06.11.2014 | University of Bonn: Land use changes and invasion dynamics of shrubs in East Africa

Date: 06.11.2014, 17:00 – 18:30 h

Location: Institut für Geodäsie und Geoinformation, Nussallee 1, HS I

Lecturer: Prof. Dr. Mathias Becker

In the semi-arid savannahs of Kenya, the recent spread of invasive species in both the rangelands and the cropland is changing human-environment interactions at different scales. The presentation reports on recent observations and proposes possible drivers of bush encroachment by the alien species Prosopis juliflora and the native Dodonaea viscosa. It also describes strategies of resource users in the face of changing bio-geophysical conditions under bush invasion. Preliminary analyses suggest that increased climate variability had triggered changes in land management and livelihood strategies by both the pastoral and the farming communities that in turn have paved the way for bush encroachment. The combined threats of climate variability and rapid invasion dynamics increasingly exceed the adaptive capacity of communities. As a result, the social-ecological systems of the dryland savannahs in Kenya are seen to be headed towards a state of collapse.

Organised by: ARTS (Agricultural Sciences and Resource Management in the Tropics and Subtropics)

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Source: Information by the University of Bonn from 05.11.2014