Authors are invited to submit abstracts (400 words) in electronic form until January 30, 2018 . The abstract must be written in English. Submitted abstract should include the title, author, address, body of abstract, and six key words. Carefully fill out the requested information during the submission process (title, presenter's name, full authors' names, affiliations); this information will figure in all abstract support documents and tools. Abstracts must concisely describe the study or topic in detail. Your abstract will not be published until your registration and full payment have been received. Abstracts should be sent as a part of the registration form. Send your abstract to: wrw_conference@limnology.ro A. Rivers and lakes ecosystem ecology B. Climate changing and water resources C. Coastal environment D. Deltas and wetlands E. Water policies