Anh³

et al. 2022

Pol. J. Environ. Stud.

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“…Although this study focused on forests, dung beetles were used as indicators because of their sensitivity to anthropogenic disturbance and their importance in performing essential ecological functions in terrestrial ecosystems. Another study used spatio-temporal dynamics analysis using Landsat images and a supervised random forest classifier to measure the transformation of rural landscapes in the Vietnamese Mekong Delta [19]. Finally, Sugimoto et al [20] used scattering power decomposition and optimal averaging of volume scattering power in tropical rainforest regions to assess deforestation.…”

Section: Introductionmentioning

confidence: 99%

Methods for economic assessment of forest resource degradation: A systematic review

Sourokou,

Vodouhe,

Yabi

2024

Nat. Resour. Conserv. Res.

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Forest degradation is one of the challenges facing the planet today. Several methods have been used to measure forest degradation, including spatiotemporal model analysis, satellite analysis, remote sensing, time series data, geospatial techniques, and most recently aerial drone imagery. However, few studies have used economic valuation methods to assess forest degradation. Therefore, this research aimed to identify the methods used the economic assessment of forest degradation. This systematic review was carried out using PRISMA guidelines. Research articles on the economic valuation of forest resource loss, published from 2015 to 2022, were electronically collected from three databases. Three independent reviewers, with the third acting as referee, inventoried articles, extracted data, and assessed the risk of bias in the articles included in the study. A total of 10,095 articles were identified, including one article from the grey literature. Only five articles met the eligibility criteria. A qualitative content analysis was performed on the extracted data. The selected articles used various methods. However, only a few articles used the contingent valuation method, even though this is indicated for estimating the highest economic value of forests. Based on forest functions, the articles evaluated erosion due to the absence of trees, wood loss, recreation areas and externalities due to forest loss, air quality, water regulation, food supply, and wildlife. The main limitation of this review was the small number of studies included, which may have affected the findings. The study protocol is registered in PROSPERO under the number CRD42021223242

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“…Moreover, LXQ is known for its high biodiversity, with seasonal floodplain grasslands, natural forests on mountains and limestone hills, coastal wetlands, conserving and supporting various ecosystems such as mangroves, floodplain grasslands, mountain and riverside ecosystems. However, over the past three decades, LXQ has undergone significant changes under the influences of climate change and human intervention, aiming to convert natural ecosystems for different land uses and altering the ecological environment and natural landscape of this region (Funkenberg et al, 2014;Huu Nguyen et al, 2016;Nguyen, Trung, et al, 2022;Tuu et al, 2013). Notably, since the 2000 flood, numerous dykes have been constructed to protect and increase the rice-growing area in the region (Tuu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

<span>Assessing the impact of land-use/land-cover change on provisioning ecosystem services in the Long Xuyen Quadrangle from 2000 to 2021</span>

Nguyen,

Pham

et al. 2024

Dong Thap University Journal of Science

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Changes in land use/land cover (LULC) have a significant impact on the changes in ecosystem service values. This study aims to assess the impacts of LULC changes on provisioning ecosystem services (pES) in the Long Xuyen Quadrangle region (LXQ) from 2000 to 2021. Using Landsat 5 TM and Landsat 8 OLI imagery, this study analyzes the normalized difference vegetation index (NDVI) time series using MODIS imagery to monitor and evaluate the impacts of LULC changes in the LXQ region. Additionally, interviews with farmers were conducted to estimate the ecosystem service values of different rice cultivation models. The research results in the creation of LULC maps for the LXQ in 2000 and 2021, with relatively high reliability, including overall accuracy (OA) of 83.18% (K = 0.772) and 94.26% (K = 0.9284), respectively. The main LULC change observed in the LXQ region from 2000 to 2021 is the conversion from wetlands to double-cropped rice and triple-cropped rice systems. The study identified an area of 54,667.722 ha (26.24%) where wetlands were converted to double-cropped rice, and an area of 36,779.633 ha (17.65%) where wetlands were converted to triple-cropped rice. Furthermore, the estimated ecosystem service values after the conversion from wetlands to triple-cropped rice were approximately 122,504,931 VND/ha/year, and for double-cropped rice, it was approximately 87,772,604.88 VND/ha/year. The research findings indicate that wetland agriculturalization, including double-cropped rice and triple-cropped rice, has affected the ecosystem service provision in the LXQ region. These research results provide significant considerations for future comprehensive valuation of ecosystem service values in the LXQ, Vietnamese MD.

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Transformation of rural landscapes in the Vietnamese Mekong Delta from 1990 to 2019: a spatio-temporal analysis

Cited by 8 publications

References 85 publications

Effect of Agricultural Land-Use Patterns on Soil Organic Carbon Stock in the Upper Vietnamese Mekong Delta

Effect of Agricultural Land-Use Patterns on Soil Organic Carbon Stock in the Upper Vietnamese Mekong Delta

Methods for economic assessment of forest resource degradation: A systematic review

<span>Assessing the impact of land-use/land-cover change on provisioning ecosystem services in the Long Xuyen Quadrangle from 2000 to 2021</span>

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