Articles | Volume 12, issue 14
Biogeosciences, 12, 4407–4419, 2015
https://doi.org/10.5194/bg-12-4407-2015
Biogeosciences, 12, 4407–4419, 2015
https://doi.org/10.5194/bg-12-4407-2015

Research article 29 Jul 2015

Research article | 29 Jul 2015

Does EO NDVI seasonal metrics capture variations in species composition and biomass due to grazing in semi-arid grassland savannas?

J. L. Olsen et al.

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AR by Svenja Lange on behalf of the Authors (02 Jun 2015)  Author's response
ED: Publish as is (22 Jun 2015) by Christoph Spirig
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Short summary
Limitations of satellite-based normalized difference vegetation index (NDVI) for monitoring vegetation trends are investigated using observations from the Widou Thiengoly test site in northern Senegal. NDVI do not reflect the large differences found in biomass production and species composition between grazed and ungrazed plots. This is problematic for vegetation trend analysis in the context of drastically increasing numbers of Sahelian livestock in recent decades.
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