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Land Use and Environmental Gradients Influence on Riparian Woody Plant Diversity and Structure in Lake Manyara Watershed Ecosystem, Tanzania

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Open j.urnal of Ecology 2023年第9期13卷 633-648页

作者： Almas Kashindye Richard A. Giliba Mathew M. Mpanda mwemezi j. rwiza j.ma R. Selemani School of Materials Energy Water and Environmental Sciences The Nelson Mandela African Institution of Science and Technology (NM-AIST) Arusha Tanzania Forestry Training Institute (FTI) Arusha Tanzania School of Life Sciences and Bio-Engineering The Nelson Mandela African Institution of Science and Technology Arusha Tanzania EU Delegation to Tanzania Dar es Salaam Tanzania

Riparian vegetations are important in supporting ecological connectivity between aquatic and terrestrial ecosystems. The structure and species composition of riparian woody plants have been subj.cted to multiple forces with varying degree of influences. This study examined the influence of land use and environmental gradient to the structure and composition of the riparian woody plants in northern Tanzania. A total of 270 plots were surveyed for woody plant species in the riparian ecosystems and later analysed to determine the influence of land use categories (homegarden, crop field, woodlot, open canopy forest, and closed canopy forest) and environmental variables (temperature, precipitation, elevation and slope) to the species richness, abundance, and stand parameters. Basal area was higher in woodlots, homegardens and crop fields than in the open and closed canopy forests;and as expected the reverse was true for the number of stocking density. Correlation among stand parameters with environmental variables varied significantly. Species richness and species abundance were negatively correlated to precipitation, temperature and elevation, while stocking density and basal area were positively correlated to precipitation. The study recommends continual retentions of trees on farm, further promoting of agroforestry interventions and sustainable utilization of woody plants in open and close canopy forests.

关键词： Water Basin Forest Disturbance Riparian Forests Rift Valley Savannah

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Structure modeling of activated carbons used for simulating methane adsorption-A review

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Petroleum Research 2023年第1期8卷 103-117页

作者： j.hn rwiza Rugarabamu Dongfeng Zhao Shi Li Rui Diao Kunli Song College of Chemical Engineering China University of Petroleum(East China)ShandongQingdao266580China College of Earth Sciences and Engineering The University of DodomaDodomaTanzania

Activated carbons(ACs)are highly porous materials with a broad range of applications in industry such as gas storage,water and air purification,gas separation,and *** microstructure for ACs is still not clearly known in spite of their wide industrial *** have been efforts to describe the structure of activated carbons experimentally in relation to its methane adsorption *** this review,it is assumed that natural gas is sorely composed of CH_(4)for simplicity(because CH_(4)is the maj.r component,>90%).Experimental means to unveil the microstructure and many other properties for these ACs have some limitations,to overcome these limitations,ACs structural modeling and simulation become very important to match the properties with the desired methane adsorption *** maj.r challenge that methane adsorption simulation faces for so long,is the lack of realistic AC *** paper reviews the current efforts to develop the realistic AC models for methane adsorption,most of the built models are based on experimental carbon structural findings from the previous *** structural parameters including pore size distribution(PSD),specific surface area(SSA),pore volume and extent of curvature in the carbon materials and their role to methane adsorption are *** role of chemical properties,such as presence of functional groups and the nature of the functional groups to the adsorption properties of methane,are also *** pore morphologies(such as slit pore,platelet,spherical,etc.)are studied with their effect on methane adsorption and presented *** is found that each of the mentioned parameters has its own bearing to methane ***,this work analyzes different current techniques used in modeling natural gas adsorption,and the mechanisms are able to reproduce the specific carbon materials for a certain desired set of adsorption *** future works are also recommended in this

关键词： Activated carbon Activated carbon model Methane adsorption and adsorption simulation

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