Scientists and Experts Warn of Direct Link Between Ecosystem Degradation and Human Health in Tunis
On the occasion of World Biodiversity Day, celebrated on May 22nd every year, the City of Science in Tunis (CST) organized a day of study under the theme: "Nature & Health: Understanding and Protecting Our Ecosystems."
The Event
The event, held at the Al Khawarizmi auditorium, brought together researchers, academics, health experts, and representatives of civil society around a common message: biodiversity is no longer just an environmental issue, but a core concern for public health.
The Concept of "One Health"
Organized in partnership with several organizations committed to environmental protection, the meeting highlighted the concept of "One Health," an approach that considers human health, animal health, and ecosystem health as deeply interconnected. Through conferences, workshops, and screenings, the speakers emphasized that the balance of life directly affects the quality of life, social stability, and a society's ability to cope with health and climate crises.
When Nature Destruction Favors the Emergence of Diseases
Throughout the interventions, experts stressed the health consequences of environmental upheavals caused by human activity. Sami Dhouib, director of Natudev "Nature & Development," argued for a new vision of environmental policies based on a global approach combining sustainable development, preservation of natural resources, and human health.
Dr. Hechmi Louzir, former director of the Pasteur Institute in Tunis, reviewed the evolution of the "One Health" concept and its growing importance in international health strategies. Professor Mohamed Aziz Darghouth, former director of the National Veterinary Medicine School, warned about the risks associated with ecosystem destruction.
According to him, deforestation, anarchic urbanization, and habitat fragmentation modify ecological balances and favor the emergence of new infectious diseases transmissible between animals and humans.
The Essential Role of Nature in Psychological Well-being
Beyond infectious diseases, researchers also highlighted an often-overlooked aspect: the impact of biodiversity on mental health. Scientific studies conducted in recent years demonstrate that contact with nature reduces anxiety, improves concentration, and strengthens psychological balance.
People living near green spaces or environments rich in biodiversity generally have better overall health indicators and psycho-affective well-being. This vision is part of what scientists call the "mixed determinism of human health," an approach that takes into account both biological, psychological, and environmental factors.
Research in Iran Shows the Influence of Ecosystem Quality on Population Health
University research, including studies conducted in Iran, shows that ecosystem quality directly affects population health, both in rural and urban areas.
The Benefits of Biodiversity
Experts at the Tunis event also reminded us that the benefits of biodiversity go far beyond the psychological sphere. Nature plays a crucial role in improving air quality, regulating local temperatures, protecting water resources, and providing numerous food and medicinal resources.
In several cities around the world, new urban planning models are now seeking to reintroduce more green spaces to improve citizens' daily lives and reduce the effects of climate change.
Tunisian Initiatives to Protect Ecosystems
The study day also highlighted several field experiences in Tunisia in favor of biodiversity. Researcher Riadh Ghedira, representing the "Notre Grand Bleu" association, presented various marine conservation actions aimed at protecting Tunisian coastal ecosystems and raising public awareness about the fragility of the marine environment.
Other interventions focused on the biodiversity of the Belvédère park, the trophic ecology of Tunisian reservoirs, and the role of scientific mediation in environmental education.
New Silent Threats: Pollution and "Microbial Privation"
New silent threats were also raised by the speakers: the impact of chemical and biological pollution on natural balances. Pesticides, industrial waste, and residual medications present in waterways modify microbial biodiversity and weaken natural defense mechanisms in living organisms.
Some research presented during the conferences also evokes the phenomenon of "microbial privation." A low exposure to biodiversity could weaken the human immune system and favor the emergence of inflammatory and allergic diseases.
In contrast, forest environments rich in conifers produce natural substances called phytoncides, recognized for their antimicrobial and immunostimulant properties.
Conclusion
Through this scientific day, the City of Science in Tunis wanted to remind us of a reality that has become unavoidable: protecting biodiversity is no longer just an ecological commitment, but a genuine health, social, and human necessity. Preserving ecosystems is also about protecting psychological, immune, and social balance for present and future generations.
