Atlantic Ocean 1 Bacillariophyta 1 Baltic Sea 1 Baltic sea 1 Biogeochemistry 1 Carbon 1 Cyanobacteria 1 Cyanobacterium 1 Ecosystems 1 Food supply 1 Food webs 1 Indicator indicator 1 Invertebrata 1 Isotopes 1 Isotopic niche 1 Nitrogen 1 Organic compounds 1 Organics 1 Riverine impact 1 Stable isotope of carbon (δ13C) Stable isotope of nitrogen (δ15N) 1 Stable isotopes 1 Stable isotopes of carbon (δ13C) 1 Stable isotopes of nitrogen (δ15N) 1 benthos 1 coastal zone 1 detection method 1 dissolved inorganic matter 1 feeding behavior 1 food availability 1