Hamadi Dulle









Hamadi Iddi Dulle

Ph.D. student


Field of interest

I have worked in areas of a wide ecological range from mountains in tropical cloud forests to savannah in Tanzania Parks and deserts in Israel. I have a strong interest in ecological studies including trophic interactions under contemporary climate and land use change.  My current research is concerned with temporal change in forest bird community under the influence of climate and land use change.

The overall aim of my current study is to determine elevational shifts by the understorey bird species on the two selected slopes of Mt. Kilimanjaro as response to the changed climate and land use. To assess the potential effect of changed climate and land use I will quantify the elevational shifts of forest bird community by comparing the elevational ranges along the two slopes between 1991 and 2011. On the other hand land use change interacts with climate change to determine elevational shifts, change in species richness, abundances and composition to higher elevations.

Specifically I will determine if climate change has the strongest influence on range limits of the understorey bird species along the elevational gradient as a result of tracking the changing climate. I will also quantify if land use change has the strongest influence on community composition (species assemblages). In this case I will determine if the number of forest specialists have decreased with an increased number of forest generalists and forest visitors. Generalist species might have increased their prevalence at the expense of sedentary specialists. I expect that high abundance of the understory birds to have shifted towards higher elevations along elevational gradient between two slopes over a 20–year period. Similarly, bird species with similar ecological characteristics will exhibit similar responses to climate change and likely to have species richness increased at higher elevations over a 20–year period.

Another aspect of my current study is the application of artificial fruits and insects in measuring the ecological role of seed dispersal and arthropod predation along elevational and land use gradients by birds. To establish the effect of fruit color on seed dispersal and insect predation by birds and others animal groups in different habitats. The question is whether artificial fruit colors and habitat types significantly affects pecking rates, and if so, to what extent.


Phone: +49 (0)69 7542 1845