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- All Subjects: conservation
- Creators: Shrestha, Milan
and local economies. However, the negative impacts of invasive species are not always
immediately visible and may be disregarded by local communities if social benefits of
control efforts are not clear. In this dissertation, I use a mixed-methods approach to
investigate the drivers of invasive plant distribution, potential financially feasible
management techniques to control invasion, and community forest user perceptions of
those techniques. In this work, I aim to incorporate the diverse perspectives of local
people and increase the long-term success of invasive species control activities in socio
economically vulnerable populations.
Integrating a spatially and temporally diverse data set, I explore the social and
ecological drivers of invasive plant abundance across 21 buffer zone community forests
in the Western Chitwan Valley of Nepal. I evaluate to what extent forest user and
collective manager activities, the legacies of historic activities, and ecological properties
influence present-day invasive plant abundance. I built upon this study to identify areas
with critically high levels of invasion then initiated a three-year, community-based
management intervention to evaluate traditional and adaptive land management
approaches to control invasive plants. I found that both approaches reduced invasive
plant abundance relative to the surrounding, untreated forest. I then interviewed focus
groups to investigate their perceived efficacy of the various treatment types and found
that almost all forest users and managers preferred the adaptive approach over the
traditional management approach. Notably, forest users cited the importance of the
availability of forest resources and lack of harmful plants in the plots that had undergone
this method. Understanding how forest users relate to and experience invasive plants has
been relatively understudied but can influence forest user engagement in different
management approaches. For this reason, I performed in-depth ethnoecological
interviews to explore how forest users perceive, how they utilize, and to what extent they
value invasive plants. This mixed-methods approach contributes to a more holistic
understanding of the role that local people play in invasive plant management and
restoration activities.
Located directly south of Pima County, Arizona, there is a culturally rich community known as Santa Cruz County, Arizona. Santa Cruz County is a smaller community being home to an estimated 47,000 people. Santa Cruz County has a rich history given its proximity to the United States-Mexico border. One example of this rich history can be found at the Tumacacori National Historical Park (NHP) with the attractive and unique ruins. The Tumacacori NHP was once an active Spanish mission that oversaw the religious expansion and communal resources. While the Tumacacori NHP no longer operates in this manner, it does serve an important role in providing visitors with a diverse and immersive look into the history of the region and the Tumacacori mission. While the Tumacacori NHP is meant to be a place for all people to visit, most visitors are not from the local community. The reason for this stems from a lack of educational and engagement opportunities between the Tumacacori NHP and the community youth, mainly due to community members being unaware of the park’s existence or the programs that are offered. This project analyzes and uncovers this disconnect as well as the barriers between the Tumacacori NHP and the Santa Cruz County youth through a research study and the use of children’s literature.