Regional parks in Lithuania preserve the most valuable physical and cultural components of the landscape, NATURA 2000 habitats, etc. They are usually located in natural or semi-natural landscapes of rural areas. These territories, however, have a higher depopulation rate than urbanised districts. Still, conservation priority areas were expected to attract young families as permanent residents and make their population more stable. This study aims to investigate changes in the rural population in three regional parks of the Klaipėda county to determine the number of abandoned villages (with no residents) and vanishing ones (with a population < 5), as compared to territories with no conservation regime. The article examines migration as one of the determinants of depopulation. The analysis of national and local statistics, institutional documents, and structured interviews revealed that the conservation regime applied in regional parks did not necessarily encourage local people to stay or newcomers to arrive. Proximity to the sea and towns with developed social infrastructure remains a priority when looking for a residence in the countryside.

The causal relationship of changes in nitrogen and phosphorus concentrations in the Akmena-Danė River and its largest tributary, the Eketė River, was analysed for the period 1999–2014. Results showed that the annual concentrations of NH₄-N and PO₄-P significantly decreased in the Eketė River over the research period. NH₄-N also significantly decreased in the Akmena-Danė River. This was mostly due to the shrinkage of agriculture, i.e., the reduction in agricultural land area, total farm and animal numbers and other agricultural activities. The effect of other factors such as air temperature, precipitation rate, shift of precipitation maximum from warm to cold season, drainage runoff from the large tile-drained areas, soil types and the slight increase in forested land was also examined.