TY  - JA
AU  - Turner,M.D.
AU  - Butt,B.
AU  - Singh,A.
AU  - Brottem,L.
AU  - Ayantunde,A.
AU  - Gerard,B.
TI  - Variation in vegetation cover and livestock mobility needs in Sahelian West Africa
SN  - 1747-423X
PY  - 2016///
CY  - USA
PB  - Taylor & Francis
KW  - Ecology
KW  - AGROVOC
KW  - Rangelands
KW  - Climate change
KW  - Mali
N1  - Peer review; CCAFS
N2  - A new approach was developed to evaluate the implications of the spatiotemporal variability of green vegetation for the dispersion of livestock that is required to access quality forage in semi-arid Africa. Maximum NDVI (Normalized Difference Vegetation Index) at 1 km2 resolution was determined for concentric rings (0–31 km radii) around 227 individual sample locations within the study area for 14 dates (between 1 April to 1 November) annually over the 2000–2010 period. A sigmoidal curve was fitted to points within the maximum NDVI × distance radii space to determine the asymptote distance (AD) – the radius at which further dispersion from the sample location does not lead to significant gains in access to green forage. AD was found to: increase with latitude (or increasing aridity); decline as the rainy season proceeds; and show no trend over the 2000–2010 period. These results introduce much-needed empirical data to current debates surrounding the scales of governance to support livestock mobility
UR  - https://hdl.handle.net/20.500.12665/247
T2  - Journal of Land Use Science
DO  - https://doi.org/10.1080/1747423X.2014.965280
ER  -