Anna C TREYDTE
2015 – present Associate professor: Biodiversity Conservation and Ecosystem Management, School of Life Sciences and Bioengineering, Nelson-Mandela African Institution of Science and Technology, Arusha, Tanzania
2013 – present Adjunct lecturer: Agroecology in the Tropics and Subtropics, University of Hohenheim, Stuttgart, Germany
2013 Habilitation: Agroecology, University of Hohenheim, Stuttgart, Germany
2004 PhD: Geobotanical Institute, ETH Zürich, Switzerland; Thesis title: Habitat use of wildlife and diet preferences of the common warthog on a former cattle ranch in a Tanzanian savanna
2000 MSc: Evolutionary Ecology and Organismal Biology, Ohio State University, Columbus, OH, USA. Thesis title: An Optimal Management Strategy for Arabian Oryx in Mahazat as-Sayd, Saudi Arabia
2018 – present A. Asenga, MSc thesis: Spatial Component of Woody encroachment: Impacts on Plant Functional Groups and Predators (NM-AIST and MaswaGR)
2018 – present G. Nchimbi, MSc thesis: Re-colonization of flora and fauna in the post mining area of Lake Manyara National Park, Tanzania (NM-AIST and TANAPA)
2018 – present W. Kananga, MSc thesis: Managing the invasive plant Parthenium hysterophorus and its socio-economic impact on local communities in Arusha, Tanzania (NM-AIST and TPRI)
2018 – present N. Felix, MSc thesis: Effects of retaliatory killing on the dynamics of male lion coalitions: a case study in Tarangire Manyara Ecosystem (NM-AIST and TAWIRI)
2018 – present R. Mapunda, PhD thesis: Evaluating the status of the endangered Usambara Akalat (Sheppardia montana), in an eastern Afro-montane hotspot, Tanzania (NM-AIST and UDSM)
2018 – present E. Mohammed, PhD thesis: Effects of overgrazing and illegal harvesting on the regeneration and ecology of Balanites aegyptiaca and Ziziphus spina-christi in Dinder Biosphere Reserve, Sudan (NM-AIST and University of Khartoum)
2018 – present P. Shayo, PhD thesis: The contribution of oysternuts (Telfairia pedata) to biodiversity conservation and improved community livelihoods in northern Tanzania (NM-AIST and Sokoine University of Agriculture)
2018 – present F. Thomas, PhD thesis: The role of rangeland pollinators for pastoralist livelihoods in northern Tanzania (NM-AIST and Ministry of Agriculture)
2017 – present MA Garko, PhD thesis: Can native woody species compete with exotics in their ecosystem functions and economic benefits? A case study of the Sudan Savanna, Nigeria (NM-AIST and University of Nigeria)
2017 – present F. Ojija, PhD thesis: Invasive species impact on insect functional groups – the case study of Lantana camara in Tanzania (NM-AIST and Greenwich University)
2017 – present C. Leweri, PhD thesis: Pastoralism and wildlife conservation in the face of climate change: will shifts in movement patterns and herding strategies resolve conflicts? (NM-AIST and NCAA)
2017 – present S. Abihudi, PhD thesis: Phylogenetic relationships, occurrence and sustainable harvesting of Aloe spp. in Tanzania (NM-AIST and University of Uppsala)
2017 – 2019 H. Kimaro, MSc thesis: The dynamics of bush encroachment through Acacia drepanolobium in the Mara Region, Tanzania (NM-AIST and Wake Forest University)
2017 – 2019 J. Lyakurwa, MSc thesis: How humans impact the habitat structure for reptiles in the Uzungwa Scarp Forest Reserve (NM-AIST)
2017 – 2019 A. Baltazary, MSc thesis: Wildlife-livestock interaction: is the feeding behaviour of wildlife influenced by livestock? (NM-AIST and Norwegian Technical University)
2015 – present G. Mayengo, PhD thesis: Understanding the importance of termite mounds and other nutrient hotspots for ungulates in the Issa Valley, Tanzania (NM-AIST and University of Liverpool)
2014 – 2017 N. Emmanuel, PhD thesis: Drivers of human-elephant conflicts and their management implications: a case of Rombo area, Kilimanjaro, Tanzania (NM-AIST)
2014 – 2017 I. Ngondya, PhD thesis: Invasive species management for sustainable ecosystem conservation in the Ngorongoro Ecosystem, Tanzania (NM-AIST)
Teaching at NM-AIST
Strategic Conservation Planning, MSc Module LiSE 6332
Conservation Biogeography, MSc-Module LiSE 6265
Restoration Ecology, PhD-Module LiSE 7265
Population Ecology and Modelling LiSE 7263
Employment record
2015 – present Associate professor: Biodiversity Conservation and Ecosystem Management, School of Life Science and Bioengineering, Nelson-Mandela African Institution of Science and Technology, Arusha, Tanzania
2016 – present Deputy Centre Leader: World Bank project on the African Centre of Excellence, CREATES (Centre for REsearch, Agricultural advancement, Teaching Excellence and Sustainability) NM-AIST, Arusha, Tanzania
2013 – present Adjunct lecturer: Agroecology in the Tropics and Subtropics, University of Hohenheim, Stuttgart, Germany
2013 – 2016 Consultant: BMZ / GIZ projects on drought resilience and Prosopis spp. invasion in the Afar region, Ethiopia
2013 – 2016 Station manager: DFG Kili FOR 1246; Nkweseko, Kilimanjaro, Tanzania and Dept. of Zoology, University of Würzburg, Germany
2008 – 2013 Lecturer: Agroecology in the Tropics and Subtropics, University of Hohenheim, Stuttgart, Germany
2007 – 2008 Post-doc: Plant Ecology and Nature Conservation, University of Potsdam, Germany (host: F. Jeltsch) and Mpala Research Centre, Laikipia, Kenya
2007 – 2008 Research assistant: BIOTA South (Biodiversity Transect Africa), Plant Ecology and Nature Conservation, University of Potsdam, Germany
2005 – 2007 Post-doc: Resource Ecology, Wageningen University, Wageningen, The Netherlands (host: H.H.T. Prins)
2004 – 2005 Scientific assistant: EcoStrat ecological agency (GMO risk assessment), Zürich, Switzerland
2004 – 2005 Administrative assistant: University of Applied Sciences in Educating Children with Learning Difficulties, HFH Zürich, Switzerland
2001 – 2004 Research station manager: supervising staff members and students at Mkwaja Ranch, Tanga, Tanzania
Field of expertise
Prof. Anna’s overarching research questions are: What drives land degradation and biodiversity declines in and around cultivated and protected landscapes? How do plants and animals respond to these phenomena? How can we sustainably use our natural resources and their ecosystem services and functions?
Anna’s research is situated at the interface between human agricultural and infrastructure activities and the natural processes occurring in protected/undisturbed areas. Her research investigates and strives to design our future human-dominated landscapes for potential livelihood benefits and productivity gains without compromising on natural biodiversity. Her current and future research activities focus on how human land use and climate change affect our natural resources, i.e., the ecosystem services and functions deriving from biodiversity. Main research topics encompass:
1) With increasing climatic extremes (droughts, higher temperatures) as well as enhanced human activities, invasive species might benefit and outcompete native species. Understanding their spread and competitive success is needed to find effective control mechanisms. Anna’s research comprises experiments on management and field observations. Her current work on invasives includes studies on how these plant species affect native plant and animal species, models on how this species will spread in the future as well as novel management technologies to suppress and mitigate the current invasion.
2) Invading woody vegetation further alters micro- and macro-climatic characteristics of landscapes. Anna’s research on woody encroachment patterns into open grasslands / savanna habitats in eastern and southern Africa has shown how woody vegetation impacts nutrients, biomass and carbon stocks in sub-canopy plants and soils as well as associated wild and domestic herbivores.
3) Anna’s studies have highlighted parallels on how domestic and wild herbivores alter habitat structure and functions through herbivory. Using livestock from overgrazed areas to improve nutrient cycles of underutilized protected lands promises a relieve for ever-declining pastoral areas and a support for local pastoralism adjacent to protected areas if managed accordingly. She investigates rangeland management approaches that help restoring non-usable grounds while maximizing vegetation and livestock productivity.
4) Anna’s research on restoration and rehabilitation through nutrient improvement and water-conserving practices using dung as manure and inclusion of woody vegetation in cultivated areas will help improving cultivation yields and livestock productivity. Fostering and maintaining diversity in agro-ecological landscapes such as including underutilized plant species will help enhance livelihoods and income generation of small-scale farmers and pastoralists.
5) Human-wildlife conflicts around protected areas particularly impact small-scale farmers. Crop-raiding and severe damage to humans and their livelihoods has become more frequent in times of land-use pressure and climate change. Anna’s research has investigated wildlife movement patterns, located spatial and temporal conflict hotspots and provided suitable buffer zone / corridor designs.
6) Anna is further part of a team working on the establishment and maintenance of a Botanical Garden at NM-AIST, which includes native and endemic plant species that are important for medicinal purposes as well as for natural extracts to reduce pesticide or invasive species infestation. This is done in collaboration with the Tropical Pesticides Institute (TPRI) as well as the Natural History Museum in Arusha, Tanzania.
Research funds
Prof. Anna has successfully acquired a number of grants , summing up to more than 6 Mill US$, from the World Bank, Humboldt Foundation, German Research Foundation (DFG), Swiss National Foundation (SNF), National Science Foundation USA, National Geographic, Rufford Foundation, IDEA WILD, Hans-Boeckler Foundation, Heinrich Boell Foundation, Bundesministerium fuer Bildung und Forschung (BMBF, BMZ, GIZ), German Academic Exchange (DAAD) and others.