Figure 2
The upper chart is titled “Author keywords trends”, and the lower chart is titled “W o S keywords-plus trends”. Both charts plot terms along the vertical axis and publication years along the horizontal axis. Each term is represented by a horizontal timeline with circular points marking the years in which the term appeared. Marker sizes correspond to frequency. Author keywords trends (top chart): The vertical axis lists terms including “ecotourism”, “stakeholders”, “covid-19”, “events”, “agenda 2030”, “s d g”, “tourism”, “sustainable tourism”, “sustainability”, “sustainable development”, “circular economy”, “pro-poor tourism”, “inclusive tourism”, “decent work”, “corporate social responsibility”, “employment”, and “united nations”. The horizontal axis ranges from 2019 to 2021 in increments of 2 years. Each term appears as a horizontal line from earlier years (around 2019) to later years (around 2022). Circular points mark yearly occurrences. A legend titled “Term frequency” shows point sizes: small equals 25, medium equals 50, large equals 70. Data include: Ecotourism: one small point for 2022. Stakeholders: timeline from 2021 to 2022 with a small point in 2022. Covid-19: timeline from 2021 to 2022 with a small point in 2022. Events: small point in 2022. Agenda 2030: small point in 2021. S D G: timeline from 2019 to 2022 with a large point in 2021. Tourism: timeline from 2019 to 2022 with a medium point in 2021. Sustainable tourism: timeline from 2020 to 2022 with a medium point in 2021. Sustainability: timeline from 2020 to 2022 with a medium point in 2022. Sustainable development: timeline from 2020 to 2022 with a small point in 2022. Circular economy: timeline from 2019 to 2020 with a small point in 2020. Pro-poor tourism: timeline from 2020 to 2021 with a small point in 2020. Inclusive tourism: timeline from 2020 to 2021 with a small point in 2020. Decent work: timeline from 2019 to 2020 with a small point in 2020. Corporate social responsibility: timeline from 2020 to 2021 with a small point in 2020. Employment: timeline from 2019 to 2020 with a small point in 2019. United Nations: small point in 2019. W o S keywords-plus trends (bottom chart): The vertical axis lists terms including “ecotourism”, “2030 agenda”, “performance”, “perceptions”, “energy”, “impact”, “tourism”, “management”, “policy”, “governance”, “challenges”, “perspective”, “sustainable tourism”, “attitudes”, “sustainability”, “human-resource management”, “reflections”, “hospitality industry”, “food”, and “environmental-management”. The horizontal axis ranges from 2018 to 2022 in increments of 2 years. Each term appears as a horizontal timeline from about 2018 to 2022, with circular points marking yearly occurrences. A legend titled “Term frequency” shows marker sizes: small equals 10, medium equals 20, large equals 30. Data include: Ecotourism: timeline from 2021 to 2022 with a medium point in 2022. 2030 agenda: timeline from 2021 to 2022 with a medium point in 2022. Performance: timeline from 2021 to 2022 with a medium point in 2022. Perceptions: timeline from 2020 to 2022 with a medium point in 2022. Energy: timeline from 2020 to 2022 with a small point in 2022. Impact: timeline from 2021 to 2022 with a large point in 2021. Tourism: timeline from 2020 to 2022 with a large point in 2021. Management: timeline from 2020 to 2022 with a large point in 2021. Policy: timeline from 2020 to 2021 with a medium point in 2021. Governance: timeline from 2020 to 2021 with a medium point in 2021. Challenges: timeline from 2020 to 2022 with a small point in 2020. Perspective: timeline from 2020 to 2022 with a small point in 2020. Sustainable tourism: timeline from 2020 to 2021 with a small point in 2020. Attitudes: timeline from 2019 to 2021 with a small point in 2020. Sustainability: timeline from 2019 to 2021 with a small point in 2020. Human-resource management: timeline from 2019 to 2020 with a small point in 2019. Reflections: timeline from 2018 to 2020 with a small point in 2019. Hospitality industry: timeline from 2019 to 2020 with a small point in 2019. Food: one small point in 2019. Environmental-management: one small point in 2019.Author keywords and WoS keywords-plus trends. Source: Developed by authors