[□] □ □
[□=□] □ □
[□ & □] □ □
Nutrient , sediment and bacterial loading of lakes , rivers , reservoirs and streams can cause problems for both agricultural and non-agricultural downstream users . Because of the spiritual values ascribed to them , these sites ( groves , mountains , forests , islands , desert oases , lakes , rivers , caves , etc ., as well as entire landscapes ) many times contain relatively unaltered ecosystems where human-induced impacts are minimal . A general term applied to land areas which are seasonally or permanently waterlogged , including lakes , rivers , estuaries , and freshwater marshes ; an area of low-lying land submerged or inundated periodically by fresh or saline water . The site is characterized by a mixture of freshwater permanent lakes , rivers , associated marshes and high Andean peatlands .