School of Sustainability Graduate Culminating Experiences
Student capstone and applied projects from ASU's School of Sustainability.
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- Creators: Cease, Arianne
Description
In Senegal, West Africa, soils are a vital resource for livelihoods and food security in smallholder farming communities. Low nitrogen (N) soils pose obvious challenges for crop production but may also, counterintuitively, promote the abundance of agricultural pests like the Senegalese locust, Oedaleus senegalensis. In this study I investigated how the abundance of locusts and grasshoppers are impacted by soil fertility through plant nutrients and how these variables change across land use types. We worked in two rural farming villages in the Kaffrine region of Senegal. Overall, there was little variation in soil properties and an agricultural landscape low in soil organic matter (SOM) and inorganic soil nitrogen. I corroborated that SOM is a significant driver of soil inorganic N, which had a positive relationship to plant N content. Of the management practices we surveyed, fallowing fields was important for soil nutrient restoration and years spent fallow was significantly correlated to inorganic soil N and SOM. O. senegalensis was least abundant in groundnut areas where plant N was highest. Additionally, I found a significant negative correlation between O. senegalensis abundance and plant N, suggesting that plant nutrients are an important driver of their populations. Grasshoppers, excluding O. senegalensis, were more numerous in grazing areas and fallow areas, perhaps due to a higher diversity of ecological niches and host plants. These results connect land use, soil, and vegetation to herbivores and suggest that improving soil fertility could be used as an alternative to pesticides to keep locusts at bay and improve crop yields.
ContributorsWord, Mira (Author) / Hall, Sharon (Contributor) / Robinson, Brian (Contributor) / Manneh, Balanding (Contributor) / Beye, Alioune (Contributor) / Cease, Arianne (Contributor)
Created2018-04-10
Description
Girl Scouts – Arizona Cactus-Pine Council is a mission driven organization that aims to help build the leaders of tomorrow. Girls in Girl Scouts-Arizona Cactus-pine are served through mission building programs that aim to build girls of courage confidence and character who make the world a better place (Girl Scouts, 2017). The intention of my sustainability engagement initiative was to ask staff to take part in a three-phased program that encouraged them to think differently. The initiative asked them to look at how, as an organization they can work to improve their sustainability habits. Tasking them to be just as impactful as the girl members that are served through Girl Scouting. However, as planning progressed towards implementation, plans were put on hold as the organization restructured due to a major culture shift outside the organization. Sustainability still remains a focus, and the engagement plan will be put into effect at a later time.
ContributorsPontius, Cristi (Author)
Created2018-04-13