Relationships between the dominant phytoplankton and DIN [dissolved inorganic nitrogen]: DIP [dissolved inorganic phosphorus] ratios in Lake Biwa [Japan]

azote calidad del agua dissolution dissolving dominant species especies dominantes fitoplancton fosforo inorganic compounds japan japon lac lagos lakes nitrogen nutritive value phosphore phosphorus phytoplancton phytoplankton valeur nutritive valor nutritivo water quality