Study site

Multiannual sampling

Analyses of environmental and meteo-climatic variables

Phytoplankton analyses

Data and statistical analysis (2006–2015)

Statistical analyses of the long-term dataset (1988–2015)

Watershed land cover and land use analysis

Multiannual trends of meteo-climatic and environmental parameters (2006–2015)

Multiannual phytoplankton trends (2006–2015)

Multiannual changes in phytoplankton composition (2006–2015)

Relationships between phytoplankton and environmental variables (2006–2015)

Long-term dynamics of meteo-climatic, environmental and phytoplankton parameters (historical dataset 1988–2015)

Long-term variation of watershed land cover and uses (1990–2000–2008)

Multiannual summer decrement in nutrient concentrations

Multiannual trends of summer phytoplankton

Environmental drivers of multiannual phytoplankton variations