High Quality Content by WIKIPEDIA articles! The term Po Basin mixed forests applies to an Ecoregion in Northern Italy. It consists of remnants of: mixed deciduous oak/hornbeam forest - Quercus robur, Quercus cerris, Carpinus betulus,Ulmus minor, Fraxinus ornus. Riparian forest as well as flood-plain vegetation of the Po Basin- Fraxinus oxycarpa, Salix alba, Alnus glutinosa, Ulmus minor, Populus alba, Populus nigra, Quercus robur. The freshwater ecosystems (zona umida) have a high level of biodiversity. Threatened (in Italy) plant species include Leucojum aestivum, Halocnemum strobilaceum, Nymphaea alba, Bassia hirsuta, Limonium bellidifolium, Utricularia australis, Thelypteris palustris, Salvinia natans, Sagittaria sagittifolia and Plantago cornuti. Lesser-disturbed wetlands which are important breeding areas for many bird species are most significant biodiversity of the ecoregion. Examples are Grey Heron, Purple Heron, Great Egret, Little Egret,Squacco Heron, Cattle Egret ,Great Bittern, Little Bittern, Pygmy Cormorant and Ferruginous Duck.

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