Ceratophyllum demersum hampers phytoplankton development in some small Norwegian lakes over a wide range of phosphorus concentrations and geographical latitude

aquatic plants azote calcio calcium ceratophyllaceae characeae comunidades vegetales disponibilidad de nutrientes fitoplancton fosforo lac lagos lakes land latitud latitude malezas mauvaise herbe nitrogen noruega norway nutrient availability phosphore phosphorus phytoplancton phytoplankton plant communities plante aquatique potamogeton terre tierras weeds