Investment in woody vegetation to counter land degradation and improve livelihoods is increasing, primarily revitalized by efforts to enhance carbon sequestration and climate change adaptation. Sudano-Sahelian West Africa is in focus for several interventions to increase woody vegetation for improved livelihoods. However, the knowledge on how woody vegetation maintains landscape productivity and contributes to livelihoods is widely scattered across different scientific fields.
Here we review different bodies of literature including a total of 30 species of woody vegetation. We use ecosystem services as a lens to integrate knowledge about how woody vegetation affect ecosystem processes and contribute to livelihoods. We find that the majority of the species generate multiple provisioning ecosystem services. Medicinal uses, contribution to fodder for livestock and importance for human nutrition are reported for almost all species.
Regulating ecosystem services are studied for a more narrow set of species. There are mainly positive or no effects on soil nutrients, soil carbon and soil water content. The overall effect of woody vegetation on crop yields is mediated through multiple processes and shows both positive and negative effects.
The majority of studies are focused on effects of individual elements of woody vegetation, with very limited landscape scale analyses. Differences between beneficiaries of ecosystem services are only discussed in a few studies, and only in relation provisioning services. Therefore, future studies need to address landscape scale effects and how the benefits of ecosystem services are distributed among beneficiaries, to provide knowledge that is even more relevant for interventions that aim to enhance climate mitigation and adaptation, ecosystem restoration, as well as poverty alleviation.
General news | 2017-12-12
See video from eminar with Professor Rashid Sumaila, one of the world’s most innovative researchers on the future of the oceans
Research news | 2017-11-30
The PECS-II conference showcased place-based research and how it can help us work towards global sustainability in the Anthropocene
Research news | 2017-11-28
How urban greening and civic ecology projects can improve human well-being and restore crucial ecosystem services
Research news | 2017-11-27
What plantain farmers in Costa Rica can teach us about the inconsistent links between access to ecosystem services and well-being
Research news | 2017-11-23
Centre science director well established among world’s most top-cited and influential scientists
Research news | 2017-11-21
Large-scale changes in Arctic marine food web can be expected within 50 years, some good, but in the long run several critical