scholarly journals Vegetation Dynamics in the Northern Zones of Niger: Case of the Rural Commune of Tanout (Zinder) and Aderbissinat (Agadez)

2021 ◽  
Vol 2 (1) ◽  
pp. 30-36
Author(s):  
Abdoul Kader Soumaila Sina ◽  
Nouhou Ali ◽  
Amadou Garba ◽  
Bernard Minoungou
Keyword(s):  
Land Use ◽  
Vegetation Dynamics ◽  
Methodological Approach ◽  
Woody Species ◽  
Woody Vegetation ◽  
Landsat Images ◽  
Floristic Inventory ◽  
Northern Zone ◽  
The Impact ◽  
Land Use Maps

The present study conducted in the northern zone of Niger aims to show the impact of land use dynamics on woody vegetation. The methodological approach consisted in making in addition to the floristic surveys, the analysis of land use maps (LANDSAT images of the years 1975 and 2018). The floristic inventory allowed the identification of twenty-seven (27) woody species of which eleven (11) in Tanout and sixteen (16) in Aderbissinat. The most important families remain the Fabaceae-Mimosoideae which represent 37.5% at Aderbissinat and 45.45% at Tanout. The biological types remain dominated by microphanerophytes which dominate (86.67%), while for the phytogeographic types it is the Sudano-Zambezian and Sudanian species that dominate, with proportions respectively equal to 31.25%. There is a regression of woody vegetation at the level of these communes with a slight loss in Aderbissinat (60588,034 ha) and an accentuated degradation of vegetation in Tanout (781797,738 ha).

scholarly journals The influence of the 1991/92 drought on the woody vegetation of the Kruger National Park

Koedoe ◽  
1995 ◽  
Vol 38 (2) ◽  
Author(s):  
A.J. Viljoen
Keyword(s):  
National Park ◽  
Woody Species ◽  
Aerial Photographs ◽  
Woody Vegetation ◽  
General Area ◽  
Variable Intensity ◽  
The North ◽  
Olifants River ◽  
Area North ◽  
The Impact

All observations and data related to the impact of the 1991/92 drought on the woody vegetation, excluding the riverine vegetation of major rivers, are summarised. This includes data from a visual estimate of damage from aerial photographs, surveys on selected sites, and general observations. Despite lower rainfall, the area north of the Olifants River (excluding the far-northern part) was less affected than the area south of it, suggesting that the woody vegetation in the north is more adapted to drought. A characteristic of the drought was the localised distribution pattern and variable intensity of damage to the same species in the same general area. Information on 31 species are presented briefly. Although a large number of woody species was to some extent damaged, when the woody vegetation is considered as a whole, the influence of the drought was not very severe.

scholarly journals Assessing the Impacts of Land Use and land cover change on Pastoral Livestock Farming in South-Eastern Burkina Faso

2016 ◽  
Vol 6 (1) ◽  
pp. 110 ◽  
Author(s):  
Sophie A. KIMA ◽  
A. A OKHIMAMHE ◽  
Andre KIEMA
Keyword(s):  
Land Use ◽  
Burkina Faso ◽  
Information Source ◽  
Fuel Wood ◽  
Landsat Images ◽  
Livestock Farming ◽  
Poor Access ◽  
Livestock Farmers ◽  
Landsat Satellite ◽  
The Impact

<p class="1Body">Conversion of pastures to cropland is one of the most important issues facing livestock farming in Burkina Faso. This study examined the impact of land use/cover change on pastoral livestock farming in Boulgou province between 1980 and 2013. Landsat satellite images (1989, 2001 and 2013) and socio-economic data were analysed. The interpretation of the classified Landsat images revealed an increase in cropland from 20.5% in 1989 to 36.7% in 2013. This resulted mainly from the conversion of woody savannah and shrub and grass savannah to cropland. Pastoral livestock farmers reported that the major drivers of vegetation loss were drought (95.1 %), population growth (91.8%), cropland increase (91.4%), extraction of fuel wood (69.8%) and increase in livestock population (65.4). These changes affect livestock farming through reduction of pasture, poor access to water and reduction of livestock mobility routes according to the farmers. This calls for regional and national policies to protect grazing areas in Burkina Faso that are similar to policies being implemented for forest and other types of vegetation cover in other countries. For such pastoral policies to be successful, issues concerning the mobility of livestock farmers must be enshrined into such policies and this study is an example of information source for these policies.</p>

scholarly journals Determination of environmental problems of agricultural nature management based on modular geochemical indicators

2020 ◽  
Vol 28 (1) ◽  
pp. 57-64
Author(s):  
Almobarak Falak ◽  
Lidia A. Mezhova
Keyword(s):  
Land Use ◽  
Natural Resources ◽  
Soil Quality ◽  
Agricultural Land ◽  
Methodological Approach ◽  
Arable Land ◽  
Animal Husbandry ◽  
Environmental Problems ◽  
Nature Management ◽  
The Impact

Central Chernozem is one of the largest agricultural regions in Russia. As a result of the long period of natural resources use the anthropogenic load on agricultural lands is increasing. The result of agricultural nature management is the increase of land degradation processes. Voronezh Region has a high agro-climatic potential, most of the territory is occupied by agricultural land, arable land prevails among them. Soil degradation is the most acute problem. There is a need to assess the impact of agricultural natural resources use on land resources of the region. Modular coefficients for assessment of geochemical impact of agriculture and animal husbandry on agricultural systems are proposed. The developed factor is a tool for identification of negative land use processes and environmental problems. The article deals with the issues of ecologically oriented, scientifically grounded strategy of agricultural nature management. Ecological approach to assessment of soil quality in the future will develop a strategy for balanced land use. The article has a scientific and practical character and is aimed at the development of methods of ecological assessment of soil quality. The proposed methodological approach identifies destructive processes in soils. For ecologically oriented strategy of development of regions it is important to define maximum allowable agricultural loads for preservation of sustainable environment.

scholarly journals An Assessment of Multiple Drivers Determining Woody Species Composition and Structure: A Case Study from the Kalahari, Botswana

Land ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 122 ◽  
Author(s):  
Meyer ◽  
Holloway ◽  
Christiansen ◽  
Miller ◽  
D’Odorico ◽  
...  
Keyword(s):  
Species Abundance ◽  
Woody Species ◽  
Environmental Variable ◽  
Woody Vegetation ◽  
Tobit Regression ◽  
Species Identity ◽  
Rainfall Gradient ◽  
Composition And Structure ◽  
Species Richness And Abundance ◽  
The Impact

Savannas are extremely important socio-economic landscapes, with pastoralist societies relying on these ecosystems to sustain their livelihoods and economy. Globally, there is an increase of woody vegetation in these ecosystems, degrading the potential of these multi-functional landscapes to sustain societies and wildlife. Several mechanisms have been invoked to explain the processes responsible for woody vegetation composition; however, these are often investigated separately at scales not best suited to land-managers, thereby impeding the evaluation of their relative importance. We ran six transects at 15 sites along the Kalahari transect, collecting data on species identity, diversity, and abundance. We used Poisson and Tobit regression models to investigate the relationship among woody vegetation, precipitation, grazing, borehole density, and fire. We identified 44 species across 78 transects, with the highest species richness and abundance occurring at Kuke (middle of the rainfall gradient). Precipitation was the most important environmental variable across all species and various morphological groups, while increased borehole density and livestock resulted in lower bipinnate species abundance, contradicting the consensus that these managed features increase the presence of such species. Rotating cattle between boreholes subsequently reduces the impact of trampling and grazing on the soil and maintains and/or reduces woody vegetation abundance.

scholarly journals Representation of fire, land-use change and vegetation dynamics in the Joint UK Land Environment Simulator vn4.9 (JULES)

2019 ◽  
Vol 12 (1) ◽  
pp. 179-193 ◽  
Author(s):  
Chantelle Burton ◽  
Richard Betts ◽  
Manoel Cardoso ◽  
Ted R. Feldpausch ◽  
Anna Harper ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Land Cover ◽  
Vegetation Cover ◽  
Land Surface ◽  
Vegetation Dynamics ◽  
Fire Disturbance ◽  
Substantial Contribution ◽  
Surface Model ◽  
The Impact

Abstract. Disturbance of vegetation is a critical component of land cover, but is generally poorly constrained in land surface and carbon cycle models. In particular, land-use change and fire can be treated as large-scale disturbances without full representation of their underlying complexities and interactions. Here we describe developments to the land surface model JULES (Joint UK Land Environment Simulator) to represent land-use change and fire as distinct processes which interact with simulated vegetation dynamics. We couple the fire model INFERNO (INteractive Fire and Emission algoRithm for Natural envirOnments) to dynamic vegetation within JULES and use the HYDE (History Database of the Global Environment) land cover dataset to analyse the impact of land-use change on the simulation of present day vegetation. We evaluate the inclusion of land use and fire disturbance against standard benchmarks. Using the Manhattan metric, results show improved simulation of vegetation cover across all observed datasets. Overall, disturbance improves the simulation of vegetation cover by 35 % compared to vegetation continuous field (VCF) observations from MODIS and 13 % compared to the Climate Change Initiative (CCI) from the ESA. Biases in grass extent are reduced from −66 % to 13 %. Total woody cover improves by 55 % compared to VCF and 20 % compared to CCI from a reduction in forest extent in the tropics, although simulated tree cover is now too sparse in some areas. Explicitly modelling fire and land use generally decreases tree and shrub cover and increases grasses. The results show that the disturbances provide important contributions to the realistic modelling of vegetation on a global scale, although in some areas fire and land use together result in too much disturbance. This work provides a substantial contribution towards representing the full complexity and interactions between land-use change and fire that could be used in Earth system models.

scholarly journals Germany’s Agricultural Land Footprint and the Impact of Import Pattern Allocation

2021 ◽  
Author(s):  
Klaus Josef Hennenberg ◽  
Swantje Gebhardt ◽  
Florian Wimmer ◽  
Martin Distelkamp ◽  
Christian Lutz ◽  
...  
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Methodological Approach ◽  
Hybrid Approach ◽  
Ecosystem Functions ◽  
Land Conversion ◽  
Environmental Goods ◽  
Global Average ◽  
The Impact

Footprints are powerful indicators for evaluating the impact of the bioeconomy of a country on environmental goods, domestically and abroad. In this study, we apply a hybrid approach combining a Multi-Regional Input-Output model and land use modelling to compute the agricultural land footprint (aLF). Furthermore, we added information on land-use change to the analysis and allocated land conversion to specific commodities. The German case study shows that the aLF abroad is larger by a factor of 2.5 to 3 than the aLF in Germany. In 2005 and 2010, conversion of natural and semi-natural land-cover types abroad allocated to Germany due to import increases was 2.5 times higher than the global average. Import increases to Germany slowed down in 2015 and 2020, reducing land conversion attributed to the German bioeconomy to the global average. The case study shows that the applied land footprint provides clear and meaningful information for policymakers and other stakeholders. The presented methodological approach can be applied to other countries and regions covered in the underlying database EXIOBASE. It can be adapted, also for an assessment of other ecosystem functions, such as water or soil fertility.

scholarly journals Dynamique spatio-temporelle de l’occupation des sols des communes de Torodi, Gothèye et Tagazar de la région de Tillabéry au Niger

2020 ◽  
Vol 14 (3) ◽  
pp. 949-965
Author(s):  
Ibrahim Biga ◽  
Abdou Amani ◽  
Idrissa Soumana ◽  
Mourtala Bachir ◽  
Ali Mahamane
Keyword(s):  
Land Use ◽  
Temporal Dynamics ◽  
Landsat Images ◽  
Entire Study ◽  
Energy Wood ◽  
Spatio Temporal ◽  
Sentinel 2A ◽  
Bodies Of Water ◽  
Entire Study Area ◽  
Land Use Maps

L’homme à travers ses actions dénature fortement l’occupation des sols engendrant une modification du milieu naturel. Cet impact rend la nécessité de fournir aux autorités communales les cartes d’occupations des sols et des informations relatives à leurs état et dynamique. C’est dans cette optique qu’une étude de l’occupation des sols a été conduite dans trois communes de l’Ouest Nigérien. Elle a pour objectif de cartographier et d’analyser la dynamique de l’occupation des sols de ces communes à partir des images Landsat de 1984 et 2000 et celles de sentinelle 2A de 2017. La classification supervisée par maximum de vraisemblance a été appliquée et la dynamique a été analysée à partir des courbes et des calculs de superficies. Les résultats cartographiques ont permis l’établissement des cartes d’occupation des sols par commune. L’analyse de la dynamique de l’occupation des sols montre que les superficies des formations végétales et les jachères régressent sur l’ensemble de la zone d’étude. Les cultures et bâtis progressent respectivement de 180,96% et 119, 81% à Torodi, 65,69% et 205,42% à Tagazar et 98,82% et 143,15% à Gothèye. IL en est de même pour les zones dégradées et les plans d’eau qui connaissent des progressions et des régressions sur l’ensemble de la zone d’étude. Les L’agriculture, l’exploitation du bois d’énergie et la démographie sont les principaux facteurs de dégradation et de mutation du paysage. Ces résultats peuvent servir de base pour définir les zones prioritaires en vue de la restauration des zones dégradées et l’aménagement des formations naturelles.Mots clés : Télédétection, SIG, Cartographie, dégradation.   English Title: Spatio-temporal dynamics of the land use of Torodi, Gothèye and Tagazar township in the Tillabery region of NigerMan through his actions strongly distorts the use of land, causing a change in the natural environment. This impact makes it necessary to provide municipalities with land use maps and information relating to their condition and dynamics. It is with this in mind that a study of land use was carried out in three communes in western Niger. Its objective is to map and analyze the dynamics of the land use of these municipalities from the Landsat images of 1984 and 2000 and those of sentinel 2A from 2017. The supervised classification by maximum likelihood was applied and the dynamics was analyzed from curves and area calculations. The cartographic results made it possible to draw up land use maps by municipality. Analysis of the dynamics of land use shows that the areas of plant formations and fallows are declining over the entire study area. Crops and buildings rose respectively by 180.96% and 119, 81% in Torodi, 65.69% and 205.42% in Tagazar and 98.82% and 143.15% in Gothèye. The same is true for degraded areas and bodies of water which are experiencing increases and regressions over the entire study area. Agriculture, the exploitation of energy wood and demography are the main factors of degradation and mutation of the landscape. These results could serve as a basis for defining priority intervention areas for the restoration of degraded areas and the management of agroforestry forests and parks. Keywords: Remote sensing, GIS, Cartography, degradation.  

scholarly journals Assessing the Effect of Land Use Change on Surface Runoff in a Rapidly Urbanized City: A Case Study of the Central Area of Beijing

Land ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 17 ◽  
Author(s):  
Shanshan Hu ◽  
Yunyun Fan ◽  
Tao Zhang
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Correlation Analysis ◽  
Surface Runoff ◽  
Flood Control ◽  
Central Area ◽  
Dominant Factor ◽  
Landsat Images ◽  
Rapid Urbanization ◽  
The Impact

The change in land use during the process of urbanization affects surface runoff and increases flood risk in big cities. This study investigated the impact of land use change on surface runoff in Beijing’s central area during the period of rapid urbanization from 1984 to 2019. Land use maps of 1984, 1999, 2009, and 2019 were generated by image classification of Landsat images. Surface runoffs were calculated with the Soil Conservation Service curve number (SCS-CN) model. Correlation analysis was used to identify the dominant factor of land use change affecting surface runoff. The result showed that the variation trend of surface runoff was consistent with the trend of impervious land in Beijing’s central area, which increased during 1984~2009 and decreased during 2009~2019. Correlation analysis showed that changes in surface runoff were most strongly correlated with changes in impervious surfaces when compared with the correlation of runoff with other types of land use. The results of this study may provide a reference for city flood control and urban planning in fast growing cities worldwide, especially in developing countries.

scholarly journals Ecological and economic assessment of military land use efficiency in the context of environmental security

2020 ◽  
pp. 29-41
Author(s):  
A. Tretiak ◽  
N. Tretiak ◽  
Yu. Lobunko ◽  
M. Tretiak ◽  
A. Melnichuk
Keyword(s):  
Land Use ◽  
Methodological Approach ◽  
Economic Assessment ◽  
Environmental Safety ◽  
Environmental Security ◽  
Land Use Efficiency ◽  
Land Relations ◽  
Use Efficiency ◽  
Military Facilities ◽  
The Impact

The aim of the study is to present the results of a methodological approach to environmental and economic assessment of land use efficiency in the context of environmental safety of the population within the territories where military facilities are located (on the example of land use within the Desnyansk united territorial community). As a result of the study, the authors presented a methodological approach to environmental and economic assessment of land use efficiency in the development of land relations, as well as in the context of environmental safety of the population of the territories where military facilities are located. According to the proposed methodological approach, the impact of military facilities and risks to the ecological instability of land use and anthropogenic impact on the territories, and, accordingly, the threat to the environmental safety of the population. The ecological and economic assessment of the efficiency of military land use substantiated by the authors allows to carry out appropriate measures for ecological safety in relation to public welfare.The scientific novelty of the work lies in the further application of theoretical, methodological and practical provisions that determine the ecological, economic and institutional principles of military land use in the context of environmental security, in particular in the development of land relations. Because this is one of the first studies, which is devoted to the environmental and economic assessment of land use efficiency in the context of environmental safety of life within the territories where military facilities are located.The authors believe that the significance of the declared study lies in the fact that ensuring the environmental safety of the population of the territories where military facilities are located through the prevention of dangerous situations, remains the main way to solve environmental, economic, and social problems.

scholarly journals Effects of Human Impact on Miombo Woodland in Northern Malawi

2010 ◽  
Vol 13 ◽  
pp. 22-34
Author(s):  
Tina Vanadis Bundschuh ◽  
Rüdiger Wittig ◽  
Karen Hahn
Keyword(s):  
Plant Diversity ◽  
Rural Population ◽  
Vegetation Type ◽  
Woody Species ◽  
Wild Plants ◽  
Wild Plant ◽  
Woody Vegetation ◽  
Miombo Woodland ◽  
Wild Plant Species ◽  
The Impact

Miombo woodland is found throughout the Zambezian regional centre of endemism where most of the rural population make use of its wild plant species. This article presents the results of a study on the composition of the woody vegetation and its anthropogenous alteration in northern Malawi with particular respect to the impact caused by the collection of wild plants. The main vegetation type in this area is miombo woodland which is composed of 80 woody species. The collection of wild plants does not show an effect on the plant diversity but effects are visible in the decreasing number of tall trees.

Sign in / Sign up

Export Citation Format

Share Document