Fig. 4
From: Evidence on the impact of Baltic Sea ecosystems on human health and well-being: a systematic map
Study design formats of the included full-text references (n = 67). Some articles were double-coded. Observatory refers to case studies where populations or areas were observed. Review refers to articles that took a selection of papers to examine a topic. Modelling refers to the theoretical development of concepts. Comparative refers to articles with multiple site observations. Mapping refers to either the mapping of ecosystem services or quantifying of a component of an area, for example nitrogen retention of a wetland. Experimental refers to a study where parameters are tested, for example choice experiment