1 Environmental factors associated with long-term changes in chlorophyll-a concentration in the Amazon floodplain

The study of chlorophyll-a concentration in flood pulsed wetlands has been based mostly on datasets obtained at different sites or along track lines occupied during cruises. In situ water data, however, are limited in time and space. This is a particularly serious constrain in remote regions of difficult access, such as the Brazilian Amazon floodplain waters. Moreover, in situ sampling monitoring has a high probability of undersampling. Some authors have used satellite imagery to address the wide range of spatial and temporal variability of chlorophyll-a concentration in the Brazilian Amazon floodplain. However, the authors have estimated the chlorophyll concentration in a synoptic view. Also, they don’t explain the relationship between the chlorophyll concentration and other environmental parameters that might explain the reported time and space variability. Long-term environmental time series of continuously collected data are fundamental to identify and classify pulses and determining their role in aquatic systems. Based on this, this paper with the objective of analyze the chlorophyll-a concentration time series and their relationship with others environmental parameters uses in situ daily mean collected limnologica