Marian Salim Adan
© Marian Adan
Marian Salim Adan
ORCID iD 0000-0003-3808-9920
Show profile

Affiliations
  • University of Bonn – Doctoral Researcher
  • International Centre of Insect Physiology and Ecology (icipe) – Geospatial Analyst
  • International Institute of Tropical Agriculture (IITA) – Research Collaborator
  • Eagle Ranges Services – Geospatial Consultant
  • Regional Centre for Mapping of Resources for Development (RCMRD) – Remote Sensing Technician
Research topics
  • Remote sensing for ecological and agricultural monitoring
  • Pest phenology and invasive species modelling
  • Biological control and parasitoid ecology
  • Climate change impacts on pest and natural enemy Dynamics
  • Spatial analysis and GIS based decision support systems
Marian Adan is a Geospatial Analyst and Doctoral Researcher at the University of Bonn, specializing in ecological modelling, remote sensing, and sustainable pest management. Her research focuses on the phenology, spread, and biological control of fall armyworm (FAW) across African maize systems, integrating satellite data, life table experiments, and advanced mathematical models. She has worked with icipe, IITA, RCMRD, and Eagle Ranges Services on climate monitoring, invasive species management, and spatial decision support tools. Marian holds an M.Sc. in Geo Information Science and Earth Observation from the University of Twente and a B.Sc. in Environmental Planning and Management from Kenyatta University.
Selected publications

Adan, M., Tonnang, H. E., Greve, K., Borgemeister, C., & Goergen, G. (2025). Phenology and spatial modeling of native and exotic parasitoids for biological control of fall armyworm in Africa under changing climate conditions. Biological Control, 105929. https://doi.org/10.1016/j.biocontrol.2025.105929

Adan, M., Tonnang, H. E., Greve, K., Borgemeister, C., & Goergen, G. (2025). Modelling the environmental and terrestrial drivers of the spread of the invasive fall armyworm in Africa. Crop Protection, 192, 107133. https://doi.org/10.1016/j.cropro.2025.107133 

Adan, M., Tonnang, H. E., Kassa, C. E., Greve, K., Borgemeister, C., & Goergen, G. (2024). Combining temperature‑dependent life table data into ILCYM to forecast fall armyworm distribution in maize agro‑ecological zones in Africa. PLOS ONE, 19(5), e0299154. https://doi.org/10.1371/journal.pone.0299154

Adan, M., Tonnang, H. E., Greve, K., Borgemeister, C., & Goergen, G. (2023). Use of time‑series NDVI to monitor fall armyworm damage on maize production systems in Africa. Geocarto International, 38(1), 2186492. https://doi.org/10.1080/10106049.2023.2186492

Adan, M., Abdel‑Rahman, E. M., Gachoki, S., et al. (2021). Use of earth observation satellite data to guide integrated pest and pollinator management in avocado systems. Remote Sensing Applications: Society and Environment, 23, 100566.

Marian Salim Adan
© Marian Adan
Marian Salim Adan

+254 792 655 666

Junior Researcher (Dr. rer. nat. candidate in Biology)

Ecology and Natural Resources Management (ZEF ECOL)

Genscherallee 3

53113 Bonn