The human control on the irrigation of the Delta, makes the natural hydric cycle of the Delta lagoons change, also it change the contribution of freshwater. In consequence the submerged vegetation depends of the water salinity.
Because this salinity of the water table and the inundations caused by the sea during the storms, some dunes are appearing fixed by the vegetation.
Ammophila arenaria subsp. Arundinacea
Next to the lagoons and "Ullals" we find the reedbed, with characteristic plants like:
Phragmitescrustalis subsp. Chrysanthus
Next to the Ebre River we got the Ribera forest, dominated by:
Fraxinus s p ll.
At the "Ullals" we can find:
Water lilies (Nymphaea alba)
Vegetation at "Els Ports"
One of the attractions in Els Ports is the diversity of its vegetation. Vegetation of the Mediterranean zone is next to the Central Europe one and species that normally you find at the Pirineus.
Species about to disappear like: Salix tarraconensis, the Pinguicola dertonensis, the Rhamnus alpina, the Ulmus glabra or the Acer campestre.
Two are the trees that we can talk about in Els Ports: Taxus baccata and Fagus syl vatica.
Also we can find another kind of species, in the lower parts Pinus halepensis. In the middle Quercusilexssp ilex, Clematis fammula, Smilax aspera and Hedera helix. A nd at the highest parts, Quercusilexssp. rotundifolia.
From the 700 to 1000 meters there is Pinus nigras sp. salzmanii. Also Acer opalusssp. granatense, Buxus sempervirens, Amelanchier ovalis, Crataegus monogyna, Helleborus foetidus, Viola wilkammii, Paeonia officinalis ssp. humilis.
From the 800 meters there is Taxus baccata and Ilexaquifolium, Pinus Sylvestris, Arctostaphylos uva-ursi, Corylus avellana and Anemone hepatica.
At last where the wind stresses Anthyllis montana, Teucrium polium ssp. luteum, Aphyllanthes monspeliensis.
Atending at the mainly calcareous nature of “Els Ports” we find the Ptericlium aquilinum and the Trifolium arvense.