“…The first theme is the most central, but it can be said that all three are highly developed and essential in the construction of the research area. Although "sustainability" will not appear again in the following periods of the field's evolution, it is a transdisciplinary concept [71,72] which, as can be seen in its network of keywords ( Figure 5), is related to 11 other keywords: "ecotourism", "recreation", "planning", "conservation", "agriculture", "destination", "islands", "land use", "resources", "environment" and "globalization". Although "sustainability" does not appear in the conceptual maps of the following stages, most of these keywords do, so it cannot be said that sustainability is not being addressed after 2003, but rather that it is being worked on in a less direct and more transversal way in conjunction with various other themes.…”