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29 results for “Sahel”
Uncovering dryland woody dynamics using optical, microwave, and field data: Prolonged above-average rainfall paradoxically contributes to woody plant die-off in the western Sahel
<p>Data accompanying the paper:</p> <p>Bernardino, P., Brandt, M., De Keersmaecker, W., Horion, S., Fensholt, R., Storms, I., Wigneron, JP., Verbesselt, J. and Somers, B. 2020. Uncovering dryland woody dynamics using optical, microwave, and field data: Prolonged above-average rainfall paradoxically contributes to woody plant die-off in the western Sahel. <em>Remote Sensing</em>, 12(14), 2332.</p>
Site data and PLFA obtained along a rainfall and soil type gradient in the Sahel region of West Africa 2019-2020 (PRJNA930013)
<p>The Sahel of West Africa is a vulnerable biome that is experiencing rapid population growth, agricultural intensification, and soil degradation that threatens food security. A potential solution is intercropping with the indigenous shrub, <em>Guiera senegalensis</em>, that coexists with crops to varying degrees in farmers’ fields throughout the Sahel. Previous research of the Optimized Shrub-intercropping System (OSS) with <em>G. senegalensis</em> (high density of ~1200 1500 shrubs ha<sup>-1</sup> ) with annual incorporation of coppiced residue) has been shown to dramatically improve pearl millet (<em>Pennisetum glaucum</em>) yield; attributed in part to improved soil quality, nutrient availability, water use efficiency and harboring a distinct and active microbial community that may confer benefits to surrounding crops. Whether this microbial response is consistent over a climate and soil type gradient in farmers’ fields has not been investigated. Therefore, the objective was to determine the microbiomes and metabolic pathways of millet root zone soil in the presence or absence of <em>G. senegalenis</em>, sampled along a north-south soil and rainfall gradient in farmers’ fields. The experimental design was a completely randomized 3 X 2 factorial (2 landscape replications) with the following treatments: three rainfall (450 to 750 mm per annum)/soil type gradient sites north to south in the Senegal Peanut Basin and two sampling location treatments (millet root zone soil within and outside the influence of the <em>G.</em> <em>senegalensis</em>). <em>G. senegalensis</em> shifted certain predicted bacterial metabolic pathways and enriched certain bacterial and fungal genera, some of which are known to have plant growth promoting properties. These positive shrub effects were most evident at the northern site that has low rainfall and low organic matter soils. Here we share soil chemical, plant and PLFA datasets obtained in the 2019- 2020 sampling seasons and related to metagenomic data publicly available via NCBI PRJNA930013.</p>
An Unexpectedly Large Count of Trees in the West African Sahara and Sahel
This dataset provides georeferenced polygon vectors of individual tree canopy geometries for dryland areas in West African Sahara and Sahel that were derived using deep learning applied to 50-cm resolution satellite imagery. More than 1.8 billion non-forest trees (i.e., woody plants with a crown size over 3 m2) over about 1.3 million km2 were identified from panchromatic and pansharpened normalized difference vegetation index (NDVI) images at 0.5-m spatial resolution using an automatic tree detection framework based on supervised deep-learning techniques. Combined with existing and future fieldwork, these data lay the foundation for a comprehensive database that contains information on all individual trees outside of forests and could provide accurate estimates of woody carbon in arid and semi-arid areas throughout the Earth for the first time.
Location and Permanency of Water Bodies in the African Sahel Region from 2003-2011
This data set provides an estimate of the spatial and temporal extent of surface water at 250-m resolution over nine years (2003-2011) for the African Sahel region (10-20 degrees N) using imagery from the Moderate-resolution Imaging Spectroradiometer (MODIS). Water bodies were identified by a spectral analysis of MODIS vegetation indices with the aim to improve existing regional to global mapping products. This data set can be used to enhance the understanding of Earth system processes, and to support global change studies, agricultural planning, and disease prevention. These data provide a gridded (250-m) estimate of the number of years (during 2003-2011) that a pixel was covered by water. The data are presented in a single netCDF (*.nc) file.
Resilience of patterned vegetation in the Sahel - network centrality data
Input data for a time-series analysis of the connectedness of vegetation from several locations within the Sahel. The analysis uses NDVI images from the Sentinel 2 satellite, from ESA's Copernicus program, downloaded from Google Earth Engine.
MDA and Targeted Control Against Plasmodium Carriage in the Sahel
ClinicalTrials.gov study NCT07281443. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Sahel dataset
Open the record for dataset details and reuse information.
On following pages: 229. Sahel Duiker (Sylvicapra pallidion; 230. Crowned Duiker (Sylvicapra coronata); 231. Maxwell's Duiker (Philantomba maxwell); 232. Verheyen's Duiker (Philantomba walter). in Bovidae
On following pages: 229. Sahel Duiker (Sylvicapra pallidion; 230. Crowned Duiker (Sylvicapra coronata); 231. Maxwell's Duiker (Philantomba maxwell); 232. Verheyen's Duiker (Philantomba walter).
The baobab trees density over sahel (500m)
<p>500m resolution map of baobab trees over arid and semi-arid region of West Africa belt. This is aggregated by a wall to wall map of baobab trees derived by deep learning model and very high resolution satellite imagery for 2010s.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.