Ceratophyllum demersum 1 Croatia 1 Ecosystems 1 Fish 1 Food webs 1 Functional traits 1 Krapina River 1 Lakes 1 Littoral food web 1 Littoral food webs 1 Littorals 1 Macrophytes 1 Macrozoobentho/zooplankton/fish 1 Macrozoobenthos 1 Macrozoobenthos/zooplankton/fish 1 Nuphar lutea 1 Shallow water bodies 1 Sutla River Temperate lakes 1 Water levels 1 Water-level fluctuation 1 Watersheds 1 abundance 1 backwater 1 body size 1 environmental conditions 1 food web 1 intertidal environment 1 macroinvertebrate 1 macrophyte 1