Affiliation:
1. Leibniz Institute for Baltic Sea Research Warnemünde, Seestrasse 15, D-18119 Rostock, Germany
2. German Federal Agency for Nature Conservation, Isle of Vilm/Rügen Office, D-18581 Putbus, Germany
Abstract
To maintain or enhance biodiversity and sea floor integrity, mapping benthic habitats is a mandatory requirement in compliance with the Marine Strategy Framework Directive (MSFD). The EU Commission Decision distinguishes between Broad Habitat Types (BHTs) and Other Habitat Types (OHTs). At the regional level, biotopes in the Baltic Sea region are classified according to the HELCOM underwater biotope and habitat classification (HUB). In this study, the habitats and their benthic communities were mapped for the entire German Baltic Sea at a high spatial resolution of 1 km. In two nature conservation areas of the Exclusive Economic Zone (EEZ) as well as selected focus areas in the coastal waters, the resolution we provide is even more detailed at 50 × 50 m. Hydroacoustic data recording and benthological surveys (using bottom grabs, underwater towing camera technology, and diver sampling) helped identify biotopes in high resolution. Based on these data, together with additional data acquired since 2010 (a total of over 7000 stations and transect sections), we were able to spatially delineate benthic biotopes and their communities via predictive habitat modelling. The results are provided as full-coverage maps each for BHT, OHT, and HUB (9 classes of BHTs, 5 classes of OHTs, and 84 classes of HUB) with a level of spatial detail that does not yet exist for the Baltic Sea, and they form an essential basis for future monitoring, status assessments, and protection and management measures.
Funder
Federal Agency for Nature Conservation
Landesamt für Umwelt, Naturschutz und Geologie
Subject
General Agricultural and Biological Sciences,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology
Reference79 articles.
1. The Baltic Sea circumstances significant for its critical infrastructure networks;Bogalecka;J. Polish Saf. Reliab. Assoc. Summer Saf. Reliab. Semin.,2016
2. Snoeijs-Leijonmalm, P., Schubert, H., and Radziejewska, T. (2017). Biological Oceanography of the Baltic Sea, Springer.
3. Human-induced trophic cascades and ecological regime shifts in the Baltic Sea;Hansson;Ecosystems,2007
4. Reference state, structure, regime shifts, and regulatory drivers in a coastal sea over the last century: The Central Baltic Sea case;Tomczak;Limnol. Oceanogr.,2022
5. European Commission (2008). Directive 2008/56/EC of the European Parliament and of the Council of 17 June 2008; Establishing a Framework for Community Action in the Field of Marine Environmental Policy (Marine Strategy Framework Directive). Off. J. Eur. Union, L 164, 19–40.