首页|Effects of livestock on nitrogen and carbon cycling in a savanna in Burkina Faso

Effects of livestock on nitrogen and carbon cycling in a savanna in Burkina Faso

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  • NSTL
  • Elsevier
The nitrogen and carbon cycles are fundamental ecosystem processes influenced by several factors including soil type and other abiotic factors, plant species, grazing and soil organisms. Herbivores profoundly influence the functioning of ecosystems and the recycling of nutrients in interaction with plants in natural ecosystems. This study focuses on the effects of livestock on carbon and nitrogen cycling in a grazed savanna in Burkina Faso. Dominant grass species (aerial and root parts) and soil samples were collected under grasses and bare soil patches in 48 plots (24 protected and 24 unprotected plots), 18 months after setting up herbivores exclosures. Soil and grass C-13 and N-15 were used as integrative indicators of carbon and nitrogen cycles. The results revealed no significant effect of livestock on soil total carbon and nitrogen and on soil delta C-13 and delta N-15 values. Moreover, grazing had no significant effect on grass carbon and delta C-13, while it significantly increased grass total nitrogen and delta N-15. Therefore, our hypothesis that grazing would increase soil C-13 and N-15 values and plant biomass was only verified for grass N-15. Grass delta N-15 results suggest that grazing improves the immediate availability of nitrogen but could also increase nitrogen losses.

Carbon and nitrogen cyclesC-13 and N-15Grazed savannaGrassLivestock

Ye, Lambienou、Lata, Jean-Christophe、Nacro, Hassan Bismarck、Masse, Dominique、Barot, Sebastien

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Univ Dedougou, BP 176, Dedougou, Burkina Faso

Sorbonne Univ, Univ Paris, Inst Ecol & Environm Sci Paris, UPEC,CNRS,INRA,IRD,UMR 7618,iEES Paris, Tour 44-45,4 Pl Jussieu, F-75005 Paris, France

Univ Nazi BONI Bobo Dioulasso, IDR, LERF, BP 1091, Bobo Dioulasso, Burkina Faso

Univ Montpellier, IRD, INRAE, UMR 210,ECO & SOLS,Inst Agromontpellier SupAgro,C, Pl Viala Bt 12, F-34060 Montpellier 2, France

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2021

10.1016/j.actao.2020.103694

Acta oecologica

Acta oecologica

ISSN：1146-609X
年,卷(期)：2021.110
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