6 articles
Daphnia magna
Daphnia magna, commonly called the water flea, is a small freshwater planktonic crustacean living in ponds and lakes across Europe and North America, and a standard test organism in aquatic ecotoxicology.
Ecological status
Ecological status is a five-class measure of surface water ecosystem quality under the EU's 2000 Water Framework Directive, rating rivers, lakes, and coastal waters from high to bad.
Eutrophication
Eutrophication, also spelled eutrofication, is the overenrichment of a water body with nutrients, mainly nitrogen and phosphorus from fertilizer runoff and sewage, causing algal blooms, oxygen depletion, and biodiversity loss.
Nutrient criteria
Nutrient criteria are numerical water quality values for total phosphorus, total nitrogen, and response variables like chlorophyll a, set to prevent and assess eutrophic conditions.
Phoslock
Phoslock is a lanthanum-modified bentonite clay, about 95% bentonite and 5% lanthanum, that binds phosphorus in lakes and reservoirs to control eutrophication and cyanobacterial blooms.
Reference conditions (Water Framework Directive)
Reference conditions under the EU Water Framework Directive are the near-natural values for surface water quality elements, serving as the benchmark for classifying high ecological status.