To measure the ecological changes of the Alūksne Lake and Lake Burtnieks over the last 30 years, researchers from the Institute for Environmental Solutions and Latvian Institute of Aquatic Ecology collected and analysed different parameters of historical data, as well as the data that are collected during the scientific research of the CyCLE project.
As a result of scientific research the researchers have created several databases, containing the information of the main groups of organisms that are living in the lakes – zooplankton, zoobenthos and fish community. It includes the data of species composition, biomass and fish feeding habits. To clarify the status of lake’s food-chain, they collected the data of fish feeding habits – counted the fish species in the waterbody, measured their age groups, and specific diet of these groups. To measure the water quality, the analysis of water temperature and concentration of various substances (oxygen, N-NO3, N-NO2, N-NH4, Ntot, PO4, Ptot) was carried out. Researchers also collected the information of potentially hazardous substances and heavy metals in the pilot lakes.
The databases are an important resource that helps to understand the lake food chain and find potential causes of the ecological problems in lakes. So far, there is an incomplete base of information of Latvian lakes. Historically there haven’t been holistic and detailed surveys. Therefore, new database could also play an important role in future studies and recording of environmental changes.
For more information of databases of fish communities and their feeding habits, please contact with the leading researcher of the Institute for Environmental Soltutions Matīss Žagars, t. +371 29218057
For more information of databases of zooplankton and zoobenthos, please contact with the leading researcher of Latvian Institute of Aquatic Ecology Ingrīda Puriņa, t. +371 26186367