Local management practices influence the viability of the baobab (Adansonia digitata Linn.) in different land use types, Cinzana, Mali

2004 ◽  
Vol 101 (1) ◽  
pp. 85-103 ◽  
Author(s):  
Shivcharn S Dhillion ◽  
Gunnar Gustad
Keyword(s):  
Land Use ◽  
Management Practices ◽  
Adansonia Digitata ◽  
Local Management ◽  
Land Use Types

scholarly journals Rainforest-to-pasture conversion stimulates soil methanogenesis across the Brazilian Amazon

2020 ◽  
Author(s):  
Marie E. Kroeger ◽  
Laura K. Meredith ◽  
Kyle M. Meyer ◽  
Kevin D. Webster ◽  
Plinio Barbosa de Camargo ◽  
...  
Keyword(s):  
Land Use ◽  
Greenhouse Gas ◽  
Management Practices ◽  
Carbon Sink ◽  
Brazilian Amazon ◽  
Stable Isotope Probing ◽  
Methane Cycling ◽  
Agricultural Conversion ◽  
Land Use Types ◽  
Pasture Conversion

ABSTRACTThe Amazon rainforest is a biodiversity hotspot and large terrestrial carbon sink that is threatened by agricultural conversion. Rainforest-to-pasture conversion leads to the release of a potent greenhouse gas by converting soil from a methane sink into a source. The biotic methane cycle is driven by microorganisms; therefore, this study focused on active methane-cycling microorganisms and their functions across land-use types. We collected intact soil cores from three land use types (primary rainforest, pasture, and secondary rainforest) of two geographically distinct areas of the Brazilian Amazon (Santarém, Pará and Ariquemes, Rondônia) and performed DNA stable-isotope probing coupled with metagenomics to identify the active methanotrophs and methanogens. At both locations, we observed a significant change in the composition of the isotope-labeled methane-cycling microbial community across land use types, specifically an increase in the abundance and diversity of active methanogens in pastures. We conclude that a significant increase in the abundance and activity of methanogens in pasture soils could explain the greater methane flux. Furthermore, we found that secondary rainforests recovered as methane sinks, indicating the potential for reforestation to offset greenhouse gas emissions in the tropics. These findings are critical for informing land management practices and global tropical rainforest conservation.

scholarly journals On Spatial Management Practices: Revisiting the "Optimal" Use of Urban Land

2018 ◽  
Vol 26 (3) ◽  
pp. 24-34 ◽  
Author(s):  
Marek Ogryzek ◽  
Radoslaw Wisniewski ◽  
Tom Kauko
Keyword(s):  
Land Use ◽  
Urban Space ◽  
Management Practices ◽  
Urban Land ◽  
Decision Making Process ◽  
Characteristic Matrix ◽  
Land Use Type ◽  
Spatial Analyses ◽  
Land Use Types ◽  
Spatial Management

Abstract The article takes a fresh look at the concept of the "optimal" use of urban land. It discusses the procedure for choosing the "optimal" use of land within the context of rational spatial management practices and sets out a model solution for determining "optimal" land use types for given spatial and functional situations. A necessary set of geoinformation for informed decisions on choosing the "optimal" land use type is proposed. The study adds to the available knowledge concerning spatial analyses and simulations of "optimal" zoning processes; in doing so it applies the characteristic matrix method for inducing the optimal use of an area to diagnose the value of urban space and, in this way, to determine the "optimal" use under given circumstances. The article concludes by stating that the algorithm for selecting the "optimal” land use of an area significantly improves the decision-making process when carrying out the transformation of land use - the most important instrument for planning optimisation and organisation.

scholarly journals Soil quality evaluation under different land use types in Kersa sub-watershed, eastern Ethiopia

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Yared Mulat ◽  
Kibebew Kibret ◽  
Bobe Bedadi ◽  
Muktar Mohammed
Keyword(s):  
Land Use ◽  
Soil Quality ◽  
Quality Indicators ◽  
Management Practices ◽  
Land Uses ◽  
Grazing Land ◽  
Data Set ◽  
Eastern Ethiopia ◽  
Land Use Types ◽  
Significant Difference

Abstract Background Soil quality, which can be inferred using indicators that interact synergistically, is affected by land use types and agricultural management practices. This study assessed the status of soil quality under three adjacent land uses (cultivated, grazing, and fallow) in Kersa subwatershed (622 ha). Soil samples were collected from the surface soil (0–20 cm depth) of the identified land uses with three replications and the soil quality parameters were analyzed. A minimum data set of soil quality indicators were selected from physical, chemical, and biological parameters using the literature review and expert opinion method. Linear scoring functions were used to give the unitless scores for the selected data sets, which were then integrated into a soil quality index (SQI). Results The results revealed that bulk density, aggregate stability, pH, cation exchange capacity (CEC), available P, and soil organic carbon (SOC) had a significant difference in SQI among the different land uses. The soil quality indices were 0.69 for grazing land, 0.62 for cultivated land, and 0.59 for the fallow land. The SQI of all the land uses falls in the intermediate soil quality (0.55 < SQI < 0.70) class. Conclusion In almost all the quality indicators assessed, the grazing land was superior to the cultivated and fallow lands. Therefore, implementing management practices that enhance soil quality like organic matter-controlled systems is imperative for sustainable agricultural production in the study area.

scholarly journals Soil Quality Evaluation Under Different Land Use Types in Kersa Sub-watershed, Eastern Ethiopia

2021 ◽  
Author(s):  
Yared Mulat Tefera ◽  
kibebew Kibret Tehaye ◽  
Bobe Bobe Bedadi ◽  
Muktar Mohammed Kedir
Keyword(s):  
Land Use ◽  
Soil Quality ◽  
Quality Indicators ◽  
Management Practices ◽  
Land Uses ◽  
Grazing Land ◽  
Data Set ◽  
Eastern Ethiopia ◽  
Land Use Types ◽  
Significant Difference

Abstract Background: Soil quality, which can be inferred using indicators that interact synergistically, is affected by land use types and agricultural management practices. This study assessed the status of soil quality under three adjacent land uses (cultivated, grazing, and fallow) in Kersa subwatershed (622 ha). Soil samples were collected from the surface soil (0-20 cm depth) of the identified land uses with three replications and the soil quality parameters were analyzed. A minimum data set of soil quality indicators were selected from physical, chemical, and biological parameters using the literature review and expert opinion method. Linear scoring functions were used to give the unitless scores for the selected data sets, which were then integrated into a soil quality index (SQI).Results: The results revealed that bulk density, aggregate stability, pH, cation exchange capacity (CEC), available P, and soil organic carbon (SOC) had a significant difference in SQI among the different land uses. The soil quality indices were 0.69 for grazing land, 0.62 for cultivated land, and 0.59 for the fallow land. The SQI of all the land uses falls in the intermediate soil quality (0.55 < SQI < 0.70) class.Conclusion: In almost all the quality indicators assessed, the grazing land was superior to the cultivated and fallow lands. Therefore, implementing management practices that enhance soil quality like organic matter-controlled systems is imperative for sustainable agricultural production in the study area.

scholarly journals Rainforest-to-pasture conversion stimulates soil methanogenesis across the Brazilian Amazon

2020 ◽  
Author(s):  
Marie E. Kroeger ◽  
Laura K. Meredith ◽  
Kyle M. Meyer ◽  
Kevin D. Webster ◽  
Plinio Barbosa de Camargo ◽  
...  
Keyword(s):  
Land Use ◽  
Greenhouse Gas ◽  
Forest Restoration ◽  
Management Practices ◽  
Brazilian Amazon ◽  
Stable Isotope Probing ◽  
Methane Cycling ◽  
Agricultural Conversion ◽  
Land Use Types ◽  
Pasture Conversion

Abstract The Amazon rainforest is a biodiversity hotspot and large terrestrial carbon sink threatened by agricultural conversion. Rainforest-to-pasture conversion stimulates the release of methane, a potent greenhouse gas. The biotic methane cycle is driven by microorganisms; therefore, this study focused on active methane-cycling microorganisms and their functions across land-use types. We collected intact soil cores from three land use types (primary rainforest, pasture, and secondary rainforest) of two geographically distinct areas of the Brazilian Amazon (Santarém, Pará and Ariquemes, Rondônia) and performed DNA stable-isotope probing coupled with metagenomics to identify the active methanotrophs and methanogens. At both locations, we observed a significant change in the composition of the isotope-labeled methane-cycling microbial community across land use types, specifically an increase in the abundance and diversity of active methanogens in pastures. We conclude that a significant increase in the abundance and activity of methanogens in pasture soils could drive increased soil methane emissions. Furthermore, we found that secondary rainforests had decreased methanogenic activity similar to primary rainforests, and thus a potential to recover as methane sinks, making it conceivable for forest restoration to offset greenhouse gas emissions in the tropics. These findings are critical for informing land management practices and global tropical rainforest conservation.

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