Peer review declaration

All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single-blind • Conference submission management system: on E-mail apoot2020@yandex.ru managed by Evgeny Bykov, the editor of this volume; Institute of Ecology of Volga river basin Russian Academy of Sciences, Togljatti, Russia • Number of submissions received: 40 • Number of submissions sent for review: 31 • Number of submissions accepted: 25 • Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100): 62.5 % • Average number of reviews per paper: 1.6 • Total number of reviewers involved: 6 • Any additional info on review process: Among all the materials received, the organizing Committee pre-selected research papers to send for reviewers. All papers had undergone plagiarism check. The reviews were conducted to the professional and scientific standards. All reviewers have academic status and are scientific experts in their field. The Checklist for the reviewers included the following criteria: relevance to the scope of the conference topics, the scientific quality, the title, the abstract, the references, the quality of the figures and tables, etc. The reviewers could give the following recommendation: to publish the paper as it is, to publish it after mandatory/optional minor/major revision, to reject the paper. Review Reports was sent to authors to modify the manuscript accordingly. Revised version was evaluated by the editor, and then the editor sent the revised manuscript to the reviewers again for re-evaluation. If necessary, the review process was repeated. Based on the reviewer comments, revised manuscript was submitted by authors for final publication. The decision to accept or reject was based on the suggestions of reviewers. 2/3 of the papers were accepted after revision. Contact person for queries: Anastasia Rozenberg, Candidate of Biology, Laboratory of ecosystem modeling and management, Institute of Ecology of Volga river basin Russian Academy of Sciences, Togljatti, Russia E-mail: nana.rozenberg@gmail.com.