Diress Tsegaye Alemu

Research Scientist

(+47) 930 53 761
diress.alemu@nibio.no

Place
Ås O43

Visiting address
Oluf Thesens vei 43, 1433 Ås

Attachments

CV

Biography

I hold a PhD degree in Management of Natural Resource Management  (2010) at the Norwegian University of Life Sciences (NMBU), Norway. I have over 20 years of international research and teaching experience in ecology and management of natural resources. previously, I worked a researcher at the University of Oslo and NMBU from July 2010- February 2023. My research focuses on patterns and processes in agricultural and natural landscapes, climate change, land use/cover  analysis,, biodiversity conservation, and wildlife management. Highly skilled with long-term experiences in organizing, and analyzing ecological data and presenting results to a high standard. Published more than 50 papers and technical reports, of which 42 are peer-reviewed scientific journal articles. I have strong modelling/statistical data analysis background with very good skills in R'/Rstudio programming, ArcGIS, and QGIS softwares. I also possess project leadership with interdisciplinary multicultural teams.

 

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Abstract

Mountain areas in Norway provide important resources for livestock grazing. These resources are crucial for agricultural production in a country with limited agricultural land and a climate and topography that restrict production of feed and food. A key contributor in the harvest of these resources has been mountain summer farming and outfield grazing in general. However, the use of mountainous grazing resources has been declining strongly for several decades with the regrowth of formerly open areas as a consequence. In contrast, recreational use, number of holiday cabins and associated infrastructure is rapidly increasing. Conflicts between recreational and agriculture use have received increasing attention in different media. We investigated the spatial patterns of cabin development and key grazing areas in Norwegian mountain areas, analysing data on livestock, cabins, and associated infrastructure. We found a large number of cabins and associated infrastructure within high-quality grazing areas indicating that the quality of grazing has not been adequately considered in the location of new cabins. Taking into consideration that cabin development seems not to decrease, the reduced availability of grazing resources may result in an increasing level of conflict and also impact food security in the long run.

To document

Abstract

Understanding the effects of variation in resource availability and habitat disturbance on the ecology of mammals is vital for successful conservation management. In this study, we examined how human disturbances, resource availability and elevation gradients influence mammal assemblages in both managed coffee forest and natural forest of the Belete-Gera National Forest Priority Area, southwestern Ethiopia. We surveyed mammals using motion-detecting infrared camera traps in 90 locations for a total of 4142 camera days. We measured distance from main roads and settlements as disturbance factors, and distance from water sources, key grazing sites, and forest edges and woody plant diversity as resource variables. We assessed the mammal assemblages in coffee forest and natural forests using generalized linear models. Further, we used linear modelling to compare the relationships of mammal detection rates by feeding guilds and body size to resource variables. In total, we recorded 8815 videos identifying 23 different mammal species. The mammal assemblages in coffee forests were negatively associated with increasing distances from key grazing sites, water sources, and elevation. In contrast, the association with increasing distance from the road and woody plant diversity was positive. In addition, herbivores and large (25–200 kg) and very large (≥200 kg) mammals, were all negatively associated with increasing distance from the natural forest edges. With the conversion of natural forest to coffee forest and the intensification of coffee forest management, sustainable management of key grazing sites, water sources, and diverse woody plant species will be essential to the conservation of mammals. In addition, to ensure mammal conservation, adjacent natural forests around coffee forests should also be protected.