Simulating the Effect of Permanent Preservation Areas on Soil Erosion Rates

Lense, Guilherme Henrique Expedito; Moreira, Rodrigo Santos; Parreiras, Taya Cristo; Silva, Luis Felipe Pigatto Miranda; Teodoro, Alexandre Elias de Miranda; Mincato, Ronaldo Luiz

doi:10.1590/01047760202026022692

Cited by 3 publications

(3 citation statements)

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“…Additionally, riparian forests are considered to be areas of permanent preservation under Brazilian legislation (BRASIL 2012). Both riparian and terra-firme habitats are important in the provision of ecosystem services, such as pollination, production of fruit and seeds, carbone storage, regulation of the hydrological cycle and prevention of erosion and silting (Martins 2014;Mello et al 2016;Lense et al 2020). Both types of forest fragments may also provide important ecological corridors for the dispersal of bee populations, contributing to the maintenance of gene flow and the structure of assemblages, and reducing the potential for local extinction (Souza et al 2010;Storti et al 2013;Gray et al 2016;Lense et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Orchid bees in riparian and terra-firme forest fragments in an urban matrix in southwestern Brazilian Amazonia

2021

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Riparian forests are important ecosystems that support an enormous biodiversity in Brazil. Despite being protected under Brazilian legislation, these forests suffer great impact from the fragmentation of habitats. Orchid bees are a key group of pollinators in the Neotropical region, yet few data are available on the assamblage structure of these bees in riparian forests. We evaluated the role of fragments of riparian and terra-firme forest on the conservation and maintenance of orchid bees in an urban landscape in the southwestern Amazon basin. Specifically, we evaluated whether bee assemblages in riparian and terra-firme forests differed significantly in abundance, species richness and composition. We also evaluated whether species richness and abundance of bees vary with the size of the forest fragment. Male bees were attracted using odoriferous baits and collected with entomological nets in 10 forest fragments. There was no significant difference between riparian and terra-firme fragments in species abundance, richness and composition, but there was a positive correlation between fragment size and species richness and abundance. Our results suggest that, in an urban landscape, the remaining riparian and terra-firme forest fragments still could maintain 62.7% of the orchid bee species known to occur in the region, reinforcing the conservation value of these forest remnants. Our findings indicate that these fragments provide a potentially important habitat for the maintenance of local bee populations in the landscape.

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Section: Discussionmentioning

confidence: 99%

Orchid bees in riparian and terra-firme forest fragments in an urban matrix in southwestern Brazilian Amazonia

2021

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“…Between 1988 and 2008, the vast majority of areas with declivity above 20% (200 ha), which were occupied with corn cultivated under conventional tillage were replaced by coffee and reforestation crops (Figure 5), which resulted in a reduction of 146.50 Mg year -1 in soil losses. Temporary crops grown in the steepest areas can make the soil more susceptible to runoff, and therefore these areas should be a priority for the adoption of erosion mitigation measures and for planning the appropriate land use in order to reduce the erosion process (BESKOW et al, 2009;CHEN et al, 2019;LENSE et al, 2020 , Brazil, in the years 1988, Brazil, in the years , 1998, Brazil, in the years , 2008, Brazil, in the years and 2018 The study pointed out that, despite the soil loss reduction, high erosion rates still occur in the study area, mainly on access roads and corn cultivation (Figure 4 -2018). Therefore, to ensure the long-term sustainability of the production system, soil conservation practices should be expanded, even to site with very slight erosion.…”

Section: Temporal-spatial Distribution Of Soil Erosion In the Coroadomentioning

confidence: 99%

Effect of Spatial-Temporal Variation of Land Use and Land Cover on Soil Erosion

et al. 2021

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Land use and land cover changes are the main factors of human influence on the erosive process. Thus, this work aimed to evaluate the effect of land use and land cover changes over 30 years on water erosion in a tropical subbasin in southeastern Brazil. The hypothesis was tested that the expansion of coffee and reforestation areas decreased soil losses due to water erosion. The Potential Erosion Method (EPM) was used to estimate water erosion in 1988, 1998, 2008 and 2018. In the first two decades, the predominant land use in the subbasin was corn, while in 2008 and 2018, coffee and reforestation areas became the main land use class in the area. The acquisition of EPM input parameters and data analysis was performed using remote sensing techniques and the Geographic Information System. Between 1988 and 1998, the total soil loss increased by 50.36 Mg year-1 due to the conversion of pasturelands to coffee plantations and the increase of deforestation. However, between 1998 and 2018, there was a soil loss reduction of 660.21 Mg year-1 (-37.46%), once the conversion of pasture and corn areas to coffee with the adoption of conservation practices, and the expansion of reforestation areas among 1988 - 2018, contributed to the decrease of soil erosion rates.

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“…Soil erosion is one of the most significant forms of land (soil truncation, loss of fertility, slope instability) and is greatly influenced by biodiversity, land use and management (Solaimani et al, 2009;Spalevic et al, 2013;Behzadfar et al, 2014;Chalise et al, 2018;Lense et al, 2020;Spalevic et al, 2020;Spalevic et al, 2021;Stefanidis et al, 2022). It is likely to be exacerbated by extensive human activities and global warming (Rosas and Gutierrez, 2019), and is a serious problem in developing countries (Chalise et al, 2019;Khaledi Darvishan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Identification of Erosion Critical Areas Based on Soil Erodibility and Terrain Influence Factors in the Iranian Part of the Caspian Sea Basin

HAJI¹,

DARVISHAN²,

Mostafazadeh³

2022

AgricultForest

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Understanding the contribution of different land uses in soil erosion leads to optimal management and conservation practices to reduce the severity of erosion and consequently, the sustainable management. Changeability of the most effective factors on soil erosion especially soil erodibility and topography in different land uses is a first step to have a general view of soil erosion in the watersheds. Therefore, the present research was carried out to study the soil erodibility (S) and terrain influence (T) factors in different land uses in the Iranian part of the Caspian Sea Basin and identification of erosion critical areas based on topography and soil erodibility factors. In order to prepare land use, S and T maps for the study area, were prepared by using satellite data of moderate resolution imaging spectroradiometer (MODIS), shuttle radar topography mission (SRTM 90m) and harmonized world soil database (HWSD) and the use of geographic information system (GIS) and remote sensing (RS), respectively. The results showed that the mean soil erodibility in the Iranian part of the Caspian Sea Basin varied from zero (soilless areas) to 0.044 (t ha hr ha -1 MJ -1 mm -1 ). While, among eight studied land use, the highest and lowest mean values of soil erodibility were obtained in the rangeland and permanent snow-water body equal to 0.040 and zero (t ha hr ha -1 MJ -1 mm -1 ), respectively. Also, the mean terrain influence (T) factor varied from 0.01 to 35.83 and shows more changeability in the study basin. As a result, by considering the high soil erodibility and terrain influence, the maximum erosion potential in the study area are located in the middle parts of the basin, where the highest slope gradients have high soil erodibility values. These areas are mainly located in the south slopes of the Alborz mountains. In this regard, defined critical regions based on topography and soil erodibility factors along with natural and anthropogenic factors can be considered in the planning of soil erosion control in watersheds and soil and water conservation programs.

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Simulating the Effect of Permanent Preservation Areas on Soil Erosion Rates

Abstract: The watershed does not have riparian forests around most of the watercourses. The watershed has areas with soil losses above tolerable limits. Areas with higher vegetation cover had lower soil losses.

Cited by 3 publications

References 24 publications

Orchid bees in riparian and terra-firme forest fragments in an urban matrix in southwestern Brazilian Amazonia

Orchid bees in riparian and terra-firme forest fragments in an urban matrix in southwestern Brazilian Amazonia

Effect of Spatial-Temporal Variation of Land Use and Land Cover on Soil Erosion

Identification of Erosion Critical Areas Based on Soil Erodibility and Terrain Influence Factors in the Iranian Part of the Caspian Sea Basin

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