Does Subjective Health Affect the Association between Biodiversity and Quality of Life? Insights from International Data

Global health may depend upon biodiversity (BD) for well-being, but evaluation is challenging, as cross-cultural data is scarce. International models of the association between biodiversity (BD) and quality of life (QoL), examined whether subjective health is a mediating factor. The biophilia hypothesis was evaluated. Multi-Level Mediation Analysis modelled adult data (N = 3511) from 15 countries. Subjective QoL was assessed in six WHOQOL SRPB domains, and subjective health rated. Four area-independent indicators of plant and animal BD were estimated. Poverty (HDI education) was a covariate. Biodiversity was strongly, positively associated with QoL, but subjective health was not a significant mediator in any model. Although spiritual QoL showed best fit, confirming the hypothesis, social, psychological, and independence models were also significant. From nine spiritual components, QoL from hope and optimism showed the strongest model. Furthermore, only hope correlated moderately, positively with BD in mammals, and ferns. This is the first major international study in this field. When judging QoL in relation to BD, people do not take into account whether their health is good or poor. The exclusive biophilia focus on spiritual QoL is unwarranted, deserving a broader multi-dimensional approach. Global policy and the Millennium Ecosystem Assessment are addressed.