Dr. Ravi Ranjan 

Carl von Ossietzky University of Oldenburg, GERMANY
Jul 2022 - Jun 2025
Associate Junior Fellow

Ravi Ranjan

Projekte & Publikationen

Abstract of workshop
Due to anthropogenic activities, global temperatures have risen sharply and nitrogen and
phosphorus levels have changed dramatically in aquatic and terrestrial ecosystems. Changing
temperature and nutrients can drastically alter the growth rates of plants and algae which
sequester carbon and produce almost all of Earth’s oxygen. While temperature and nutrients
do act independently on plant and algae, they also interact strongly to determine their growth
rates. The independent impacts of both temperature and nutrients on growth are non-linear.
Therefore, their interaction is complex and integrating them has been difficult.
A useful way to reduce complexity is to focus on the environmental conditions of the plant
and algal community. Environmental conditions (e.g., high or low nutrient levels, pulses of
high temperatures or nutrients) can determine the strength of the interaction between
temperature and nutrients. In our workshop, we will focus on isolating environmental
conditions which result in strong temperature-nutrient interactions. We will develop
mathematical models of plant and algal communities and analyze them to understand which
conditions cause the interaction to have the strongest effect. We will further validate model
predictions by analyzing existing datasets to see if the predicted conditions result in large
changes in real communities. Once finished, the project will guide future research by directing
it to focus on the predicted environmental conditions.