Lagoonal wetland flora in whooper swan ( cygnus cygnus ) nature reserve in rongcheng of shandong .
荣成大天鹅自然保卫区泻湖湿地植物区系。
In the jurassic and cretaceous , generally it was also the shelf sea ( shallow sea ) , but there were lacustrine and lagoonal environments in different parts of the basin .
